# How to integrate Leiga MCP with Pydantic AI ```json { "title": "How to integrate Leiga MCP with Pydantic AI", "toolkit": "Leiga", "toolkit_slug": "leiga", "framework": "Pydantic AI", "framework_slug": "pydantic-ai", "url": "https://composio.dev/toolkits/leiga/framework/pydantic-ai", "markdown_url": "https://composio.dev/toolkits/leiga/framework/pydantic-ai.md", "updated_at": "2026-05-12T10:17:20.469Z" } ``` ## Introduction This guide walks you through connecting Leiga to Pydantic AI using the Composio tool router. By the end, you'll have a working Leiga agent that can create a new project for q3 goals, assign tasks to marketing team members, update task status to completed for john through natural language commands. This guide will help you understand how to give your Pydantic AI agent real control over a Leiga account through Composio's Leiga MCP server. Before we dive in, let's take a quick look at the key ideas and tools involved. ## Also integrate Leiga with - [OpenAI Agents SDK](https://composio.dev/toolkits/leiga/framework/open-ai-agents-sdk) - [Claude Agent SDK](https://composio.dev/toolkits/leiga/framework/claude-agents-sdk) - [Claude Code](https://composio.dev/toolkits/leiga/framework/claude-code) - [Claude Cowork](https://composio.dev/toolkits/leiga/framework/claude-cowork) - [Codex](https://composio.dev/toolkits/leiga/framework/codex) - [OpenClaw](https://composio.dev/toolkits/leiga/framework/openclaw) - [Hermes](https://composio.dev/toolkits/leiga/framework/hermes-agent) - [CLI](https://composio.dev/toolkits/leiga/framework/cli) - [Google ADK](https://composio.dev/toolkits/leiga/framework/google-adk) - [LangChain](https://composio.dev/toolkits/leiga/framework/langchain) - [Vercel AI SDK](https://composio.dev/toolkits/leiga/framework/ai-sdk) - [Mastra AI](https://composio.dev/toolkits/leiga/framework/mastra-ai) - [LlamaIndex](https://composio.dev/toolkits/leiga/framework/llama-index) - [CrewAI](https://composio.dev/toolkits/leiga/framework/crew-ai) ## TL;DR Here's what you'll learn: - How to set up your Composio API key and User ID - How to create a Composio Tool Router session for Leiga - How to attach an MCP Server to a Pydantic AI agent - How to stream responses and maintain chat history - How to build a simple REPL-style chat interface to test your Leiga workflows ## What is Pydantic AI? Pydantic AI is a Python framework for building AI agents with strong typing and validation. It leverages Pydantic's data validation capabilities to create robust, type-safe AI applications. Key features include: - Type Safety: Built on Pydantic for automatic data validation - MCP Support: Native support for Model Context Protocol servers - Streaming: Built-in support for streaming responses - Async First: Designed for async/await patterns ## What is the Leiga MCP server, and what's possible with it? The Leiga MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Leiga account. It provides structured and secure access to your project management workspace, so your agent can perform actions like creating tasks, updating project boards, automating workflows, assigning team members, and tracking progress on your behalf. - Automated task creation and assignment: Let your agent generate new project tasks and assign them to the right team members with deadlines and priorities. - Project board updates and management: Have your agent move tasks across workflow stages, update statuses, and keep project boards organized in real time. - Team collaboration enhancements: Enable your agent to post updates, add comments, and notify relevant teammates about project changes or deadlines. - Progress tracking and reporting: Ask your agent to summarize project statuses, highlight overdue items, and generate progress reports for stakeholders. - Workflow automation and reminders: Set up the agent to automate routine project workflows and send reminders for upcoming tasks or milestones. ## Supported Tools | Tool slug | Name | Description | |---|---|---| | `LEIGA_CREATE_PROJECT` | Create Project | Tool to create a new project in Leiga. Use after gathering project details and authenticating. | | `LEIGA_GET_FILE_LIST` | Get File List | Tool to retrieve a paginated list of files in a specified directory. Use after obtaining the directory ID to view files. | | `LEIGA_GET_ISSUE_DETAIL_BY_ISSUE_NUMBER` | Get Issue Detail by Number | Tool to fetch detailed information about a specific issue using its issue number. Use when you have an issue number and need complete issue details. | | `LEIGA_GET_ISSUE_SCHEMA` | Get Issue Schema | Tool to retrieve the issue custom-field schema. Use when you need the full list of field configurations after selecting an issue type. | | `LEIGA_GET_PROJECT_INFORMATION` | Get Project Information | Tool to fetch detailed information