How to integrate Hookdeck MCP with Google ADK

This guide walks you through connecting Hookdeck to Google ADK using the Composio tool router. By the end, you'll have a working Hookdeck agent that can retry all failed webhook events from today, create a new source for github webhooks, bookmark this event for quick review later through natural language commands. This guide will help you understand how to give your Google ADK agent real control over a Hookdeck account through Composio's Hookdeck MCP server. Before we dive in, let's take a quick look at the key ideas and tools involved.

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Hookdeck is a platform for managing, monitoring, and securing webhooks and API events. It helps developers ensure reliable delivery and visibility for critical integrations.

105 Tools

Introduction

This guide walks you through connecting Hookdeck to Google ADK using the Composio tool router. By the end, you'll have a working Hookdeck agent that can retry all failed webhook events from today, create a new source for github webhooks, bookmark this event for quick review later through natural language commands.

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

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

Also integrate Hookdeck with

OpenAI Agents SDKClaude Agent SDKClaude CodeClaude CoworkCodexOpenClawHermesCLILangChainVercel AI SDKMastra AILlamaIndexCrewAI

TL;DR

Here's what you'll learn:
  • Get a Hookdeck account set up and connected to Composio
  • Install the Google ADK and Composio packages
  • Create a Composio Tool Router session for Hookdeck
  • Build an agent that connects to Hookdeck through MCP
  • Interact with Hookdeck 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 Hookdeck MCP server, and what's possible with it?

The Hookdeck MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Hookdeck account. It provides structured and secure access to your webhook management platform, so your agent can perform actions like routing webhooks, managing events, configuring sources and destinations, and automating retries or cancellations on your behalf.

  • Automated event management: Let your agent bulk cancel or retry multiple webhook events, keeping your pipeline clean and efficient without manual intervention.
  • Source and destination setup: Have the agent create, configure, and manage Hookdeck sources and destinations for seamless webhook routing between services.
  • Connection orchestration: Direct your agent to establish new connections between sources and destinations, ensuring events flow exactly where you want them to go.
  • Payload transformation: Empower the agent to create custom payload transformations using JavaScript, modifying webhook data before it reaches your endpoints.
  • Bookmarking and cleanup: Ask your agent to bookmark important events for quick access or delete outdated bookmarks to keep your workspace organized.

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

What is Composio SDK?

Composio's Composio SDK 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 Composio SDK

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

How the Composio SDK works

The Composio SDK 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

Step by step09 STEPS
1

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
2

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.
3

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 Hookdeck via MCP
  • python-dotenv loads environment variables
4

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
5

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
6

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
7

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=["hookdeck"],
)

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
8

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 Hookdeck 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
9

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 Hookdeck 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=["hookdeck"],
)

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 Hookdeck operations."
    ),  
    tools=[composio_toolset],
)

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

Conclusion

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

Key takeaways:

  • The Tool Router approach dynamically routes requests to the appropriate Hookdeck 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.

TOOLS

Supported Tools

Every Hookdeck action and event your agent gets out of the box.

Add Custom Domain

Tool to add a custom domain to the Hookdeck project.

Bulk Cancel Hookdeck Events

Tool to create a bulk cancellation job for events.

Bulk Retry Hookdeck Events

Initiate a bulk retry for multiple events matching the specified filters.

Cancel Hookdeck Event

Cancel all future delivery attempts for a Hookdeck event.

Cancel Event Bulk Retry

Tool to cancel an ongoing events bulk retry operation.

Cancel Request Bulk Retry

Tool to cancel an in-progress requests bulk retry operation.

Cancel Hookdeck Scheduled Retries

Tool to cancel all future scheduled retries for an event.

Count Hookdeck Connections

Tool to count Hookdeck connections with optional filters.

Count Hookdeck Destinations

Tool to count Hookdeck destinations with optional filters.

Count Hookdeck Sources

Tool to count Hookdeck sources with optional filters.

Create Hookdeck Bookmark

Tool to create a bookmark for a specific event request in Hookdeck.

Create Hookdeck Connection

Tool to create a connection between a source and a destination.

Create Hookdeck Destination

Tool to create a new Hookdeck destination.

Create Ignored Event Bulk Retry

Tool to create an ignored events bulk retry operation.

Create Hookdeck Integration

Tool to create a new Hookdeck integration.

Create Hookdeck Issue Trigger

Tool to create an issue trigger in Hookdeck.

Create Hookdeck Source

Tool to create a new Hookdeck source.

Create Hookdeck Transformation

Tool to create a new Hookdeck transformation.

Delete Hookdeck Bookmark

Tool to delete a specific bookmark by its ID.

Delete Hookdeck Connection

Tool to delete a specific connection by its ID.

Delete Hookdeck Destination

Permanently deletes a Hookdeck destination by its ID.

