# How to integrate Opencage MCP with Google ADK ```json { "title": "How to integrate Opencage MCP with Google ADK", "toolkit": "Opencage", "toolkit_slug": "opencage", "framework": "Google ADK", "framework_slug": "google-adk", "url": "https://composio.dev/toolkits/opencage/framework/google-adk", "markdown_url": "https://composio.dev/toolkits/opencage/framework/google-adk.md", "updated_at": "2026-05-12T10:20:50.267Z" } ``` ## Introduction This guide walks you through connecting Opencage to Google ADK using the Composio tool router. By the end, you'll have a working Opencage agent that can get coordinates for a hotel address, find the address of given gps coordinates, return geojson for a city location through natural language commands. This guide will help you understand how to give your Google ADK agent real control over a Opencage account through Composio's Opencage MCP server. Before we dive in, let's take a quick look at the key ideas and tools involved. ## Also integrate Opencage with - [OpenAI Agents SDK](https://composio.dev/toolkits/opencage/framework/open-ai-agents-sdk) - [Claude Agent SDK](https://composio.dev/toolkits/opencage/framework/claude-agents-sdk) - [Claude Code](https://composio.dev/toolkits/opencage/framework/claude-code) - [Claude Cowork](https://composio.dev/toolkits/opencage/framework/claude-cowork) - [Codex](https://composio.dev/toolkits/opencage/framework/codex) - [OpenClaw](https://composio.dev/toolkits/opencage/framework/openclaw) - [Hermes](https://composio.dev/toolkits/opencage/framework/hermes-agent) - [CLI](https://composio.dev/toolkits/opencage/framework/cli) - [LangChain](https://composio.dev/toolkits/opencage/framework/langchain) - [Vercel AI SDK](https://composio.dev/toolkits/opencage/framework/ai-sdk) - [Mastra AI](https://composio.dev/toolkits/opencage/framework/mastra-ai) - [LlamaIndex](https://composio.dev/toolkits/opencage/framework/llama-index) - [CrewAI](https://composio.dev/toolkits/opencage/framework/crew-ai) ## TL;DR Here's what you'll learn: - Get a Opencage account set up and connected to Composio - Install the Google ADK and Composio packages - Create a Composio Tool Router session for Opencage - Build an agent that connects to Opencage through MCP - Interact with Opencage 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 Opencage MCP server, and what's possible with it? The Opencage MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Opencage account. It provides structured and secure access to global geocoding services, so your agent can perform actions like translating addresses to coordinates, finding locations from GPS, converting to GeoJSON, and handling multiple output formats on your behalf. - Forward geocoding for addresses: Instantly convert human-readable addresses into precise latitude and longitude coordinates for mapping or logistics tasks. - Reverse geocoding coordinates: Give your agent raw GPS coordinates and receive the nearest human-readable address or location details. - GeoJSON feature generation: Request GeoJSON output for geocoding results, making it easy to visualize or integrate locations in mapping applications. - Flexible output formats: Get geocoding data in XML or JSONP formats, ensuring compatibility with a variety of development workflows and systems. - Seamless integration with open data sources: Tap into comprehensive and up-to-date location information sourced from open datasets for global coverage. ## Supported Tools | Tool slug | Name | Description | |---|---|---| | `OPENCAGE_GEOCODE_FORWARD` | Forward Geocode Address | Tool to convert a human-readable address into geographic coordinates. Use when you need to retrieve latitude and longitude from an address. | | `OPENCAGE_GEOCODE_GEOJSON` | Geocode to GeoJSON | Geocode addresses or coordinates and return results in GeoJSON FeatureCollection format. Use this tool when you need: - Geographic data in standard GeoJSON format for mapping applications - Forward geocoding: convert addresses to coordinates - Reverse geocoding: convert coordinates to addresses The response includes coordinates, formatted addresses, and optional annotations like timezone, currency, and sun times for each location. | | `OPENCAGE_GEOCODE_GEOJSONP` | Geocode with JSONP | Geocode an address and return results wrapped in a JavaScript callback function (JSONP format). Use this tool when you need geocoding results that can be directly consumed by JavaScript through a callback function, typically for cross-domain AJAX requests in browser environments. The response wraps standard geocoding JSON with your specified callback function name. Example response: myCallback({"results":[{"geometry":{"lat":52.5,"lng":13.4},"formatted":"Berlin, Germany",...}],...