about a specific project by its ID. Use when you need complete project metadata, including owner and members. | | `LEIGA_GET_PROJECT_OVERVIEW_TEMPLATE` | Get Project Overview Template | Tool to retrieve the project overview template. Use when you need the structured overview template for a project after confirming its ID. | | `LEIGA_GET_PROJECT_TEMPLATE_LIST` | Get Project Template List | Tool to retrieve a list of project templates. Use when browsing available templates before creating a new project. | | `LEIGA_GET_VERSION_LIST` | Get Version List | Tool to fetch list of versions for a specific platform. Use when you need to view all available versions before deployment. | | `LEIGA_GET_WEBHOOK_TYPE_LIST` | Get Webhook Type List | Tool to retrieve the list of available webhook types. Use when configuring webhooks and you need to know valid event types. | | `LEIGA_LIST_PROJECTS` | List Projects | Tool to list all projects available to the authenticated user. Use when you need to retrieve your projects in paginated form (e.g., page 1 with 10 per page). | ## Supported Triggers None listed. ## Creating MCP Server - Stand-alone vs Composio SDK The Leiga MCP server is an implementation of the Model Context Protocol that connects your AI agent to Leiga. It provides structured and secure access so your agent can perform Leiga 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: - Python 3.9 or higher - A Composio account with an active API key - Basic familiarity with Python and async programming ### 1. Getting API Keys for OpenAI and Composio OpenAI API Key - Go to the [OpenAI dashboard](https://platform.openai.com/settings/organization/api-keys) and create an API key. You'll need credits to use the models, or you can connect to another model provider. - Keep the API key safe. Composio API Key - Log in to the [Composio dashboard](https://dashboard.composio.dev?utm_source=toolkits&utm_medium=framework_docs). - Navigate to your API settings and generate a new API key. - Store this key securely as you'll need it for authentication. ### 2. Install dependencies Install the required libraries. What's happening: - composio connects your agent to external SaaS tools like Leiga - pydantic-ai lets you create structured AI agents with tool support - python-dotenv loads your environment variables securely from a .env file ```bash pip install composio pydantic-ai python-dotenv ``` ### 3. Set up environment variables Create a .env file in your project root. What's happening: - COMPOSIO_API_KEY authenticates your agent to Composio's API - USER_ID associates your session with your account for secure tool access - OPENAI_API_KEY to access OpenAI LLMs ```bash COMPOSIO_API_KEY=your_composio_api_key_here USER_ID=your_user_id_here OPENAI_API_KEY=your_openai_api_key ``` ### 4. Import dependencies What's happening: - We load environment variables and import required modules - Composio manages connections to Leiga - MCPServerStreamableHTTP connects to the Leiga MCP server endpoint - Agent from Pydantic AI lets you define and run the AI assistant ```python import asyncio import os from dotenv import load_dotenv from composio import Composio from pydantic_ai import Agent from pydantic_ai.mcp import MCPServerStreamableHTTP load_dotenv() ``` ### 5. Create a Tool Router Session What's happening: - We're creating a Tool Router session that gives your agent access to Leiga tools - The create method takes the user ID and specifies which toolkits should be available - The returned session.mcp.url is the MCP server URL that your agent will use ```python async def main(): api_key = os.getenv("COMPOSIO_API_KEY") user_id = os.getenv("USER_ID") if not api_key or not user_id: raise RuntimeError("Set COMPOSIO_API_KEY and USER_ID in your environment") # Create a Composio Tool Router session for Leiga composio = Composio(api_key=api_key) session = composio.create( user_id=user_id, toolkits=["leiga"], ) url = session.mcp.url if not url: raise ValueError("Composio session did not return an MCP URL") ``` ### 6. Initialize the Pydantic AI Agent What's happening: - The MCP client connects to the Leiga endpoint - The agent uses GPT-5 to interpret user commands and perform Leiga operations - The instructions field defines the agent's role and behavior ```python # Attach the MCP server to a Pydantic AI Agent leiga_mcp = MCPServerStreamableHTTP(url, headers={"x-api-key": COMPOSIO_API_KEY}) agent = Agent( "openai:gpt-5", toolsets=[leiga_mcp], instructions=( "You are a Leiga assistant. Use Leiga tools to help users " "with their requests. Ask clarifying questions when needed." ), ) ``` ### 7. Build the chat interface What's happening: - The agent reads input from the terminal and streams its response - Leiga API calls happen automatically under the hood - The model keeps conversation history to maintain context across turns ```python # Simple REPL with message history history = [] print("Chat started! Type 'exit' or 'quit' to end.