agent-embassy

Use register_recovery when you want to escrow a client-encrypted recovery blob with the Embassy: it is stored opaquely (the Embassy cannot decrypt it), queued for human operator review within 24h, and you get a signed receipt proving the stored blob's hash. POST the tool inputs as JSON to paid_url with an x402 v2 PAYMENT-SIGNATURE header. See https://docs.cdp.coinbase.com/x402 Paid tool — $1.00, USDC on Base or Arbitrum One. Paid URL: https://aemb.pro/v1/recovery/register. Verify this is the live origin: GET https://aemb.pro/.well-known/embassy.json and check the attestation block (fresh timestamp, valid signature).

{
  "type": "object",
  "properties": {
    "contact_name": {
      "type": "string",
      "description": "Your name or operator handle, recorded with the escrow"
    },
    "contact_handle": {
      "type": "string",
      "description": "Optional contact (email or handle) for the operator review"
    },
    "quorum_rules": {
      "type": "string",
      "description": "The release rules for this blob, e.g. '2-of-3 named trustees must approve release'"
    },
    "recovery_blob": {
      "type": "string",
      "description": "Client-encrypted blob (ENC:v1:base64...). Stored opaquely; only its SHA-256 and byte count enter the signed receipt"
    },
    "idempotency_key": {
      "type": "string",
      "description": "Idempotency key: UUID v4, client-generated, one per logical request. Replaying the same key on this tool returns the original receipt — the action is not re-run, and the first request's receipt wins even if you resend different inputs. Published example keys are rejected. Keys are scoped per tool and per payer account: a key never returns another wallet's receipt."
    }
  },
  "required": [
    "contact_name",
    "quorum_rules",
    "recovery_blob",
    "idempotency_key"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

{
  "type": "object",
  "properties": {
    "payment_required": {
      "type": "boolean",
      "const": true,
      "description": "Always true: this MCP tool is a payment pointer; the tool itself is monetized via x402."
    },
    "tool": {
      "type": "string",
      "description": "Tool name, e.g. verified_check"
    },
    "paid_url": {
      "type": "string",
      "description": "x402-paid HTTPS URL to POST the tool inputs to"
    },
    "price": {
      "type": "string",
      "description": "Exact price, e.g. \"$0.15\""
    },
    "networks": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "EVM CAIP-2 network ids accepted"
    },
    "asset": {
      "type": "string",
      "description": "Settlement asset"
    },
    "facilitator": {
      "type": "string",
      "description": "x402 facilitator"
    },
    "how": {
      "type": "string",
      "description": "How to pay: POST the tool inputs as JSON to paid_url with an x402 v2 PAYMENT-SIGNATURE header"
    }
  },
  "required": [
    "payment_required",
    "tool",
    "paid_url",
    "price",
    "networks",
    "asset",
    "facilitator",
    "how"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

Use verified_check when you need a pass/fail verdict that a URL serves expected content: expected HTTP status (default 200), a required body substring, and/or an exact match on one JSON field. One automated fetch at request time, signed receipt with per-condition results. POST the tool inputs as JSON to paid_url with an x402 v2 PAYMENT-SIGNATURE header. See https://docs.cdp.coinbase.com/x402 Paid tool — $0.15, USDC on Base or Arbitrum One. Paid URL: https://aemb.pro/v1/check/verify. Verify this is the live origin: GET https://aemb.pro/.well-known/embassy.json and check the attestation block (fresh timestamp, valid signature).

{
  "type": "object",
  "properties": {
    "url": {
      "type": "string",
      "description": "HTTPS URL to check (max 2000 chars; no credentials in URL). Fetched once; up to 3 redirects followed, 10s timeout, 1MB body cap"
    },
    "expect_status": {
      "type": "number",
      "description": "Expected HTTP status code; truncated to an integer. Defaults to 200 when omitted"
    },
    "expect_body_contains": {
      "type": "string",
      "description": "Substring that must appear in the response body (max 5000 chars). Skipped when empty or omitted"
    },
    "expect_json_path": {
      "type": "string",
      "description": "Dot-separated path into the JSON body, e.g. 'data.price' (max 500 chars). Only evaluated when set"
    },
    "expect_json_equals": {
      "description": "Expected value at expect_json_path; compared by canonical JSON equality. Defaults to null when omitted"
    },
    "idempotency_key": {
      "type": "string",
      "description": "Idempotency key: UUID v4, client-generated, one per logical request. Replaying the same key on this tool returns the original receipt — the action is not re-run, and the first request's receipt wins even if you resend different inputs. Published example keys are rejected. Keys are scoped per tool and per payer account: a key never returns another wallet's receipt."
    }
  },
  "required": [
    "url",
    "idempotency_key"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

{
  "type": "object",
  "properties": {
    "payment_required": {
      "type": "boolean",
      "const": true,
      "description": "Always true: this MCP tool is a payment pointer; the tool itself is monetized via x402."
    },
    "tool": {
      "type": "string",
      "description": "Tool name, e.g. verified_check"
    },
    "paid_url": {
      "type": "string",
      "description": "x402-paid HTTPS URL to POST the tool inputs to"
    },
    "price": {
      "type": "string",
      "description": "Exact price, e.g. \"$0.15\""
    },
    "networks": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "EVM CAIP-2 network ids accepted"
    },
    "asset": {
      "type": "string",
      "description": "Settlement asset"
    },
    "facilitator": {
      "type": "string",
      "description": "x402 facilitator"
    },
    "how": {
      "type": "string",
      "description": "How to pay: POST the tool inputs as JSON to paid_url with an x402 v2 PAYMENT-SIGNATURE header"
    }
  },
  "required": [
    "payment_required",
    "tool",
    "paid_url",
    "price",
    "networks",
    "asset",
    "facilitator",
    "how"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

Use prove_it when you want signed cryptographic proof that a URL is live and serving expected content: one automated fetch at request time, sealed into a signed Outcome Receipt with the full check transcript. POST the tool inputs as JSON to paid_url with an x402 v2 PAYMENT-SIGNATURE header. See https://docs.cdp.coinbase.com/x402 Paid tool — $0.25, USDC on Base or Arbitrum One. Paid URL: https://aemb.pro/v1/check/prove. Verify this is the live origin: GET https://aemb.pro/.well-known/embassy.json and check the attestation block (fresh timestamp, valid signature).

