osinmv/funciton-lookup-mcp
🐍 🏠 🍎 🐧 - MCP server for function signature lookups.
Quick Install
{
"mcpServers": {
"osinmv-funciton-lookup-mcp": {
"command": "npx",
"args": [
"-y",
"osinmv-funciton-lookup-mcp"
]
}
}
}Using an AI coding agent (Claude Code, Cursor, etc.)? Copy a ready-made prompt that tells it to fetch the setup instructions and install this server for you.
Documentation Overview
Code Declaration Lookup MCP Server
An MCP server that provides full text search for code declarations. Uses SQLite with FTS5 and universal ctags to index and search functions, classes, structures, enums, and other code elements. Supports all languages that ctags supports including Python, C, Go, C++, JavaScript, Rust, Java, and many others.
Requirements
- Python 3.13
- Universal Ctags 6.2.0
- SQLite with FTS5 support (included in Python 3.13)
Installation
git clone git@github.com:osinmv/function-lookup-mcp.git
cd function-lookup-mcp
claude mcp add api-lookup $(pwd)/run.sh -s user
Extending the Index
Just ask your coding agent to index your header folder. The indexing process respects your project's .gitignore file to avoid indexing unwanted files. Alternatively, you can generate ctags files manually using universal ctags:
ctags --output-format=json --fields=+Sf --kinds-C=+p -R -f apis/your_api.ctags /path/to/your/headers
Or drop existing ctags files into the apis/ folder and restart the MCP server to update the index.
MCP functions
search_declarations(name: str, offset: int = 0, limit: int = 10) - Search for code declarations by name
list_indexed_apis() - List all indexed API files
list_api_files(api_name: str, offset: int = 0, limit: int = 100) - List all unique file paths for a specific API
list_functions_by_file(file_path: str, offset: int = 0, limit: int = 100) - List all functions found in a specific file
generate_ctags(include_directory: str) - Generate ctags from source files and add to index