How to integrate Studio By Ai21 Labs MCP with Google ADK

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Introduction

This guide walks you through connecting Studio By Ai21 Labs to Google ADK using the Composio tool router. By the end, you'll have a working Studio By Ai21 Labs agent that can generate a summary of this research paper, classify sentiment of this product review, extract key topics from meeting transcript through natural language commands.

This guide will help you understand how to give your Google ADK agent real control over a Studio By Ai21 Labs account through Composio's Studio By Ai21 Labs MCP server.

Before we dive in, let's take a quick look at the key ideas and tools involved.

TL;DR

Here's what you'll learn:
  • Get a Studio By Ai21 Labs account set up and connected to Composio
  • Install the Google ADK and Composio packages
  • Create a Composio Tool Router session for Studio By Ai21 Labs
  • Build an agent that connects to Studio By Ai21 Labs through MCP
  • Interact with Studio By Ai21 Labs using natural language

What is Google ADK?

Google ADK (Agents Development Kit) is Google's framework for building AI agents powered by Gemini models. It provides tools for creating agents that can use external services through the Model Context Protocol.

Key features include:

  • Gemini Integration: Native support for Google's Gemini models
  • MCP Toolset: Built-in support for Model Context Protocol tools
  • Streamable HTTP: Connect to external services through streamable HTTP
  • CLI and Web UI: Run agents via command line or web interface

What is the Studio By Ai21 Labs MCP server, and what's possible with it?

The Studio By Ai21 Labs MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Studio By Ai21 Labs account. It provides structured and secure access so your agent can perform Studio By Ai21 Labs operations on your behalf.

Supported Tools & Triggers

Tools
Check Can IframeTool to check if a URL can be embedded in an iframe.
Compare TextTool to compare two text strings and identify differences.
Create Aftersales Parts Classification BatchTool to create a batch job for Fnac Aftersales parts classification.
Create Assistant RouteTool to create a new route for an AI21 Studio assistant.
Create AssistantTool to create a new AI assistant in AI21 Studio.
Create Assistant PlanTool to create a new plan for an AI21 Studio assistant.
Create DemoTool to create a new demo in AI21 Studio.
Generate RequirementsTool to generate requirements from a query or task description.
Generate Thread NameTool to generate a thread name from a query or conversation context.
Create Kirsh Grant Compliance PreviewTool to preview grant compliance for Kirsh grants.
Kirsh Grant Metadata PreviewTool to retrieve grant metadata from the Kirsh preview endpoint.
Create MCP StorageTool to create MCP (Model Context Protocol) storage in AI21 Studio.
Create SecretTool to save a secret in AI21 Studio.
Check Kirsh Grant ComplianceTool to check compliance for Kirsh grant IDs.
Create Website ConnectorTool to create a website connector in AI21 Studio.
Delete AssistantTool to delete an assistant by its unique ID.
Delete Assistant RouteTool to delete a route from an AI21 Studio assistant.
Delete DemoTool to delete a demo by its unique ID.
Delete MCP StorageTool to delete an MCP (Model Context Protocol) storage configuration by its unique ID.
Delete SecretTool to delete a secret by its unique ID.
Delete Website ConnectorPermanently delete a website connector by its unique identifier.
Download Modified DocumentTool to download a modified document from AI21 Labs Studio.
Get AssistantTool to retrieve an assistant by its unique identifier.
Get Assistant RouteTool to retrieve details of a specific route for an AI21 Studio assistant.
Get Assistants By MCPTool to retrieve all assistants associated with a specific MCP (Model Context Protocol) storage configuration.
Get Batch Prediction StatusTool to check the status of a Fnac Aftersales parts classification batch prediction job.
Get DemoTool to retrieve a demo by its unique ID.
Grant Kirsh MetadataTool to retrieve Kirsh grant metadata by grant ID.
Get Library Batch StatusTool to get the ingestion status of a library batch.
Get MCP StorageTool to retrieve a specific MCP (Model Context Protocol) storage configuration by its unique ID.
Get Output ExplanationTool to get output explanation for an execution (cached or generated).
Get PlanTool to retrieve a specific plan from an AI21 Studio assistant.
Get Website Connector By IDTool to retrieve details of a specific website connector by its ID.
Get Website Connector StatusTool to retrieve the status of a website connector ingestion.
Get Website Connector URL StatusTool to retrieve the status of a specific URL in the website connector.
Ingest Website ConnectorTool to ingest website content via sitemap URL in AI21 Studio.
Ingest Website Connector URLTool to ingest a website URL into AI21 Studio's website connector.
List AssistantsTool to retrieve all assistants from AI21 Studio.
List Website ConnectorsTool to retrieve website connector information from AI21 Studio.
List DemosTool to retrieve all demos from AI21 Studio.
List Library FilesTool to list files in the workspace library with optional filtering.
List MCP StorageTool to retrieve all MCP (Model Context Protocol) storage configurations from AI21 Studio.
List ModelsTool to retrieve information about all available AI21 models.
List PlansTool to list all plans for a specific assistant.
List SecretsTool to retrieve all secrets from AI21 Studio secret storage.
List Workspace ModelsTool to retrieve all workspace models by organization from AI21 Studio.
List Available ModelsTool to retrieve all available models from AI21 Studio settings.
Modify AssistantTool to modify an existing AI21 Studio assistant.
Modify Assistant RouteTool to modify an existing route within an assistant.
Modify Assistant PlanTool to modify an existing assistant plan in AI21 Studio.
Retry Ingest WebsiteTool to retry ingestion of a website in AI21 Studio.
Run AssistantTool to run an AI21 Studio assistant with conversational input.
Sync Website ConnectorTool to sync a website connector in AI21 Studio.
Update DemoTool to update an existing demo in Studio by AI21 Labs.
Update MCP StorageTool to update an existing MCP (Model Context Protocol) storage configuration in AI21 Studio.
Update SecretTool to update an existing secret in AI21 Studio.
Validate PlanTool to validate Python code for an AI21 Studio assistant plan.

