Matrix

{
  "attribution": "© OpenStreetMap contributors | © openrouteservice.org by HeiGIT | Airport data: OurAirports (public domain)",
  "destinations": [
    {
      "confidence": 0.9,
      "kind": "place",
      "lat": 28.5433,
      "lon": -81.3798,
      "name": "Hilton Orlando Downtown",
      "source": "photon"
    }
  ],
  "origins": [
    {
      "confidence": 1,
      "kind": "airport",
      "lat": 28.4294,
      "lon": -81.309,
      "name": "Orlando International Airport",
      "source": "ourairports"
    }
  ],
  "rows": [
    [
      {
        "distance_m": 20700,
        "duration_s": 1260,
        "estimated": false
      }
    ]
  ]
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://api.flipvo.com/v1/matrix' \
  -H 'content-type: application/json' \
  --data-raw '{"destinations":["Hilton Downtown Orlando","Disney Springs"],"near":"Orlando, FL","origins":["MCO"]}'

# 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://api.flipvo.com/v1/matrix' \
  -H 'content-type: application/json' \
  --data-raw '{"destinations":["Hilton Downtown Orlando","Disney Springs"],"near":"Orlando, FL","origins":["MCO"]}' \
  | 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 $0.05 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.05" });
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 $0.05 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapi.flipvo.com%2Fv1%2Fmatrix&method=POST
const res = await pay("https://api.flipvo.com/v1/matrix", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "destinations": [
      "Hilton Downtown Orlando",
      "Disney Springs"
    ],
    "near": "Orlando, FL",
    "origins": [
      "MCO"
    ]
  }),
});
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 $0.05 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.05"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://api.flipvo.com/v1/matrix",
        json={
            "destinations": [
                "Hilton Downtown Orlando",
                "Disney Springs",
            ],
            "near": "Orlando, FL",
            "origins": [
                "MCO",
            ],
        },
    )
    print(res.status_code, res.text)