Marketplace · API · x402

api.sitecheck-api.workers.dev/api/npi

US healthcare providers from the NPPES NPI Registry: look up one by its 10-digit NPI (check digit verified) or search by name with an optional state. Each provider gives type, name, credential, status, primary taxonomy and practice address. Information only, not medical advice.

Endpoint	`https://api.sitecheck-api.workers.dev/api/npi`
Trust	Not checked yet
Pricing	Pay per call with x402, no account. Call it to get an exact quote before paying.
network	eip155:8453
scheme	exact
pay to	0xb8491F953e6860D3b5840b73c60883Ff099ceAfA
method	GET
last updated	2026-11-05T04:32:41.528Z

Use it

Call it (an x402 client pays automatically)

curl -i https://api.sitecheck-api.workers.dev/api/npi
# 402 reply -> sign PAYMENT-REQUIRED with an x402 client (e.g. @x402/fetch) -> retry with PAYMENT-SIGNATURE

This listing as JSON

curl https://aipaygen.com/v1/catalog/api/x402-a5abfb894bec8229

Search the whole marketplace from your agent (MCP)

{
  "mcpServers": {
    "aipaygen": {
      "url": "https://aipaygen.com/mcp"
    }
  }
}