Skip to content
anlyon.devby Anlyon

NPILayer

com.npilayer/npilayernpilayer.comstreamable-httpv1.0.1Scanned

Look up U.S. healthcare providers by NPI, name, specialty and ZIP radius from CMS NPPES data.

3 tools: 3 only read.

Tools: 0 delete, 0 irreversible, 0 write, 3 read.
  • Reads private data · 0
  • Reads text others write · 0
  • Can send data out · 0
  • No findings

Tools listed without sign-in. Remote posture

Anlyon alternative

Run the operations that matter 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 →
Compare with similar serversMarkdownJSONReport this listing

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.

3 tools

Only reads 3Show 3 read-only tools
  • lookup_npiLook up a single U.S.No findings

    Why it is in this group

    • The name "lookup_npi" says "lookup": a word for reading.
    Description, as the server wrote it
    Look up a single U.S. healthcare provider or organization by its 10-digit National Provider Identifier (NPI), from CMS NPPES data. An NPI record identifies a provider; it does not indicate licensure, credentialing, network participation, or current practice status.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • providers_nearFind U.S.No findings

    Why it is in this group

    • The description's first verb is "find": a word for reading.
    Description, as the server wrote it
    Find U.S. healthcare providers within a radius of a ZIP code or coordinate, from CMS NPPES data. Provide either "zip", or both "lat" and "lng". Distance is measured from each provider's primary practice location to the ZIP centroid (not an exact street address), since NPILayer's geography is ZIP-based.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • search_providersSearch U.S.No findings

    Why it is in this group

    • The name "search_providers" says "search": a word for reading.
    Description, as the server wrote it
    Search U.S. healthcare providers and organizations by name, location, or specialty, from CMS NPPES data. Provide at least one filter; an empty search returns an arbitrary page of providers rather than a meaningful result.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false

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 untrusted-input or outbound.

Reads private data0
Reads files, mail, messages, databases, secrets, calendars or repositories.
Reads text others write0
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.

Remote posture

What anyone on the internet sees at the remote endpoint: an anonymous initialize and tools/list, and the public OAuth metadata.

Tools listed without sign-in

Looked at Nov 4, 2026, 02:18 UTC, unchanged since Nov 4, 2026. No credentials were sent and no tool was called. What is looked at.

Reachable
yes
HTTP status of an anonymous initialize
200
tools/list served without credentials
yes
Tools that change things, listed without credentials
0
Protocol version
2025-06-18
WWW-Authenticate on 401
not observed
resource_metadata in WWW-Authenticate
not observed
RFC 9728 protected resource metadata
https://npilayer.com/.well-known/oauth-protected-resource
Authorization servers
https://npilayer.com
Legacy HTTP+SSE transport
no
Dynamic client registration
yes
Client ID metadata documents
no

Findings

Matches of fixed checks, with the text they matched.

No check matched anything in these tool definitions. That is not a safety guarantee.

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.

All changes to this server

Install

Pinned to version 1.0.1. Values in angle brackets are yours to fill in.

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

Run 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.

.claude/settings.json
{
  "permissions": {
    "allow": [
      "mcp__npilayer__lookup_npi",
      "mcp__npilayer__search_providers",
      "mcp__npilayer__providers_near"
    ],
    "ask": [],
    "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 npilayer. Review it before you use it.

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.npilayer/npilayer/verify?hash=c62542038b1b944098e6acf2b16217d75ecf1381c6425de5adb42a77216b209b" | jq -e '.changed == false'

Pinned hash c62542038b1b, from Nov 4, 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.npilayer/npilayer/changes.xml

An Atom feed. Works in any feed reader or Slack's RSS app.

Badge

anlyon.dev badge for com.npilayer/npilayer
[![anlyon.dev](https://anlyon.dev/badge/com.npilayer/npilayer.svg)](https://anlyon.dev/servers/com.npilayer/npilayer)

Source: MCP Registry. Synced Nov 4, 2026, 03:17 UTC.