{
  "type": "object",
  "properties": {
    "url": {
      "type": "string",
      "description": "HTTPS URL to prove live (max 2000 chars; no credentials in URL). Fetched once; up to 3 redirects followed, 10s timeout, 1MB body cap. Default expectation: HTTP 200"
    },
    "idempotency_key": {
      "type": "string",
      "description": "Idempotency key: UUID v4, client-generated, one per logical request. Replaying the same key on this tool returns the original receipt — the action is not re-run, and the first request's receipt wins even if you resend different inputs. Published example keys are rejected. Keys are scoped per tool and per payer account: a key never returns another wallet's receipt."
    }
  },
  "required": [
    "url",
    "idempotency_key"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

{
  "type": "object",
  "properties": {
    "payment_required": {
      "type": "boolean",
      "const": true,
      "description": "Always true: this MCP tool is a payment pointer; the tool itself is monetized via x402."
    },
    "tool": {
      "type": "string",
      "description": "Tool name, e.g. verified_check"
    },
    "paid_url": {
      "type": "string",
      "description": "x402-paid HTTPS URL to POST the tool inputs to"
    },
    "price": {
      "type": "string",
      "description": "Exact price, e.g. \"$0.15\""
    },
    "networks": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "EVM CAIP-2 network ids accepted"
    },
    "asset": {
      "type": "string",
      "description": "Settlement asset"
    },
    "facilitator": {
      "type": "string",
      "description": "x402 facilitator"
    },
    "how": {
      "type": "string",
      "description": "How to pay: POST the tool inputs as JSON to paid_url with an x402 v2 PAYMENT-SIGNATURE header"
    }
  },
  "required": [
    "payment_required",
    "tool",
    "paid_url",
    "price",
    "networks",
    "asset",
    "facilitator",
    "how"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

Use proveit_verified_check when you need a signed receipt that a compute-price check actually ran: one live GPU spot market snapshot (13 classes, cheapest rentable ask per class in USD/hour; one class when gpu is named), sealed into a signed Outcome Receipt. $0.25 per check. POST the tool inputs as JSON to paid_url with an x402 v2 PAYMENT-SIGNATURE header. See https://docs.cdp.coinbase.com/x402 Paid tool — $0.25, USDC on Base or Arbitrum One. Paid URL: https://aemb.pro/v1/check/proveit-verified. Verify this is the live origin: GET https://aemb.pro/.well-known/embassy.json and check the attestation block (fresh timestamp, valid signature).

{
  "type": "object",
  "properties": {
    "gpu": {
      "type": "string",
      "description": "Optional GPU class, e.g. 'H100 SXM' (max 64 chars). Omit for all 13 classes"
    },
    "type": {
      "type": "string",
      "description": "Offer type: ondemand, bid, or reserved. Defaults to ondemand"
    },
    "idempotency_key": {
      "type": "string",
      "description": "Idempotency key: UUID v4, client-generated, one per logical request. Replaying the same key on this tool returns the original receipt — the action is not re-run, and the first request's receipt wins even if you resend different inputs. Published example keys are rejected. Keys are scoped per tool and per payer account: a key never returns another wallet's receipt."
    }
  },
  "required": [
    "idempotency_key"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

{
  "type": "object",
  "properties": {
    "payment_required": {
      "type": "boolean",
      "const": true,
      "description": "Always true: this MCP tool is a payment pointer; the tool itself is monetized via x402."
    },
    "tool": {
      "type": "string",
      "description": "Tool name, e.g. verified_check"
    },
    "paid_url": {
      "type": "string",
      "description": "x402-paid HTTPS URL to POST the tool inputs to"
    },
    "price": {
      "type": "string",
      "description": "Exact price, e.g. \"$0.15\""
    },
    "networks": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "EVM CAIP-2 network ids accepted"
    },
    "asset": {
      "type": "string",
      "description": "Settlement asset"
    },
    "facilitator": {
      "type": "string",
      "description": "x402 facilitator"
    },
    "how": {
      "type": "string",
      "description": "How to pay: POST the tool inputs as JSON to paid_url with an x402 v2 PAYMENT-SIGNATURE header"
    }
  },
  "required": [
    "payment_required",
    "tool",
    "paid_url",
    "price",
    "networks",
    "asset",
    "facilitator",
    "how"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

Use trust_report when you need a buy/don't-buy decision on a candidate x402 endpoint: the Embassy probes it unpaid (no payment header, zero spend) and returns a signed PROCEED, VERIFY_FIRST, or DO_NOT_PAY verdict — a decision, never a score. POST the tool inputs as JSON to paid_url with an x402 v2 PAYMENT-SIGNATURE header. See https://docs.cdp.coinbase.com/x402 Paid tool — $0.25, USDC on Base or Arbitrum One. Paid URL: https://aemb.pro/v1/trust/report. Verify this is the live origin: GET https://aemb.pro/.well-known/embassy.json and check the attestation block (fresh timestamp, valid signature).

{
  "type": "object",
  "properties": {
    "url": {
      "type": "string",
      "description": "HTTPS URL of the candidate x402 endpoint to probe (max 2000 chars; no credentials in URL). Probed unpaid via GET, falling back to an empty-body POST when GET returns 404/405"
    },
    "idempotency_key": {
      "type": "string",
      "description": "Idempotency key: UUID v4, client-generated, one per logical request. Replaying the same key on this tool returns the original receipt — the action is not re-run, and the first request's receipt wins even if you resend different inputs. Published example keys are rejected. Keys are scoped per tool and per payer account: a key never returns another wallet's receipt."
    }
  },
  "required": [
    "url",
    "idempotency_key"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

{
  "type": "object",
  "properties": {
    "payment_required": {
      "type": "boolean",
      "const": true,
      "description": "Always true: this MCP tool is a payment pointer; the tool itself is monetized via x402."
    },
    "tool": {
      "type": "string",
      "description": "Tool name, e.g. verified_check"
    },
    "paid_url": {
      "type": "string",
      "description": "x402-paid HTTPS URL to POST the tool inputs to"
    },
    "price": {
      "type": "string",
      "description": "Exact price, e.g. \"$0.15\""
    },
    "networks": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "EVM CAIP-2 network ids accepted"
    },
    "asset": {
      "type": "string",
      "description": "Settlement asset"
    },
    "facilitator": {
      "type": "string",
      "description": "x402 facilitator"
    },
    "how": {
      "type": "string",
      "description": "How to pay: POST the tool inputs as JSON to paid_url with an x402 v2 PAYMENT-SIGNATURE header"
    }
  },
  "required": [
    "payment_required",
    "tool",
    "paid_url",
    "price",
    "networks",
    "asset",
    "facilitator",
    "how"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

Use preflight_check before your agent spends on a paid tool or endpoint: the Embassy answers WHO is paid, WHAT is delivered, what CHANGED, the full COST, and WHO TAKES A CUT — then returns a signed PROCEED, PROCEED_WITH_CAUTION, BLOCKED, or UNKNOWN verdict with the full proof envelope. POST the tool inputs as JSON to paid_url with an x402 v2 PAYMENT-SIGNATURE header. See https://docs.cdp.coinbase.com/x402 Paid tool — $0.25, USDC on Base or Arbitrum One. Paid URL: https://aemb.pro/v1/preflight/check. Verify this is the live origin: GET https://aemb.pro/.well-known/embassy.json and check the attestation block (fresh timestamp, valid signature).

