AI models, paid per call. No API key.

# see the quote (no payment yet) $ curl -X POST https://farouter.tech/v1/chat/completions \ -H "Content-Type: application/json" \ -d '{"model":"glm-5.3","messages":[{"role":"user","content":"hi"}],"max_tokens":50}' # response: 402 with quote + accepts in the # payment-required header (base64 JSON) # pay with any x402 client and retry: # it adds the PAYMENT-SIGNATURE header

import { wrapFetchWithPayment, x402Client } from "@x402/fetch"; import { UptoEvmScheme } from "@x402/evm/upto/client"; import { toClientEvmSigner } from "@x402/evm"; import { privateKeyToAccount } from "viem/accounts"; const account = privateKeyToAccount(process.env.BUYER_PK); const signer = toClientEvmSigner(account); const client = new x402Client().register("eip155:8453", new UptoEvmScheme(signer)); const fetchWithPay = wrapFetchWithPayment(fetch, client); const r = await fetchWithPay("https://farouter.tech/v1/chat/completions", { method: "POST", headers: { "Content-Type": "application/json" }, body: JSON.stringify({ model: "glm-5.3", messages: [{ role: "user", content: "hi" }], max_tokens: 50, }), }); const answer = await r.json();

import requests, base64, json # 1. get the quote r = requests.post( "https://farouter.tech/v1/chat/completions", json={"model": "glm-5.3", "messages": [{"role": "user", "content": "hi"}], "max_tokens": 50}, ) quote = r.json()["quote"] # 402, your USD spending cap # 2. build the x402 payment with the python # `x402` package (v2.21+) or any signer, # then retry with header: # PAYMENT: