Limitless MCP Server (v0.1.0)

This is an MCP (Model Context Protocol) server that connects your Limitless Pendant data to AI tools like Claude, Windsurf, and others via the Limitless API. It lets AI chat interfaces and agents interact with your Lifelog in a structured, programmable way. Let’s build towards a more organized, intelligent future—one context-rich interaction at a time.

What’s MCP?
Model Context Protocol is an open standard for connecting AI models to external tools and data—think of it like the USB-C port or even the HTTP protocol for AI—universal, reliable, and designed for extensibility. The standard that everyone adopts. It enables rich integrations, custom workflows, and seamless communication between AI and the tools you use every day.

IMPORTANT NOTE: As of March 2025, the Limitless API requires data recorded via the Limitless Pendant. This server depends on real data recorded from your Limitless Pendant—it won’t return anything meaningful without it. Ensure your Pendant is connected and recording.

API Status & Future Plans:

The official Limitless API is currently in beta. As such, it may occasionally be unreliable, subject to change, or experience temporary outages.
Requesting large amounts of data (e.g., listing or searching hundreds of logs) may sometimes result in timeout errors (like 504 Gateway Time-out) due to API or network constraints. The server includes a 120-second timeout per API call to mitigate this, but very large requests might still fail.
The Limitless API is under active development. This MCP server will be updated with new features and improvements as they become available in the official API.
Version 0.2.0 of this MCP server is already under development, with plans to add more robust features and potentially new tools in the near future!

Features (v0.1.0)

List/Get Lifelogs: Retrieve Pendant recordings by ID, date, date range, or list recent entries. Includes control over sort direction (asc/desc).
Search Recent Logs: Perform simple text searches within the content of a configurable number of recent Pendant recordings (Note: only recent logs are searchable; full-history search is not supported).

With this server, you can do things like pull action items from your Lifelog and send them directly into Notion—via Claude, ChatWise, Windsurf, or any other AI assistant/app that supports MCP.

Prerequisites

Node.js (v18 or later required)
npm or yarn
A Limitless account and API key (Get one here)
A Limitless Pendant (Required for data)
An MCP Client application (e.g., Claude, Windsurf, Cursor, ChatWise, ChatGPT (coming soon!)) capable of spawning stdio servers and passing environment variables.

Setup

Clone or download this project.
Navigate to the directory:
```
cd mcp-limitless-server
```
Install dependencies:
```
npm install
```
Build the code:
```
npm run build
```

Configuration (Client-Side)

This server expects the LIMITLESS_API_KEY to be provided as an environment variable when it is launched by your MCP client.

You need to add a server configuration block to your MCP client's settings file. Below are two examples depending on whether you are adding this as your first server or adding it alongside existing servers.

Example A: Adding as the first/only server

If your client's configuration file currently has an empty mcpServers object ("mcpServers": {}), replace it with this:

{
  "mcpServers": {
    "limitless": {
      "command": "node",
      "args": ["<FULL_FILE_PATH_TO_DIST_SERVER.js>"],
      "env": {
        "LIMITLESS_API_KEY": "<YOUR_LIMITLESS_API_KEY_HERE>"
      }
    }
  }
}

Example B: Adding to existing servers

If your mcpServers object already contains other servers (like "notion": {...}), add the "limitless" block alongside them, ensuring correct JSON syntax (commas between entries):

{
  "mcpServers": {
    "some_other_server": {
      "command": "...",
      "args": ["..."],
      "env": {
        "EXAMPLE_VAR": "value"
      }
    },
    "limitless": {
      "command": "node",
      "args": ["<FULL_FILE_PATH_TO_DIST_SERVER.js>"],
      "env": {
        "LIMITLESS_API_KEY": "<YOUR_LIMITLESS_API_KEY_HERE>"
      }
    }
  }
}

Important:

Replace <FULL_FILE_PATH_TO_DIST_SERVER.js> with the correct, absolute path to the built server script (e.g., /Users/yourname/Documents/MCP/mcp-limitless-server/dist/server.js). Relative paths might not work reliably depending on the client.
Replace <YOUR_LIMITLESS_API_KEY_HERE> with your actual Limitless API key.
MCP config files cannot contain comments. Remove any placeholder text like <YOUR_LIMITLESS_API_KEY_HERE> and replace it with your actual key.

Running the Server (via Client)

Do not run npm start directly.

Ensure the server is built successfully (npm run build).
Configure your MCP client as shown above.
Start your MCP client application. It will launch the mcp-limitless-server process automatically when needed.

Exposed MCP Tools (v0.1.0)

(Refer to src/server.ts or ask the server via your client for full details.)

limitless_get_lifelog_by_id: Retrieves a single Pendant recording by its specific ID.
limitless_list_lifelogs_by_date: Lists Pendant recordings for a specific date.
limitless_list_lifelogs_by_range: Lists Pendant recordings within a date/time range.
limitless_list_recent_lifelogs: Lists the most recent Pendant recordings.
limitless_search_lifelogs: Searches title/content of recent Pendant recordings (limited scope!).

Notes & Limitations

🚫 Pendant Required
This server depends on data generated by the Limitless Pendant.

🧪 API Beta Status
The Limitless API is in beta and may experience occasional instability or rate limiting. Large requests might result in timeouts (e.g., 504 errors).

🔍 Search Scope
limitless_search_lifelogs only scans a limited number of recent logs (default 20, max 100). It does not search your full history — use listing tools first for broader analysis.

⚠️ Error Handling & Timeout
API errors are translated into MCP error results. Each API call has a 120-second timeout.

🔌 Transport
This server uses stdio and is meant to be launched by an MCP-compatible client app.

Contributing

Have ideas, improvements, or feedback? Feel free to open an issue or PR—contributions are always welcome! Let’s keep pushing the boundaries of what’s possible with wearable context and intelligent tools. https://github.com/ipvr9/mcp-limitless-server