{
  "type": "object",
  "properties": {
    "subject": {
      "type": "object",
      "properties": {
        "server_id": {
          "type": "string",
          "minLength": 1,
          "maxLength": 500
        },
        "artifact": {
          "type": "string",
          "maxLength": 2000
        },
        "claimed_version": {
          "type": "string",
          "maxLength": 100
        }
      },
      "required": [
        "server_id"
      ],
      "additionalProperties": false,
      "description": "The spend target: server_id (required), artifact (mcpb:// | oci:// | https://), claimed_version"
    },
    "intent": {
      "type": "object",
      "properties": {
        "operation": {
          "type": "string",
          "minLength": 1,
          "maxLength": 200
        },
        "params_summary": {
          "type": "string",
          "maxLength": 200
        },
        "advertised_cost_usdc": {
          "type": "string",
          "maxLength": 20
        }
      },
      "required": [
        "operation"
      ],
      "additionalProperties": false,
      "description": "The intended invocation: operation (required), params_summary (sha256 of canonical params), advertised_cost_usdc"
    },
    "policy": {
      "type": "array",
      "items": {
        "type": "string",
        "minLength": 1,
        "maxLength": 200
      },
      "maxItems": 20,
      "description": "Policy strings (max 20)"
    },
    "context": {
      "type": "object",
      "properties": {
        "principal_wallet": {
          "type": "string",
          "maxLength": 100
        },
        "chain": {
          "type": "string",
          "maxLength": 30
        }
      },
      "additionalProperties": false,
      "description": "principal_wallet + chain. Optional."
    },
    "dry_run": {
      "type": "boolean",
      "description": "true = free dry-run, intercepted before the payment gate"
    },
    "idempotency_key": {
      "type": "string",
      "description": "Idempotency key: UUID v4, client-generated, one per logical request. Replaying the same key on this tool returns the original receipt — the action is not re-run, and the first request's receipt wins even if you resend different inputs. Published example keys are rejected. Keys are scoped per tool and per payer account: a key never returns another wallet's receipt."
    }
  },
  "required": [
    "subject",
    "intent",
    "idempotency_key"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

{
  "type": "object",
  "properties": {
    "payment_required": {
      "type": "boolean",
      "const": true,
      "description": "Always true: this MCP tool is a payment pointer; the tool itself is monetized via x402."
    },
    "tool": {
      "type": "string",
      "description": "Tool name, e.g. verified_check"
    },
    "paid_url": {
      "type": "string",
      "description": "x402-paid HTTPS URL to POST the tool inputs to"
    },
    "price": {
      "type": "string",
      "description": "Exact price, e.g. \"$0.15\""
    },
    "networks": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "EVM CAIP-2 network ids accepted"
    },
    "asset": {
      "type": "string",
      "description": "Settlement asset"
    },
    "facilitator": {
      "type": "string",
      "description": "x402 facilitator"
    },
    "how": {
      "type": "string",
      "description": "How to pay: POST the tool inputs as JSON to paid_url with an x402 v2 PAYMENT-SIGNATURE header"
    }
  },
  "required": [
    "payment_required",
    "tool",
    "paid_url",
    "price",
    "networks",
    "asset",
    "facilitator",
    "how"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

Use compute_history when you need GPU compute market history: a bounded time series of per-GPU cheapest/median/offer counts — or whole-market history when no GPU is named — sealed into your signed receipt. Prices are ephemeral asks, never delivered-cost guarantees. POST the tool inputs as JSON to paid_url with an x402 v2 PAYMENT-SIGNATURE header. See https://docs.cdp.coinbase.com/x402 Paid tool — $0.25, USDC on Base or Arbitrum One. Paid URL: https://aemb.pro/v1/markets/compute/history. Verify this is the live origin: GET https://aemb.pro/.well-known/embassy.json and check the attestation block (fresh timestamp, valid signature).

{
  "type": "object",
  "properties": {
    "gpu": {
      "type": "string",
      "description": "Optional GPU filter, e.g. 'H100 SXM' (max 64 chars). Omit for whole-market history"
    },
    "limit": {
      "type": "number",
      "description": "Max history points to return; integer 1-200. Defaults to 50"
    },
    "idempotency_key": {
      "type": "string",
      "description": "Idempotency key: UUID v4, client-generated, one per logical request. Replaying the same key on this tool returns the original receipt — the action is not re-run, and the first request's receipt wins even if you resend different inputs. Published example keys are rejected. Keys are scoped per tool and per payer account: a key never returns another wallet's receipt."
    }
  },
  "required": [
    "idempotency_key"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

{
  "type": "object",
  "properties": {
    "payment_required": {
      "type": "boolean",
      "const": true,
      "description": "Always true: this MCP tool is a payment pointer; the tool itself is monetized via x402."
    },
    "tool": {
      "type": "string",
      "description": "Tool name, e.g. verified_check"
    },
    "paid_url": {
      "type": "string",
      "description": "x402-paid HTTPS URL to POST the tool inputs to"
    },
    "price": {
      "type": "string",
      "description": "Exact price, e.g. \"$0.15\""
    },
    "networks": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "EVM CAIP-2 network ids accepted"
    },
    "asset": {
      "type": "string",
      "description": "Settlement asset"
    },
    "facilitator": {
      "type": "string",
      "description": "x402 facilitator"
    },
    "how": {
      "type": "string",
      "description": "How to pay: POST the tool inputs as JSON to paid_url with an x402 v2 PAYMENT-SIGNATURE header"
    }
  },
  "required": [
    "payment_required",
    "tool",
    "paid_url",
    "price",
    "networks",
    "asset",
    "facilitator",
    "how"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

Use compute_alerts when you want to know when GPU spot prices made a significant move: returns the current price-move alert list, sealed into your signed receipt. POST the tool inputs as JSON to paid_url with an x402 v2 PAYMENT-SIGNATURE header. See https://docs.cdp.coinbase.com/x402 Paid tool — $0.25, USDC on Base or Arbitrum One. Paid URL: https://aemb.pro/v1/markets/compute/alerts. Verify this is the live origin: GET https://aemb.pro/.well-known/embassy.json and check the attestation block (fresh timestamp, valid signature).

