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MCP-Grep

by erniebrodeur
GitHub
Python
GPL 3.0
1
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Integrations

  • Exposes the system grep binary functionality through MCP, allowing for searching patterns in files using regular expressions, with support for case-insensitive matching, context lines, maximum match count, fixed string matching, and recursive directory searching.

  • Mentioned as part of the development workflow, but not as a primary integration target for the MCP server.

  • Used for implementation and client access, but not as a primary integration target for the MCP server.

MCP-Grep

A grep server implementation that exposes grep functionality through the Model Context Protocol (MCP).

Installation

pip install mcp-grep

Usage

MCP-Grep runs as a server that can be used by MCP-compatible clients:

# Start the MCP-Grep server mcp-grep-server # Or use the MCP Inspector for interactive debugging and testing mcp-grep-inspector

The server exposes the following MCP functionality:

  • Resource: grep://info - Returns information about the system grep binary
  • Tool: grep - Searches for patterns in files using the system grep binary

Features

  • Information about the system grep binary (path, version, supported features)
  • Search for patterns in files using regular expressions
  • Support for common grep options:
    • Case-insensitive matching
    • Context lines (before and after matches)
    • Maximum match count
    • Fixed string matching (non-regex)
    • Recursive directory searching
  • Natural language prompt understanding for easier use with LLMs
  • Interactive debugging and testing through MCP Inspector

Example API Usage

Using the MCP Python client:

from mcp.client import MCPClient # Connect to the MCP-Grep server client = MCPClient() # Get information about the grep binary grep_info = client.get_resource("grep://info") print(grep_info) # Search for a pattern in files result = client.use_tool("grep", { "pattern": "search_pattern", "paths": ["file.txt", "directory/"], "ignore_case": True, "recursive": True }) print(result)

Natural Language Prompts

MCP-Grep understands natural language prompts, making it easier to use with LLMs. Examples:

# Basic search Search for 'error' in log.txt # Case-insensitive search Find all instances of 'WARNING' regardless of case in system.log # With context lines Search for 'exception' in error.log and show 3 lines before and after each match # Recursive search Find all occurrences of 'deprecated' in the src directory and its subdirectories # Fixed string search (non-regex) Search for the exact string '.*' in config.js # Limited results Show me just the first 5 occurrences of 'TODO' in the project files # Multiple options Find 'password' case-insensitively in all .php files, show 2 lines of context, and limit to 10 results

MCP Inspector Integration

MCP-Grep includes an MCP Inspector integration for interactive debugging and testing:

# Start the MCP Inspector with MCP-Grep mcp-grep-inspector

This opens a web-based UI where you can:

  • Explore available resources and tools
  • Test grep operations with different parameters
  • View formatted results
  • Debug issues with your grep queries

Development

# Clone the repository git clone https://github.com/erniebrodeur/mcp-grep.git cd mcp-grep # Install in development mode pip install -e ".[dev]" # Run tests pytest

License

MIT

This server cannot be installed

-
security - not tested
A
license - permissive license
-
quality - not tested

local-only server

The server can only run on the client's local machine because it depends on local resources.

A server implementation that exposes grep functionality through the Model Context Protocol, allowing MCP-compatible clients to search for patterns in files using regular expressions.

  1. Installation
    1. Usage
      1. Features
        1. Example API Usage
          1. Natural Language Prompts
            1. MCP Inspector Integration
              1. Development
                1. License

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