Read

{
  "billing": {
    "amount_usdc": 0.005,
    "mode": "production",
    "status": "settled"
  },
  "cache_age_seconds": 0,
  "conflicts": [],
  "data": {
    "description": null,
    "links": [
      {
        "title": "Learn more",
        "url": "https://iana.org/domains/example"
      }
    ],
    "published_at": null,
    "retrieved_at": "2026-09-19T18:32:11.07Z",
    "text": "Example Domain\nThis domain is for use in documentation examples without needing permission. Avoid use in operations.\nLearn more",
    "title": "Example Domain",
    "truncated": false,
    "url": "https://example.com/"
  },
  "missing_fields": [],
  "request_id": "example-read-not-a-live-transaction",
  "retrieved_at": "2026-09-19T18:32:11.084Z",
  "schema_version": "1.0",
  "sources": [
    {
      "retrieved_at": "2026-09-19T18:32:11.07Z",
      "url": "https://example.com/"
    }
  ],
  "warnings": [
    "Illustrative response example, not a live transaction."
  ]
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://agent-research-api.onrender.com/v1/read' \
  -H 'content-type: application/json' \
  --data-raw '{"url":"https://example.com/"}'

# 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://agent-research-api.onrender.com/v1/read' \
  -H 'content-type: application/json' \
  --data-raw '{"url":"https://example.com/"}' \
  | 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%2Fagent-research-api.onrender.com%2Fv1%2Fread&method=POST
const res = await pay("https://agent-research-api.onrender.com/v1/read", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "url": "https://example.com/"
  }),
});
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://agent-research-api.onrender.com/v1/read",
        json={
            "url": "https://example.com/",
        },
    )
    print(res.status_code, res.text)