}) | | `OPENCAGE_GEOCODE_GOOGLE_V3_JSON` | Geocode Google v3 JSON | Tool to perform forward geocoding and return results in Google Geocoding API v3 compatible JSON format. Use when you need Google v3 compatible output for legacy integrations. Note: This is a legacy format that may be discontinued; using the standard JSON format is recommended. | | `OPENCAGE_GEOCODE_REVERSE` | Reverse Geocode Coordinates | Tool to convert coordinates to a human-readable address. Use when you have latitude and longitude and need a readable location. | | `OPENCAGE_GEOCODE_XML` | Geocode XML | Geocode a location query and return results in XML format. Supports both forward geocoding (address to coordinates) and reverse geocoding (coordinates to address). Use this when you need XML-formatted output instead of JSON. | | `OPENCAGE_PING_OPENCAGE` | Check API Health | Tool to check API health and connectivity. Returns 'pong' if the API is reachable. Use when you need to verify that the OpenCage API is accessible and operational. | ## Supported Triggers None listed. ## Creating MCP Server - Stand-alone vs Composio SDK The Opencage MCP server is an implementation of the Model Context Protocol that connects your AI agent to Opencage. It provides structured and secure access so your agent can perform Opencage operations on your behalf through a secure, permission-based interface. With Composio's managed implementation, you don't have to create your own developer app. For production, if you're building an end product, we recommend using your own credentials. The managed server helps you prototype fast and go from 0-1 faster. ## Step-by-step Guide ### 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 ### 1. Getting API Keys for Google and Composio Google API Key - Go to [Google AI Studio](https://aistudio.google.com/app/apikey) 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](https://dashboard.composio.dev?utm_source=toolkits&utm_medium=framework_docs). - 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. ### 2. Install dependencies Inside your virtual environment, install the required packages. What's happening: - google-adk is Google's Agents Development Kit - composio connects your agent to Opencage via MCP - python-dotenv loads environment variables ```bash pip install google-adk composio python-dotenv ``` ### 3. Set up ADK project Set up a new Google ADK project. What's happening: - This creates an agent folder with a root agent file and .env file ```bash adk create my_agent ``` ### 4. Set environment variables 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 ```bash GOOGLE_API_KEY=your-google-api-key COMPOSIO_API_KEY=your-composio-api-key COMPOSIO_USER_ID=your-user-id-or-email ``` ### 5. Import modules and validate 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 ```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.") ``` ### 6. Create Composio client and Tool Router session 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 ```python composio_client = Composio(api_key=COMPOSIO_API_KEY) composio_session = composio_client.create( user_id=COMPOSIO_USER_ID, toolkits=["opencage"], ) COMPOSIO_MCP_URL = composio_session.mcp.url, print(f"Composio MCP URL: {COMPOSIO_MCP_URL}") ``` ### 7. Set up the McpToolset and create the Agent 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 ```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 Opencage operations." ), tools=[composio_toolset], ) print("\nAgent setup complete. You can now run this agent directly ;)") ``` ### 8. Run the agent 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 ```bash # Run in CLI mode adk run my_agent # Or run in web UI mode adk web ``` ## Complete Code ```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=["opencage"], ) 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 Opencage operations." ), tools=[composio_toolset], ) print("\nAgent setup complete. You can now run this agent directly ;)") ``` ## Conclusion You've successfully integrated Opencage with the Google ADK through Composio's MCP Tool Router. Your agent can now interact with Opencage using natural language commands. Key takeaways: - The Tool Router approach dynamically routes requests to the appropriate Opencage 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 Opencage MCP Agent with another framework - [OpenAI Agents SDK](https://composio.dev/toolkits/opencage/framework/open-ai-agents-sdk) - [Claude Agent SDK](https://composio.dev/toolkits/opencage/framework/claude-agents-sdk) - [Claude Code](https://composio.dev/toolkits/opencage/framework/claude-code) - [Claude Cowork](https://composio.dev/toolkits/opencage/framework/claude-cowork) - [Codex](https://composio.dev/toolkits/opencage/framework/codex) - [OpenClaw](https://composio.dev/toolkits/opencage/framework/openclaw) - [Hermes](https://composio.dev/toolkits/opencage/framework/hermes-agent) - [CLI](https://composio.dev/toolkits/opencage/framework/cli) - [LangChain](https://composio.dev/toolkits/opencage/framework/langchain) - [Vercel AI SDK](https://composio.dev/toolkits/opencage/framework/ai-sdk) - [Mastra AI](https://composio.dev/toolkits/opencage/framework/mastra-ai) - [LlamaIndex](https://composio.dev/toolkits/opencage/framework/llama-index) - [CrewAI](https://composio.dev/toolkits/opencage/framework/crew-ai) ## Related Toolkits - [Excel](https://composio.dev/toolkits/excel) - Microsoft Excel is a robust spreadsheet application for organizing, analyzing, and visualizing data. It's the go-to tool for calculations, reporting, and flexible data management. - [21risk](https://composio.dev/toolkits/_21risk) - 21RISK is a web