# MCP Server Troubleshooting Guide
## Error: "SSE error: Invalid content type, expected 'text/event-stream'"
This error means Claude Desktop can't communicate with the MCP server. Here's how to fix it:
### Solution 1: Fix Claude Desktop Configuration
**The issue:** Your config might have incorrect paths or Python command.
**Edit:** `C:\Users\V0411759\AppData\Roaming\Claude\claude_desktop_config.json`
**Use this configuration:**
```json
{
"mcpServers": {
"log-analyzer": {
"command": "python",
"args": [
"-u",
"-m",
"server"
],
"cwd": "c:\\Users\\V0411759\\Documents\\AI TEST\\log-analyzer-mcp",
"env": {
"PYTHONUNBUFFERED": "1",
"LOG_FOLDER": "c:\\Users\\V0411759\\Documents\\AI TEST\\log-analyzer-mcp\\logs"
}
}
}
}
```
**Key fixes:**
- Added `-u` flag for unbuffered output
- Added `PYTHONUNBUFFERED=1` environment variable
- Used absolute paths with proper escaping
### Solution 2: Verify Python Path
```powershell
# Find your Python path
where python
# Test if Python works
python --version
```
If Python is not in PATH, use full path in config:
```json
{
"mcpServers": {
"log-analyzer": {
"command": "C:\\Users\\V0411759\\AppData\\Local\\Programs\\Python\\Python313\\python.exe",
"args": ["-u", "-m", "server"],
"cwd": "c:\\Users\\V0411759\\Documents\\AI TEST\\log-analyzer-mcp"
}
}
}
```
### Solution 3: Install Dependencies
```powershell
cd "c:\Users\V0411759\Documents\AI TEST\log-analyzer-mcp"
pip install -r requirements.txt
```
### Solution 4: Test Server Manually
```powershell
cd "c:\Users\V0411759\Documents\AI TEST\log-analyzer-mcp"
python -u -m server
```
**Expected output:**
```
Starting Log Analyzer MCP Server...
Using local embedding model: all-MiniLM-L6-v2
Log folder: c:\Users\V0411759\Documents\AI TEST\log-analyzer-mcp\logs
```
**If you see errors:** Check the error message and fix dependencies.
### Solution 5: Check Claude Desktop Logs
**Location:** `%APPDATA%\Claude\logs\`
**Open latest log file and look for:**
- Python errors
- Module import errors
- Path issues
### Solution 6: Simplified Config (Try This First!)
Use the startup script:
```json
{
"mcpServers": {
"log-analyzer": {
"command": "cmd",
"args": [
"/c",
"c:\\Users\\V0411759\\Documents\\AI TEST\\log-analyzer-mcp\\start_server.bat"
]
}
}
}
```
### Solution 7: Use Full Python Path
Find your Python installation:
```powershell
Get-Command python | Select-Object -ExpandProperty Definition
```
Then use the full path:
```json
{
"mcpServers": {
"log-analyzer": {
"command": "C:\\Python311\\python.exe",
"args": ["-u", "-m", "server"],
"cwd": "c:\\Users\\V0411759\\Documents\\AI TEST\\log-analyzer-mcp"
}
}
}
```
## Step-by-Step Fix
### Step 1: Verify Dependencies
```powershell
cd "c:\Users\V0411759\Documents\AI TEST\log-analyzer-mcp"
pip list | Select-String -Pattern "mcp|faiss|sentence"
```
**Expected output:**
```
faiss-cpu 1.7.4
mcp 0.9.0
sentence-transformers 2.2.0
```
**If missing:**
```powershell
pip install -r requirements.txt
```
### Step 2: Test Server
```powershell
python -u -m server
```
**Should NOT exit immediately.** Press Ctrl+C to stop.
### Step 3: Update Claude Config
Use this EXACT configuration:
```json
{
"mcpServers": {
"log-analyzer": {
"command": "python",
"args": [
"-u",
"-m",
"server"
],
"cwd": "c:\\Users\\V0411759\\Documents\\AI TEST\\log-analyzer-mcp",
"env": {
"PYTHONUNBUFFERED": "1"
}
}
}
}
```
### Step 4: Restart Claude Desktop
1. **Completely quit** Claude Desktop (check Task Manager)
2. **Wait 5 seconds**
3. **Start** Claude Desktop
4. **Check** for 🔌 icon
### Step 5: Test in Claude
```
"List available MCP tools"
```
Should show:
- fetch_local_logs
- store_chunks_as_vectors
- query_SFlogs
## Common Issues
### Issue: "Module 'server' not found"
**Fix:** Make sure you're using `-m server` not `server.py`
```json
"args": ["-u", "-m", "server"] // Correct
```
### Issue: "No module named 'mcp'"
**Fix:**
```powershell
pip install mcp
```
### Issue: "No module named 'faiss'"
**Fix:**
```powershell
pip install faiss-cpu
```
### Issue: "No module named 'sentence_transformers'"
**Fix:**
```powershell
pip install sentence-transformers
```
### Issue: Server starts then immediately exits
**Fix:** Add unbuffered flag:
```json
"args": ["-u", "-m", "server"]
```
### Issue: "Cannot find Python"
**Fix:** Use full Python path:
```powershell
# Find Python
where python
# Use full path in config
"command": "C:\\full\\path\\to\\python.exe"
```
## Debugging Commands
### Check Python
```powershell
python --version
where python
```
### Check Dependencies
```powershell
cd "c:\Users\V0411759\Documents\AI TEST\log-analyzer-mcp"
pip list
```
### Test Import
```powershell
python -c "import mcp; import faiss; import sentence_transformers; print('OK')"
```
### View Claude Logs
```powershell
cd %APPDATA%\Claude\logs
Get-Content -Path (Get-ChildItem | Sort-Object LastWriteTime -Descending | Select-Object -First 1).FullName -Tail 50
```
## Working Configuration Template
Copy this EXACT configuration:
```json
{
"mcpServers": {
"log-analyzer": {
"command": "python",
"args": [
"-u",
"-m",
"server"
],
"cwd": "c:\\Users\\V0411759\\Documents\\AI TEST\\log-analyzer-mcp",
"env": {
"PYTHONUNBUFFERED": "1",
"PYTHONPATH": "c:\\Users\\V0411759\\Documents\\AI TEST\\log-analyzer-mcp",
"LOG_FOLDER": "c:\\Users\\V0411759\\Documents\\AI TEST\\log-analyzer-mcp\\logs"
}
}
}
}
```
**File location:** `C:\Users\V0411759\AppData\Roaming\Claude\claude_desktop_config.json`
## Still Not Working?
1. **Check Claude logs:** `%APPDATA%\Claude\logs\`
2. **Verify Python works:** `python -m server`
3. **Test imports:** `python -c "import mcp"`
4. **Check paths:** All paths must use `\\` on Windows
5. **Restart everything:** Quit Claude completely, wait, restart
## Quick Fix Checklist
- [ ] Dependencies installed: `pip install -r requirements.txt`
- [ ] Python works: `python --version`
- [ ] Server runs: `python -u -m server`
- [ ] Config uses absolute paths
- [ ] Config has `-u` flag
- [ ] Claude Desktop completely restarted
- [ ] Check Claude logs for errors
If still failing, share the Claude Desktop log file contents.