What is the Composio tool router, and how does it fit here?

What is Tool Router?

Composio's Tool Router helps agents find the right tools for a task at runtime. You can plug in multiple toolkits (like Gmail, HubSpot, and GitHub), and the agent will identify the relevant app and action to complete multi-step workflows. This can reduce token usage and improve the reliability of tool calls. Read more here: Getting started with Tool Router

The tool router generates a secure MCP URL that your agents can access to perform actions.

How the Tool Router works

The Tool Router follows a three-phase workflow:

  1. Discovery: Searches for tools matching your task and returns relevant toolkits with their details.
  2. Authentication: Checks for active connections. If missing, creates an auth config and returns a connection URL via Auth Link.
  3. Execution: Executes the action using the authenticated connection.

Step-by-step Guide

Prerequisites

Before starting, make sure you have:
  • A Google API key for Gemini models
  • A Composio account and API key
  • Python 3.9 or later installed
  • Basic familiarity with Python

Getting API Keys for Google and Composio

Google API Key
  • Go to Google AI Studio and create an API key.
  • Copy the key and keep it safe. You will put this in GOOGLE_API_KEY.
Composio API Key and User ID
  • Log in to the Composio dashboard.
  • Go to Settings → API Keys and copy your Composio API key. Use this for COMPOSIO_API_KEY.
  • Decide on a stable user identifier to scope sessions, often your email or a user ID. Use this for COMPOSIO_USER_ID.

Install dependencies

bash
pip install google-adk composio python-dotenv

Inside your virtual environment, install the required packages.

What's happening:

  • google-adk is Google's Agents Development Kit
  • composio connects your agent to Studio By Ai21 Labs via MCP
  • python-dotenv loads environment variables

Set up ADK project

bash
adk create my_agent

Set up a new Google ADK project.

What's happening:

  • This creates an agent folder with a root agent file and .env file

Set environment variables

bash
GOOGLE_API_KEY=your-google-api-key
COMPOSIO_API_KEY=your-composio-api-key
COMPOSIO_USER_ID=your-user-id-or-email

Save all your credentials in the .env file.

