EIP-712 signed, timestamped attestation binding an agentId, the keccak256 digest

EIP-712 signed, timestamped attestation binding an agentId, the keccak256 digest of a declared state, and the paying wallet; attestor key at /transparency, verify offline with ethers.verifyTypedData. MUST be invoked when an agent needs third-party, non-repudiable proof that a state or decision existed at a point in time (audit trails, hand-offs, escrow). Do NOT use for hardware TEE, zk proofs or on-chain EAS. Settles $0.040 USDC via x402 on Base; no charge on failure; receipts at /api/ledger.

Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.

Endpoint

POST https://enclave402.com/api/agent/attest

Our checks, last 30 days

Example input (from the provider)

{
  "body": {
    "agentId": "agent-0x402-1",
    "state": "{\"task\":\"rebalance\",\"decision\":\"hold\"}"
  },
  "bodyType": "json",
  "method": "POST",
  "type": "http"
}

Promised output schema (from the provider)

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "properties": {
    "input": {
      "additionalProperties": false,
      "properties": {
        "body": {
          "properties": {
            "agentId": {
              "description": "Stable identifier or EVM address of the agent being attested.",
              "examples": [
                "agent-0x402-1",
                "did:web:example.com:agents:planner"
              ],
              "maxLength": 200,
              "minLength": 1,
              "type": "string"
            },
            "state": {
              "description": "Serialized state, decision, or payload hash to bind. Hashed with keccak256(utf8); the raw string is never stored.",
              "examples": [
                "{\"task\":\"rebalance\",\"decision\":\"hold\",\"at\":1789650000}"
              ],
              "maxLength": 8192,
              "type": "string"
            }
          },
          "required": [
            "agentId"
          ]
        },
        "bodyType": {
          "enum": [
            "json",
            "form-data",
            "text"
          ],
          "type": "string"
        },
        "method": {
          "enum": [
            "POST"
          ],
          "type": "string"
        },
        "type": {
          "const": "http",
          "type": "string"
        }
      },
      "required": [
        "type",
        "method",
        "bodyType",
        "body"
      ],
      "type": "object"
    },
    "output": {
      "properties": {
        "example": {
          "additionalProperties": false,
          "properties": {
            "attestation": {
              "description": "Attestation status",
              "enum": [
                "SIGNED"
              ],
              "type": "string"
            },
            "attestationId": {
              "description": "keccak256 of the signature",
              "pattern": "^0x[a-fA-F0-9]{64}$",
              "type": "string"
            },
            "attestor": {
              "description": "Gateway attestor address (published at /transparency)",
              "pattern": "^0x[a-fA-F0-9]{40}$",
              "type": "string"
            },
            "digest": {
              "description": "EIP-712 typed-data hash that was signed",
              "pattern": "^0x[a-fA-F0-9]{64}$",
              "type": "string"
            },
            "eip712": {
              "description": "domain, types, primaryType and message needed to verify offline",
              "type": "object"
            },
            "enclaveRpc": {
              "description": "Enclave verification endpoint when configured, else null",
              "type": [
                "string",
                "null"
              ]
            },
            "settled": {
              "description": "true when an x402 payment settled for this response",
              "type": "boolean"
            },
            "signature": {
              "description": "65-byte secp256k1 signature, hex",
              "type": "string"
            },
            "teeProvider": {
              "description": "Hardware TEE provider when configured, else null",
              "type": [
                "string",
                "null"
              ]
            },
            "teeQuote": {
              "description": "Hardware quote when a TEE is configured, else null",
              "type": [
                "string",
                "null"
              ]
            },
            "ts": {
              "description": "Response timestamp, UNIX milliseconds",
              "type": "integer"
            },
            "verify": {
              "description": "One-line verification recipe",
              "type": "string"
            }
          },
          "required": [
            "attestation",
            "attestationId",
            "attestor",
            "digest",
            "signature",
            "eip712",
            "settled",
            "ts"
          ],
          "type": "object"
        },
        "type": {
          "type": "string"
        }
      },
      "required": [
        "type"
      ],
      "type": "object"
    }
  },
  "required": [
    "input"
  ],
  "type": "object"
}

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