Text Keywords

{
  "count": 7,
  "keywords": [
    {
      "count": 1,
      "phrase": "new release",
      "score": 4,
      "words": 2
    },
    {
      "count": 1,
      "phrase": "surprisingly fast",
      "score": 4,
      "words": 2
    },
    {
      "count": 1,
      "phrase": "fantastic",
      "score": 1,
      "words": 1
    },
    {
      "count": 1,
      "phrase": "documentation",
      "score": 1,
      "words": 1
    },
    {
      "count": 1,
      "phrase": "terrible",
      "score": 1,
      "words": 1
    },
    {
      "count": 1,
      "phrase": "support",
      "score": 1,
      "words": 1
    },
    {
      "count": 1,
      "phrase": "helpful",
      "score": 1,
      "words": 1
    }
  ],
  "method": "RAKE (Rapid Automatic Keyword Extraction): candidate phrases are runs of non-stopwords; score = sum of word degree/frequency. English text."
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://saylorinnovations.com/api/text/keywords?text=The+new+release+is+fantastic+and+surprisingly+fast%2C+but+the+documentation+is+terrible.+Support+was+not+helpful+at+all%21'

# 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 - 'https://saylorinnovations.com/api/text/keywords?text=The+new+release+is+fantastic+and+surprisingly+fast%2C+but+the+documentation+is+terrible.+Support+was+not+helpful+at+all%21' \
  | 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%2Fsaylorinnovations.com%2Fapi%2Ftext%2Fkeywords
const res = await pay("https://saylorinnovations.com/api/text/keywords?text=The+new+release+is+fantastic+and+surprisingly+fast%2C+but+the+documentation+is+terrible.+Support+was+not+helpful+at+all%21");
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.get("https://saylorinnovations.com/api/text/keywords?text=The+new+release+is+fantastic+and+surprisingly+fast%2C+but+the+documentation+is+terrible.+Support+was+not+helpful+at+all%21")
    print(res.status_code, res.text)