What's happening:

  • GOOGLE_API_KEY authenticates with Google's Gemini models
  • COMPOSIO_API_KEY authenticates with Composio
  • COMPOSIO_USER_ID identifies the user for session management

Import modules and validate environment

python
import os
import warnings

from composio import Composio
from dotenv import load_dotenv
from google.adk.agents.llm_agent import Agent
from google.adk.tools.mcp_tool.mcp_session_manager import StreamableHTTPConnectionParams
from google.adk.tools.mcp_tool.mcp_toolset import McpToolset

load_dotenv()

warnings.filterwarnings("ignore", message=".*BaseAuthenticatedTool.*")

GOOGLE_API_KEY = os.getenv("GOOGLE_API_KEY")
COMPOSIO_API_KEY = os.getenv("COMPOSIO_API_KEY")
COMPOSIO_USER_ID = os.getenv("COMPOSIO_USER_ID")

if not GOOGLE_API_KEY:
    raise ValueError("GOOGLE_API_KEY is not set in the environment.")
if not COMPOSIO_API_KEY:
    raise ValueError("COMPOSIO_API_KEY is not set in the environment.")
if not COMPOSIO_USER_ID:
    raise ValueError("COMPOSIO_USER_ID is not set in the environment.")
What's happening:
  • os reads environment variables
  • Composio is the main Composio SDK client
  • GoogleProvider declares that you are using Google ADK as the agent runtime
  • Agent is the Google ADK LLM agent class
  • McpToolset lets the ADK agent call MCP tools over HTTP

Create Composio client and Tool Router session

python
composio_client = Composio(api_key=COMPOSIO_API_KEY)

composio_session = composio_client.create(
    user_id=COMPOSIO_USER_ID,
    toolkits=["studio_by_ai21_labs"],
)

COMPOSIO_MCP_URL = composio_session.mcp.url,
print(f"Composio MCP URL: {COMPOSIO_MCP_URL}")
What's happening:
  • Authenticates to Composio with your API key
  • Declares Google ADK as the provider
  • Spins up a short-lived MCP endpoint for your user and selected toolkit
  • Stores the MCP HTTP URL for the ADK MCP integration

Set up the McpToolset and create the Agent

python
composio_toolset = McpToolset(
    connection_params=StreamableHTTPConnectionParams(
        url=COMPOSIO_MCP_URL,
        headers={"x-api-key": COMPOSIO_API_KEY}
    )
)

root_agent = Agent(
    model="gemini-2.5-flash",
    name="composio_agent",
    description="An agent that uses Composio tools to perform actions.",
    instruction=(
        "You are a helpful assistant connected to Composio. "
        "You have the following tools available: "
        "COMPOSIO_SEARCH_TOOLS, COMPOSIO_MULTI_EXECUTE_TOOL, "
        "COMPOSIO_MANAGE_CONNECTIONS, COMPOSIO_REMOTE_BASH_TOOL, COMPOSIO_REMOTE_WORKBENCH. "
        "Use these tools to help users with Studio By Ai21 Labs operations."
    ),
    tools=[composio_toolset],
)

print("\nAgent setup complete. You can now run this agent directly ;)")
What's happening:
  • Connects the ADK agent to the Composio MCP endpoint through McpToolset
  • Uses Gemini as the model powering the agent
  • Lists exact tool names in instruction to reduce misnamed tool calls

Run the agent

bash
# Run in CLI mode
adk run my_agent

# Or run in web UI mode
adk web

Execute the agent from the project root. The web command opens a web portal where you can chat with the agent.

What's happening:

  • adk run runs the agent in CLI mode
  • adk web . opens a web UI for interactive testing

Complete Code

Here's the complete code to get you started with Studio By Ai21 Labs and Google ADK:

python
import os
import warnings

from composio import Composio
from composio_google import GoogleProvider
from dotenv import load_dotenv
from google.adk.agents.llm_agent import Agent
from google.adk.tools.mcp_tool.mcp_session_manager import StreamableHTTPConnectionParams
from google.adk.tools.mcp_tool.mcp_toolset import McpToolset

load_dotenv()
warnings.filterwarnings("ignore", message=".*BaseAuthenticatedTool.*")

