x402 pay-per-call APIs

Nodely sells pay-per-call APIs for AI agents at https://x402.api.nodely.io. You pay per request with x402 in USDC on Algorand mainnet. You don’t need an account, a sign-up or an API key.

How it works

1. Call a paid route.
2. The API answers HTTP 402 Payment Required with the price and where to pay.
3. Your client signs one USDC transfer and sends the same request again with the signed payment attached.
4. The API answers with the result and the payment’s transaction id.

The official x402 clients handle all of this. Pricing & payment covers the details and has a client example.

Why no API keys

An agent can find the API, read the price from the 402 response and pay, all without a human. You don’t need a sign-up, a key to rotate or a monthly plan. You pay only for requests that deliver a result.

APIs and prices

API	Route	Price
Web search	POST / GET /v1/search	0.01 USDC per query
Page scrape	POST / GET /v1/scrape	0.01 USDC per page

A search that returns nothing isn’t charged. A scrape that fails or hits an HTTP error page isn’t charged either. More APIs are coming, starting with historical Algorand asset prices.

Free routes

Route	What it returns
/v1/search/pricing, /v1/scrape/pricing	Price, asset, networks and receiving address
/v1/search/health, /health	Service health
/docs/	Live, interactive API reference
/openapi.json	OpenAPI 3.1 description
/.well-known/x402, /llms.txt	Machine-readable discovery, see Discovery

Try it

This request shows the 402 payment offer without paying anything:

curl -si -X POST https://x402.api.nodely.io/v1/search \
  -H 'Content-Type: application/json' \
  -d '{"query":"x402"}'