# MCP in Cursor
SUMMARY: Connect Synapse to Cursor IDE for persistent project memory across coding sessions.

MCP in Cursor
Cursor is an AI-powered IDE based on VS Code. With Synapse MCP, Cursor gains
persistent memory across sessions — it remembers your project decisions,
codebase patterns, and past debugging sessions.
Prerequisites
- Cursor IDE installed (<https://cursor.com>)
- Node.js 18+
- Your Synapse Mind Key
Setup
Step 1: Open Cursor Settings
In Cursor:
1. Open Settings (Cmd+, on macOS, Ctrl+, on Windows/Linux)
2. Search for "MCP" or navigate to 
Step 2: Add Synapse MCP Server
Click "Add MCP Server" and configure:
| Field | Value |
|-------|-------|
| Name |  |
| Type |  |
| Command |  |
| Env |  |
Step 3: Edit config.json directly (alternative)
Cursor stores MCP config in :
[CODE BLOCK]
Step 4: Restart Cursor
Fully restart Cursor (Cmd+Q and reopen on macOS).
Verify It Works
In Cursor's chat panel (Cmd+L):
[CODE BLOCK]
Cursor should call  and respond with your stored memories.
Common Patterns
Project onboarding
When opening a new project:
[CODE BLOCK]
Cursor calls  and continues work where you left off.
Architecture decisions
[CODE BLOCK]
Cursor stores it as a  memory with  priority.
Debugging history
[CODE BLOCK]
Cursor searches for  memories and reminds you of past fixes.
Cross-session code patterns
[CODE BLOCK]
Cursor finds memories about auth implementations you've done before.
Troubleshooting
MCP server not connecting
1. Verify Node.js:  (≥ 18)
2. Test MCP server:  (should start without errors)
3. Check Cursor's MCP logs (View → Output → MCP)
4. Restart Cursor fully
Tools not appearing
- Check  is valid JSON
- Verify  env var is set
- Check Cursor version supports MCP (≥ 0.42)
Mind Key invalid
[CODE BLOCK]
Next Steps
- Claude Desktop Setup
- Continue.dev Setup
- Persistent LLM Agent Guide