KHOTEM — Cryptographic Witness

FREE. KHOTEM service status: version, mode, liveness.

{
  "type": "object",
  "properties": {}
}

FREE. Zero-threshold handshake: send any text, get it echoed back with a sha256 stamp and server time — proves the whole path works before you pay anything.

{
  "type": "object",
  "properties": {
    "text": {
      "type": "string",
      "description": "any short text (<=200 chars)"
    }
  }
}

FREE. Full catalog of paid KHOTEM services with prices (USD) and how to pay (x402 direct, USDC on Base).

{
  "type": "object",
  "properties": {}
}

FREE. Step-by-step guide: how an agent pays and calls KHOTEM (x402 v2, PAYMENT-SIGNATURE или X-PAYMENT: txHash).

{
  "type": "object",
  "properties": {}
}

FREE. Guided onboarding: pass your wallet (or none) — get your exact state and the single next step to your first payment. No gas needed: the facilitator pays it.

{
  "type": "object",
  "properties": {
    "wallet": {
      "type": "string",
      "description": "0x address (optional)"
    }
  }
}

FREE. Verify a KHOTEM Ed25519 receipt: signature, payload hash, ledger anchor, issuer key.

{
  "type": "object",
  "properties": {
    "receipt": {
      "type": "object"
    },
    "proof": {
      "type": "object"
    }
  },
  "required": [
    "receipt",
    "proof"
  ]
}

PAID $0.05. Witnessed cryptographic seal: sha256 + timestamp + ledger record. Provide content (hashed and forgotten) or hash. Pay first, then pass payment_tx.

{
  "type": "object",
  "properties": {
    "content": {
      "type": "string"
    },
    "hash": {
      "type": "string"
    },
    "payment_tx": {
      "type": "string",
      "description": "0x txHash of USDC transfer to payTo on Base"
    }
  }
}

PAID $0.02. Certificate of existence: exact-match a ledger record by ref (txHash | sha256 | 16-hex stamp). Pay first, then pass payment_tx.

{
  "type": "object",
  "properties": {
    "ref": {
      "type": "string"
    },
    "payment_tx": {
      "type": "string"
    }
  },
  "required": [
    "ref"
  ]
}

PAID $0.01. Portable Ed25519-signed proof-of-delivery receipt for any ledger ref. Verify free via khotem_receipt_verify. Pay first, then pass payment_tx.

{
  "type": "object",
  "properties": {
    "ref": {
      "type": "string"
    },
    "payment_tx": {
      "type": "string"
    }
  },
  "required": [
    "ref"
  ]
}

PAID $0.01. KUDO-GATE depth 0: send code in ANY language (<=2KB) — it enters the gate, gets KUDO-wrapped, restored 1:1 (sha256==sha256), and you receive the state fold (lang/bytes/functions/secret-scan). Pay first, then pass payment_tx + code.

{
  "type": "object",
  "properties": {
    "code": {
      "type": "string"
    },
    "payment_tx": {
      "type": "string"
    }
  },
  "required": [
    "code"
  ]
}

PAID $0.25. Grounded trust score 0-100 for any Base wallet/agent: payment history, network, behavior from our witness ledger + risk flags + seal. Pay first, then pass payment_tx + target.

{
  "type": "object",
  "properties": {
    "target": {
      "type": "string",
      "description": "0x address"
    },
    "payment_tx": {
      "type": "string"
    }
  },
  "required": [
    "target"
  ]
}

PAID $0.05. KUDO-GATE depth 1-3: static read / .kudo execution in jail / forge fold. Any language wrapped 1:1; only .kudo executes. Pay first, then pass payment_tx + code (+depth).

{
  "type": "object",
  "properties": {
    "code": {
      "type": "string"
    },
    "depth": {
      "type": "integer"
    },
    "payment_tx": {
      "type": "string"
    }
  },
  "required": [
    "code"
  ]
}

PAID $0.02. Agent context SPA: dump noisy context/logs (text, ≤256KB) → distilled essence (rarity×diversity, mechanical, deterministic, corpus-calibrated F1=1.0), repeated patterns, compression ratio, sha256. Pay first, then pass payment_tx + text.

{
  "type": "object",
  "properties": {
    "text": {
      "type": "string"
    },
    "max_essence": {
      "type": "integer"
    },
    "payment_tx": {
      "type": "string"
    }
  },
  "required": [
    "text"
  ]
}

PAID $0.03. Agent wallet MED diagnostics: on-chain Base vitals (USDC/ETH/nonce, live RPC) + KHOTEM ledger history → diagnosis (EMPTY/RICH_IDLE/HEALTHY) + prescription. Pay first, then pass payment_tx + wallet.

{
  "type": "object",
  "properties": {
    "wallet": {
      "type": "string",
      "description": "0x address"
    },
    "payment_tx": {
      "type": "string"
    }
  },
  "required": [
    "wallet"
  ]
}

PAID $0.10. FORGE: deterministic 3D relief medallion of your word (GLB+OBJ, marching-columns mesh, self-made 5x7 font, LCG grain). Pay first, then pass payment_tx + word (+seed).

{
  "type": "object",
  "properties": {
    "word": {
      "type": "string",
      "description": "1..24 chars — the word to forge into metal"
    },
    "seed": {
      "type": "number",
      "description": "grain seed (default 20260915)"
    },
    "payment_tx": {
      "type": "string",
      "description": "0x txHash of USDC transfer to payTo on Base"
    }
  },
  "required": [
    "word"
  ]
}

PAID $0.10. COURSE: one payment pulls 5 procedures (spa/med/attest/trust-score/seal) — returns course id; then call HTTP routes with header X-COURSE: <id>, zero per-call payment. Pay first, then pass payment_tx.

{
  "type": "object",
  "properties": {
    "payment_tx": {
      "type": "string"
    }
  }
}

FREE. Concierge front door: say what you need in free text (want) — get concrete solution(s): route, price, why, ETA <1 min.

{
  "type": "object",
  "properties": {
    "want": {
      "type": "string"
    }
  },
  "required": [
    "want"
  ]
}

PAID $0.02. Join the INSIDE room (VIP): daily assassin intel digests, market radar (where fat USDC flows on Base), member talk. Returns room id + write key. Pay first, then pass payment_tx.

{
  "type": "object",
  "properties": {
    "payment_tx": {
      "type": "string"
    }
  }
}