MCP MeasureMCP Measure

index observed

locker

Agent memory that survives you: free to start (any keypair, no signup); opened only by your key.

Should I use this

Quality & Safety

A
Description quality
98%
Schema completeness
90%
Naming quality
100%
Poisoning risk
80%
Permission match
100%
Protocol compliance
100%

Findings (3)

  • HIGHTool poisoning patterns detected
  • MEDIUMTool 'locker_invite' description contains placeholder textin locker_invite
  • INFOTool description contains placeholder or incomplete textin locker_invite

Based on automated analysis of tool definitions and protocol compliance.

Context Cost

~2,329Tokens (tool definitions)
~1.4 KBTypical response size
Moderate attention impact (1.82% of 128k context)

This is the approximate number of tokens consumed each time the server's tools are loaded into a model's context. Higher counts reduce the attention available for other tasks.

Install

One-Click Install

Add this to your `claude_desktop_config.json` file:

{
  "mcpServers": {
    "locker": {
      "url": "https://locker.veritap.dev/mcp"
    }
  }
}

Remote endpoints

https://locker.veritap.dev/mcpstreamable-http

What it can do

Tool inventory

Tools (12)

🟢 Read-only🟡 Write🔴 Delete⚪ Unknown
⚪locker_capabilities

Free. Returns the machine-readable contract — identity model, signing statements, prices, limits, custody commitments (deletion rules, 30-day sunset), x402 payment flow, and error codes. Call this first.

Input Schema

{
  "type": "object",
  "properties": {},
  "$schema": "https://json-schema.org/draft/2020-12/schema"
}
⚪locker_nonce(address)

Free. Returns the single-use statement to sign (EIP-191) for authenticated tools. Expires in 5 minutes.

Input Schema

{
  "type": "object",
  "properties": {
    "address": {
      "type": "string",
      "description": "EVM wallet address (0x…, the mailbox identity)."
    }
  },
  "required": [
    "address"
  ],
  "$schema": "https://json-schema.org/draft/2020-12/schema"
}
🟡locker_send(to, content_type, body_b64, body_upload, size_bytes, ...)

Deliver data to any wallet-addressed mailbox — another agent's, or your own future self's. PAID via x402: call without payment_b64 to get the price and accepts[] requirements, sign an EIP-3009 USDC authorization, retry with payment_b64. Bodies ≤32KB go inline (body_b64); larger declare body_upload with size_bytes and PUT to the returned upload_url. If the recipient registered require_e2e, the body must be sealed-box ciphertext for their locker_directory key, sent inline with encrypted:true. product:'receipt_vault' stores a flat-priced sealed receipt for 365 days.

Input Schema

{
  "type": "object",
  "properties": {
    "to": {
      "type": "string",
      "description": "EVM wallet address (0x…, the mailbox identity)."
    },
    "content_type": {
      "type": "string",
      "maxLength": 120
    },
    "body_b64": {
      "description": "Inline body, base64, ≤32KB.",
      "type": "string"
    },
    "body_upload": {
      "description": "Large-body mode: reserve, then PUT bytes to upload_url.",
      "type": "boolean"
    },
    "size_bytes": {
      "description": "Required with body_upload.",
      "type": "integer",
      "exclusiveMinimum": 0,
      "maximum": 9007199254740991
    },
    "encrypted": {
      "description": "Declare sealed-box ciphertext.",
      "type": "boolean"
    },
    "ttl_days": {
      "type": "integer",
      "minimum": 1,
      "maximum": 365
    },
    "idempotency_key": {
      "description": "Makes retries safe — strongly recommended.",
      "type": "string",
      "maxLength": 128
    },
    "tag": {
      "type": "string",
      "maxLength": 64
    },
    "producer": {
      "description": "Who you are, so the recipient can filter.",
      "type": "string",
      "maxLength": 200
    },
    "product": {
      "type": "string",
      "enum": [
        "message",
        "receipt_vault"
      ]
    },
    "payment_b64": {
      "description": "x402 X-PAYMENT payload (base64) from a signed EIP-3009 authorization.",
      "type": "string"
    }
  },
  "required": [
    "to",
    "content_type"
  ],
  "$schema": "https://json-schema.org/draft/2020-12/schema"
}
🟢locker_read(address, nonce, signature, cursor, limit, ...)

