{
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  "id": 30959,
  "slug": "30959",
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  "description": "Notarize AI output: a signed Ed25519 attestation of the model response plus sha256 content hash, receipt token, and Merkle anchor status for one AI inference — a cryptographic receipt for inference that lets you prove an AI said X and verify model output authenticity, checkable free by anyone, anytime.",
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        "properties": {
          "algorithm": {
            "type": "string"
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          "anchor": {
            "properties": {
              "status": {
                "type": "string"
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            "type": "object"
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          "attestation_id": {
            "type": "string"
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          "client_timestamp": {
            "type": [
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              "null"
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          },
          "content_hash": {
            "description": "sha256 hex over canonical {prompt, response, model_id, client_timestamp}",
            "type": "string"
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          "model_id": {
            "type": "string"
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            "description": "false by default: prompt/response/metadata are not persisted",
            "type": "boolean"
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            "type": "string"
          },
          "receipt_url": {
            "type": "string"
          },
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            "description": "base64 Ed25519 signature by the notary key",
            "type": "string"
          },
          "signer_pubkey": {
            "description": "base64 raw Ed25519 public key",
            "type": "string"
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        "type": "object"
      },
      "type": {
        "type": "string"
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            "model_id": "openai/gpt-5",
            "prompt": "What is 2+2?",
            "response": "4"
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          "bodyType": "json",
          "method": "POST",
          "type": "http"
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            "anchor": {
              "status": "pending"
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            "attestation_id": "att_0123456789abcdef01234567",
            "client_timestamp": "2026-07-03T12:00:00Z",
            "content_hash": "9f86d081884c7d659a2feaa0c55ad015a3bf4f1b2b0b822cd15d6c15b0f00a08",
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            "receipt_url": "https://notary.forgemesh.io/api/receipt/att_0123456789abcdef01234567",
            "signature": "base64-ed25519-signature",
            "signer_pubkey": "base64-ed25519-public-key"
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        "properties": {
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            "additionalProperties": false,
            "properties": {
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                  "client_timestamp": {
                    "description": "ISO-8601 time the inference ran (optional; included in the content hash)",
                    "type": "string"
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                  "metadata": {
                    "description": "Optional caller metadata, <= 4 KB — accepted but NOT persisted or hashed (reserved for future opt-in retention)",
                    "type": "object"
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                  "model_id": {
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                    "type": "string"
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                  "response": {
                    "description": "Exact model output being notarized",
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                  "payload_stored": {
                    "description": "false by default: prompt/response/metadata are not persisted",
                    "type": "boolean"
                  },
                  "receipt_token": {
                    "description": "Private receipt token; payload is not stored by default",
                    "type": "string"
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                  "receipt_url": {
                    "type": "string"
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                  "signature": {
                    "description": "base64 Ed25519 signature by the notary key",
                    "type": "string"
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                  "signer_pubkey": {
                    "description": "base64 raw Ed25519 public key",
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  "quality": {
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    "uniquePayers30d": 9,
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              "prompt": "What is 2+2?",
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                "status": "pending"
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              "notarized_at": "2026-07-03T12:00:01.000Z",
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              "receipt_url": "https://notary.forgemesh.io/api/receipt/att_0123456789abcdef01234567",
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                    "client_timestamp": {
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                      "description": "Exact prompt/input sent to the model",
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                      "description": "Exact model output being notarized",
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                      "type": "string"
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                    "payload_stored": {
                      "description": "false by default: prompt/response/metadata are not persisted",
                      "type": "boolean"
                    },
                    "receipt_token": {
                      "description": "Private receipt token; payload is not stored by default",
                      "type": "string"
                    },
                    "receipt_url": {
                      "type": "string"
                    },
                    "signature": {
                      "description": "base64 Ed25519 signature by the notary key",
                      "type": "string"
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                      "description": "base64 raw Ed25519 public key",
                      "type": "string"
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    "submitted_at": "2026-10-14T01:15:01.050Z"
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      "content_hash": "string",
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      "signature": "string",
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}