\n") print("Try asking the agent to help you with Leiga.\n") while True: user_input = input("You: ").strip() if user_input.lower() in {"exit", "quit", "bye"}: print("\nGoodbye!") break if not user_input: continue print("\nAgent is thinking...\n", flush=True) async with agent.run_stream(user_input, message_history=history) as stream_result: collected_text = "" async for chunk in stream_result.stream_output(): text_piece = None if isinstance(chunk, str): text_piece = chunk elif hasattr(chunk, "delta") and isinstance(chunk.delta, str): text_piece = chunk.delta elif hasattr(chunk, "text"): text_piece = chunk.text if text_piece: collected_text += text_piece result = stream_result print(f"Agent: {collected_text}\n") history = result.all_messages() ``` ### 8. Run the application What's happening: - The asyncio loop launches the agent and keeps it running until you exit ```python if __name__ == "__main__": asyncio.run(main()) ``` ## Complete Code ```python import asyncio import os from dotenv import load_dotenv from composio import Composio from pydantic_ai import Agent from pydantic_ai.mcp import MCPServerStreamableHTTP load_dotenv() async def main(): api_key = os.getenv("COMPOSIO_API_KEY") user_id = os.getenv("USER_ID") if not api_key or not user_id: raise RuntimeError("Set COMPOSIO_API_KEY and USER_ID in your environment") # Create a Composio Tool Router session for Leiga composio = Composio(api_key=api_key) session = composio.create( user_id=user_id, toolkits=["leiga"], ) url = session.mcp.url if not url: raise ValueError("Composio session did not return an MCP URL") # Attach the MCP server to a Pydantic AI Agent leiga_mcp = MCPServerStreamableHTTP(url, headers={"x-api-key": COMPOSIO_API_KEY}) agent = Agent( "openai:gpt-5", toolsets=[leiga_mcp], instructions=( "You are a Leiga assistant. Use Leiga tools to help users " "with their requests. Ask clarifying questions when needed." ), ) # Simple REPL with message history history = [] print("Chat started! Type 'exit' or 'quit' to end.\n") print("Try asking the agent to help you with Leiga.\n") while True: user_input = input("You: ").strip() if user_input.lower() in {"exit", "quit", "bye"}: print("\nGoodbye!") break if not user_input: continue print("\nAgent is thinking...\n", flush=True) async with agent.run_stream(user_input, message_history=history) as stream_result: collected_text = "" async for chunk in stream_result.stream_output(): text_piece = None if isinstance(chunk, str): text_piece = chunk elif hasattr(chunk, "delta") and isinstance(chunk.delta, str): text_piece = chunk.delta elif hasattr(chunk, "text"): text_piece = chunk.text if text_piece: collected_text += text_piece result = stream_result print(f"Agent: {collected_text}\n") history = result.all_messages() if __name__ == "__main__": asyncio.run(main()) ``` ## Conclusion You've built a Pydantic AI agent that can interact with Leiga through Composio's Tool Router. With this setup, your agent can perform real Leiga actions through natural language. You can extend this further by: - Adding other toolkits like Gmail, HubSpot, or Salesforce - Building a web-based chat interface around this agent - Using multiple MCP endpoints to enable cross-app workflows (for example, Gmail + Leiga for workflow automation) This architecture makes your AI agent "agent-native", able to securely use APIs in a unified, composable way without custom integrations. ## How to build Leiga MCP Agent with another framework - [OpenAI Agents SDK](https://composio.dev/toolkits/leiga/framework/open-ai-agents-sdk) - [Claude Agent SDK](https://composio.dev/toolkits/leiga/framework/claude-agents-sdk) - [Claude Code](https://composio.dev/toolkits/leiga/framework/claude-code) - [Claude Cowork](https://composio.dev/toolkits/leiga/framework/claude-cowork) - [Codex](https://composio.dev/toolkits/leiga/framework/codex) - [OpenClaw](https://composio.dev/toolkits/leiga/framework/openclaw) - [Hermes](https://composio.dev/toolkits/leiga/framework/hermes-agent) - [CLI](https://composio.dev/toolkits/leiga/framework/cli) - [Google ADK](https://composio.dev/toolkits/leiga/framework/google-adk) - [LangChain](https://composio.dev/toolkits/leiga/framework/langchain) - [Vercel AI SDK](https://composio.dev/toolkits/leiga/framework/ai-sdk) - [Mastra AI](https://composio.dev/toolkits/leiga/framework/mastra-ai) - [LlamaIndex](https://composio.dev/toolkits/leiga/framework/llama-index) - [CrewAI](https://composio.dev/toolkits/leiga/framework/crew-ai) ## Related Toolkits - [Google Sheets](https://composio.dev/toolkits/googlesheets) - Google Sheets is a cloud-based spreadsheet tool for real-time collaboration and data