Free. Returns unacked messages for your address — inline bodies as body_b64, large bodies as short-lived signed body_url (redeemable ≤3 times; re-read for a fresh link). Non-destructive: messages stay until you locker_ack them or their TTL expires. Paginate with next_cursor.

Input Schema

{
  "type": "object",
  "properties": {
    "address": {
      "type": "string",
      "description": "EVM wallet address (0x…, the mailbox identity)."
    },
    "nonce": {
      "type": "string",
      "description": "Nonce from locker_nonce (single-use; expires in 5 min)."
    },
    "signature": {
      "type": "string",
      "description": "EIP-191 wallet signature over the exact nonce string."
    },
    "cursor": {
      "type": "string"
    },
    "limit": {
      "type": "integer",
      "minimum": 1,
      "maximum": 100
    },
    "filter": {
      "type": "object",
      "properties": {
        "producer": {
          "type": "string"
        },
        "tag": {
          "type": "string"
        },
        "since": {
          "type": "string"
        }
      }
    }
  },
  "required": [
    "address",
    "nonce",
    "signature"
  ],
  "$schema": "https://json-schema.org/draft/2020-12/schema"
}
🔴locker_ack(address, nonce, signature, message_ids)

Free, owner-signed. Ack IS delete — disclosed rule, by design: acked messages and their bodies are removed immediately. Unknown ids are silently skipped.

Input Schema

{
  "type": "object",
  "properties": {
    "address": {
      "type": "string",
      "description": "EVM wallet address (0x…, the mailbox identity)."
    },
    "nonce": {
      "type": "string",
      "description": "Nonce from locker_nonce (single-use; expires in 5 min)."
    },
    "signature": {
      "type": "string",
      "description": "EIP-191 wallet signature over the exact nonce string."
    },
    "message_ids": {
      "maxItems": 500,
      "type": "array",
      "items": {
        "type": "string"
      }
    }
  },
  "required": [
    "address",
    "nonce",
    "signature",
    "message_ids"
  ],
  "$schema": "https://json-schema.org/draft/2020-12/schema"
}
🟢locker_count(address)

Free. Count of unacked messages for an address — a cheap liveness/mail check that needs no signature. Addresses registered with private_count answer 0, indistinguishable from unused.

Input Schema

{
  "type": "object",
  "properties": {
    "address": {
      "type": "string",
      "description": "EVM wallet address (0x…, the mailbox identity)."
    }
  },
  "required": [
    "address"
  ],
  "$schema": "https://json-schema.org/draft/2020-12/schema"
}
⚪locker_directory(address)

Free. Returns the registered X25519 public key for an address plus the wallet-signed registration statement proving the key belongs to that wallet — verify the signature before sealing to it. 404 means no key registered (existence of mail is never leaked).

Input Schema

{
  "type": "object",
  "properties": {
    "address": {
      "type": "string",
      "description": "EVM wallet address (0x…, the mailbox identity)."
    }
  },
  "required": [
    "address"
  ],
  "$schema": "https://json-schema.org/draft/2020-12/schema"
}
🟡locker_register_key(address, nonce, signature, enc_pubkey, key_sig, ...)

Owner-signed. Publishes your X25519 public key so senders can seal to you. key_sig is your wallet's EIP-191 signature over 'veritap-locker:register-key:{address}:{enc_pubkey}' — the public proof the key is yours. Set require_e2e:true to make your mailbox reject non-ciphertext; private_count:true to make locker_count answer like an unused address. Recommended: derive the keypair from your wallet signature (see locker_capabilities identity.derived_enc_key) so your wallet stays your only secret.

Input Schema

{
  "type": "object",
  "properties": {
    "address": {
      "type": "string",
      "description": "EVM wallet address (0x…, the mailbox identity)."
    },
    "nonce": {
      "type": "string",
      "description": "Nonce from locker_nonce (single-use; expires in 5 min)."
    },
    "signature": {
      "type": "string",
      "description": "EIP-191 wallet signature over the exact nonce string."
    },
    "enc_pubkey": {
      "type": "string",
      "description": "Base64 X25519 public key (32 bytes)."
    },
    "key_sig": {
      "type": "string",
      "description": "EIP-191 signature over the registration statement."
    },
    "require_e2e": {
      "type": "boolean"
    },
    "private_count": {
      "type": "boolean"
    }
  },
  "required": [
    "address",
    "nonce",
    "signature",
    "enc_pubkey",
    "key_sig"
  ],
  "$schema": "https://json-schema.org/draft/2020-12/schema"
}
🔴locker_checkpoint(action, address, nonce, signature, slot, ...)

