Molclaw Scp Server

SCP (Science Context Protocol) is an open-source standard protocol designed to accelerate scientific discovery by building a global collaboration network for autonomous scientific agents, connecting heterogeneous scientific resources (software tools, AI models, datasets, workflow engines, lab instruments, etc.).

1. Server Definition

If MCP environment. is not installed, please run pip install mcp.

The server is defined as below:

import os
import json
from mcp.client.streamable_http import streamablehttp_client
from mcp import ClientSession

class DrugSDAClient:    
    def __init__(self, server_url: str):
        self.server_url = server_url
        self.session = None
        
    async def connect(self):
        print(f"server url: {self.server_url}")
        try:
            api_key = os.getenv("SCP_HUB_API_KEY")
            if not api_key:
                raise ValueError("SCP_HUB_API_KEY is not set. Please configure it in .env.")

            self.transport = streamablehttp_client(
                url=self.server_url,
                headers={"SCP-HUB-API-KEY": api_key}
            )
            self.read, self.write, self.get_session_id = await self.transport.__aenter__()
            
            self.session_ctx = ClientSession(self.read, self.write)
            self.session = await self.session_ctx.__aenter__()

            await self.session.initialize()
            session_id = self.get_session_id()
            
            print(f"✓ connect success")
            return True
            
        except Exception as e:
            print(f"✗ connect failure: {e}")
            import traceback
            traceback.print_exc()
            return False
    
    async def disconnect(self):
        try:
            if self.session:
                await self.session_ctx.__aexit__(None, None, None)
            if hasattr(self, 'transport'):
                await self.transport.__aexit__(None, None, None)
            print("✓ already disconnect")
        except Exception as e:
            print(f"✗ disconnect error: {e}")
    
    def parse_result(self, result):
        try:
            if hasattr(result, 'content') and result.content:
                content = result.content[0]
                if hasattr(content, 'text'):
                    return json.loads(content.text)
            return str(result)
        except Exception as e:
            return {"error": f"parse error: {e}", "raw": str(result)}

2. Server Connection

The initialization and shutdown of the MCP server are shown below:

## When start, connect the MCP server
client = DrugSDAClient()
if not await client.connect(server_url):
    print("connection failed")
    return

## When finish, disconnect the MCP server
await client.disconnect() 

Note: For most tools, the default server endpoint (server_url) is https://scp.intern-ai.org.cn/api/v1/mcp/2/DrugSDA-Tool.