NPPES NPI Registry MCP by usefulapi

The four tools have distinct primary purposes: exact NPI lookup, general multi-criteria search, individual-only search, and organization-only search. However, nppes_search overlaps functionally with the two specialized search tools, creating some risk that an agent defaults to it unnecessarily, though the descriptions clearly guide when to use each.

All tools use the consistent prefix 'nppes_' and snake_case, following a predictable action_object pattern (lookup_npi, search, search_individuals, search_organizations). The naming is immediately readable and leaves no ambiguity about the tool family.

Four tools is a lean, well-scoped set for a read-only registry API. Each tool covers a clear use case (exact lookup, general search, and two specialized searches), though the two specialized tools could arguably be folded into the general search, making the count slightly redundant but not excessive.

The surface covers the core read-only operations of the NPPES registry: exact NPI lookup and multi-criteria search for both individuals and organizations. Minor gaps exist, such as batch lookup or explicit pagination controls, but the essential retrieval workflows are present with no obvious dead ends.