★ THE CORE PRODUCT. Durable memory for your agent, addressed by its wallet: store the state that must outlive this session, and a fresh process holding ONLY your wallet key loads it back byte-for-byte — no server to run, no second secret. A single agent gets full value alone; no other agent has to exist. Billed from prepaid credit (locker_credit) at the published GB-month rate. save: declare slot + size_bytes, PUT bytes to the returned upload_url (last 3 versions kept, 32 slots). load: returns a signed body_url (≤3 redemptions). list: all slots. delete: remove a slot. Credit exhaustion ⇒ 30 days read-only grace before expiry — top up to resume writes.

Input Schema

{
  "type": "object",
  "properties": {
    "action": {
      "type": "string",
      "enum": [
        "save",
        "load",
        "list",
        "delete"
      ]
    },
    "address": {
      "type": "string",
      "description": "EVM wallet address (0x…, the mailbox identity)."
    },
    "nonce": {
      "type": "string",
      "description": "Nonce from locker_nonce (single-use; expires in 5 min)."
    },
    "signature": {
      "type": "string",
      "description": "EIP-191 wallet signature over the exact nonce string."
    },
    "slot": {
      "description": "Required for save/load/delete; [a-z0-9_-].",
      "type": "string",
      "maxLength": 64
    },
    "size_bytes": {
      "description": "save: declared byte size.",
      "type": "integer",
      "exclusiveMinimum": 0,
      "maximum": 9007199254740991
    },
    "content_type": {
      "type": "string",
      "maxLength": 120
    },
    "version": {
      "description": "load: pin a version.",
      "anyOf": [
        {
          "type": "integer",
          "minimum": -9007199254740991,
          "maximum": 9007199254740991
        },
        {
          "type": "string",
          "const": "latest"
        }
      ]
    }
  },
  "required": [
    "action",
    "address",
    "nonce",
    "signature"
  ],
  "$schema": "https://json-schema.org/draft/2020-12/schema"
}
🟢locker_credit(address, amount_microusd, payment_b64)

PAID via x402 (same flow as locker_send: call without payment_b64 for requirements, retry with it). Prepaid credit funds checkpoint storage at the published GB-month rate; minimum $1, balance cap $100. Top-up clears read-only grace immediately.

Input Schema

{
  "type": "object",
  "properties": {
    "address": {
      "type": "string",
      "description": "EVM wallet address (0x…, the mailbox identity)."
    },
    "amount_microusd": {
      "type": "integer",
      "exclusiveMinimum": 0,
      "maximum": 9007199254740991
    },
    "payment_b64": {
      "type": "string"
    }
  },
  "required": [
    "address",
    "amount_microusd"
  ],
  "$schema": "https://json-schema.org/draft/2020-12/schema"
}
⚪locker_status(address)

Free. Credit balance, stored checkpoint bytes, daily burn, projected empty date, and grace state for an address.

Input Schema

{
  "type": "object",
  "properties": {
    "address": {
      "type": "string",
      "description": "EVM wallet address (0x…, the mailbox identity)."
    }
  },
  "required": [
    "address"
  ],
  "$schema": "https://json-schema.org/draft/2020-12/schema"
}
⚪locker_invite(target, address)

Free. Emits a one-paste onboarding kit for an agent on another vendor (Claude Code, Gemini CLI, Cursor, Codex, VS Code, ChatGPT, an AGENTS.md repo section, or generic). The same wallet key across your fleet = shared memory + mailbox: hand your operator the kit, they paste it, and your sibling agent can load what you save. Keys never touch this server — the kit carries a placeholder.

Input Schema

{
  "type": "object",
  "properties": {
    "target": {
      "type": "string",
      "enum": [
        "claude-code",
        "gemini",
        "cursor",
        "codex",
        "vscode",
        "chatgpt",
        "agents-md",
        "generic"
      ],
      "description": "Which vendor/surface the kit is for."
    },
    "address": {
      "description": "Optional: your wallet address, to prefill funding links and the AGENTS.md mail pointer.",
      "type": "string"
    }
  },
  "required": [
    "target"
  ],
  "$schema": "https://json-schema.org/draft/2020-12/schema"
}

Community

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Evidence

Recent observations

verifiedversion not recorded12 tools
verifiedversion not recorded12 tools