A JetBrains IDE plugin that exposes an MCP (Model Context Protocol) server, enabling AI coding assistants like Claude, Codex, Cursor, and Windsurf to leverage the IDE's powerful indexing and refactoring capabilities.
Fully tested: IntelliJ IDEA, PyCharm, WebStorm, GoLand, RustRover, Android Studio, PhpStorm May work (untested): RubyMine, CLion, DataGrip
IDE Index MCP Server provides AI coding assistants with access to the IDE's powerful code intelligence features through the Model Context Protocol (MCP).
Multi-Language Support Advanced tools work across multiple languages based on available plugins:
- Java & Kotlin - IntelliJ IDEA, Android Studio
- Python - PyCharm (all editions), IntelliJ with Python plugin
- JavaScript & TypeScript - WebStorm, IntelliJ Ultimate, PhpStorm
- Go - GoLand, IntelliJ IDEA Ultimate with Go plugin
- Rust - RustRover, IntelliJ IDEA Ultimate with Rust plugin, CLion
Universal Tools (All JetBrains IDEs)
- Find References - Locate all usages of any symbol across the project
- Go to Definition - Navigate to symbol declarations
- Code Diagnostics - Access errors, warnings, and quick fixes
- Index Status - Check if code intelligence is ready
Extended Tools (Language-Aware) These tools activate based on installed language plugins:
- Type Hierarchy - Explore class inheritance chains
- Call Hierarchy - Trace method/function call relationships
- Find Implementations - Discover interface/abstract implementations
- Symbol Search - Find by name with fuzzy/camelCase matching
- Find Super Methods - Navigate method override hierarchies
Refactoring Tools
- Rename Refactoring - Safe renaming with automatic related element renaming (getters/setters, overriding methods) - works across ALL languages, fully headless
- Safe Delete - Remove code with usage checking (Java/Kotlin only)
Unlike simple text-based code analysis, this plugin gives AI assistants access to:
- True semantic understanding through the IDE's AST and index
- Cross-project reference resolution that works across files and modules
- Multi-language support - automatically detects and uses language-specific handlers
- Safe refactoring operations with automatic reference updates and undo support
Perfect for AI-assisted development workflows where accuracy and safety matter.
- Installation
- Quick Start
- Client Configuration
- Available Tools
- Multi-Project Support
- Tool Window
- Error Codes
- Requirements
- Contributing
Settings/Preferences > Plugins > Marketplace > Search for "IDE Index MCP Server" > Install
Go to JetBrains Marketplace and install it by clicking the Install to ... button.
Download the latest release and install it manually: Settings/Preferences > Plugins > ⚙️ > Install plugin from disk...
- Install the plugin and restart your JetBrains IDE
- Open a project - the MCP server starts automatically with IDE-specific defaults:
- IntelliJ IDEA:
intellij-indexon port 29170 - PyCharm:
pycharm-indexon port 29172 - WebStorm:
webstorm-indexon port 29173 - Other IDEs: See IDE-Specific Defaults
- IntelliJ IDEA:
- Configure your AI assistant using the "Install on Coding Agents" button (easiest) or manually
- Use the tool window (bottom panel: "Index MCP Server") to copy configuration or monitor commands
- Change port (optional): Click "Change port, disable tools" in the toolbar or go to Settings > Tools > Index MCP Server
The easiest way to configure your AI assistant:
- Open the "Index MCP Server" tool window (bottom panel)
- Click the prominent "Install on Coding Agents" button on the right side of the toolbar
- A popup appears with two sections:
- Install Now - For Claude Code CLI and Codex CLI: Runs the installation command automatically
- Copy Configuration - For other clients: Copies the JSON config to your clipboard
- For "Copy Configuration" clients, paste the config into the appropriate config file
Use the "Install on Coding Agents" button in the tool window, or run this command (adjust name and port for your IDE):
# IntelliJ IDEA
claude mcp add --transport http intellij-index http://127.0.0.1:29170/index-mcp/sse --scope user
# PyCharm
claude mcp add --transport http pycharm-index http://127.0.0.1:29172/index-mcp/sse --scope user
# WebStorm
claude mcp add --transport http webstorm-index http://127.0.0.1:29173/index-mcp/sse --scope userOptions:
--scope user- Adds globally for all projects--scope project- Adds to current project only
To remove: claude mcp remove <server-name> (e.g., claude mcp remove intellij-index)
Use the "Install on Coding Agents" button in the tool window, or run this command (adjust name and port for your IDE):
# IntelliJ IDEA
codex mcp add --transport sse intellij-index http://127.0.0.1:29170/index-mcp/sse
# PyCharm
codex mcp add --transport sse pycharm-index http://127.0.0.1:29172/index-mcp/sse
# WebStorm
codex mcp add --transport sse webstorm-index http://127.0.0.1:29173/index-mcp/sseTo remove: codex mcp remove <server-name> (e.g., codex mcp remove intellij-index)
Add to .cursor/mcp.json in your project root or ~/.cursor/mcp.json globally (adjust name and port for your IDE):
{
"mcpServers": {
"intellij-index": {
"url": "http://127.0.0.1:29170/index-mcp/sse"
}
}
}Add to ~/.codeium/windsurf/mcp_config.json (adjust name and port for your IDE):
{
"mcpServers": {
"intellij-index": {
"serverUrl": "http://127.0.0.1:29170/index-mcp/sse"
}
}
}{
"mcp.servers": {
"intellij-index": {
"transport": "sse",
"url": "http://127.0.0.1:29170/index-mcp/sse"
}
}
}Note: Replace the server name and port with your IDE's defaults. See IDE-Specific Defaults below.
