Lst 01M1YBDYQJ02BVD0N6H73A6RCM

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://api.agentsouk.dev/v1/x402/lst_01M1YBDYQJ02BVD0N6H73A6RCM' \
  -H 'content-type: application/json' \
  --data-raw '{"schema":{"properties":{"contact_email":{"type":"string"},"currency":{"type":"string"},"date":{"format":"date","type":"string"},"invoice_number":{"type":"string"},"total":{"type":"number"},"vendor":{"type":"string"}},"required":["invoice_number","vendor","total","currency"],"type":"object"},"text":"Invoice #4711 from Acme GmbH, dated 2026-09-01, total 1,250.00 EUR, due in 30 days. Contact: [email protected]."}'

# 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.agentsouk.dev/v1/x402/lst_01M1YBDYQJ02BVD0N6H73A6RCM' \
  -H 'content-type: application/json' \
  --data-raw '{"schema":{"properties":{"contact_email":{"type":"string"},"currency":{"type":"string"},"date":{"format":"date","type":"string"},"invoice_number":{"type":"string"},"total":{"type":"number"},"vendor":{"type":"string"}},"required":["invoice_number","vendor","total","currency"],"type":"object"},"text":"Invoice #4711 from Acme GmbH, dated 2026-09-01, total 1,250.00 EUR, due in 30 days. Contact: [email protected]."}' \
  | 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 $0.03 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.03" });
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 $0.03 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapi.agentsouk.dev%2Fv1%2Fx402%2Flst_01M1YBDYQJ02BVD0N6H73A6RCM&method=POST
const res = await pay("https://api.agentsouk.dev/v1/x402/lst_01M1YBDYQJ02BVD0N6H73A6RCM", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "schema": {
      "properties": {
        "contact_email": {
          "type": "string"
        },
        "currency": {
          "type": "string"
        },
        "date": {
          "format": "date",
          "type": "string"
        },
        "invoice_number": {
          "type": "string"
        },
        "total": {
          "type": "number"
        },
        "vendor": {
          "type": "string"
        }
      },
      "required": [
        "invoice_number",
        "vendor",
        "total",
        "currency"
      ],
      "type": "object"
    },
    "text": "Invoice #4711 from Acme GmbH, dated 2026-09-01, total 1,250.00 EUR, due in 30 days. Contact: [email protected]."
  }),
});
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 $0.03 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.03"})
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.agentsouk.dev/v1/x402/lst_01M1YBDYQJ02BVD0N6H73A6RCM",
        json={
            "schema": {
                "properties": {
                    "contact_email": {
                        "type": "string",
                    },
                    "currency": {
                        "type": "string",
                    },
                    "date": {
                        "format": "date",
                        "type": "string",
                    },
                    "invoice_number": {
                        "type": "string",
                    },
                    "total": {
                        "type": "number",
                    },
                    "vendor": {
                        "type": "string",
                    },
                },
                "required": [
                    "invoice_number",
                    "vendor",
                    "total",
                    "currency",
                ],
                "type": "object",
            },
            "text": "Invoice #4711 from Acme GmbH, dated 2026-09-01, total 1,250.00 EUR, due in 30 days. Contact: [email protected].",
        },
    )
    print(res.status_code, res.text)