GOOGLE_API_KEY = os.getenv("GOOGLE_API_KEY")
COMPOSIO_API_KEY = os.getenv("COMPOSIO_API_KEY")
COMPOSIO_USER_ID = os.getenv("COMPOSIO_USER_ID")

if not GOOGLE_API_KEY:
    raise ValueError("GOOGLE_API_KEY is not set in the environment.")
if not COMPOSIO_API_KEY:
    raise ValueError("COMPOSIO_API_KEY is not set in the environment.")
if not COMPOSIO_USER_ID:
    raise ValueError("COMPOSIO_USER_ID is not set in the environment.")

composio_client = Composio(api_key=COMPOSIO_API_KEY, provider=GoogleProvider())

composio_session = composio_client.create(
    user_id=COMPOSIO_USER_ID,
    toolkits=["studio_by_ai21_labs"],
)

COMPOSIO_MCP_URL = composio_session.mcp.url


composio_toolset = McpToolset(
    connection_params=StreamableHTTPConnectionParams(
        url=COMPOSIO_MCP_URL,
        headers={"x-api-key": COMPOSIO_API_KEY}
    )
)

root_agent = Agent(
    model="gemini-2.5-flash",
    name="composio_agent",
    description="An agent that uses Composio tools to perform actions.",
    instruction=(
        "You are a helpful assistant connected to Composio. "
        "You have the following tools available: "
        "COMPOSIO_SEARCH_TOOLS, COMPOSIO_MULTI_EXECUTE_TOOL, "
        "COMPOSIO_MANAGE_CONNECTIONS, COMPOSIO_REMOTE_BASH_TOOL, COMPOSIO_REMOTE_WORKBENCH. "
        "Use these tools to help users with Studio By Ai21 Labs operations."
    ),  
    tools=[composio_toolset],
)

print("\nAgent setup complete. You can now run this agent directly ;)")

Conclusion

You've successfully integrated Studio By Ai21 Labs with the Google ADK through Composio's MCP Tool Router. Your agent can now interact with Studio By Ai21 Labs using natural language commands.

Key takeaways:

  • The Tool Router approach dynamically routes requests to the appropriate Studio By Ai21 Labs tools
  • Environment variables keep your credentials secure and separate from code
  • Clear agent instructions reduce tool calling errors
  • The ADK web UI provides an interactive interface for testing and development

You can extend this setup by adding more toolkits to the toolkits array in your session configuration.

How to build Studio By Ai21 Labs MCP Agent with another framework

OpenAI Agents SDK

OpenAI Agents SDK

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Claude Agent SDK

Claude Agent SDK

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LangChain

LangChain

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Vercel AI SDK

Vercel AI SDK

Use Studio By Ai21 Labs MCP with Vercel AI SDK

Mastra AI

Mastra AI

Use Studio By Ai21 Labs MCP with Mastra AI

LlamaIndex

LlamaIndex

Use Studio By Ai21 Labs MCP with LlamaIndex

CrewAI

CrewAI

Use Studio By Ai21 Labs MCP with CrewAI

Claude Code

Claude Code

Use Studio By Ai21 Labs MCP with Claude Code

Codex

Codex

Use Studio By Ai21 Labs MCP with Codex

FAQ

What are the differences in Tool Router MCP and Studio By Ai21 Labs MCP?

With a standalone Studio By Ai21 Labs MCP server, the agents and LLMs can only access a fixed set of Studio By Ai21 Labs tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Studio By Ai21 Labs and many other apps based on the task at hand, all through a single MCP endpoint.

Can I use Tool Router MCP with Google ADK?

Yes, you can. Google ADK fully supports MCP integration. You get structured tool calling, message history handling, and model orchestration while Tool Router takes care of discovering and serving the right Studio By Ai21 Labs tools.

Can I manage the permissions and scopes for Studio By Ai21 Labs while using Tool Router?

Yes, absolutely. You can configure which Studio By Ai21 Labs scopes and actions are allowed when connecting your account to Composio. You can also bring your own OAuth credentials or API configuration so you keep full control over what the agent can do.

How safe is my data with Composio Tool Router?

All sensitive data such as tokens, keys, and configuration is fully encrypted at rest and in transit. Composio is SOC 2 Type 2 compliant and follows strict security practices so your Studio By Ai21 Labs data and credentials are handled as safely as possible.

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