app built for easy checklist, audit, and compliance management. It streamlines risk processes so teams can focus on what matters. - [Abstract](https://composio.dev/toolkits/abstract) - Abstract provides a suite of APIs for automating data validation and enrichment tasks. It helps developers streamline workflows and ensure data quality with minimal effort. - [Addressfinder](https://composio.dev/toolkits/addressfinder) - Addressfinder is a data quality platform for verifying addresses, emails, and phone numbers. It helps you ensure accurate customer and contact data every time. - [Agenty](https://composio.dev/toolkits/agenty) - Agenty is a web scraping and automation platform for extracting data and automating browser tasks—no coding needed. It streamlines data collection, monitoring, and repetitive online actions. - [Ambee](https://composio.dev/toolkits/ambee) - Ambee is an environmental data platform providing real-time, hyperlocal APIs for air quality, weather, and pollen. Get precise environmental insights to power smarter decisions in your apps and workflows. - [Ambient weather](https://composio.dev/toolkits/ambient_weather) - Ambient Weather is a platform for personal weather stations with a robust API for accessing local, real-time, and historical weather data. Get detailed environmental insights directly from your own sensors for smarter apps and automations. - [Anonyflow](https://composio.dev/toolkits/anonyflow) - Anonyflow is a service for encryption-based data anonymization and secure data sharing. It helps organizations meet GDPR, CCPA, and HIPAA data privacy compliance requirements. - [Api ninjas](https://composio.dev/toolkits/api_ninjas) - Api ninjas offers 120+ public APIs spanning categories like weather, finance, sports, and more. Developers use it to supercharge apps with real-time data and actionable endpoints. - [Api sports](https://composio.dev/toolkits/api_sports) - Api sports is a comprehensive sports data platform covering 2,000+ competitions with live scores and 15+ years of stats. Instantly access up-to-date sports information for analysis, apps, or chatbots. - [Apify](https://composio.dev/toolkits/apify) - Apify is a cloud platform for building, deploying, and managing web scraping and automation tools called Actors. It lets you automate data extraction and workflow tasks at scale—no infrastructure headaches. - [Autom](https://composio.dev/toolkits/autom) - Autom is a lightning-fast search engine results data platform for Google, Bing, and Brave. Developers use it to access fresh, low-latency SERP data on demand. - [Beaconchain](https://composio.dev/toolkits/beaconchain) - Beaconchain is a real-time analytics platform for Ethereum 2.0's Beacon Chain. It provides detailed insights into validators, blocks, and overall network performance. - [Big data cloud](https://composio.dev/toolkits/big_data_cloud) - BigDataCloud provides APIs for geolocation, reverse geocoding, and address validation. Instantly access reliable location intelligence to enhance your applications and workflows. - [Bigpicture io](https://composio.dev/toolkits/bigpicture_io) - BigPicture.io offers APIs for accessing detailed company and profile data. Instantly enrich your applications with up-to-date insights on 20M+ businesses. - [Bitquery](https://composio.dev/toolkits/bitquery) - Bitquery is a blockchain data platform offering indexed, real-time, and historical data from 40+ blockchains via GraphQL APIs. Get unified, reliable access to complex on-chain data for analytics, trading, and research. - [Brightdata](https://composio.dev/toolkits/brightdata) - Brightdata is a leading web data platform offering advanced scraping, SERP APIs, and anti-bot tools. It lets you collect public web data at scale, bypassing blocks and friction. - [Builtwith](https://composio.dev/toolkits/builtwith) - BuiltWith is a web technology profiler that uncovers the technologies powering any website. Gain actionable insights into analytics, hosting, and content management stacks for smarter research and lead generation. - [Byteforms](https://composio.dev/toolkits/byteforms) - Byteforms is an all-in-one platform for creating forms, managing submissions, and integrating data. It streamlines workflows by centralizing form data collection and automation. - [Cabinpanda](https://composio.dev/toolkits/cabinpanda) - Cabinpanda is a data collection platform for building and managing online forms. It helps streamline how you gather, organize, and analyze responses. ## Frequently Asked Questions ### What are the differences in Tool Router MCP and Opencage MCP? With a standalone Opencage MCP server, the agents and LLMs can only access a fixed set of Opencage tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Opencage 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 Opencage tools. ### Can I manage the permissions and scopes for Opencage while using Tool Router? Yes, absolutely. You can configure which Opencage 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 Opencage data and credentials are handled as safely as possible. --- [See all toolkits](https://composio.dev/toolkits) · [Composio docs](https://docs.composio.dev/llms.txt)