Expo MCP Server
A Model Context Protocol server that provides development and debugging tools for Expo-based React Native applications, enabling developers to manage Expo servers, capture logs, and manipulate project files.
Tools
readFile
Read the contents of a file
writeFile
Write content to a file
listFiles
List files in a directory
expoStart
Start an Expo development server
expoLogs
Get logs from the running Expo server
expoStop
Stop the running Expo development server
expoStatus
Check if an Expo server is running and get its status
expoGetLogs
Get filtered logs from the Expo server with advanced options
expoLogStats
Get statistics about the expo logs
expoClearLogs
Clear all stored logs
listTools
List all available tools in this MCP server
README
Expo MCP Server
A Model Context Protocol (MCP) server that provides development and debugging tools for Expo-based React Native applications. This project integrates logging, process management, and file tooling to streamline automation and AI-based workflows.
Features
- Start, stop, and monitor Expo development servers
- Capture and filter
stdout/stderrlogs - Read, write, and list files in the project directory
- Query log statistics and clear logs
- Extendable via custom MCP tools
- Includes a packed single-file representation for AI processing (via Repomix)
Usage
CLI
npm run build
npm start
Development
npm run dev
Testing
npm run inspect
Available Tools
| Tool Name | Description |
|---|---|
expoStart |
Start Expo dev server (iOS by default) |
expoStop |
Stop running Expo dev server |
expoStatus |
Show status and logs for Expo server |
expoLogs |
Retrieve recent Expo logs |
expoGetLogs |
Filtered logs with advanced options |
expoLogStats |
Summary statistics of current logs |
expoClearLogs |
Clear all stored logs |
readFile |
Read contents of a file |
writeFile |
Write content to a file |
listFiles |
List files in a directory |
listTools |
List all tools registered in the server |
Installation
npm install
Build
npm run build
Known Issues / To-Do
- MCP server shutdown does not always kill the child Expo process
- Relies on global state to track process existence; should verify by PID instead
- Logs are not helpful when the server fails to start; improve error diagnostics
- Clients misunderstand
expoLogsusage, leading to incorrect assumptions and unnecessary restarts - Should query logs from persisted log files instead of in-memory child process events for robustness
npm run startis... unkillable?
License
MIT
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