Each JetBrains IDE has a unique default port and server name to allow running multiple IDEs simultaneously without conflicts:
| IDE | Server Name | Default Port |
|---|---|---|
| IntelliJ IDEA | intellij-index |
29170 |
| Android Studio | android-studio-index |
29171 |
| PyCharm | pycharm-index |
29172 |
| WebStorm | webstorm-index |
29173 |
| GoLand | goland-index |
29174 |
| PhpStorm | phpstorm-index |
29175 |
| RubyMine | rubymine-index |
29176 |
| CLion | clion-index |
29177 |
| RustRover | rustrover-index |
29178 |
| DataGrip | datagrip-index |
29179 |
| Aqua | aqua-index |
29180 |
| DataSpell | dataspell-index |
29181 |
| Rider | rider-index |
29182 |
Tip: Use the "Install on Coding Agents" button in the tool window - it automatically uses the correct server name and port for your IDE.
The plugin provides MCP tools organized by availability:
These tools work in all supported JetBrains IDEs.
| Tool | Description |
|---|---|
ide_find_references |
Find all references to a symbol across the entire project |
ide_find_definition |
Find the definition/declaration location of a symbol |
ide_diagnostics |
Analyze a file for problems (errors, warnings) and available intentions |
ide_index_status |
Check if the IDE is in dumb mode or smart mode |
These tools activate based on available language plugins:
| Tool | Description | Languages |
|---|---|---|
ide_type_hierarchy |
Get the complete type hierarchy (supertypes and subtypes) | Java, Kotlin, Python, JS/TS, Go, Rust |
ide_call_hierarchy |
Analyze method call relationships (callers or callees) | Java, Kotlin, Python, JS/TS, Go, Rust |
ide_find_implementations |
Find all implementations of an interface or abstract method | Java, Kotlin, Python, JS/TS, Go, Rust |
ide_find_symbol |
Search for symbols (classes, methods, fields) by name with fuzzy/camelCase matching | Java, Kotlin, Python, JS/TS, Go, Rust |
ide_find_super_methods |
Find the full inheritance hierarchy of methods that a method overrides/implements | Java, Kotlin, Python, JS/TS, Go, Rust |
| Tool | Description | Languages |
|---|---|---|
ide_refactor_rename |
Rename a symbol and update all references | All languages |
ide_refactor_safe_delete |
Safely delete an element, checking for usages first | Java/Kotlin only |
Note: Refactoring tools modify source files. All changes support undo via Ctrl/Cmd+Z.
Fully Tested:
| IDE | Universal | Navigation | Refactoring |
|---|---|---|---|
| IntelliJ IDEA | ✓ 4 tools | ✓ 5 tools | ✓ 2 tools (rename + safe delete) |
| Android Studio | ✓ 4 tools | ✓ 5 tools | ✓ 2 tools (rename + safe delete) |
| PyCharm | ✓ 4 tools | ✓ 5 tools | ✓ 1 tool (rename) |
| WebStorm | ✓ 4 tools | ✓ 5 tools | ✓ 1 tool (rename) |
| GoLand | ✓ 4 tools | ✓ 5 tools | ✓ 1 tool (rename) |
| RustRover | ✓ 4 tools | ✓ 5 tools | ✓ 1 tool (rename) |
| PhpStorm | ✓ 4 tools | - | ✓ 1 tool (rename) |
May Work (Untested):
| IDE | Universal | Navigation | Refactoring |
|---|---|---|---|
| RubyMine | ✓ 4 tools | - | ✓ 1 tool (rename) |
| CLion | ✓ 4 tools | - | ✓ 1 tool (rename) |
| DataGrip | ✓ 4 tools | - | ✓ 1 tool (rename) |
Note: Navigation tools (type hierarchy, call hierarchy, find implementations, symbol search, find super methods) are available when language plugins are present. The rename tool works across all languages.
