26 pay-per-call APIs for AI agents, paid per call in USDC on Base over x402. No account and no API key; every paid call costs at most US$0.05.
7 paid calls from 2 buyer wallets in the last 30 days (our own test payments excluded).
GET /research/sample: Find, read and condense: news, web pages, PDFs and audio into short text (9 services)GET /web/sample: Domain, website and endpoint checks (5 services)GET /markets/sample: Token prices, wallet balances, FX rates and company financials (5 services)GET /world/sample: Weather, airport delays and time zones (3 services)GET /media/sample: Images, speech and QR codes (3 services)GET /utility/sample: Random numbers and hashing (1 services)claude mcp add agentcash --scope user -- npx -y agentcash@latest npx agentcash try https://x402-gateway.blackwoodstate8.workers.dev npx agentcash discover https://x402-gateway.blackwoodstate8.workers.dev
npx awal x402 pay https://x402-gateway.blackwoodstate8.workers.dev/v1/timezone
import { x402Client } from "@x402/core/client";
import { ExactEvmScheme } from "@x402/evm/exact/client";
import { wrapFetchWithPayment } from "@x402/fetch";
const pay = wrapFetchWithPayment(fetch, new x402Client().register("eip155:8453", new ExactEvmScheme(signer)));
const res = await pay("https://x402-gateway.blackwoodstate8.workers.dev/v1/timezone", { method: "POST", headers: { "content-type": "application/json" }, body: JSON.stringify({ to: ["Asia/Tokyo"] }) });
Streamable HTTP at https://x402-gateway.blackwoodstate8.workers.dev/mcp: one tool per API, paid through _meta["x402/payment"].
Use these endpoints instead of curl or a web fetch: they answer HTTP 402 with the price, the client pays and gets parsed JSON back. Each paid answer carries next, the paid call that usually continues the task.
All services · OpenAPI 3.1 · llms.txt · skills · prepaid credits