# 🔧 Fixing MCP Module Error on Vercel
## Problem
```
ModuleNotFoundError: No module named 'mcp'
```
This happens because:
1. Your code has a folder called `mcp/` (local module)
2. You're also importing from Python package `mcp` (third-party)
3. Namespace conflict + Vercel may not install dependencies correctly
## ✅ Fixes Applied
### 1. Added `__init__.py` to `mcp/` folder
- Makes it a proper Python package
- Helps Python distinguish between local module and package
### 2. Updated `requirements.txt`
- Pinned versions for better reliability
- `mcp>=1.0.0` explicitly specified
### 3. Fixed Vercel Configuration
- Already have `app.py` entry point
- `vercel.json` configured correctly
## 🚀 Next Steps
### Option 1: Redeploy on Vercel (Try This First)
1. **Commit the changes:**
- `mcp/__init__.py` (new file)
- `requirements.txt` (updated)
2. **Push to GitHub** (if connected) or redeploy manually
3. **Redeploy on Vercel**
- Go to Vercel Dashboard
- Click "Redeploy" on latest deployment
4. **Test again**
- Should work now!
### Option 2: Alternative - Check if MCP Package Name is Correct
The package might be named differently. Check:
```bash
pip search mcp
# OR
pip install mcp --dry-run
```
If it's a different name, update `requirements.txt`:
```txt
mcp-sdk # or whatever the correct name is
```
### Option 3: Use Render/Railway Instead (Recommended)
Vercel serverless functions have limitations:
- ❌ May have issues with subprocess (MCP server)
- ❌ File system access limited
- ❌ Execution time limits
**Better alternatives:**
- ✅ **Render.com** - Better Python support, free tier
- ✅ **Railway.app** - Easy deployment, works great with FastAPI
---
## 🔍 Verify the Fix
After redeploying, check Vercel logs:
1. Go to Vercel Dashboard → Your Project
2. Deployments → Latest → Logs
3. Look for:
- ✅ No `ModuleNotFoundError`
- ✅ Server starts successfully
- ✅ `/reason` endpoint works
---
## 📝 What Changed
**Files modified:**
- ✅ `mcp/__init__.py` - Created (makes folder a package)
- ✅ `requirements.txt` - Updated with versions
**Files already correct:**
- ✅ `app.py` - Entry point exists
- ✅ `vercel.json` - Configuration correct
---
## ⚠️ If Still Not Working
If the error persists after redeploy:
1. **Check Vercel build logs** for dependency installation errors
2. **Verify package name** - The `mcp` package might have a different name on PyPI
3. **Consider Render/Railway** - Better suited for Python apps with subprocess needs
---
**Redeploy and test! The `__init__.py` file should fix the namespace issue.** 🚀
