SimpleNPI for ChatGPT

com.simplenpi/npi

Free NPI lookup and verification (CMS registry) and free NPI applications filed for you.

client:ChatGPT transport:streamable-http tools:7

Install SimpleNPI in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://simplenpi.com/mcp

Custom connectors are a paid-plan feature and take a remote URL only. ChatGPT cannot run a packaged server locally. ChatGPT docs