Memex (Firecrawl & Voyage) MCP server for AI agents

Memex is a powerful tool for the Model Context Protocol (MCP) that helps you analyze web content and build a knowledge base from it. It processes web pages, extracts valuable information, and stores it as Markdown files that you can reference when asking questions to Claude or other AI assistants.

Prerequisites

Before installing Memex, you'll need API keys for the following services:

While any Markdown viewer will work with the knowledge base Memex creates, Obsidian is recommended for the best experience.

Installation

Install the Memex package using pip:

pip install mcp-memex

Configuration

Add Memex to your Claude Desktop configuration by updating your claude_desktop_config.json file with the following settings:

{
  "mcpServers": {
    "memex": {
      "command": "uv",
      "args": [
        "--directory",
        "PATH_TO_LOCAL_MEMEX_REPO",
        "run",
        "mcp-memex",
        "--index",
        "PATH_TO_MEMEX_INDEX",
        "--workspace",
        "PATH_TO_OBSIDIAN_VAULT"
      ],
      "env": {
        "ANTHROPIC_API_KEY": "YOUR-API-KEY",
        "FIRECRAWL_API_KEY": "YOUR-API-KEY",
        "VOYAGE_API_KEY": "YOUR-API-KEY"
      }
    }
  }
}

Make sure to replace the placeholder values:

PATH_TO_LOCAL_MEMEX_REPO: The path to your local Memex repository
PATH_TO_MEMEX_INDEX: Where you want Memex to store its index
PATH_TO_OBSIDIAN_VAULT: The path to your Obsidian vault
Replace all YOUR-API-KEY values with your actual API keys

Using Memex

Analyzing Web Content

To analyze web content with Memex, simply ask Claude a question and include one or more URLs in quotation marks:

What is the capital of France? "https://en.wikipedia.org/wiki/France"

Memex will:

Fetch and process the content from the provided URL
Extract relevant information
Add it to your knowledge base in the Obsidian vault

Querying Your Knowledge Base

After Memex has analyzed web content, you can ask questions about that content without providing the URL again:

What is the capital of France?

Claude will use the information stored in your Memex knowledge base to provide an answer.

Viewing Your Knowledge Base

Open your Obsidian vault to browse through the Markdown files Memex has created. The knowledge base is organized in a way that makes it easy to navigate and search for specific information.

How to install this MCP server

For Claude Code

To add this MCP server to Claude Code, run this command in your terminal:

claude mcp add-json "memex" '{"command":"uv","args":["--directory","PATH_TO_LOCAL_MEMEX_REPO","run","mcp-memex","--index","PATH_TO_MEMEX_INDEX","--workspace","PATH_TO_OBSIDIAN_VAULT"],"env":{"ANTHROPIC_API_KEY":"YOUR-API-KEY","FIRECRAWL_API_KEY":"YOUR-API-KEY","VOYAGE_API_KEY":"YOUR-API-KEY"}}'

See the official Claude Code MCP documentation for more details.

For Cursor

There are two ways to add an MCP server to Cursor. The most common way is to add the server globally in the ~/.cursor/mcp.json file so that it is available in all of your projects.

If you only need the server in a single project, you can add it to the project instead by creating or adding it to the .cursor/mcp.json file.

Adding an MCP server to Cursor globally

To add a global MCP server go to Cursor Settings > Tools & Integrations and click "New MCP Server".

When you click that button the ~/.cursor/mcp.json file will be opened and you can add your server like this:

{
    "mcpServers": {
        "memex": {
            "command": "uv",
            "args": [
                "--directory",
                "PATH_TO_LOCAL_MEMEX_REPO",
                "run",
                "mcp-memex",
                "--index",
                "PATH_TO_MEMEX_INDEX",
                "--workspace",
                "PATH_TO_OBSIDIAN_VAULT"
            ],
            "env": {
                "ANTHROPIC_API_KEY": "YOUR-API-KEY",
                "FIRECRAWL_API_KEY": "YOUR-API-KEY",
                "VOYAGE_API_KEY": "YOUR-API-KEY"
            }
        }
    }
}

Adding an MCP server to a project

To add an MCP server to a project you can create a new .cursor/mcp.json file or add it to the existing one. This will look exactly the same as the global MCP server example above.

How to use the MCP server

Once the server is installed, you might need to head back to Settings > MCP and click the refresh button.

The Cursor agent will then be able to see the available tools the added MCP server has available and will call them when it needs to.

You can also explicitly ask the agent to use the tool by mentioning the tool name and describing what the function does.

For Claude Desktop

To add this MCP server to Claude Desktop:

1. Find your configuration file:

macOS: ~/Library/Application Support/Claude/claude_desktop_config.json
Windows: %APPDATA%\Claude\claude_desktop_config.json
Linux: ~/.config/Claude/claude_desktop_config.json

2. Add this to your configuration file:

{
    "mcpServers": {
        "memex": {
            "command": "uv",
            "args": [
                "--directory",
                "PATH_TO_LOCAL_MEMEX_REPO",
                "run",
                "mcp-memex",
                "--index",
                "PATH_TO_MEMEX_INDEX",
                "--workspace",
                "PATH_TO_OBSIDIAN_VAULT"
            ],
            "env": {
                "ANTHROPIC_API_KEY": "YOUR-API-KEY",
                "FIRECRAWL_API_KEY": "YOUR-API-KEY",
                "VOYAGE_API_KEY": "YOUR-API-KEY"
            }
        }
    }
}

3. Restart Claude Desktop for the changes to take effect