Npi

{
  "attribution": "NPPES NPI Registry (US government data)",
  "checkedAt": "2026-10-14T07:00:43.329Z",
  "providers": [
    {
      "credential": "LCSW",
      "name": "JACKELYN RAE KELLEY",
      "npi": "1063837144",
      "practice": {
        "address": "1001 POTRERO AVE WARD 93",
        "city": "SAN FRANCISCO",
        "phone": "724-544-3437",
        "postalCode": "941103518",
        "state": "CA"
      },
      "status": "active",
      "taxonomy": "Social Worker, Clinical",
      "type": "individual"
    }
  ],
  "query": {
    "name": null,
    "number": "1063837144",
    "state": null
  },
  "source": "https://npiregistry.cms.hhs.gov/api/ (NPPES NPI Registry v2.1)"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://api.sitecheck-api.workers.dev/api/npi?number=1063837144'

# 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://api.sitecheck-api.workers.dev/api/npi?number=1063837144' \
  | 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 $0.001 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.001" });
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 $0.001 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapi.sitecheck-api.workers.dev%2Fapi%2Fnpi
const res = await pay("https://api.sitecheck-api.workers.dev/api/npi?number=1063837144");
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 $0.001 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.001"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://api.sitecheck-api.workers.dev/api/npi?number=1063837144")
    print(res.status_code, res.text)