MCP

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The Model Context Protocol (MCP) enables large language models to use external tools and data. Compared with function calling, MCP offers greater flexibility and ease of use. This topic describes how to connect to MCP using the Responses API.

Usage

Add MCP server information in the tools parameter when using the Responses API.

For more information about how to find and enable an MCP server, see Enable a cloud-deployed MCP server.
Supports MCP servers using the SSE protocol.
Maximum 10 MCP servers.
# Import dependencies and create a client...
mcp_tool = {
    "type": "mcp",
    "server_protocol": "sse",
    "server_label": "my-mcp-service",
    "server_description": "A description of the MCP server's features to help the model understand its use cases.",
    "server_url": "https://your-mcp-server-endpoint/sse",
    "headers": {
        "Authorization": "Bearer YOUR_TOKEN"
    }
}

response = client.responses.create(
    model="qwen3.7-plus",
    input="Your question...",
    tools=[mcp_tool]
)

print(response.output_text)

Supported models

  • Qwen-Max: Qwen3.7-Max series

  • Qwen-Plus: Qwen3.7-Plus series, Qwen3.6-Plus series, Qwen3.5-Plus series

  • Qwen-Flash: Qwen3.6-Flash series, Qwen3.5-Flash series

  • Qwen3.6 open-source series (except qwen3.6-27b)

  • Qwen3.5 open-source series

Available through the Responses API only.

Getting started

This example shows how to call an MCP tool using the Responses API to connect to the WebParser MCP server. First, enable the WebParser MCP service.

Get an API key and configure it as an environment variable.

Replace server_url and headers with your MCP service information.
import os
from openai import OpenAI

client = OpenAI(
    # If no environment variable, use: api_key="sk-xxx" (not recommended).
    api_key=os.getenv("DASHSCOPE_API_KEY"),
    base_url="https://{WorkspaceId}.cn-beijing.maas.aliyuncs.com/compatible-mode/v1"
)

# MCP tool configuration
mcp_tool = {
    "type": "mcp",
    "server_protocol": "sse",
    "server_label": "WebParser",
    "server_description": "WebParser MCP service for parsing web page content.",
    "server_url": "https://{WorkspaceId}.cn-beijing.maas.aliyuncs.com/api/v1/mcps/WebParser/sse",
    "headers": {
        "Authorization": "Bearer " + os.getenv("DASHSCOPE_API_KEY")
    }
}

response = client.responses.create(
    model="qwen3.7-plus",
    input="Which models are supported in https://help.aliyun.com/zh/model-studio/mcp ?",
    tools=[mcp_tool]
)

print("[Model Response]")
print(response.output_text)
print(f"\n[Token Usage] Input: {response.usage.input_tokens}, Output: {response.usage.output_tokens}, Total: {response.usage.total_tokens}")
import OpenAI from "openai";
import process from 'process';

const openai = new OpenAI({
    // If no environment variable, use: apiKey: "sk-xxx" (not recommended).
    apiKey: process.env.DASHSCOPE_API_KEY,
    baseURL: "https://{WorkspaceId}.cn-beijing.maas.aliyuncs.com/compatible-mode/v1"
});

async function main() {
    // MCP tool configuration
    const mcpTool = {
        type: "mcp",
        server_protocol: "sse",
        server_label: "WebParser",
        server_description: "WebParser MCP service for parsing web page content.",
        server_url: "https://{WorkspaceId}.cn-beijing.maas.aliyuncs.com/api/v1/mcps/WebParser/sse",
        headers: {
            "Authorization": "Bearer " + process.env.DASHSCOPE_API_KEY
        }
    };

    const response = await openai.responses.create({
        model: "qwen3.7-plus",
        input: "Which models are supported in https://help.aliyun.com/zh/model-studio/mcp ?",
        tools: [mcpTool]
    });

    console.log("[Model Response]");
    console.log(response.output_text);
    console.log(`\n[Token Usage] Input: ${response.usage.input_tokens}, Output: ${response.usage.output_tokens}, Total: ${response.usage.total_tokens}`);
}

main();
curl -X POST https://{WorkspaceId}.cn-beijing.maas.aliyuncs.com/compatible-mode/v1/responses \
-H "Authorization: Bearer $DASHSCOPE_API_KEY" \
-H "Content-Type: application/json" \
-d '{
    "model": "qwen3.7-plus",
    "input": "Which models are supported in https://help.aliyun.com/zh/model-studio/mcp ?",
    "tools": [
        {
            "type": "mcp",
            "server_protocol": "sse",
            "server_label": "WebParser",
            "server_description": "WebParser MCP service for parsing web page content.",
            "server_url": "https://{WorkspaceId}.cn-beijing.maas.aliyuncs.com/api/v1/mcps/WebParser/sse",
            "headers": {
                "Authorization": "Bearer your-api-key"
            }
        }
    ]
}'

After you run the code, the following response is returned:

[Model Response]
Based on the documentation for the Model Context Protocol (MCP) on the Alibaba Cloud Model Studio (Bailian) help center, the supported models are:

*   Qwen Plus:
    *   Qwen3.7-Plus series
    *   Qwen3.6-Plus series
    *   Qwen3.5-Plus series
*   Qwen Flash:
    *   Qwen3.6-Flash series
    *   Qwen3.5-Flash series
*   Qwen3.6 Open Source Series (excluding qwen3.6-27b)
*   Qwen3.5 Open Source Series

Note: The documentation specifies that MCP is only supported via the Responses API (client.responses.create) and not the standard Chat Completions API.

