NPPES NPI Registry & Healthcare Provider Lookup API

Search the official public NPPES NPI Registry by exact NPI, provider or organization name, taxonomy, and location for provider onboarding, directory enrichment, and credentialing preflight. Deterministic test: npi=1881018208&maxResults=1 returns Mayo Clinic. NPI assignment and status A are administrative registry evidence—not identity, licensure, good standing, credentialing, sanctions clearance, Medicare or Medicaid enrollment, billing or ordering authority, current practice, or employment. MCP tool: search_npi_registry.

x402 verified · $0.01 USDC/request · 2 endpoints / 1 tools · Data · base network · x402 protocol

How to call this API

Every protected route returns HTTP 402 with x402 payment requirements. An agent pays the stated USDC amount on Base and retries with the payment header. No API keys, no accounts. Browse the marketplace or list your own API.

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