SimpleNPI MCP server

Which MCP servers are SimpleNPI's own, from the official registry and from asking its own domain, whether they answer, and what they offer. A program checked each of these, nobody copied them from a product page.

read 2026-10-29

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Whose server it is

Registry namecom.simplenpi/npiverified in the MCP registry

The registry name sits under simplenpi.com. The registry only lets a publisher use that namespace after proving control of the domain through DNS or HTTP.

When we asked itchecked 2026-10-29

Stateanswerschecked 2026-10-29
Tools7
Server calls itselfsimplenpi
Server version1.0.0
Protocol version2025-06-18

On 2026-10-29 the server answered initialize and tools/list without a sign-in. First answer in 517 ms.

Should an agent connect itNot proven either way yet

Its tools do apply for an NPI number through CMS, but not get credentialed with insurance panels and Medicare; prepare superbills for cash-paying clients.
Checked on 4 of the 7 days it takes to judge reliability.

Once connected

For "apply for an NPI number through CMS", the likely first call is start_npi_application.

Said by rules from the measurements above. The likely first call is a model's pick from the tool list; read its description before relying on it.

Measured dailydaily checks: 4, the first on 2026-10-29

INITE MCP scoreafter a weeka score needs 7 daily checks: 4 so far
What an agent can do with it1 of 3 use cases
Answeredmeasuring4 of the 7 daily checks it takes to print a share
Median first answer593 ms
Space in an agent's context≈ 1,374 tokensthe definitions of all its tools (7), which an agent carries on every turn
Tool definitionsA · 100 of 100
Typed results0 of 7 toolsdeclared outputSchema: results come typed, read once

Every tool passes all six checks.

What an agent can do with it

can do · apply for an NPI number through CMS
cannot · get credentialed with insurance panels and Medicare
cannot · prepare superbills for cash-paying clients

Each of the product's use cases, put to Jev against this server's tool list: can an agent do it with these tools?

Worth a look

None of the five warning signs in these definitions.

A program checks the server once a day: initialize and tools/list, no model. Tokens are the definitions' length at about four characters a token. The grade averages six checks of every tool's name, description, schema and annotations; it says how well the tools are described, not whether they work. The score weighs what was measured and nothing else: answering (25%), doing the product's job (25%), definitions (20%), context (10%), use (10%) and how readily a client connects (10%). A part that was not measured is left out, and a hidden instruction caps the score at 40. The state of vendors' MCP servers: method and numbers →

Tools it offers7 tools · read 2026-10-29

how_to_get_an_npi
Answers "how do I get an NPI number", "how to apply for an NPI", "what do I need for an NPI", "what is an NPI", "NPI for a massage therapist / counselor / nurse / chiropractor / social worker". Returns the plain steps for getting an…
lookup_npi
Free NPI lookup in the CMS NPPES registry (refreshed daily). Use for "look up an NPI", "find my NPI", "what is Dr Smith's NPI", "NPI registry search", "do I already have an NPI", "NPI for a clinic / practice / organization", "search NPI…
verify_npi
Free NPI verification / validation by number from the CMS NPPES registry. Use for "verify this NPI", "is this NPI valid", "is my NPI active", "check an NPI", "NPI status", "did my NPI get deactivated", "who does NPI 1234567890 belong to"…
start_npi_application
Use for "get me an NPI number", "I need an NPI", "apply for an NPI", "new NPI for a therapist / counselor / nurse / chiropractor / acupuncturist", "Type 1 NPI", "individual NPI application". First checks the registry so nobody applies…
check_npi_status
Use for "did my NPI come through", "where is my NPI application", "NPI application status", "has my NPI been issued yet". Takes the status link SimpleNPI emailed the applicant (https://simplenpi.com/s/<id>?k=<key>). Returns the status…
search
Search the CMS NPI registry with a free-text query: a provider name ("Jane Smith UT"), a business name, or a 10-digit NPI. Free, no login. Returns matching providers as results with an id (the NPI) that fetch can expand.
fetch
Fetch the full CMS registry record for one NPI (the id returned by search, or any 10-digit NPI): status, name, taxonomies and licenses, practice and mailing address, dates.

How to connect

Add the server to your MCP client config. Claude Desktop, Cursor and most other clients read this shape:

{
  "mcpServers": {
    "npi": {
      "type": "http",
      "url": "https://simplenpi.com/mcp"
    }
  }
}

Add it

Claude Code, in a terminal

claude mcp add --transport http simplenpi https://simplenpi.com/mcp

Add to Cursor Add to VS Code

claude.ai, ChatGPT and other clients: add https://simplenpi.com/mcp as a custom connector in the settings.

OpenAPI spec

4 paths, read 2026-10-29. Open the spec ↗

Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.