[Token Usage] Input: 20583, Output: 1638, Total: 22221

Streaming output

MCP tool calls may involve multiple interactions with external services. Enable streaming for real-time intermediate results.

import os
from openai import OpenAI

client = OpenAI(
    # If no environment variable, use: api_key="sk-xxx" (not recommended).
    api_key=os.getenv("DASHSCOPE_API_KEY"),
    base_url="https://{WorkspaceId}.cn-beijing.maas.aliyuncs.com/compatible-mode/v1"
)

mcp_tool = {
    "type": "mcp",
    "server_protocol": "sse",
    "server_label": "WebParser",
    "server_description": "WebParser MCP service for parsing web page content.",
    "server_url": "https://{WorkspaceId}.cn-beijing.maas.aliyuncs.com/api/v1/mcps/WebParser/sse",
    "headers": {
        "Authorization": "Bearer " + os.getenv("DASHSCOPE_API_KEY")
    }
}

stream = client.responses.create(
    model="qwen3.7-plus",
    input="Which models are supported in https://help.aliyun.com/zh/model-studio/mcp ?",
    tools=[mcp_tool],
    stream=True
)

for event in stream:
    # The model response starts
    if event.type == "response.content_part.added":
        print("[Model Response]")
    # Streaming text output
    elif event.type == "response.output_text.delta":
        print(event.delta, end="", flush=True)
    # The response is complete, output the usage
    elif event.type == "response.completed":
        usage = event.response.usage
        print(f"\n\n[Token Usage] Input: {usage.input_tokens}, Output: {usage.output_tokens}, Total: {usage.total_tokens}")
import OpenAI from "openai";
import process from 'process';

const openai = new OpenAI({
    // If no environment variable, use: apiKey: "sk-xxx" (not recommended).
    apiKey: process.env.DASHSCOPE_API_KEY,
    baseURL: "https://{WorkspaceId}.cn-beijing.maas.aliyuncs.com/compatible-mode/v1"
});

async function main() {
    const mcpTool = {
        type: "mcp",
        server_protocol: "sse",
        server_label: "WebParser",
        server_description: "WebParser MCP service for parsing web page content.",
        server_url: "https://{WorkspaceId}.cn-beijing.maas.aliyuncs.com/api/v1/mcps/WebParser/sse",
        headers: {
            "Authorization": "Bearer " + process.env.DASHSCOPE_API_KEY
        }
    };

    const stream = await openai.responses.create({
        model: "qwen3.7-plus",
        input: "Which models are supported in https://help.aliyun.com/zh/model-studio/mcp ?",
        tools: [mcpTool],
        stream: true
    });

    for await (const event of stream) {
        // The model response starts
        if (event.type === "response.content_part.added") {
            console.log("[Model Response]");
        }
        // Streaming text output
        else if (event.type === "response.output_text.delta") {
            process.stdout.write(event.delta);
        }
        // The response is complete, output the usage
        else if (event.type === "response.completed") {
            const usage = event.response.usage;
            console.log(`\n\n[Token Usage] Input: ${usage.input_tokens}, Output: ${usage.output_tokens}, Total: ${usage.total_tokens}`);
        }
    }
}

main();
curl -X POST https://{WorkspaceId}.cn-beijing.maas.aliyuncs.com/compatible-mode/v1/responses \
-H "Authorization: Bearer $DASHSCOPE_API_KEY" \
-H "Content-Type: application/json" \
-d '{
    "model": "qwen3.7-plus",
    "input": "Which models are supported in https://help.aliyun.com/zh/model-studio/mcp ?",
    "tools": [
        {
            "type": "mcp",
            "server_protocol": "sse",
            "server_label": "WebParser",
            "server_description": "WebParser MCP service for parsing web page content.",
            "server_url": "https://{WorkspaceId}.cn-beijing.maas.aliyuncs.com/api/v1/mcps/WebParser/sse",
            "headers": {
                "Authorization": "Bearer your-api-key"
            }
        }
    ],
    "stream": true
}'

After you run the code, the following response is returned:

[Model Response]
Based on the documentation page for MCP on Alibaba Cloud Model Studio, the following models are supported:

*   Qwen Plus Series: Qwen3.7-Plus series, Qwen3.6-Plus series and Qwen3.5-Plus series
*   Qwen Flash Series: Qwen3.6-Flash series and Qwen3.5-Flash series
*   Qwen3.6 Open Source Series (excluding qwen3.6-27b)
*   Qwen3.5 Open Source Series

Note: These models support MCP functionality only via the Responses API.

[Token Usage] Input: 20472, Output: 945, Total: 21417

Parameters

The mcp tool supports the following parameters:

Parameter

Required

Description

type

Yes

Set to "mcp".

server_protocol

Yes

The communication protocol with the MCP server. Currently, only "sse" is supported.

server_label

Yes

The label name of the MCP server, used to identify the service.

server_description

No

A description of the MCP server's features. This helps the model understand the service's capabilities and scenarios. Filling in this parameter is recommended to improve the accuracy of model calls.

server_url

Yes

The endpoint URL of the MCP server.

headers

No

The request headers to include when connecting to the MCP server, such as authentication information like Authorization.

Example:

{
    "type": "mcp",
    "server_protocol": "sse",
    "server_label": "WebParser",
    "server_description": "WebParser MCP service for parsing web page content.",
    "server_url": "https://{WorkspaceId}.cn-beijing.maas.aliyuncs.com/api/v1/mcps/WebParser/sse",
    "headers": {
        "Authorization": "Bearer " + os.getenv("DASHSCOPE_API_KEY")
    }
}

Billing

Billing includes:

  • Model inference fees: Billed based on the model's token usage.

  • MCP server fees: Subject to the billing rules of each MCP server.