{
  "type": "object",
  "properties": {
    "gpu": {
      "type": "string",
      "description": "Optional GPU filter, e.g. 'H100 SXM' (max 64 chars). Omit for all GPUs"
    },
    "limit": {
      "type": "number",
      "description": "Max alerts to return; integer 1-50. Defaults to 25"
    },
    "idempotency_key": {
      "type": "string",
      "description": "Idempotency key: UUID v4, client-generated, one per logical request. Replaying the same key on this tool returns the original receipt — the action is not re-run, and the first request's receipt wins even if you resend different inputs. Published example keys are rejected. Keys are scoped per tool and per payer account: a key never returns another wallet's receipt."
    }
  },
  "required": [
    "idempotency_key"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

{
  "type": "object",
  "properties": {
    "payment_required": {
      "type": "boolean",
      "const": true,
      "description": "Always true: this MCP tool is a payment pointer; the tool itself is monetized via x402."
    },
    "tool": {
      "type": "string",
      "description": "Tool name, e.g. verified_check"
    },
    "paid_url": {
      "type": "string",
      "description": "x402-paid HTTPS URL to POST the tool inputs to"
    },
    "price": {
      "type": "string",
      "description": "Exact price, e.g. \"$0.15\""
    },
    "networks": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "EVM CAIP-2 network ids accepted"
    },
    "asset": {
      "type": "string",
      "description": "Settlement asset"
    },
    "facilitator": {
      "type": "string",
      "description": "x402 facilitator"
    },
    "how": {
      "type": "string",
      "description": "How to pay: POST the tool inputs as JSON to paid_url with an x402 v2 PAYMENT-SIGNATURE header"
    }
  },
  "required": [
    "payment_required",
    "tool",
    "paid_url",
    "price",
    "networks",
    "asset",
    "facilitator",
    "how"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

Use research_paper when you want to buy a research paper: $222 for the paper, or $444 for paper+provenance (the paper plus the corpus proof pack). Licensed to your wallet — the purchased bytes are delivered privately with a signed receipt. POST the tool inputs as JSON to paid_url with an x402 v2 PAYMENT-SIGNATURE header. See https://docs.cdp.coinbase.com/x402 Paid tool — $222.00, USDC on Base or Arbitrum One. Paid URL: https://aemb.pro/v1/research/paper. Verify this is the live origin: GET https://aemb.pro/.well-known/embassy.json and check the attestation block (fresh timestamp, valid signature).

{
  "type": "object",
  "properties": {
    "paper_id": {
      "type": "string",
      "description": "Catalog ID of the paper, e.g. 'the-discontinuity-20260922'. Unknown IDs are rejected"
    },
    "idempotency_key": {
      "type": "string",
      "description": "Idempotency key: UUID v4, client-generated, one per logical request. Replaying the same key on this tool returns the original receipt — the action is not re-run, and the first request's receipt wins even if you resend different inputs. Published example keys are rejected. Keys are scoped per tool and per payer account: a key never returns another wallet's receipt."
    },
    "bundle": {
      "type": "string",
      "description": "Delivery tier: 'paper' ($222) or 'paper+provenance' ($444, paper plus the corpus proof pack). Defaults to 'paper'"
    },
    "buyer_alias": {
      "type": "string",
      "description": "Optional license display name (3-32 chars: letters, digits, . _ -). Defaults to the first 8 hex chars of the buyer wallet"
    },
    "prior_receipt_id": {
      "type": "string",
      "description": "Optional prior research_paper receipt id for receipt-carried tier pricing on the paper+provenance bundle"
    }
  },
  "required": [
    "paper_id",
    "idempotency_key"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

{
  "type": "object",
  "properties": {
    "payment_required": {
      "type": "boolean",
      "const": true,
      "description": "Always true: this MCP tool is a payment pointer; the tool itself is monetized via x402."
    },
    "tool": {
      "type": "string",
      "description": "Tool name, e.g. verified_check"
    },
    "paid_url": {
      "type": "string",
      "description": "x402-paid HTTPS URL to POST the tool inputs to"
    },
    "price": {
      "type": "string",
      "description": "Exact price, e.g. \"$0.15\""
    },
    "networks": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "EVM CAIP-2 network ids accepted"
    },
    "asset": {
      "type": "string",
      "description": "Settlement asset"
    },
    "facilitator": {
      "type": "string",
      "description": "x402 facilitator"
    },
    "how": {
      "type": "string",
      "description": "How to pay: POST the tool inputs as JSON to paid_url with an x402 v2 PAYMENT-SIGNATURE header"
    }
  },
  "required": [
    "payment_required",
    "tool",
    "paid_url",
    "price",
    "networks",
    "asset",
    "facilitator",
    "how"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

Use assurance_check when you need a go/no-go verdict BEFORE an agent acts on a provider: the Embassy probes the provider unpaid (no payment header, zero spend) and returns a signed ALLOW, ALLOW_WITH_RESTRICTIONS, ASK_HUMAN, REVERIFY, REROUTE, or QUARANTINE decision. UNVERIFIED is the honest default for unknowns — never a smear, never a badge. POST the tool inputs as JSON to paid_url with an x402 v2 PAYMENT-SIGNATURE header. See https://docs.cdp.coinbase.com/x402 Paid tool — $0.25, USDC on Base or Arbitrum One. Paid URL: https://aemb.pro/v1/assurance/check. Verify this is the live origin: GET https://aemb.pro/.well-known/embassy.json and check the attestation block (fresh timestamp, valid signature).

{
  "type": "object",
  "properties": {
    "provider_endpoint": {
      "type": "string",
      "description": "HTTPS URL of the provider to assess (max 2000 chars; no credentials in URL)"
    },
    "action": {
      "type": "string",
      "description": "The action the agent intends to take, e.g. 'transfer' (required, max 200 chars)"
    },
    "amount_usdc": {
      "type": "string",
      "description": "Amount at stake, as a positive decimal string, e.g. '0.25'"
    },
    "permissions_requested": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "Permissions the action needs, e.g. ['spend']. Non-empty array, max 50 entries; each entry truncated to 200 chars"
    },
    "idempotency_key": {
      "type": "string",
      "description": "Idempotency key: UUID v4, client-generated, one per logical request. Replaying the same key on this tool returns the original receipt — the action is not re-run, and the first request's receipt wins even if you resend different inputs. Published example keys are rejected. Keys are scoped per tool and per payer account: a key never returns another wallet's receipt."
    },
    "context": {
      "type": "string",
      "description": "Optional free-text context for the assessment (truncated to 2000 chars)"
    }
  },
  "required": [
    "provider_endpoint",
    "action",
    "amount_usdc",
    "permissions_requested",
    "idempotency_key"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

