notary.forgemesh.io

Live 402 challenge

Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.

{
  "error": "Payment required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x814EfE784709f5bF8dF47735D87602B01030e5D2",
      "scheme": "exact",
      "network": "base",
      "mimeType": "application/json",
      "resource": "https://notary.forgemesh.io/api/notarize",
      "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.",
      "maxAmountRequired": "1000",
      "maxTimeoutSeconds": 300
    }
  ],
  "extensions": {
    "sample": {
      "notice": "Free sample showing notarization receipt structure. Pay to create a real cryptographic attestation of your AI interaction.",
      "sample": true,
      "product": "notarization",
      "features": [
        "Cryptographic proof of AI interaction content and timing",
        "Ed25519 signatures for tamper detection",
        "Batch Merkle tree anchoring for ordering proof",
        "Free verification via POST /api/verify",
        "Receipt retrieval via GET /api/receipt/:id"
      ],
      "withheld": [
        "actual notarization",
        "real attestation_id",
        "cryptographic signature"
      ],
      "receipt_structure": {
        "anchor": {
          "status": "pending → sealed after batch anchoring"
        },
        "model_id": "[from your request]",
        "algorithm": "ed25519",
        "signature": "ed25519 signature over the attestation document",
        "receipt_url": "[url to retrieve receipt]",
        "content_hash": "sha256 of {prompt, response, model_id, client_timestamp}",
        "notarized_at": "[server timestamp]",
        "receipt_token": "[one-time token for payload retrieval]",
        "signer_pubkey": "[server public key]",
        "attestation_id": "att_[generated]",
        "client_timestamp": "[optional, from your request]"
      }
    }
  },
  "x402Version": 1
}

Accepts

The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.

[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x814EfE784709f5bF8dF47735D87602B01030e5D2",
    "amount": "1000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  }
]

Provenance

Seen in the source catalog

2026-08-05 09:27Z

Last indexed by Roundhouse

2026-09-24 16:45Z

Last enriched (probe, favicon, geo)

2026-09-17 00:15Z

x402 version

2

Max timeout

300s

Liveness probe

HTTP 402