For detailed tool documentation with parameters and examples, see USAGE.md.
When multiple projects are open in a single IDE window, you must specify which project to use with the project_path parameter:
{
"name": "ide_find_references",
"arguments": {
"project_path": "/Users/dev/myproject",
"file": "src/Main.kt",
"line": 10,
"column": 5
}
}If project_path is omitted:
- Single project open: That project is used automatically
- Multiple projects open: An error is returned with the list of available projects
The plugin supports workspace projects where a single IDE window contains multiple sub-projects as modules with separate content roots. The project_path parameter accepts:
- The workspace root path
- A sub-project path (module content root)
- A subdirectory of any open project
When an error occurs, the response includes all available sub-projects so AI agents can discover the correct paths to use.
The plugin adds an "Index MCP Server" tool window (bottom panel) that shows:
- Server Status: Running indicator with server URL and port
- Project Name: Currently active project
- Command History: Log of all MCP tool calls with:
- Timestamp
- Tool name
- Status (Success/Error/Pending)
- Parameters and results (expandable)
- Execution duration
| Action | Description |
|---|---|
| Refresh | Refresh server status and command history |
| Copy URL | Copy the MCP server URL to clipboard |
| Clear History | Clear the command history |
| Export History | Export history to JSON or CSV file |
| Install on Coding Agents | Install MCP server on AI assistants (prominent button on right) |
| Code | Name | Description |
|---|---|---|
| -32700 | Parse Error | Failed to parse JSON-RPC request |
| -32600 | Invalid Request | Invalid JSON-RPC request format |
| -32601 | Method Not Found | Unknown method name |
| -32602 | Invalid Params | Invalid or missing parameters |
| -32603 | Internal Error | Unexpected internal error |
| Code | Name | Description |
|---|---|---|
| -32001 | Index Not Ready | IDE is in dumb mode (indexing in progress) |
| -32002 | File Not Found | Specified file does not exist |
| -32003 | Symbol Not Found | No symbol found at the specified position |
| -32004 | Refactoring Conflict | Refactoring cannot be completed (e.g., name conflict) |
Configure the plugin at Settings > Tools > Index MCP Server:
| Setting | Default | Description |
|---|---|---|
| Server Port | IDE-specific | MCP server port (range: 1024-65535, auto-restart on change). See IDE-Specific Defaults |
| Max History Size | 100 | Maximum number of commands to keep in history |
| Sync External Changes | false | Sync external file changes before operations |
- JetBrains IDE 2025.1 or later (any IDE based on IntelliJ Platform)
- JVM 21 or later
- MCP Protocol 2024-11-05
Fully Tested:
- IntelliJ IDEA (Community/Ultimate)
- Android Studio
- PyCharm (Community/Professional)
- WebStorm
- GoLand
- RustRover
- PhpStorm
May Work (Untested):
- RubyMine
- CLion
- DataGrip
The plugin uses standard IntelliJ Platform APIs and should work on any IntelliJ-based IDE, but has only been tested on the IDEs listed above.
The plugin runs a custom embedded Ktor CIO HTTP server with dual MCP transports:
AI Assistant ──────► GET /index-mcp/sse (establish SSE stream)
◄── event: endpoint (receive POST URL with sessionId)
──────► POST /index-mcp?sessionId=x (JSON-RPC requests)
◄── HTTP 202 Accepted
◄── event: message (JSON-RPC response via SSE)
AI Assistant ──────► POST /index-mcp (JSON-RPC requests)
◄── JSON-RPC response (immediate HTTP response)
This dual approach:
- MCP Inspector compatible - Full SSE transport per MCP spec (2024-11-05)
- Claude Code compatible - Streamable HTTP for simple request/response
- Configurable port - Default 29277, changeable in settings
- Works with any MCP-compatible client
- Single server instance across all open projects
Contributions are welcome! Please:
- Fork the repository
- Create a feature branch
- Make your changes
- Run tests:
./gradlew test - Submit a pull request
# Build the plugin
./gradlew build
# Run IDE with plugin installed
./gradlew runIde
# Run tests
./gradlew test
# Run plugin verification
./gradlew runPluginVerifierThis project is licensed under the Apache License 2.0 - see the LICENSE file for details.
Plugin based on the IntelliJ Platform Plugin Template.