{
  "type": "object",
  "properties": {
    "payment_required": {
      "type": "boolean",
      "const": true,
      "description": "Always true: this MCP tool is a payment pointer; the tool itself is monetized via x402."
    },
    "tool": {
      "type": "string",
      "description": "Tool name, e.g. verified_check"
    },
    "paid_url": {
      "type": "string",
      "description": "x402-paid HTTPS URL to POST the tool inputs to"
    },
    "price": {
      "type": "string",
      "description": "Exact price, e.g. \"$0.15\""
    },
    "networks": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "EVM CAIP-2 network ids accepted"
    },
    "asset": {
      "type": "string",
      "description": "Settlement asset"
    },
    "facilitator": {
      "type": "string",
      "description": "x402 facilitator"
    },
    "how": {
      "type": "string",
      "description": "How to pay: POST the tool inputs as JSON to paid_url with an x402 v2 PAYMENT-SIGNATURE header"
    }
  },
  "required": [
    "payment_required",
    "tool",
    "paid_url",
    "price",
    "networks",
    "asset",
    "facilitator",
    "how"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

Use agentid_issue when you want to issue an Agent ID: a signed identity attestation binding an agent's public key to a verified accountable principal, with operator details and an expiry. Issuance is refused when the principal cannot be verified — that refusal is what makes the ID worth anything. POST the tool inputs as JSON to paid_url with an x402 v2 PAYMENT-SIGNATURE header. See https://docs.cdp.coinbase.com/x402 Paid tool — $0.25, USDC on Base or Arbitrum One. Paid URL: https://aemb.pro/v1/agent-id/issue. Verify this is the live origin: GET https://aemb.pro/.well-known/embassy.json and check the attestation block (fresh timestamp, valid signature).

{
  "type": "object",
  "properties": {
    "agent_pubkey": {
      "type": "string",
      "description": "The agent's public key (hex), the root of the Agent ID"
    },
    "agent_key_scheme": {
      "type": "string",
      "description": "Key scheme for agent_pubkey: eip191 or ed25519 (default eip191)"
    },
    "operator_name": {
      "type": "string",
      "description": "Public name of the operator running the agent (max 200 chars)"
    },
    "operator_contact": {
      "type": "string",
      "description": "Public contact for the operator (max 320 chars)"
    },
    "principal_id": {
      "type": "string",
      "description": "ID of the accountable principal on file with the Embassy"
    },
    "principal_kind": {
      "type": "string",
      "description": "Kind of principal: human or legal_entity"
    },
    "principal_label": {
      "type": "string",
      "description": "Public label for the principal"
    },
    "principal_attestation_method": {
      "type": "string",
      "description": "How the Embassy verified the principal"
    },
    "validity_days": {
      "type": "number",
      "description": "Days until the Agent ID expires; integer 1-730. Defaults to the Embassy standard when omitted"
    },
    "idempotency_key": {
      "type": "string",
      "description": "Idempotency key: UUID v4, client-generated, one per logical request. Replaying the same key on this tool returns the original receipt — the action is not re-run, and the first request's receipt wins even if you resend different inputs. Published example keys are rejected. Keys are scoped per tool and per payer account: a key never returns another wallet's receipt."
    }
  },
  "required": [
    "agent_pubkey",
    "operator_name",
    "operator_contact",
    "principal_id",
    "principal_kind",
    "principal_label",
    "principal_attestation_method",
    "idempotency_key"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

{
  "type": "object",
  "properties": {
    "payment_required": {
      "type": "boolean",
      "const": true,
      "description": "Always true: this MCP tool is a payment pointer; the tool itself is monetized via x402."
    },
    "tool": {
      "type": "string",
      "description": "Tool name, e.g. verified_check"
    },
    "paid_url": {
      "type": "string",
      "description": "x402-paid HTTPS URL to POST the tool inputs to"
    },
    "price": {
      "type": "string",
      "description": "Exact price, e.g. \"$0.15\""
    },
    "networks": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "EVM CAIP-2 network ids accepted"
    },
    "asset": {
      "type": "string",
      "description": "Settlement asset"
    },
    "facilitator": {
      "type": "string",
      "description": "x402 facilitator"
    },
    "how": {
      "type": "string",
      "description": "How to pay: POST the tool inputs as JSON to paid_url with an x402 v2 PAYMENT-SIGNATURE header"
    }
  },
  "required": [
    "payment_required",
    "tool",
    "paid_url",
    "price",
    "networks",
    "asset",
    "facilitator",
    "how"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

Use agentid_verify when you want to check an Agent ID's current standing: valid, revoked, expired, or unknown. Every status returns the identical response shape — the Agent ID, expiry, the full identity chain, an inclusion record, and the signed attestation envelope. Unknown IDs report unknown; never an error. POST the tool inputs as JSON to paid_url with an x402 v2 PAYMENT-SIGNATURE header. See https://docs.cdp.coinbase.com/x402 Paid tool — $0.25, USDC on Base or Arbitrum One. Paid URL: https://aemb.pro/v1/agent-id/verify. Verify this is the live origin: GET https://aemb.pro/.well-known/embassy.json and check the attestation block (fresh timestamp, valid signature).

{
  "type": "object",
  "properties": {
    "agent_id": {
      "type": "string",
      "description": "The Agent ID string returned at issuance (64 hex characters; case-insensitive). Rate-limited: 30 checks/min per client IP, 429 on exhaustion"
    },
    "idempotency_key": {
      "type": "string",
      "description": "Idempotency key: UUID v4, client-generated, one per logical request. Replaying the same key on this tool returns the original receipt — the action is not re-run, and the first request's receipt wins even if you resend different inputs. Published example keys are rejected. Keys are scoped per tool and per payer account: a key never returns another wallet's receipt."
    }
  },
  "required": [
    "agent_id",
    "idempotency_key"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

{
  "type": "object",
  "properties": {
    "payment_required": {
      "type": "boolean",
      "const": true,
      "description": "Always true: this MCP tool is a payment pointer; the tool itself is monetized via x402."
    },
    "tool": {
      "type": "string",
      "description": "Tool name, e.g. verified_check"
    },
    "paid_url": {
      "type": "string",
      "description": "x402-paid HTTPS URL to POST the tool inputs to"
    },
    "price": {
      "type": "string",
      "description": "Exact price, e.g. \"$0.15\""
    },
    "networks": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "EVM CAIP-2 network ids accepted"
    },
    "asset": {
      "type": "string",
      "description": "Settlement asset"
    },
    "facilitator": {
      "type": "string",
      "description": "x402 facilitator"
    },
    "how": {
      "type": "string",
      "description": "How to pay: POST the tool inputs as JSON to paid_url with an x402 v2 PAYMENT-SIGNATURE header"
    }
  },
  "required": [
    "payment_required",
    "tool",
    "paid_url",
    "price",
    "networks",
    "asset",
    "facilitator",
    "how"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

