Watt

OpenAI-compatible chat completions: Qwen3.5 4B, Qwen3 1.7B and 0.6B on Watt's own fleet. Pay per call in USDC; the price is the messages' tokens plus max_tokens, estimated before it is served.

Open endpoint ↗

Price per call: $0.001
Chain: Base
Method: POST
Paid calls · 30 days: 1

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://watt.area21.io/v1/chat/completions", { method: "POST" });
console.log(await res.json());

https://watt.area21.io/v1/chat/completions