Attest a settled call on Base · Attest

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://agent402.tools/api/attest", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({
    "tx": "0x2f1fecade9bd945e7817c11e5a34cafe6b349dd8c92a7587efed1de476bddfeb"
  }),
});
const data = await res.json();

curl -X POST \
  "https://agent402.tools/api/attest" \
  -H "Content-Type: application/json" \
  -d '{"tx":"0x2f1fecade9bd945e7817c11e5a34cafe6b349dd8c92a7587efed1de476bddfeb"}' \
  -H "X-PAYMENT: <signed x402 payment>"

{
  "attestTx": "0x9c8b7a6f5e4d3c2b1a0f9e8d7c6b5a4f3e2d1c0b9a8f7e6d5c4b3a2f1e0d9c8b",
  "attestationUrl": "https://base.easscan.org/attestation/view/0x5b4d0c1e8f7a4c2d9e0b6a3f1c8d7e6b5a4f3e2d1c0b9a8f7e6d5c4b3a2f1e0d",
  "attester": "0x77065d81e18ad403BCD6e9A0616b288e16744121",
  "block": "50829611",
  "chain": "eip155:8453",
  "data": {
    "payer": "0x902dcf34e53695bdea2ffb354b1a2e58bd598256",
    "priceUsd": 0.01,
    "responseSha256": "0x7d2a9b1c4e6f8a0b2c4d6e8f0a1b3c5d7e9f1a3b5c7d9e1f3a5b7c9d1e3f5a7b",
    "servedAt": "2026-09-03T15:16:06.000Z",
    "settlementNetwork": "eip155:8453",
    "settlementTx": "0x2f1fecade9bd945e7817c11e5a34cafe6b349dd8c92a7587efed1de476bddfeb",
    "slug": "crypto-price"
  },
  "eas": "0x4200000000000000000000000000000000000021",
  "existing": false,
  "schema": "string slug,bytes32 responseSha256,string settlementNetwork,string settlementTx,string payer,uint64 servedAt,uint64 priceMicroUsd",
  "schemaUid": "0x2a4e6c8d0f1b3a5c7e9d1f3b5a7c9e1d3f5b7a9c1e3d5f7b9a1c3e5d7f9b1a3c",
  "uid": "0x5b4d0c1e8f7a4c2d9e0b6a3f1c8d7e6b5a4f3e2d1c0b9a8f7e6d5c4b3a2f1e0d",
  "verify": {
    "attestation": "fetch the UID on https://base.easscan.org (or read EAS 0x4200000000000000000000000000000000000021 on Base): attester must be this server's wallet, schema must match",
    "payment": "follow settlementTx on eip155:8453: the payer paid this server's payTo",
    "responseDigest": "sha256 over the exact JSON bytes you received for that call; compare with responseSha256"
  }
}