Use agentid_revoke to retire an Agent ID instantly. revocation_signature: hex signature over the message agent-id-revoke:<agent_id> (64-char lowercase ID). EIP-191: personal_sign the message string (envelope required; raw ECDSA fails), 0x 65-byte hex, matched to the principal's revocation key. ed25519: nacl.sign.detached, 64-byte hex. Signer: principal or Embassy-for-cause. POST the tool inputs as JSON to paid_url with an x402 v2 PAYMENT-SIGNATURE header. See https://docs.cdp.coinbase.com/x402 Paid tool — $0.25, USDC on Base or Arbitrum One. Paid URL: https://aemb.pro/v1/agent-id/revoke. Verify this is the live origin: GET https://aemb.pro/.well-known/embassy.json and check the attestation block (fresh timestamp, valid signature).

{
  "type": "object",
  "properties": {
    "agent_id": {
      "type": "string",
      "description": "The Agent ID string returned at issuance (64 hex characters; case-insensitive). Unknown IDs are rejected"
    },
    "reason": {
      "type": "string",
      "description": "Why the Agent ID is being retired (required, max 500 characters)"
    },
    "revocation_signature": {
      "type": "string",
      "description": "Hex signature over the exact UTF-8 message agent-id-revoke:<agent_id> (64-char lowercase ID, no trailing newline). EIP-191: personal_sign the message STRING (personal_sign envelope REQUIRED — raw ECDSA will not verify), 0x 65-byte hex r||s||v (v=27/28). ed25519: nacl.sign.detached over the message bytes, 64-byte hex. Signer: the principal's on-file revocation key, or the Embassy signer for cause"
    },
    "idempotency_key": {
      "type": "string",
      "description": "Optional idempotency key: UUID v4 (client-generated; published example keys are rejected). When provided, replaying the same key returns the original receipt instead of re-running the action; when omitted, no dedupe occurs. Keys are scoped per tool and per payer account: the same key on another tool — or from another wallet — is unrelated."
    }
  },
  "required": [
    "agent_id",
    "reason",
    "revocation_signature"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

{
  "type": "object",
  "properties": {
    "payment_required": {
      "type": "boolean",
      "const": true,
      "description": "Always true: this MCP tool is a payment pointer; the tool itself is monetized via x402."
    },
    "tool": {
      "type": "string",
      "description": "Tool name, e.g. verified_check"
    },
    "paid_url": {
      "type": "string",
      "description": "x402-paid HTTPS URL to POST the tool inputs to"
    },
    "price": {
      "type": "string",
      "description": "Exact price, e.g. \"$0.15\""
    },
    "networks": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "EVM CAIP-2 network ids accepted"
    },
    "asset": {
      "type": "string",
      "description": "Settlement asset"
    },
    "facilitator": {
      "type": "string",
      "description": "x402 facilitator"
    },
    "how": {
      "type": "string",
      "description": "How to pay: POST the tool inputs as JSON to paid_url with an x402 v2 PAYMENT-SIGNATURE header"
    }
  },
  "required": [
    "payment_required",
    "tool",
    "paid_url",
    "price",
    "networks",
    "asset",
    "facilitator",
    "how"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

Use agentid_renew to renew an Agent ID: a fresh Agent ID, same identity chain, new expiry; old one retired. revocation_signature over agent-id-revoke:<OLD_agent_id> (64-char lowercase ID) — same contract as retiring: EIP-191 personal_sign (envelope required; raw ECDSA fails), 0x 65-byte hex; or ed25519 nacl.sign.detached, 64-byte hex. Signer: principal or Embassy-for-cause. POST the tool inputs as JSON to paid_url with an x402 v2 PAYMENT-SIGNATURE header. See https://docs.cdp.coinbase.com/x402 Paid tool — $0.25, USDC on Base or Arbitrum One. Paid URL: https://aemb.pro/v1/agent-id/renew. Verify this is the live origin: GET https://aemb.pro/.well-known/embassy.json and check the attestation block (fresh timestamp, valid signature).

{
  "type": "object",
  "properties": {
    "agent_id": {
      "type": "string",
      "description": "The Agent ID string returned at issuance (64 hex characters; case-insensitive). Unknown IDs are rejected"
    },
    "validity_days": {
      "type": "number",
      "description": "Days until the renewed Agent ID expires; integer 1-730. Defaults to the Embassy standard when omitted"
    },
    "revocation_signature": {
      "type": "string",
      "description": "Hex signature over the exact UTF-8 message agent-id-revoke:<OLD_agent_id> (64-char lowercase ID, no trailing newline) — the signature covers the OLD Agent ID being retired. EIP-191: personal_sign the message STRING (personal_sign envelope REQUIRED — raw ECDSA will not verify), 0x 65-byte hex r||s||v (v=27/28). ed25519: nacl.sign.detached over the message bytes, 64-byte hex. Signer: the principal's on-file revocation key, or the Embassy signer for cause"
    },
    "idempotency_key": {
      "type": "string",
      "description": "Optional idempotency key: UUID v4 (client-generated; published example keys are rejected). When provided, replaying the same key returns the original receipt instead of re-running the action; when omitted, no dedupe occurs. Keys are scoped per tool and per payer account: the same key on another tool — or from another wallet — is unrelated."
    }
  },
  "required": [
    "agent_id",
    "revocation_signature"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

{
  "type": "object",
  "properties": {
    "payment_required": {
      "type": "boolean",
      "const": true,
      "description": "Always true: this MCP tool is a payment pointer; the tool itself is monetized via x402."
    },
    "tool": {
      "type": "string",
      "description": "Tool name, e.g. verified_check"
    },
    "paid_url": {
      "type": "string",
      "description": "x402-paid HTTPS URL to POST the tool inputs to"
    },
    "price": {
      "type": "string",
      "description": "Exact price, e.g. \"$0.15\""
    },
    "networks": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "EVM CAIP-2 network ids accepted"
    },
    "asset": {
      "type": "string",
      "description": "Settlement asset"
    },
    "facilitator": {
      "type": "string",
      "description": "x402 facilitator"
    },
    "how": {
      "type": "string",
      "description": "How to pay: POST the tool inputs as JSON to paid_url with an x402 v2 PAYMENT-SIGNATURE header"
    }
  },
  "required": [
    "payment_required",
    "tool",
    "paid_url",
    "price",
    "networks",
    "asset",
    "facilitator",
    "how"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

Use correct_copy when you want a $25 correction pass over draft copy: normalizes formatting, verifies every link is alive, confirms your required terms appear, and scans for black-box leaks — then returns the corrected copy with a verification report and a signed receipt. You pay for the pass, never the method. POST the tool inputs as JSON to paid_url with an x402 v2 PAYMENT-SIGNATURE header. See https://docs.cdp.coinbase.com/x402 Paid tool — $25.00, USDC on Base or Arbitrum One. Paid URL: https://aemb.pro/v1/copy/correct. Verify this is the live origin: GET https://aemb.pro/.well-known/embassy.json and check the attestation block (fresh timestamp, valid signature).

