Accept Csv

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://csv-validator.mekler.ai/v1/accept/csv' \
  -H 'content-type: application/json' \
  --data-raw '{"csv":"id,amount\na,12.50\na,-2.00\n","spec":{"columns":[{"name":"id","required":true,"type":"string","unique":true},{"max":"100","min":"0","name":"amount","required":true,"type":"decimal"}],"min_rows":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 - -X POST 'https://csv-validator.mekler.ai/v1/accept/csv' \
  -H 'content-type: application/json' \
  --data-raw '{"csv":"id,amount\na,12.50\na,-2.00\n","spec":{"columns":[{"name":"id","required":true,"type":"string","unique":true},{"max":"100","min":"0","name":"amount","required":true,"type":"decimal"}],"min_rows":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 $0.05 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%2Fcsv-validator.mekler.ai%2Fv1%2Faccept%2Fcsv&method=POST
const res = await pay("https://csv-validator.mekler.ai/v1/accept/csv", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "csv": "id,amount\na,12.50\na,-2.00\n",
    "spec": {
      "columns": [
        {
          "name": "id",
          "required": true,
          "type": "string",
          "unique": true
        },
        {
          "max": "100",
          "min": "0",
          "name": "amount",
          "required": true,
          "type": "decimal"
        }
      ],
      "min_rows": 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 $0.05 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://csv-validator.mekler.ai/v1/accept/csv",
        json={
            "csv": "id,amount\na,12.50\na,-2.00\n",
            "spec": {
                "columns": [
                    {
                        "name": "id",
                        "required": True,
                        "type": "string",
                        "unique": True,
                    },
                    {
                        "max": "100",
                        "min": "0",
                        "name": "amount",
                        "required": True,
                        "type": "decimal",
                    },
                ],
                "min_rows": 1,
            },
        },
    )
    print(res.status_code, res.text)