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.

Configure the credential through the repository environment template. Never write an API key into a skill, source file, command example, or committed configuration file.

cd /path/to/MolClaw
cp .env.template .env
# Set SCP_HUB_API_KEY in .env, then load it into the current shell:
set -a
source .env
set +a

The server is defined as below:

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

DrugSDA_Tool_SERVER_URL = "https://scp.intern-ai.org.cn/api/v1/mcp/2/DrugSDA-Tool"

class DrugSDAClient:
    def __init__(self, server_url: str):
        self.server_url = server_url
        self.session = None
        self.api_key = os.environ.get("SCP_HUB_API_KEY")
        if not self.api_key:
            raise RuntimeError(
                "SCP_HUB_API_KEY is not set. Copy .env.template to .env, "
                "set the key, and load .env into the current shell."
            )

    async def connect(self):
        print(f"server url: {self.server_url}")
        try:
            self.transport = streamablehttp_client(
                url=self.server_url,
                headers={"SCP-HUB-API-KEY": self.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(DrugSDA_Tool_SERVER_URL)
if not await client.connect():
    print("connection failed")
    return

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

Note: The deployed MolClaw tool endpoint is https://scp.intern-ai.org.cn/api/v1/mcp/2/DrugSDA-Tool.