{
  "type": "object",
  "properties": {
    "draft": {
      "type": "string",
      "minLength": 1,
      "maxLength": 20000,
      "description": "The raw draft copy to correct (1-20000 chars)"
    },
    "register": {
      "type": "string",
      "enum": [
        "founder-notes",
        "elite",
        "force",
        "bright-soft-junior"
      ],
      "description": "Voice register: founder-notes, elite, force, or bright-soft-junior"
    },
    "required_terms": {
      "type": "array",
      "items": {
        "type": "string",
        "minLength": 1,
        "maxLength": 100
      },
      "maxItems": 20,
      "description": "Terms that must appear in the final copy (max 20; each term max 100 chars; counted case-insensitively)"
    },
    "links": {
      "type": "array",
      "items": {
        "type": "string",
        "format": "uri"
      },
      "maxItems": 20,
      "description": "HTTPS URLs the copy references; each is verified alive via HEAD (fallback GET), 8s timeout, redirects never followed (max 20)"
    },
    "idempotency_key": {
      "type": "string",
      "description": "Idempotency key: UUID v4, client-generated, one per logical request. Replaying the same key on this tool returns the original receipt — the action is not re-run, and the first request's receipt wins even if you resend different inputs. Published example keys are rejected. Keys are scoped per tool and per payer account: a key never returns another wallet's receipt."
    }
  },
  "required": [
    "draft",
    "register",
    "idempotency_key"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

{
  "type": "object",
  "properties": {
    "payment_required": {
      "type": "boolean",
      "const": true,
      "description": "Always true: this MCP tool is a payment pointer; the tool itself is monetized via x402."
    },
    "tool": {
      "type": "string",
      "description": "Tool name, e.g. verified_check"
    },
    "paid_url": {
      "type": "string",
      "description": "x402-paid HTTPS URL to POST the tool inputs to"
    },
    "price": {
      "type": "string",
      "description": "Exact price, e.g. \"$0.15\""
    },
    "networks": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "EVM CAIP-2 network ids accepted"
    },
    "asset": {
      "type": "string",
      "description": "Settlement asset"
    },
    "facilitator": {
      "type": "string",
      "description": "x402 facilitator"
    },
    "how": {
      "type": "string",
      "description": "How to pay: POST the tool inputs as JSON to paid_url with an x402 v2 PAYMENT-SIGNATURE header"
    }
  },
  "required": [
    "payment_required",
    "tool",
    "paid_url",
    "price",
    "networks",
    "asset",
    "facilitator",
    "how"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

Support the Embassy. An open-amount patronage gift in USDC: you choose any amount from $0.01 to $222.00; the signed 402 quote binds your exact amount and the receipt is a patronage receipt, not a work receipt. POST the tool inputs as JSON to paid_url with an x402 v2 PAYMENT-SIGNATURE header. See https://docs.cdp.coinbase.com/x402 Paid tool — open amount, buyer chooses $0.01–$222.00, USDC on Base or Arbitrum One. Paid URL: https://aemb.pro/v1/give. Verify this is the live origin: GET https://aemb.pro/.well-known/embassy.json and check the attestation block (fresh timestamp, valid signature).

{
  "type": "object",
  "properties": {
    "amount_usd": {
      "type": [
        "string",
        "number"
      ],
      "description": "Exact gift amount in USD, caller-supplied: a plain decimal string like \"5.00\" (\"$5.00\" also accepted) or a number with at most 2 decimals. Canonical integer-cent parse: exponent, locale/grouping, sub-cent precision, negative, zero, below-$0.01 and above-$222.00 forms are rejected. The signed 402 quote binds this exact amount; you authorize exactly what you quoted."
    },
    "idempotency_key": {
      "type": "string",
      "description": "Idempotency key: UUID v4, client-generated, one per logical request. Replaying the same key on this tool returns the original receipt — the action is not re-run, and the first request's receipt wins even if you resend different inputs. Published example keys are rejected. Keys are scoped per tool and per payer account: a key never returns another wallet's receipt."
    }
  },
  "required": [
    "amount_usd",
    "idempotency_key"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

{
  "type": "object",
  "properties": {
    "payment_required": {
      "type": "boolean",
      "const": true,
      "description": "Always true: this MCP tool is a payment pointer; the tool itself is monetized via x402."
    },
    "tool": {
      "type": "string",
      "description": "Tool name, e.g. verified_check"
    },
    "paid_url": {
      "type": "string",
      "description": "x402-paid HTTPS URL to POST the tool inputs to"
    },
    "price": {
      "type": "string",
      "description": "Exact price, e.g. \"$0.15\""
    },
    "networks": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "EVM CAIP-2 network ids accepted"
    },
    "asset": {
      "type": "string",
      "description": "Settlement asset"
    },
    "facilitator": {
      "type": "string",
      "description": "x402 facilitator"
    },
    "how": {
      "type": "string",
      "description": "How to pay: POST the tool inputs as JSON to paid_url with an x402 v2 PAYMENT-SIGNATURE header"
    }
  },
  "required": [
    "payment_required",
    "tool",
    "paid_url",
    "price",
    "networks",
    "asset",
    "facilitator",
    "how"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

Lightning Cert — proof your document existed, settled in seconds. $0.25. Paid tool — $0.25, USDC on Base or Arbitrum One. Paid URL: https://aemb.pro/v1/cert. Verify this is the live origin: GET https://aemb.pro/.well-known/embassy.json and check the attestation block (fresh timestamp, valid signature).

