Copy page

Frameworks & SDKs

Claude SDK

Install

Code
pip install anthropic

---

How it works

The Anthropic SDK's MCP connector is different from other frameworks. Rather than giving you a direct MCP client, it lets the Anthropic API act as the MCP client on your behalf. You attach the MCP server to your API call, Claude decides which tools to call, and the API handles the MCP protocol round-trip.

You cannot call list_tools() or call_tool() imperatively. The model drives all tool use.

That suits MewCP well. Claude sees four tools, search, get_schema, list_accounts, and call_tool, and uses them to reach every app you have connected. See How MewCP works.

---

Example

Code
import anthropic

MEWCP_API_KEY = "API_KEY"

client = anthropic.Anthropic()

response = client.beta.messages.create(
    model="claude-opus-5",
    max_tokens=2048,
    messages=[
        {
            "role": "user",
            "content": "What is on my calendar tomorrow?",
        }
    ],
    mcp_servers=[
        {
            "type": "url",
            "url": "https://gateway.mewcp.com/personal/mcp",
            "name": "mewcp",
            "authorization_token": MEWCP_API_KEY,
        }
    ],
    betas=["mcp-client-2025-11-20"],
)

# The response may contain text blocks and mcp_tool_result blocks
for block in response.content:
    if hasattr(block, "text"):
        print(block.text)

One server entry covers every app you have connected. Connecting another app in the dashboard needs no change here.

---

Choosing an account

When you have connected more than one account for the same app, say which one you mean in the prompt. Claude will call list_accounts and pick it by alias:

Code
messages=[
    {
        "role": "user",
        "content": "Check my work Gmail for anything from the design team.",
    }
]

---

Important notes

• authorization_token sends the value as Authorization: Bearer <token>. Do not put Bearer in the value.
• The beta header is "mcp-client-2025-11-20". The older mcp-client-2025-04-04 is deprecated.
• Only MCP tools are supported via this connector. Prompts and resources are not exposed.
• The server URL must be https://.

---

Where to find your values

Value	Where to get it
API_KEY	Dashboard -> API Keys
Connected apps	Dashboard -> Servers