Pay Test

{
  "amount_atomic": "1000",
  "amount_usd": "0.001",
  "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
  "catalog": {
    "human": "https://tanod.dev/pricing/",
    "llms_txt": "https://api.tanod.dev/llms.txt",
    "note": "Tanod: pay-per-call tools for agents, most USD 0.001-0.02, paid in USDC over x402.",
    "openapi": "https://api.tanod.dev/openapi.json",
    "x402_discovery": "https://api.tanod.dev/.well-known/x402"
  },
  "explorer_url": "https://basescan.org/tx/0xabababababababababababababababababababababababababababababababab",
  "facilitator": {
    "name": "payai",
    "url": "https://facilitator.payai.network"
  },
  "heartbeat": {
    "cost_usd": "0.001",
    "note": "Safe to call on a schedule as a health ping.",
    "safe_to_schedule": true
  },
  "key_id": "0123456789abcdef",
  "network": "eip155:8453",
  "network_name": "base",
  "next_suggested_check_s": 300,
  "note": "The receipt shows what Tanod's gate saw.",
  "ok": true,
  "paid": true,
  "payer": "0x1111111111111111111111111111111111111111",
  "public_key_url": "https://api.tanod.dev/.well-known/tanod-receipt-key",
  "rail": "x402",
  "receipt": {
    "amount_atomic": "1000",
    "issued_at": "2026-10-11T09:00:00Z",
    "network": "eip155:8453",
    "payer": "0x1111111111111111111111111111111111111111",
    "sha256": null,
    "tx": "0xabababababababababababababababababababababababababababababababab",
    "v": 1
  },
  "scheme": "exact",
  "signature": "base64-ed25519-signature",
  "signature_algorithm": "Ed25519",
  "timings_ms": {
    "settle": 1900,
    "verify": 180
  },
  "transaction": "0xabababababababababababababababababababababababababababababababab",
  "verify_url": "https://api.tanod.dev/v1/x402/pay-test/verify"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://tanod.dev/v1/x402/pay-test' \
  -H 'content-type: application/json' \
  --data-raw '{}'

# 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://tanod.dev/v1/x402/pay-test' \
  -H 'content-type: application/json' \
  --data-raw '{}' \
  | 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 $0.001 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.001" });
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 $0.001 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Ftanod.dev%2Fv1%2Fx402%2Fpay-test&method=POST
const res = await pay("https://tanod.dev/v1/x402/pay-test", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({}),
});
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 $0.001 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.001"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://tanod.dev/v1/x402/pay-test",
        json={},
    )
    print(res.status_code, res.text)