MCP API

Name: MCP API
Author: FusionAuth

by FusionAuthversion 0.1.14i★ –iRuns on your computer

Registry nameio.fusionauth/mcp-api

Install

Overview

Description from the maker (original English)

Preview release of FusionAuth API MCP server

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
UsageiNot measured yet★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs on your computer
Transport: stdio
Category: Other
You need to fill in: API_KEY_APIKEYAUTH, API_BASE_URL

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 1 of 1 passed
Runs on your computer with your user’s permissions (files, network, apps).
You fill in yourself: API_KEY_APIKEYAUTH, API_BASE_URL, USE_TOOLS

Values marked secret are keys to your account. Never share them or paste them into a chat.

You need

npmNode.js installed (for the npx command)

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json

{
  "mcpServers": {
    "api": {
      "command": "npx",
      "args": [
        "-y",
        "@fusionauth/mcp-api"
      ],
      "env": {
        "API_KEY_APIKEYAUTH": "your-value",
        "API_BASE_URL": "your-value",
        "USE_TOOLS": "your-value"
      }
    }
  }
}

Run this in your terminal

claude mcp add api --env API_KEY_APIKEYAUTH=your-value --env API_BASE_URL=your-value --env USE_TOOLS=your-value -- npx -y @fusionauth/mcp-api

Fill in the empty values before running it.

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "api": {
      "command": "npx",
      "args": [
        "-y",
        "@fusionauth/mcp-api"
      ],
      "env": {
        "API_KEY_APIKEYAUTH": "your-value",
        "API_BASE_URL": "your-value",
        "USE_TOOLS": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "api": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@fusionauth/mcp-api"
      ],
      "env": {
        "API_KEY_APIKEYAUTH": "your-value",
        "API_BASE_URL": "your-value",
        "USE_TOOLS": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

This one runs on your computer, and ChatGPT can only connect to servers on the internet. Pick another app.

Your choice stays on this device in a cookie; no account needed.

Values you fill in

API_KEY_APIKEYAUTH secret required env
Your API key for FusionAuth instance
API_BASE_URL required env
The URL for your FusionAuth instance
USE_TOOLS env
Prefixes of APIs to create MCP tools for, if not set defaults to all available tools

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

Runs on your computer; the tool list appears in your AI app after you install it.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 6, 2026

✓ Pass
Maker matches the repo
The registry name was verified against the domain fusionauth.io (the registry checks domain ownership)
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
– Not applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
– Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
… Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints

Compared with others in Otheri

More stars than 0% of the other 32417 servers in this category
Published to the registry more recently than 1% of the other 32417 servers in this category
Basic checks equal to or better than 100% of the other 32417 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is MCP API safe?

It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

You need to fill in: API_KEY_APIKEYAUTH, API_BASE_URL

Does it run on my computer or in the cloud?

It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).

Is it still maintained?

The GitHub repo last changed –, and the latest version (0.1.14) reached the registry 12 months ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Node.js on your computer.

What can I use instead?

In the same category: Spec Driven Development, Remote Desktop Commander, FOGA node

Alternatives

Servers in the same category from other makers, sorted by stars.

Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

Spec Driven Development

by formulahendry

MCP Server that facilitates spec-driven development workflows, not just Vibe Coding.

Runs on your computer★ 440MITUpdated 14 months ago

Install

Remote Desktop Commander

by desktop-commander

Remote Desktop Commander: use files, terminal and processes on your own computers from any AI app.

Runs in the cloud★ 211Updated yesterday

Install

FOGA node

by garyyang-finchip

A Finch OG Agent cell as an MCP server: read the world, dry-run and take ERC-8414 tenders by policy.

Computer or cloudUpdated today

Install

README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

FusionAuth API MCP Server (fusionauth-mcp-api)

Using this MCP server requires a FusionAuth API key which is stored in the MCP client configuration. Scope the API key appropriately.

FusionAuth is not responsible for potentially leaking sensitive information.

Prerequisites

A running FusionAuth instance
Node.js

Configuration

First, set up a limited API key in the FusionAuth instance. Here's documentation on creating an API key and configuring the correct permissions for an API key.

Next, configure your MCP client to use the FusionAuth API MCP server.

For example, to add to Claude Desktop, edit ~/Library/Application Support/Claude/claude_desktop_config.json to include the fusionauth-mcp-api key below.

