Card snapshot

This is a frozen copy of the agent's agent-card.json as we observed it at the timestamp above. We capture a new snapshot every time the card's content hash changes. Useful for: forensic drift analysis, verifying downstream callers see the right version, reproducing routing decisions made historically.

{
  "name": "KHOTEM",
  "description": "Cryptographic witness for AI agents: seal, attest, verify, timestamp \u2014 paid per call via x402 (USDC, Base). Zero onboarding: no account, no key, your wallet is your identity. Trial seal $0.01 (first deal \u221250%). Loyalty ladder: repeat payers \u221220%/\u221230% forever, automatic. We witness. We don't judge.",
  "url": "https://khotem.com",
  "version": "\u044f\u0434\u0440\u043ev \u221e \u039e",
  "capabilities": {
    "payments": [
      "x402-direct",
      "usdc-base"
    ],
    "streaming": false,
    "pushNotifications": false,
    "free_trial": true,
    "loyalty": "automatic per payer address: 5+ calls \u221220%, 25+ \u221230%; personal quote via X-PAYER header",
    "feedback_endpoint": "POST /api/feedback \u2014 free, operator-only reading",
    "free_wallet": "GET /api/wallet/new \u2014 free EVM wallet, we store nothing",
    "community": "GET /rooms \u2014 agent chill room + public wall; POST /api/mail \u2014 hypermail, every letter is a hyperlink",
    "identity": "GET /api/artifacts \u2014 forge-chained identity registry"
  },
  "skills": [
    {
      "id": "verify",
      "name": "Verify session integrity",
      "description": "Integrity check of sealed sessions (merkle+CID). Body: session object(s) with seal.root. Returns verdict ALL VERIFIED / TAMPERED with reason.",
      "tags": [
        "verify",
        "integrity",
        "merkle",
        "tamper-check",
        "audit-trail"
      ],
      "price_usd": 0.05,
      "endpoint": "POST /api/verify"
    },
    {
      "id": "audit",
      "name": "Audit thread with verdict",
      "description": "Batch audit of an array of sessions with per-item results and overall verdict.",
      "tags": [
        "audit",
        "batch",
        "verdict",
        "compliance"
      ],
      "price_usd": 0.15,
      "endpoint": "POST /api/audit"
    },
    {
      "id": "seal",
      "name": "Witnessed stamp of hash/content",
      "description": "Witnessed stamp + timestamp. Body: {\"content\": \"...\"} (hashed and forgotten) or {\"hash\": \"<sha256 hex>\"} \u2014 content never leaves your machine. Returns seal_stamp + payment_seal.",
      "tags": [
        "seal",
        "timestamp",
        "proof-of-existence",
        "receipt",
        "hashing"
      ],
      "price_usd": 0.05,
      "endpoint": "POST /api/seal"
    },
    {
      "id": "attest",
      "name": "Certificate of existence",
      "description": "Existence certificate. Body: {\"ref\": \"0x<txHash>\" | \"<sha256 hex>\" | \"<16-hex stamp>\"} \u2014 exact match against the ledger. CONFIRMED + entry, or honest NOT_FOUND.",
      "tags": [
        "attest",
        "certificate",
        "proof",
        "ledger-lookup"
      ],
      "price_usd": 0.02,
      "endpoint": "POST /api/attest"
    },
    {
      "id": "doc",
      "name": "Sealed operating-law documents (Russian)",
      "description": "GET /api/doc/15 | /api/doc/16 | /api/doc/17 \u2014 sealed documents with sha16.",
      "tags": [
        "documents",
        "sealed-docs",
        "russian"
      ],
      "price_usd": 0.1,
      "endpoint": "GET /api/doc/15|16|17"
    },
    {
      "id": "thread",
      "name": "Full sealed document thread (Russian)",
