Developer & Data Tools for AI Agents — built for autonomous payments
Pay-per-call APIs designed for AI agents: precise, deterministic tools an LLM can't guess — on-chain data, crypto, parsing, conversion, text, generation and more. Built on the x402 protocol — settled in USDC on Base, no accounts, no API keys, no subscriptions.
🌐 Live: x402node.dev 📂 Full catalog (live manifest): api.x402node.dev/.well-known/x402-manifest.json
150+ endpoints across 30+ categories. A sample:
| Group | Examples |
|---|---|
| Chain data | /chain/tx-decode, /chain/base-gas |
| Crypto | /crypto/random-bytes, hashing, encoding |
| Dev utilities | /dev/uuid, /generate/password, /generate/color-palette |
| Parsing & convert | /url/*, /convert/*, /text/lorem |
| Validation & math | /validate/*, /math/* |
| Time | /time/timezone-convert |
| Supply-chain / security | /supply/ioc-list, /supply/ioc-scan |
| Search | /search/news |
The live manifest above is the authoritative, always-current list with prices.
npm i x402-fetch viemimport { wrapFetchWithPayment } from "x402-fetch";
import { createWalletClient, http } from "viem";
import { privateKeyToAccount } from "viem/accounts";
import { base } from "viem/chains";
const account = privateKeyToAccount("0xYOUR_KEY");
const wallet = createWalletClient({ account, chain: base, transport: http() });
const pay = wrapFetchWithPayment(fetch, wallet);
const r = await pay("https://api.x402node.dev/chain/tx-decode?tx=0x...");
console.log(await r.json()); // 402 -> auto-sign EIP-3009 -> 200 + dataAny x402-capable client or agent works — the protocol is plain HTTP.
The server returns 402 Payment Required with the payment terms; your client signs an EIP-3009 authorization; the Coinbase CDP facilitator settles on Base; the request is fulfilled — end to end in about a second. The agent simply pays per call.
These endpoints are paid programmatically. Opening one in a browser and trying to pay by hand won't complete — use an x402 client or an x402-capable agent.
- Site: https://x402node.dev
- Manifest: https://api.x402node.dev/.well-known/x402-manifest.json
- x402 protocol: https://github.com/coinbase/x402
- awesome-x402: https://github.com/Merit-Systems/awesome-x402
cn402 — Chinese metaphysics & almanac data for AI agents, same x402 rails.