To KMVY

{
  "flights": [
    {
      "aircraft_type": "B738",
      "destination": {
        "city": "Los Angeles",
        "code": "KLAX",
        "code_iata": "LAX",
        "code_icao": "KLAX",
        "name": "Los Angeles International"
      },
      "fa_flight_id": "AAL100-1733068800-airline-0001",
      "flight_number": "100",
      "ident": "AAL100",
      "ident_iata": "AA100",
      "ident_icao": "AAL100",
      "operator": "AAL",
      "operator_iata": "AA",
      "operator_icao": "AAL",
      "origin": {
        "city": "New York",
        "code": "KJFK",
        "code_iata": "JFK",
        "code_icao": "KJFK",
        "name": "John F. Kennedy International"
      },
      "scheduled_in": "2026-12-01T19:00:00Z",
      "scheduled_out": "2026-12-01T13:00:00Z",
      "status": "Scheduled"
    }
  ],
  "num_flights": 1,
  "num_pages": 1
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://stabletravel.dev/api/flightaware/airports/KDCA/flights/to/KMVY?max_pages=1'

# 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 - 'https://stabletravel.dev/api/flightaware/airports/KDCA/flights/to/KMVY?max_pages=1' \
  | 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 $0.1 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.1" });
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 $0.1 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fstabletravel.dev%2Fapi%2Fflightaware%2Fairports%2FKDCA%2Fflights%2Fto%2FKMVY
const res = await pay("https://stabletravel.dev/api/flightaware/airports/KDCA/flights/to/KMVY?max_pages=1");
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 $0.1 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.1"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://stabletravel.dev/api/flightaware/airports/KDCA/flights/to/KMVY?max_pages=1")
    print(res.status_code, res.text)