Delete Hookdeck Integration

Tool to delete a specific integration by its ID.

Delete Hookdeck Issue Trigger

Tool to delete a specific issue trigger by its ID.

Delete Hookdeck Source

Tool to delete a specific source by its ID.

Delete Hookdeck Transformation

Permanently delete a Hookdeck transformation by its ID.

Disable Hookdeck Connection

Tool to disable a connection by its ID.

Disable Hookdeck Destination

Tool to disable a Hookdeck destination.

Disable Hookdeck Issue Trigger

Tool to disable a Hookdeck issue trigger.

Disable Hookdeck Source

Tool to disable a Hookdeck source.

Enable Hookdeck Connection

Tool to enable a disabled Hookdeck connection.

Enable Hookdeck Destination

Enable a previously disabled Hookdeck destination by its ID.

Enable Hookdeck Issue Trigger

Tool to enable a Hookdeck issue trigger.

Enable Hookdeck Source

Tool to enable a disabled Hookdeck source.

Generate Event Bulk Cancel Plan

Tool to generate a preview plan for bulk event cancellation.

Generate Event Bulk Retry Plan

Tool to generate an events bulk retry plan.

Generate Ignored Event Bulk Retry Plan

Generate an ignored events bulk retry plan to estimate the scope before execution.

Generate Request Bulk Retry Plan

Tool to generate a requests bulk retry plan.

Get Hookdeck Attempt

Tool to retrieve a specific Hookdeck delivery attempt by ID.

Get attempts

Lists delivery attempts for your Hookdeck account.

Get attempts metrics

Tool to query aggregated attempt metrics with time-based grouping and filtering.

Get Hookdeck Bookmark

Tool to retrieve a single bookmark by its ID.

Get Bookmark Raw Body

Tool to retrieve the raw body data of a bookmarked request.

Get Hookdeck Connection

Retrieves details of a specific Hookdeck connection by its ID.

Hookdeck: Get Connections

Tool to list Hookdeck connections.

Get Hookdeck Destination

Retrieve details of a specific Hookdeck destination by ID.

Hookdeck: Get Destinations

Tool to list Hookdeck destinations.

Get Event

Tool to retrieve a specific Hookdeck event by ID.

Get Event Bulk Cancel Status

Tool to retrieve the status of a bulk event cancellation operation.

Get Event Bulk Cancels

Tool to list event bulk cancel operations for your Hookdeck account.

Get Event Bulk Retries

Tool to retrieve bulk retry operations for Hookdeck events.

Get Event Bulk Retry Status

Tool to retrieve the status of a bulk event retry operation.

Get Event Raw Body

Tool to retrieve the raw body data of an event.

Get events

Tool to list events for your Hookdeck account.

Get events by issue metrics

Tool to query event metrics grouped by individual issue IDs.

Get Events Metrics

Tool to query aggregated event metrics with time-based grouping and filtering.

Get events pending timeseries metrics

Tool to query aggregated events pending timeseries metrics with time-based grouping and filtering.

Get Ignored Event Bulk Retries

Tool to retrieve ignored events bulk retry operations for Hookdeck.

Get Ignored Event Bulk Retry Status

Tool to retrieve the status of an ignored events bulk retry operation.

Get Hookdeck Integration

Tool to retrieve details of a specific Hookdeck integration.

Get Hookdeck Integrations

Tool to retrieve a list of Hookdeck integrations.

Get Hookdeck Issue Count

Tool to get the count of Hookdeck issues with optional filters.

Get Hookdeck Issue Trigger

Tool to retrieve a single Hookdeck issue trigger by its ID.

Get issue triggers

Tool to list issue triggers for your Hookdeck account.

Get Queue Depth Metrics

Tool to query queue depth metrics for destinations (pending events count and age).

Get Hookdeck Request

Retrieve detailed information about a specific Hookdeck request by ID.

Get Request Bulk Retries

Tool to retrieve bulk retry operations for Hookdeck requests.

Get Request Bulk Retry Status

Tool to retrieve the status of a requests bulk retry operation.

Get Request Events

Tool to retrieve events associated with a specific Hookdeck request.

Get Request Ignored Events

Retrieve the list of ignored events for a specific Hookdeck request.

Get Request Raw Body

Tool to retrieve the raw body data of a request.

Hookdeck: Get Requests

Tool to list Hookdeck requests.

Get requests metrics

Tool to query aggregated request metrics with time-based grouping and filtering.

Get Hookdeck Source

Tool to retrieve details of a specific Hookdeck source.

Get sources

Tool to retrieve all sources associated with your Hookdeck account.

Get Hookdeck Transformation

Retrieves the complete details of a specific Hookdeck transformation by its ID.

Get Transformation Execution

Retrieve a specific transformation execution by transformation ID and execution ID.

Get transformation executions

Tool to retrieve executions for a specific Hookdeck transformation.

