# MCP Server Implementation Gap Analysis
## 🔍 Missing Components vs Official Reference
Berdasarkan referensi resmi dari https://modelcontextprotocol.io/docs/develop/build-server, berikut adalah komponen yang kurang atau perlu diperbaiki:
## ❌ **Critical Issues Found:**
### 1. **Wrong SDK Implementation**
- **Current**: Custom implementation dengan FastAPI
- **Should be**: Using official MCP Python SDK with `FastMCP` class
- **Reference**: `from mcp.server.fastmcp import FastMCP`
### 2. **Missing STDIO Transport**
- **Current**: Only HTTP transport implemented
- **Should be**: Primary transport should be STDIO for MCP clients
- **Reference**: `mcp.run(transport='stdio')`
### 3. **Incorrect Tool Registration**
- **Current**: Manual tool registry with complex schemas
- **Should be**: Using `@mcp.tool()` decorator with automatic schema generation
- **Reference**: Automatic tool definition from Python type hints and docstrings
### 4. **Wrong Entry Point Pattern**
- **Current**: HTTP server with complex routing
- **Should be**: Simple main() function with `mcp.run()`
- **Reference**: Direct MCP server execution, not web server
### 5. **Missing Standard MCP Structure**
- **Current**: Custom JSON-RPC implementation
- **Should be**: Using MCP SDK's built-in protocol handling
- **Reference**: SDK handles all protocol details automatically
## 🛠️ **Required Changes:**
### 1. **Install Correct Dependencies**
```bash
# Current (incorrect)
mcp>=1.0.0
fastapi>=0.104.0
# Should be (correct)
pip install "mcp[cli]" httpx
```
### 2. **Restructure Main Server File**
Instead of current complex server, should be:
```python
from typing import Any
import httpx
from mcp.server.fastmcp import FastMCP
# Initialize FastMCP server
mcp = FastMCP("ocr-pdf")
@mcp.tool()
async def process_pdf_smart(pdf_path: str, language: str = "eng") -> str:
\"\"\"Intelligently process PDF with automatic OCR detection.
Args:
pdf_path: Path to the PDF file
language: OCR language code (default: eng)
\"\"\"
# Implementation here
pass
def main():
mcp.run(transport='stdio')
if __name__ == "__main__":
main()
```
### 3. **Simplify Tool Definitions**
- Remove complex MCPTool classes
- Use simple Python functions with `@mcp.tool()` decorator
- Let SDK generate schemas automatically from type hints
### 4. **Fix Transport Method**
- Remove HTTP/FastAPI server for STDIO clients
- Use `transport='stdio'` as primary method
- HTTP transport only for specific web integrations
### 5. **Update Client Configurations**
Current configs are pointing to wrong entry:
```json
// Current (wrong for STDIO)
"command": "python",
"args": ["run.py"] // This starts HTTP server
// Should be (correct for STDIO)
"command": "python",
"args": ["ocr_server.py"] // This starts STDIO server
```
## 📋 **Implementation Priority:**
1. 🔴 **High Priority:**
- Install correct MCP SDK: `pip install "mcp[cli]"`
- Create new STDIO server using FastMCP
- Rewrite tools with `@mcp.tool()` decorators
2. 🟡 **Medium Priority:**
- Update client configurations for STDIO transport
- Remove complex HTTP routing (keep simple HTTP for web clients)
- Fix logging to use stderr (not stdout)
3. 🟢 **Low Priority:**
- Keep current HTTP implementation as alternative
- Add dual-transport support (STDIO + HTTP)
## 🎯 **Expected Outcome:**
After fixes:
- ✅ Compatible with all MCP clients (Claude Desktop, etc.)
- ✅ Simpler codebase (80% less code)
- ✅ Automatic tool schema generation
- ✅ Better error handling via SDK
- ✅ Standard MCP protocol compliance
## 📖 **Next Steps:**
1. Install correct dependencies
2. Create new `ocr_server.py` with FastMCP
3. Migrate tools to decorator pattern
4. Update client configurations
5. Test with Claude Desktop
This analysis shows our current implementation is **significantly different** from the official MCP standard and needs major restructuring to be truly compliant.
