Rate a call you paid for

Tell this server whether a call you paid for delivered what it promised. Bound to the receipt: give it the settlement transaction from that call's PAYMENT-RESPONSE (or Payment-Receipt) header and a verdict of "good" or "bad", and only the wallet the ledger records as having paid for that exact call can write it - so a rating here is always a real customer about a real purchase. One verdict per settlement transaction (sending another replaces yours, it never stacks). A "bad" verdict requires a reason of at least ten characters and is logged for a human with the sha256 of the bytes that call actually served, so the complaint names a specific answer rather than a bad day. Your words are stored for the operator and are never published; the public tally is counts only. Requires an EIP-3009 payment from the same wallet; the $0.001 is the settlement floor, not a charge for complaining, and every refusal is free.

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Input

Example output

{
  "recorded": true,
  "replaced": false,
  "item": "crypto-price",
  "verdict": "good",
  "settlementTx": "0x2f1fecade9bd945e7817c11e5a34cafe6b349dd8c92a7587efed1de476bddfeb",
  "settledAt": "2026-09-03T15:16:06.000Z",
  "amountUsd": 0.01,
  "responseSha256": "7d2a9b1c4e6f8a0b2c4d6e8f0a1b3c5d7e9f1a3b5c7d9e1f3a5b7c9d1e3f5a7b",
  "note": "responseSha256 is sha256 over the exact JSON bytes that call returned. It identifies the answer your verdict is about."
}

Try it - see the 402 challenge (free)

curl -i -X POST https://agent402.tools/api/feedback \
  -H "Content-Type: application/json" \
  -d '{"tx":"0x2f1fecade9bd945e7817c11e5a34cafe6b349dd8c92a7587efed1de476bddfeb","verdict":"good"}'

The response is HTTP 402 Payment Required with exact payment requirements. Any x402 v2 client pays automatically and retries:

Paid call (JavaScript agent)

import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client } from "@x402/core/client";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";
import { metaTitle, metaDescription } from "./seo-meta.js";

const client = new x402Client();
registerExactEvmScheme(client, { signer: privateKeyToAccount(KEY) });
const payFetch = wrapFetchWithPayment(fetch, client);

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

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