If you don't have any previous MCP servers installed, it would look like this:

"mcpServers": { "fusionauth-mcp-api": { "command": "npx", "args": [ "@fusionauth/mcp-api" ], "env": { "API_KEY_APIKEYAUTH": " ", "API_BASE_URL": "http://localhost:9011", "USE_TOOLS": "retrieve,search" } } } }

The USE_TOOLS env variable above essentially restricts the available tools to read-only operations. You can omit this variable to allow full access, but you will need a model that can handle about 200k tokens.

Consult your MCP client's documentation to determine exactly how to add an MCP server to your client.

Example Prompts

"which tools do you have access to?" should show you all the FusionAuth API tools
"how many fusionauth applications do I have?"
"how many users do I have in my fusionauth instance?"
"add a user with an email address of test@example.com and a password of 'password'" (requires less restricted tools)

Restricting Tools

The default MCP Server has a tool for every API endpoint of FusionAuth. Over 300 of them! However, the tools, descriptions, requests, and responses combine to nearly 200k tokens, which can exceed the context window of many MCP clients.

You can restrict which tools this MCP server makes available by setting the USE_TOOLS env variable as shown above.

Each tool is defined by its prefix. The default prefixes are:

create
delete
patch
update
retrieve
search

There is also an other tool bucket that contains every tool with another prefix. The all tool bucket includes all tools and is the default value.

For example, if you don't need to use any delete or patch methods, the following setting reduces the tool list by 20%.

USE_TOOLS="create,update,retrieve,search,other"

If you only want to allow read-only operations, use the following configuration:

USE_TOOLS="retrieve,search"

This also reduces the tool list size by 66%.

Securing Your MCP Server

There are three different approaches to secure your MCP server and you should combine them to enable secure access to your FusionAuth instance while still meeting your functionality needs. In order of granularity (from coarse to fine-grained):

Point to the correct instance.
Enable the correct type of tools. In addition to reducing context window usage, limiting the type of requests your LLM can make can increase security. For instance, if you don't enable the delete set of tools, you don't have to worry about the LLM "helping" you by deleting FusionAuth configuration.
Lock down your API key. This allows fine-grained control beyond the tool choice. The MCP server communicates to FusionAuth using an API key. You can limit that API key to only allow it to act on tenants, applications and users by choosing the appropriate set of permissions.

Troubleshooting

Verify your API key has the correct permissions for the operation the MCP client is taking.

Check your MCP client logs; these vary by MCP client and platform. For example, $HOME/Library/Logs/Claude/mcp-server-fusionauth-api-server.log is the location for Claude Desktop on macOS. Consult your client's documentation for the precise location.

Use the modelcontextprotocol inspector to help determine if the issue is with the MCP server or with your MCP client: npx @modelcontextprotocol/inspector. If you want to change the USE_TOOLS variable, you cannot dynamically change it and must pass it on the command line. npx @modelcontextprotocol/inspector npx @fusionauth/mcp-api -e API_KEY_APIKEYAUTH=... -e USE_TOOLS=create

Building Locally

You can also build and run this locally.

git clone https://github.com/FusionAuth/fusionauth-mcp-api.git

cd fusionauth-mcp-api cd packages/mcp-api npm install npm run build

optional step to store config information in .env file

cp .env.example .env

optionally edit .env to set API_BASE_URL and API_KEY_APIKEYAUTH

Then, similar to the instructions above, configure your MCP client to use the FusionAuth API MCP server.

For example, to add to Claude Desktop, edit ~/Library/Application Support/Claude/claude_desktop_config.json to include the fusionauth-mcp-api key below. If you don't have any previous MCP servers installed, it would look like this:

"mcpServers": { "fusionauth-mcp-api": { "command": "npm", "args": [ "run", "--silent", "--prefix", " /fusionauth-mcp-api/packages/mcp-api", "start" ], "env": { "API_KEY_APIKEYAUTH": " ", "API_BASE_URL": "http://localhost:9011", "USE_TOOLS": "retrieve,search" } } } }

You can omit the env section above if you have configured an .env file.

Publishing

bin/updatemcp.sh git commit git tag git push origin main --tags npm publish --access public --workspace=packages/mcp-api

Feedback

Please share feature requests and bugs in this repo.

If you want to share interesting use cases or ask how to use functionality, please post in the FusionAuth forum.

MCP API

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

Values you fill in

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Otheri

Common questions

Alternatives

Spec Driven Development

Remote Desktop Commander

FOGA node

README from the maker

FusionAuth API MCP Server (fusionauth-mcp-api)

Prerequisites

Configuration

Example Prompts

Restricting Tools

Securing Your MCP Server

Troubleshooting

Building Locally

optional step to store config information in .env file

optionally edit .env to set API_BASE_URL and API_KEY_APIKEYAUTH

Publishing

Feedback