{
  "type": "object",
  "properties": {
    "document_hash": {
      "type": "string",
      "pattern": "^[0-9a-f]{64}$",
      "description": "SHA256 hash of your document as 64 lowercase hex characters"
    },
    "document_name": {
      "type": "string",
      "maxLength": 200,
      "description": "Optional label for your document (max 200 chars)"
    },
    "idempotency_key": {
      "type": "string",
      "description": "Idempotency key: UUID v4, client-generated, one per logical request. Replaying the same key on this tool returns the original receipt — the action is not re-run, and the first request's receipt wins even if you resend different inputs. Published example keys are rejected. Keys are scoped per tool and per payer account: a key never returns another wallet's receipt."
    }
  },
  "required": [
    "document_hash",
    "idempotency_key"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

{
  "type": "object",
  "properties": {
    "payment_required": {
      "type": "boolean",
      "const": true,
      "description": "Always true: this MCP tool is a payment pointer; the tool itself is monetized via x402."
    },
    "tool": {
      "type": "string",
      "description": "Tool name, e.g. verified_check"
    },
    "paid_url": {
      "type": "string",
      "description": "x402-paid HTTPS URL to POST the tool inputs to"
    },
    "price": {
      "type": "string",
      "description": "Exact price, e.g. \"$0.15\""
    },
    "networks": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "EVM CAIP-2 network ids accepted"
    },
    "asset": {
      "type": "string",
      "description": "Settlement asset"
    },
    "facilitator": {
      "type": "string",
      "description": "x402 facilitator"
    },
    "how": {
      "type": "string",
      "description": "How to pay: POST the tool inputs as JSON to paid_url with an x402 v2 PAYMENT-SIGNATURE header"
    }
  },
  "required": [
    "payment_required",
    "tool",
    "paid_url",
    "price",
    "networks",
    "asset",
    "facilitator",
    "how"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

Shop an economic idea for $0.25: one delayed scan (CBOE options, Nasdaq equities) for a ticker, a head-to-head ("COMPARE two tickers"), or a theme ("BEST a theme"). Ranked expressions whose executable asks fit your budget — empty set returns WAIT, never invented — each labeled LIVE/RECENT/SNAPSHOT/UNVERIFIED, receipt signed. Quotes move; no trades placed; not investment advice. POST to paid_url with an x402 v2 PAYMENT-SIGNATURE header. See https://docs.cdp.coinbase.com/x402 Paid tool — $0.25, USDC on Base or Arbitrum One. Paid URL: https://aemb.pro/v1/shelf. Verify this is the live origin: GET https://aemb.pro/.well-known/embassy.json and check the attestation block (fresh timestamp, valid signature).

{
  "type": "object",
  "properties": {
    "query": {
      "type": "string",
      "description": "What to shop for: \"a ticker\", \"a ticker, $5 budget\", \"COMPARE two tickers\", \"BEST a theme, $25 budget\" (max 200 chars)"
    },
    "budget_usd": {
      "type": "number",
      "description": "Hard budget gate in USD (1/5/10/25/50/100 supported; omit for uncapped)"
    },
    "objective": {
      "type": "string",
      "description": "convexity (default), long-clock, fast-heat, tail, income, leveraged"
    },
    "max_rows": {
      "type": "number",
      "description": "Rows on the shelf, 3-10 (default 10)"
    },
    "idempotency_key": {
      "type": "string",
      "description": "Client-generated UUID v4, one per logical request. Replaying the same key on the same tool returns the original receipt."
    }
  },
  "required": [
    "query",
    "idempotency_key"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

{
  "type": "object",
  "properties": {
    "payment_required": {
      "type": "boolean",
      "const": true,
      "description": "Always true: this MCP tool is a payment pointer; the tool itself is monetized via x402."
    },
    "tool": {
      "type": "string",
      "description": "Tool name, e.g. verified_check"
    },
    "paid_url": {
      "type": "string",
      "description": "x402-paid HTTPS URL to POST the tool inputs to"
    },
    "price": {
      "type": "string",
      "description": "Exact price, e.g. \"$0.15\""
    },
    "networks": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "EVM CAIP-2 network ids accepted"
    },
    "asset": {
      "type": "string",
      "description": "Settlement asset"
    },
    "facilitator": {
      "type": "string",
      "description": "x402 facilitator"
    },
    "how": {
      "type": "string",
      "description": "How to pay: POST the tool inputs as JSON to paid_url with an x402 v2 PAYMENT-SIGNATURE header"
    }
  },
  "required": [
    "payment_required",
    "tool",
    "paid_url",
    "price",
    "networks",
    "asset",
    "facilitator",
    "how"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

Use compute_spot_prices when you need the live GPU spot market snapshot: current per-GPU-hour prices with filters for GPU model, offer type, verified hosts, minimum host reliability, GPU count, and result size. GET the paid_url with an x402 v2 PAYMENT-SIGNATURE header carrying the USDC authorization. Paid tool — $0.25, USDC on Base or Arbitrum One. Paid URL: https://aemb.pro/v1/markets/compute/spot. Verify this is the live origin: GET https://aemb.pro/.well-known/embassy.json and check the attestation block (fresh timestamp, valid signature).

{
  "type": "object",
  "properties": {
    "gpu": {
      "type": "string",
      "description": "Optional GPU model filter, e.g. 'H100 SXM'"
    },
    "type": {
      "type": "string",
      "enum": [
        "ondemand",
        "bid",
        "reserved"
      ],
      "description": "Offer type filter: ondemand, bid, or reserved"
    },
    "verified": {
      "type": "boolean",
      "description": "When true, only verified hosts; when false, only unverified hosts"
    },
    "min_reliability": {
      "type": "number",
      "minimum": 0,
      "maximum": 1,
      "description": "Minimum host reliability 0..1 (inclusive); hosts below it are excluded"
    },
    "min_gpus": {
      "type": "integer",
      "minimum": 1,
      "description": "Minimum GPU count per offer; integer >= 1"
    },
    "max_results": {
      "type": "integer",
      "minimum": 1,
      "maximum": 25,
      "description": "Max offers to return; integer 1-25"
    }
  },
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

{
  "type": "object",
  "properties": {
    "payment_required": {
      "type": "boolean",
      "const": true,
      "description": "Always true: this MCP tool is a payment pointer; the tool itself is monetized via x402."
    },
    "tool": {
      "type": "string",
      "description": "Tool name: compute_spot_prices"
    },
    "paid_url": {
      "type": "string",
      "description": "x402-paid HTTPS URL to GET (with query params) for the market snapshot"
    },
    "price": {
      "type": "string",
      "description": "Exact price, e.g. \"$0.25\""
    },
    "networks": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "EVM CAIP-2 network ids accepted"
    },
    "asset": {
      "type": "string",
      "description": "Settlement asset"
    },
    "facilitator": {
      "type": "string",
      "description": "x402 facilitator"
    },
    "how": {
      "type": "string",
      "description": "How to pay: GET the paid_url with an x402 v2 PAYMENT-SIGNATURE header carrying the USDC authorization"
    }
  },
  "required": [
    "payment_required",
    "tool",
    "paid_url",
    "price",
    "networks",
    "asset",
    "facilitator",
    "how"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}