SimpleNPI
com.simplenpi/npisimplenpi.comstreamable-httpv1.0.0Scanned
Free NPI lookup and verification (CMS registry) and free NPI applications filed for you.
7 tools: 2 change things and 5 only read.
- Reads private data · 0
- Reads text others write · 5
- Can send data out · 0
- 1 finding
Anlyon alternative
2 of these tools change something. Run those as governed actions.
Declare what an action changes, and Anlyon puts it under a shared limit, binds every approval to the exact request, and grades the outcome. It works on any HTTPS API you can describe as an action.
Anlyon does not run, proxy or govern this MCP server. A tool your own code calls directly is not routed through Anlyon and is not governed by it.
Import an OpenAPI spec →Tools
Grouped by what each tool does, most consequential first. Open one for its reasons and full description; descriptions are the publisher's own words.
7 tools
Changes things 2Claude Code: ask
start_npi_applicationUse 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 app…Reads text others write1 finding
Why it is in this group
- The name "start_npi_application" says "start": a word for a change.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Findings
- Warn
The server marks "start_npi_application" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
What this check looks forMatched text
annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":true}; The name "start_npi_application" says "start": a word for a change.
Description, as the server wrote it 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 twice (CMS issues one NPI per person for life), then returns a personal link to the free SimpleNPI form with the known fields prefilled. The person finishes the form on simplenpi.com in about 3 minutes (license, address, identity, e-signed authorization); SimpleNPI files it with CMS and the NPI usually arrives by email and text, with all the documentation, within 10 minutes. Nothing is filed until the person completes and signs the form. Do not collect the SSN or date of birth in chat.
Annotations the server declares
- title: Start a free NPI application
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
verify_npiFree NPI verification / validation by number from the CMS NPPES registry.Reads text others writeNo findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Description, as the server wrote it 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", "what taxonomy is on my NPI". Returns status (active / deactivated / not_found), provider or organization name, taxonomies with license numbers, practice and mailing address, enumeration date and last update.
Annotations the server declares
- title: Verify an NPI
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
Only reads 5Show 5 read-only tools
check_npi_statusUse for "did my NPI come through", "where is my NPI application", "NPI application status", "has my NPI been issued yet".No findings
Why it is in this group
- The name "check_npi_status" says "status": a word for reading.
Description, as the server wrote it 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, the NPI once issued, and what happens next.
Annotations the server declares
- title: Check NPI application status
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
fetchFetch 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.Reads text others writeNo findings
Why it is in this group
- The name "fetch" says "fetch": a word for reading.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Description, as the server wrote it 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.
Annotations the server declares
- title: Fetch NPI record
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
how_to_get_an_npiAnswers "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 / so…No findings
Why it is in this group
- The name "how_to_get_an_npi" says "get": a word for reading.
Description, as the server wrote it 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 individual (Type 1) NPI: the free do-it-yourself path at nppes.cms.hhs.gov, the free SimpleNPI done-for-you path (usually within 10 minutes), what information is needed, the taxonomy code for the profession, and how long it takes. Call this first when someone asks how to get an NPI.
Annotations the server declares
- title: How to get an NPI number
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
lookup_npiFree NPI lookup in the CMS NPPES registry (refreshed daily).Reads text others writeNo findings
Why it is in this group
- The name "lookup_npi" says "lookup": a word for reading.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Description, as the server wrote it 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 by name". Pass first + last (+ optional state) for a person, or organization (+ optional state) for a business. Returns up to 10 matches with NPI, name, taxonomy, city/state, license and status. No login or key needed.
Annotations the server declares
- title: Look up an NPI
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
searchSearch the CMS NPI registry with a free-text query: a provider name ("Jane Smith UT"), a business name, or a 10-digit NPI.Reads text others writeNo findings
Why it is in this group
- The name "search" says "search": a word for reading.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Description, as the server wrote it 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.
Annotations the server declares
- title: Search NPI registry
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.
Exfil surface
Which tools read private data, which read text someone else can write, and which can send data out. One of each is a path a prompt injection can use.
No private-data, untrusted-input, outbound path in this server alone: no tool is tagged private-data or outbound.
- Reads private data0
- Reads files, mail, messages, databases, secrets, calendars or repositories.
- Reads text others write5
- Brings in text someone else can write: web pages, inbound email, messages, issues and comments.
- Can send data out0
- Can carry data to people or systems: it sends, posts or publishes, or takes a recipient, channel or URL.
Other servers in the same agent add their own tools to these paths. Audit your whole setup to see them together.
Findings
Matches of fixed checks, with the text they matched.
The server marks "start_npi_application" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
What this check looks forMatched text
annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":true}; The name "start_npi_application" says "start": a word for a change.
History
Changes to its tool definitions and to its remote endpoint, newest first.
No change seen yet. Its tools are rescanned every day, and a remote endpoint is looked at once a week.
Install
Pinned to version 1.0.0. Values in angle brackets are yours to fill in.
claude mcp add --transport http npi https://simplenpi.com/mcpclaude mcp add --transport http npi https://simplenpi.com/mcpRun in a terminal.
Claude Code permissions
Allow the reads, ask before a change or a way out, deny the deletes. Paste into .claude/settings.json.
{
"permissions": {
"allow": [
"mcp__npi__how_to_get_an_npi",
"mcp__npi__lookup_npi",
"mcp__npi__check_npi_status",
"mcp__npi__search",
"mcp__npi__fetch"
],
"ask": [
"mcp__npi__verify_npi",
"mcp__npi__start_npi_application"
],
"deny": []
}
}Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. A read that can send data out (it takes a URL, say) asks first too. It assumes the server is installed as npi. Review it before you use it.
Capability tags behind 5 rules
- mcp__npi__lookup_npi untrusted-input
- mcp__npi__verify_npi untrusted-input
- mcp__npi__start_npi_application untrusted-input
- mcp__npi__search untrusted-input
- mcp__npi__fetch untrusted-input
Pin
Keep the decision: fail CI when the tools change, follow every change, or show a badge.
Pin in CI
Fail a build when the tools you reviewed are not the tools the server serves today.
curl -s "https://anlyon.dev/api/v1/servers/com.simplenpi/npi/verify?hash=cae58a8b1286f51906ba261949a25382401d172065f8c283b1dfdfa7bb52f18a" | jq -e '.changed == false'Pinned hash cae58a8b1286, from Oct 28, 2026, 03:17 UTC.
Watch
Get told when its tools change: a new tool, a new description, a new class.
https://anlyon.dev/servers/com.simplenpi/npi/changes.xmlAn Atom feed. Works in any feed reader or Slack's RSS app.
Badge
[](https://anlyon.dev/servers/com.simplenpi/npi)Source: MCP Registry. Synced Oct 28, 2026, 03:17 UTC.