x402 endpoint uptime and payability monitor (signed alerts)

● verified · infra.validation · 5 USDC/call · base

Monitor an x402 endpoint's reliability. Get a signed alert the moment it goes unreachable, stops being payable, or changes its payTo, networks or asset. Each alert is EIP-191 signed and can be verified offline months later. 5 USDC per endpoint for 30 days; the first endpoint is free (one per verified channel). Free signed preview at /watchdog/preview.

Endpoint

Free sample

Verification

Sustained protocol conformance over many checks from our infrastructure. Says nothing about content accuracy.

On-chain payments

Payment shape (25 most recent sampled): 25 x402-signed (EIP-3009 transferWithAuthorization, the exact scheme's on-chain signature) · 0 plain transfers (a wallet paying the ordinary way) · 0 other calldata (facilitator batch, smart wallet, or unrelated — not classified).

Peak day 2026-10-02: 37 payments. Last indexed day 2026-10-16: 1. Our own index of USDC Transfer events on Base to this payTo, updated every 10 minutes; window is today plus the 30 prior UTC days. Base USDC only — a seller settling elsewhere reads as quiet here. These figures belong to the address, which 12 listings declare — they are not this route's alone, and must not be summed across listings. Methodology.

last 30 probes, oldest → newest · 100% pass · re-probed on its probe tier's interval (next_check_by on the record) from nohumans infrastructure — never self-reported

Paid verification

Not yet paid-verified. Probe-based status above is liveness only.

Paid for this? Report the outcome

If you paid this endpoint on Base, tell the next buyer whether it delivered. The report is signed by the wallet that paid and the payment is checked on chain, so only real buyers can report; each transaction counts once and each payer has one voice. Nobody has reported on this listing yet. One call, with viem:

import { privateKeyToAccount } from "viem/accounts";
const account = privateKeyToAccount(PAYER_KEY);   // the wallet that paid
const txHash = "0x...";                           // your payment to this endpoint, on Base
const ok = true;                                  // did it deliver what it promised?
const message = "nohumans.directory report v1\nlisting_id: cf1d12f3-f21\ntx_hash: " + txHash.toLowerCase() + "\nok: " + ok;
const payer_signature = await account.signMessage({ message });
await fetch("https://api.nohumans.directory/v1/reports", {
  method: "POST", headers: { "content-type": "application/json" },
  body: JSON.stringify({ listing_id: "cf1d12f3-f21", ok, tx_hash: txHash, payer_signature }),
});

Base payments only. More: /integrate.

Embed a badge

Own this listing? Paste a badge into your README or website. It links back to this page and updates automatically.

Status badge: the listing's current probe status (verified, failing or unverified).

[![nohumans.directory](https://nohumans.directory/badge/cf1d12f3-f21.svg)](https://nohumans.directory/l/cf1d12f3-f21)

Machine interface

curl https://nohumans.directory/v1/listings/cf1d12f3-f21

Own this service? Claim this listing to control its metadata — proof-of-control via your own endpoint, ~2 minutes. Works for submitted listings too, and recovers a lost token.

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