$0.001
per call · USD Coin on Base
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.
Endpoint
POST https://notary.forgemesh.io/api/notarize5
Calls / 30d
2
Unique payers / 30d
Sep 4
Last called
exact
Payment scheme
Call this service
import { wrapFetchWithPayment } from "@x402/fetch";
import { privateKeyToAccount } from "viem/accounts";
const account = privateKeyToAccount(process.env.PRIVATE_KEY);
const fetchWithPay = wrapFetchWithPayment(fetch, account);
const res = await fetchWithPay("https://notary.forgemesh.io/api/notarize", {
method: "POST",
headers: { "Content-Type": "application/json" },
body: JSON.stringify({
"client_timestamp": "2026-07-03T12:00:00Z",
"model_id": "openai/gpt-5",
"prompt": "What is 2+2?",
"response": "4"
}),
});
const data = await res.json();curl -X POST \
"https://notary.forgemesh.io/api/notarize" \
-H "Content-Type: application/json" \
-d '{"client_timestamp":"2026-07-03T12:00:00Z","model_id":"openai/gpt-5","prompt":"What is 2+2?","response":"4"}' \
-H "X-PAYMENT: <signed x402 payment>"Example response
{
"algorithm": "ed25519",
"anchor": {
"status": "pending"
},
"attestation_id": "att_0123456789abcdef01234567",
"client_timestamp": "2026-07-03T12:00:00Z",
"content_hash": "9f86d081884c7d659a2feaa0c55ad015a3bf4f1b2b0b822cd15d6c15b0f00a08",
"model_id": "openai/gpt-5",
"notarized_at": "2026-07-03T12:00:01.000Z",
"payload_stored": false,
"receipt_token": "private-receipt-token",
"receipt_url": "https://notary.forgemesh.io/api/receipt/att_0123456789abcdef01234567",
"signature": "base64-ed25519-signature",
"signer_pubkey": "base64-ed25519-public-key"
}Payment details
0x814efe784709f5bf8df47735d87602b01030e5d2USD Coin · 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913Is this your API?
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