Extract

{
  "input_type": "html",
  "mode_used": "tables",
  "source": {
    "url": "https://en.wikipedia.org/wiki/List_of_United_States_cities_by_population"
  },
  "tables": [
    {
      "caption": null,
      "columns": [
        {
          "header": "City",
          "key": "city",
          "type": "text"
        },
        {
          "header": "State",
          "key": "state",
          "type": "text"
        },
        {
          "header": "2024 estimate",
          "key": "c_2024_estimate",
          "type": "integer"
        }
      ],
      "context": "List of United States cities by population",
      "headers": [
        "City",
        "State",
        "2024 estimate"
      ],
      "index": 0,
      "n_cols": 3,
      "n_rows": 1,
      "rows": [
        {
          "c_2024_estimate": 8478072,
          "city": "New York",
          "state": "New York"
        }
      ],
      "source": {
        "table_index": 3,
        "type": "html"
      },
      "truncated": false
    }
  ],
  "tables_found": 9
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://tablegrab.onrender.com/v1/extract' \
  -H 'content-type: application/json' \
  --data-raw '{"clean":true,"max_tables":3,"mode":"tables","url":"https://en.wikipedia.org/wiki/List_of_United_States_cities_by_population"}'

# 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://tablegrab.onrender.com/v1/extract' \
  -H 'content-type: application/json' \
  --data-raw '{"clean":true,"max_tables":3,"mode":"tables","url":"https://en.wikipedia.org/wiki/List_of_United_States_cities_by_population"}' \
  | 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 $0.01 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.01" });
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 $0.01 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Ftablegrab.onrender.com%2Fv1%2Fextract&method=POST
const res = await pay("https://tablegrab.onrender.com/v1/extract", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "clean": true,
    "max_tables": 3,
    "mode": "tables",
    "url": "https://en.wikipedia.org/wiki/List_of_United_States_cities_by_population"
  }),
});
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 $0.01 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.01"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://tablegrab.onrender.com/v1/extract",
        json={
            "clean": True,
            "max_tables": 3,
            "mode": "tables",
            "url": "https://en.wikipedia.org/wiki/List_of_United_States_cities_by_population",
        },
    )
    print(res.status_code, res.text)