Page Speed

{
  "consoleErrors": [],
  "consoleErrorsPartial": {
    "complete": true,
    "matched": 0,
    "returned": 0,
    "truncated": false
  },
  "device": "mobile",
  "finalUrl": "https://agent402.tools/",
  "heaviestResources": [
    {
      "bytes": 41210,
      "type": "document",
      "url": "https://agent402.tools/"
    }
  ],
  "heaviestResourcesPartial": {
    "complete": false,
    "matched": 9,
    "returned": 1,
    "truncated": true
  },
  "measurement": {
    "fieldData": false,
    "kind": "lab-single-run",
    "lighthouseScore": false,
    "note": "A single measurement from one server location under shared load. It is a single lab measurement, not field data from real users; repeat the call and compare runs before drawing conclusions.",
    "runs": 1,
    "source": "one load in a headless Chromium from one server location, on shared infrastructure, with no network or CPU throttling"
  },
  "networkIdle": true,
  "renderBlocking": [],
  "renderBlockingPartial": {
    "complete": true,
    "matched": 0,
    "returned": 0,
    "truncated": false
  },
  "status": 200,
  "timings": {
    "domContentLoadedMs": 401,
    "loadMs": 655,
    "ttfbMs": 182
  },
  "transfer": {
    "failedRequests": 0,
    "requestCount": 9,
    "totalBytes": 98123
  },
  "untrustedContent": true,
  "url": "https://agent402.tools",
  "viewport": {
    "height": 823,
    "width": 412
  },
  "webVitals": {
    "cls": 0.0012,
    "fcpMs": 430,
    "lcpElement": "h1",
    "lcpMs": 512,
    "longTaskCount": 0,
    "totalBlockingTimeMs": 0
  }
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://agent402.tools/api/page-speed' \
  -H 'content-type: application/json' \
  --data-raw '{"device":"mobile","url":"https://agent402.tools"}'

# 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://agent402.tools/api/page-speed' \
  -H 'content-type: application/json' \
  --data-raw '{"device":"mobile","url":"https://agent402.tools"}' \
  | 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 $0.01 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.01" });
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 $0.01 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fagent402.tools%2Fapi%2Fpage-speed&method=POST
const res = await pay("https://agent402.tools/api/page-speed", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "device": "mobile",
    "url": "https://agent402.tools"
  }),
});
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 $0.01 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.01"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://agent402.tools/api/page-speed",
        json={
            "device": "mobile",
            "url": "https://agent402.tools",
        },
    )
    print(res.status_code, res.text)