Get transformations

Tool to list Hookdeck transformations.

Get Transformations Count

Tool to get the count of Hookdeck transformations with optional filters.

Get transformations metrics

Tool to query aggregated transformation execution metrics with time-based grouping and filtering.

List Hookdeck Bookmarks

Tool to list bookmarks.

List Custom Domains

Tool to list all custom domains and their verification statuses for the Hookdeck project.

Hookdeck: List Issues

Tool to list all issues detected in your Hookdeck account.

Hookdeck Pause Connection

Tool to pause a Hookdeck connection.

Publish Event to Hookdeck

Tool to publish a webhook event to Hookdeck using the Publish API.

Replay Hookdeck Event

Replay (retry) a specific Hookdeck event delivery.

Resolve Hookdeck Issue

Tool to resolve a Hookdeck issue.

Retrieve Hookdeck Issue

Retrieves detailed information about a specific Hookdeck issue by its ID.

Send Hookdeck Source Request

Tool to send HTTP requests to a Hookdeck Source URL.

Test Hookdeck Transformation

Tool to test a Hookdeck transformation code before deploying it.

Toggle Webhook Notifications

Tool to toggle webhook notifications for the project.

Trigger Hookdeck Bookmark

Trigger a Hookdeck bookmark to replay its stored webhook request.

Unpause Hookdeck Connection

Tool to unpause a paused Hookdeck connection.

Update Hookdeck Bookmark

Tool to update an existing bookmark in Hookdeck.

Hookdeck Update Connection

Upsert (create or update) a Hookdeck connection between a source and destination.

Update Connection by ID

Tool to update an existing Hookdeck connection by its ID.

Update Hookdeck Destination

Tool to update an existing Hookdeck destination.

Update Hookdeck Integration

Tool to update an existing Hookdeck integration.

Update Hookdeck Issue Trigger

Tool to update an issue trigger in Hookdeck.

Update Hookdeck Source

Update an existing Hookdeck source's name, type, or description.

Update Hookdeck Transformation

Tool to update an existing Hookdeck transformation.

Upsert Hookdeck Destination

Tool to create or update a Hookdeck destination.

Upsert Hookdeck Issue Trigger

Tool to create or update an issue trigger in Hookdeck using upsert semantics.

Upsert Hookdeck Source

Tool to create or update a Hookdeck source by name.

Upsert Hookdeck Transformation

Tool to create or update a Hookdeck transformation by name.

FRAMEWORKS

How to build Hookdeck MCP Agent with another framework

OpenAI Agents SDK logo

OpenAI Agents SDK

Use Hookdeck MCP with OpenAI Agents SDK

Claude Agent SDK logo

Claude Agent SDK

Use Hookdeck MCP with Claude Agent SDK

Claude Code logo

Claude Code

Use Hookdeck MCP with Claude Code

Claude Cowork logo

Claude Cowork

Use Hookdeck MCP with Claude Cowork

Codex logo

Codex

Use Hookdeck MCP with Codex

OpenClaw logo

OpenClaw

Use Hookdeck MCP with OpenClaw

Hermes logo

Hermes

Use Hookdeck MCP with Hermes

CLI logo

CLI

Use Hookdeck MCP with CLI

LangChain logo

LangChain

Use Hookdeck MCP with LangChain

Vercel AI SDK logo

Vercel AI SDK

Use Hookdeck MCP with Vercel AI SDK

Mastra AI logo

Mastra AI

Use Hookdeck MCP with Mastra AI

LlamaIndex logo

LlamaIndex

Use Hookdeck MCP with LlamaIndex

CrewAI logo

CrewAI

Use Hookdeck MCP with CrewAI

FAQ

Frequently asked questions

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

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 Hookdeck tools.

Yes, absolutely. You can configure which Hookdeck 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.

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 Hookdeck data and credentials are handled as safely as possible.

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Karan skipped his own birthday party to fix our critical issue. It was 10pm and he diverted his Waymo to help us instead. This really sets the bar — it shows the commitment you need when users rely on your software.

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Co-founder, Slashy

A lot of students tell us that the moment their connected tools start talking to each other inside Opennote feels almost magical. The agent just knows them, and it's immensely helped keep new users on the platform.

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We chose Composio over Pipedream because it delivered depth where it mattered — niche tools and tricky edge cases other platforms simply ignored. That gave us confidence to scale without compromising.

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As a solo builder, shipping fast is life or death. The only way I can outcompete incumbents is by outmanoeuvring them. Getting bogged down managing agent auth would have been a death sentence.

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Before Composio, adding tool integrations was slow and resource-intensive. Each one could take weeks of engineering time, and maintaining them meant constantly keeping up with API changes.

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With hands-on help from their founder, we integrated Gmail and Google Drive in just 30 minutes. This level of personal support and commitment is exactly what startups should strive for.

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