Fetch

{
  "content_chars": 153,
  "content_sha256": "8f5771012a0d69b586ff3fcb1d3ece5d4f489d7e63f8d331d76bb02804d8036b",
  "final_url": "https://example.com/",
  "markdown": "# Example\n\nThis synthetic response illustrates the contract only. It is not an actual page fetch, settlement, performance measurement or customer result.",
  "published_at": null,
  "quality": {
    "method": "document",
    "status": "usable",
    "warnings": [
      "Synthetic example only."
    ]
  },
  "replay": false,
  "request_id": "example-only",
  "retrieved_at": "2026-10-02T00:00:00.000Z",
  "schema_version": "1.0",
  "source_status": 200,
  "source_url": "https://example.com/",
  "timing": {
    "extraction_ms": 0,
    "source_fetch_ms": 0
  },
  "title": "Example",
  "truncated": false,
  "untrusted_content": true
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://signalforgestudios.com/x402/fetch' \
  -H 'content-type: application/json' \
  --data-raw '{"max_chars":12000,"request_key":"example-job-000001","url":"https://signalforgestudios.com/capabilities/"}'

# x402 v2 sends the challenge base64-encoded in the PAYMENT-REQUIRED header (v1 sends it in the body).
# To read the header:
curl -sS -g -o /dev/null -D - -X POST 'https://signalforgestudios.com/x402/fetch' \
  -H 'content-type: application/json' \
  --data-raw '{"max_chars":12000,"request_key":"example-job-000001","url":"https://signalforgestudios.com/capabilities/"}' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode

// npm i @x402/fetch @x402/evm viem
import { wrapFetchWithPayment, x402Client } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

// Pays at most $0.005 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.005" });
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.EVM_PRIVATE_KEY) });
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? ToolVet checks it first for $0.005. Pay for that from a separate
// client: this one is capped at $0.005 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fsignalforgestudios.com%2Fx402%2Ffetch&method=POST
const res = await pay("https://signalforgestudios.com/x402/fetch", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "max_chars": 12000,
    "request_key": "example-job-000001",
    "url": "https://signalforgestudios.com/capabilities/"
  }),
});
console.log(res.status, await res.text());

# pip install "x402[requests,evm]"
import os
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client

# Pays at most $0.005 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.005"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://signalforgestudios.com/x402/fetch",
        json={
            "max_chars": 12000,
            "request_key": "example-job-000001",
            "url": "https://signalforgestudios.com/capabilities/",
        },
    )
    print(res.status_code, res.text)