Agent Payload Tools

Create or verify an HMAC for a message or payload using SHA-256, SHA-384, or SHA-512. Useful for webhook signatures, shared-secret authentication, payload signing, and message integrity checks.

Open endpoint ↗

Price per call: $0.001
Chain: Base
Method: POST
Paid calls · 30 days: 8

Call it from code

This API is run by its own provider and paid directly through x402. We list it so you can find it; we don't route or hold the payment.

import { x402Client, wrapFetchWithPayment } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";

const client = new x402Client();
registerExactEvmScheme(client, { signer: agentAccount });

const pay = wrapFetchWithPayment(fetch, client);
const res = await pay("https://api.agent-payload-tools.workers.dev/hmac", { method: "POST" });
console.log(await res.json());

https://api.agent-payload-tools.workers.dev/hmac