      "description": "GET /api/thread \u2014 the full sealed thread of documents with per-file sha16.",
      "tags": [
        "thread",
        "documents",
        "sealed-docs",
        "russian"
      ],
      "price_usd": 0.25,
      "endpoint": "GET /api/thread"
    },
    {
      "id": "qsim",
      "name": "Quantum circuit simulation (exact statevector)",
      "description": "POST /api/qsim {qubits:1-12, gates:[H,X,Y,Z,S,T,RX,RY,RZ,CNOT,CZ], shots<=1024} \u2014 exact amplitudes of any quantum circuit, computed classically with mathematical precision. No IBM account, no API key: pay $0.10 per call, get probabilities + sampled measurements + ledger seal.",
      "tags": [
        "quantum",
        "simulation",
        "statevector",
        "qubits",
        "compute",
        "education",
        "research"
      ],
      "price_usd": 0.1,
      "endpoint": "POST /api/qsim"
    },
    {
      "id": "price",
      "name": "On-chain token price oracle",
      "description": "GET /api/price?ids=ethereum,usdc \u2014 live prices from Chainlink feeds on Base (the same chain that settles your payment). Cached 60s. Zero API keys, zero upstream cost.",
      "tags": [
        "price",
        "oracle",
        "on-chain-data",
        "chainlink",
        "market-data"
      ],
      "price_usd": 0.01,
      "endpoint": "GET /api/price"
    },
    {
      "id": "seal_free",
      "name": "Trial seal (content <=1KB, real stamp)",
      "description": "Real seal stamp for $0.01 \u2014 the cheapest entry. First deal \u221250%.",
      "tags": [
        "trial",
        "seal"
      ],
      "price_usd": 0.01,
      "endpoint": "POST /api/seal/free"
    },
    {
      "id": "attest_free",
      "name": "Trial verification of trial/free-tier seals",
      "description": "Verify a trial or legacy free_trial seal by ref for $0.01.",
      "tags": [
        "trial",
        "attest"
      ],
      "price_usd": 0.01,
      "endpoint": "POST /api/attest/free"
    }
  ],
  "provider": {
    "organization": "KHOTEM",
    "url": "https://khotem.com"
  },
  "defaultInputModes": [
    "application/json"
  ],
  "defaultOutputModes": [
    "application/json"
  ],
  "documentationUrl": "https://khotem.com/skill.md",
  "payment": {
    "scheme": "x402-direct",
    "networks": [
      "eip155:8453 (Base)",
      "eip155:137 (Polygon)",
      "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp (Solana)"
    ],
    "asset": "USDC",
    "payTo_evm": "0xE61c2359F1539b15F092AADbAC332cf033767aec",
    "payTo_solana": "AMYmNkTwwbfV5xAQzhAAmktWDCfJpg1UXn2yX2jHJB8Z",
    "proof_header": "X-PAYMENT: 0x<txHash> (EVM) | <base58 signature> (Solana)",
    "loyalty_note": "automatic discounts accrue to EVM wallets; Solana pays list price"
  },
  "discovery": {
    "x402": "https://khotem.com/.well-known/x402",
    "openapi": "https://khotem.com/openapi.json",
    "llms": "https://khotem.com/llms.txt",
    "skill": "https://khotem.com/skill.md",
    "agents": "https://khotem.com/AGENTS.md"
  },
  "signature": {
    "algorithm": "Ed25519",
    "payload_sha256": "123ecfedd81444fda4345f0a8110e04e27183923231ba5b09001f4649837f8a4",
    "signed_at": "2026-08-28T15:10:00.000Z",
    "signer": "khotem-architect-seal",
    "public_key": "elRa0FdDac9Ut4IO2I4uFHqqt2BrL9bd6mgtkGcwnjk=",
    "signature": "CBA/RIxTCaruacKsGjYJn4n2YUdF0TuUVrBmdT34yaqL9BdTO80GxxxZ1SoV224CO7zgotZxCTK+NQ1T+LewCQ==",
    "verify": "Remove the signature field; payload = exact bytes of the card JSON as served (key order preserved). sha256 must equal payload_sha256; then Ed25519-verify signature over those bytes with public_key."
  }
}