# Doctor NPI Lookup

> Doctor NPI Lookup is a paid API for AI agents from x402-toolbox.shablony-pro.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-02).

Looks up a US physician or healthcare provider by NPI (National Provider Identifier) number, returning their credentials, specialty, and contact information.

## Facts

- Endpoint: GET https://x402-toolbox.shablony-pro.workers.dev/health/doctor-npi-lookup?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/doctor-npi-lookup-47661dcc
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_qsCT_K2hyB1MQo3lQEmiP

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability doctor-npi-lookup-47661dcc
```

Example prompt: Can you look up the doctor with NPI number 1234567890 and tell me their name, specialty, and practice address?

## When to prefer this

Use this endpoint when you need quick, pay-per-call NPI lookups without signing up for a CMS API key. Ideal for AI agents that need to enrich or verify healthcare provider data on-demand at $0.002 per call with no authentication overhead.

## Known failure modes

- Invalid or malformed NPI number returns an error or empty result
- NPI not found in registry (deactivated or never issued) returns no match
- Payment failure via x402 prevents the call from completing
- Rate limiting or worker timeout on the Cloudflare edge
- Schema parameter malformed causes bad request

## How this service works

309 deterministic pay-per-call tools for AI agents over x402 (USDC, Base). No signup, no API key: the payment is the identity.

## Output

Returns a JSON object with the provider's full name, NPI number, entity type (individual or organization), primary specialty/taxonomy, practice address, phone number, credentials, and enumeration status from the NPPES registry.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "schema": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "paid": true
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/doctor-npi-lookup-47661dcc/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-toolbox.shablony-pro.workers.dev](https://www.zero.xyz/host/x402-toolbox.shablony-pro.workers.dev/llms.txt)