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Grep App MCP Server

Provides cross-repo code search and retrieval from public GitHub repositories via the grep.app API.

Installation

Add the following to your MCP client configuration file.

Configuration

{
  "mcpServers": {
    "ai-tools-all-grep_app_mcp": {
      "url": "http://localhost:8603/mcp"
    }
  }
}

You can use this MCP server to search and fetch code from millions of public GitHub repositories with fast, flexible queries. It exposes HTTP and STDIO interfaces so you can integrate it with Claude Code or run it locally for rapid code discovery and learning from open source projects.

How to use

You connect to the server from your MCP client either over HTTP or by running a local STDIO instance. Use the HTTP endpoint to perform streaming-enabled MCP requests, or run the STDIO server for direct integration with your tooling. Typical workflows include searching for code patterns, fetching individual files, and batch retrieving multiple files from results.

How to install

Prerequisites: verify you have Node.js 18 or newer and npm installed.

1. Clone the project and navigate into the directory.

2. Install dependencies.

3. Build the project.

4. Run the server in HTTP or STDIO mode depending on your needs.

Configuration and usage notes

HTTP mode provides a remote MCP endpoint that you can query from your MCP client. The endpoint is ready to use after you start the server.

STDIO mode lets you integrate directly with your tooling by using a local process. The example command starts the STDIO server and exposes an interface for MCP requests.

Logging is enabled with daily rotation and stores logs in the logs/ directory for easy troubleshooting.

HTTP and STDIO MCP configurations

The server can be connected in two ways. Use the HTTP endpoint when you want a remote, streaming MCP interface. Use the STDIO interface for tight integration with your local tooling.

Examples of common tasks

Search for code patterns across public GitHub repositories
Fetch a single file from a repository
Fetch multiple files in parallel
Retrieve files from a previous search result
Filter results by language, repository, path, or other criteria

Available tools

searchCode

Search code across public GitHub repositories with flexible filtering and multiple output formats.

github_file

Fetch a single file from a GitHub repository using owner, repo, path, and optional ref.

github_batch_files

Fetch multiple files from GitHub repositories in parallel.

batch_retrieve_files

Retrieve files from previously cached search results by specifying the original query and result indices.