Pay Fill With Context

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://api.getemboss.ai/pay/fill-with-context' \
  -H 'content-type: application/x-www-form-urlencoded' \
  --data-raw 'context=supporting+files%2C+repeatable&context_text=free+text+with+the+facts&context_urls=public+https+links%2C+repeatable&file=the+PDF+form+%28required%29'

# 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.getemboss.ai/pay/fill-with-context' \
  -H 'content-type: application/x-www-form-urlencoded' \
  --data-raw 'context=supporting+files%2C+repeatable&context_text=free+text+with+the+facts&context_urls=public+https+links%2C+repeatable&file=the+PDF+form+%28required%29' \
  | 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 $0.07 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.07" });
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 $0.07 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapi.getemboss.ai%2Fpay%2Ffill-with-context&method=POST
const res = await pay("https://api.getemboss.ai/pay/fill-with-context", {
  method: "POST",
  headers: { "content-type": "application/x-www-form-urlencoded" },
  body: new URLSearchParams([["context","supporting files, repeatable"],["context_text","free text with the facts"],["context_urls","public https links, repeatable"],["file","the PDF form (required)"]]),
});
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 $0.07 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.07"})
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.getemboss.ai/pay/fill-with-context",
        data={
            "context": "supporting files, repeatable",
            "context_text": "free text with the facts",
            "context_urls": "public https links, repeatable",
            "file": "the PDF form (required)",
        },
    )
    print(res.status_code, res.text)