Reflex code search MCP server

Reflex is a local search tool for code. It builds an index of your project on your own computer, then answers questions about it fast, without sending anything to the cloud. It is handy if you work with a large codebase and want your AI assistant to find things in it.

What this MCP server does

You ask your AI a question about your code, like where a function is defined or what uses a file. Your AI calls Reflex through this helper. Reflex looks in its local index of your project and finds the matching lines, symbols, or imports. The answer comes back into your chat as a list with file names and line numbers. You do not have to run any search command yourself.

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What you can do with it

• Find where a function, class, or variable is defined
• List every place a symbol is used across the project
• See what a file imports, and what imports it
• Spot circular dependencies and unused files
• Search with plain text, whole words, or patterns
• Count matches without pulling in all the file content
• Get a quick summary of your project structure

Try asking your AI

• “Where is the function extract_symbols defined?”
• “Find every place CacheManager is used in this project”
• “What does src/main.rs import?”
• “Are there any circular dependencies in this codebase?”

What it gives back to you

You get back lists of file paths with line numbers, short snippets of the matching code, and counts. Sometimes it returns a summary, like the most-imported files or the imports of one file. The results appear right in your chat as text you can read. If nothing matches, it often tells you why, such as the word being part of a longer name.

Before you start

Who it's for

Developers and anyone who works with a large codebase and wants their AI assistant to search it accurately.