mgrep

mgrep

A calm, CLI-native way to semantically grep everything, like code, images, pdfs and more.

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Why mgrep?

• Natural-language search that feels as immediate as grep.
• Semantic, multilingual & multimodal (audio, video support coming soon!)
• Web search built-in — query the web alongside your local files with --web.
• Smooth background indexing via mgrep watch, designed to detect and keep up-to-date everything that matters inside any git repository.
• Friendly device-login flow and first-class coding agent integrations.
• Built for agents and humans alike, and designed to be a helpful tool, not a restrictive harness: quiet output, thoughtful defaults, and escape hatches everywhere.
• Reduces the token usage of your agent by 2x while maintaining superior performance

# index once
mgrep watch

# then ask your repo things in natural language
mgrep "where do we set up auth?"

Quick Start

1. Install

   npm install -g @mixedbread/mgrep    # or pnpm / bun
   

2. Sign in once

   mgrep login
   

   A browser window (or verification URL) guides you through Mixedbread authentication.

   Alternative: API Key Authentication For CI/CD or headless environments, set the MXBAI_API_KEY environment variable:

   export MXBAI_API_KEY=your_api_key_here
   

   This bypasses the browser login flow entirely.

3. Index a project

   cd path/to/repo
   mgrep watch
   

   watch performs an initial sync, respects .gitignore, then keeps the Mixedbread store updated as files change.

4. Search anything

   mgrep "where do we set up auth?" src/lib
   mgrep -m 25 "store schema"
   

   Searches default to the current working directory unless you pass a path.

Today, mgrep works great on: code, text, PDFs, images.
Coming soon: audio & video.

Using it with Coding Agents

[!CAUTION] Background Sync Enabled: When installed with a coding agent, mgrep runs a background process that syncs your files to enable semantic search. This process starts automatically when you begin a session and stops when your session ends. You can see your current usage in the Mixedbread platform.

[!NOTE] Default Limits: mgrep enforces default limits to ensure optimal performance:

• Maximum file size: 1MB per file
• Maximum file count: 1,000 files per directory

These limits can be customized via CLI flags (--max-file-size, --max-file-count), environment variables, or config files. See the Configuration section for details.

If you prefer to manually start the file watcher instead of relying on the agent's automatic background sync, you can run:

mgrep watch /path/to/your/project

This gives you explicit control over when indexing occurs and which directories are watched.

mgrep supports assisted installation commands for many agents:

• mgrep install-claude-code for Claude Code
• mgrep install-opencode for OpenCode
• mgrep install-codex for Codex
• mgrep install-droid for Factory Droid

These commands sign you in (if needed) and add Mixedbread mgrep support to the agent. After that you only have to start the agent in your project folder, thats it.

More Agents Coming Soon

More agents (Cursor, Windsurf, etc.) are on the way—this section will grow as soon as each integration lands.

Making your agent smarter

We plugged mgrep into Claude Code and ran a benchmark of 50 QA tasks to evaluate the economics of mgrep against grep.

In our 50-task benchmark, mgrep+Claude Code used ~2x fewer tokens than grep-based workflows at similar or better judged quality.