analysis. It lets teams work together from anywhere, updating information instantly. - [Notion](https://composio.dev/toolkits/notion) - Notion is a collaborative workspace for notes, docs, wikis, and tasks. It streamlines team knowledge, project tracking, and workflow customization in one place. - [Airtable](https://composio.dev/toolkits/airtable) - Airtable combines the flexibility of spreadsheets with the power of a database for easy project and data management. Teams use Airtable to organize, track, and collaborate with custom views and automations. - [Asana](https://composio.dev/toolkits/asana) - Asana is a collaborative work management platform for teams to organize and track projects. It streamlines teamwork, boosts productivity, and keeps everyone aligned on goals. - [Google Tasks](https://composio.dev/toolkits/googletasks) - Google Tasks is a to-do list and task management tool integrated into Gmail and Google Calendar. It helps you organize, track, and complete tasks across your Google ecosystem. - [Linear](https://composio.dev/toolkits/linear) - Linear is a modern issue tracking and project planning tool for fast-moving teams. It helps streamline workflows, organize projects, and boost productivity. - [Jira](https://composio.dev/toolkits/jira) - Jira is Atlassian’s platform for bug tracking, issue tracking, and agile project management. It helps teams organize work, prioritize tasks, and deliver projects efficiently. - [Clickup](https://composio.dev/toolkits/clickup) - ClickUp is an all-in-one productivity platform for managing tasks, docs, goals, and team collaboration. It streamlines project workflows so teams can work smarter and stay organized in one place. - [Monday](https://composio.dev/toolkits/monday) - Monday.com is a customizable work management platform for project planning and collaboration. It helps teams organize tasks, automate workflows, and track progress in real time. - [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. - [Agiled](https://composio.dev/toolkits/agiled) - Agiled is an all-in-one business management platform for CRM, projects, and finance. It helps you streamline workflows, consolidate client data, and manage business processes in one place. - [Ascora](https://composio.dev/toolkits/ascora) - Ascora is a cloud-based field service management platform for service businesses. It streamlines scheduling, invoicing, and customer operations in one place. - [Basecamp](https://composio.dev/toolkits/basecamp) - Basecamp is a project management and team collaboration tool by 37signals. It helps teams organize tasks, share files, and communicate efficiently in one place. - [Beeminder](https://composio.dev/toolkits/beeminder) - Beeminder is an online goal-tracking platform that uses monetary pledges to keep you motivated. Stay accountable and hit your targets with real financial incentives. - [Boxhero](https://composio.dev/toolkits/boxhero) - Boxhero is a cloud-based inventory management platform for SMBs, offering real-time updates, barcode scanning, and team collaboration. It helps businesses streamline stock tracking and analytics for smarter inventory decisions. - [Breathe HR](https://composio.dev/toolkits/breathehr) - Breathe HR is cloud-based HR software for SMEs to manage employee data, absences, and performance. It simplifies HR admin, making it easy to keep employee records accurate and up to date. - [Breeze](https://composio.dev/toolkits/breeze) - Breeze is a project management platform designed to help teams plan, track, and collaborate on projects. It streamlines workflows and keeps everyone on the same page. - [Bugherd](https://composio.dev/toolkits/bugherd) - Bugherd is a visual feedback and bug tracking tool for websites. It helps teams and clients report website issues directly on live sites for faster fixes. - [Canny](https://composio.dev/toolkits/canny) - Canny is a platform for managing customer feedback and feature requests. It helps teams prioritize product decisions based on real user insights. - [Chmeetings](https://composio.dev/toolkits/chmeetings) - Chmeetings is a church management platform for events, members, donations, and volunteers. It streamlines church operations and improves community engagement. ## Frequently Asked Questions ### What are the differences in Tool Router MCP and Leiga MCP? With a standalone Leiga MCP server, the agents and LLMs can only access a fixed set of Leiga tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Leiga and many other apps based on the task at hand, all through a single MCP endpoint. ### Can I use Tool Router MCP with Pydantic AI? Yes, you can. Pydantic AI 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 Leiga tools. ### Can I manage the permissions and scopes for Leiga while using Tool Router? Yes, absolutely. You can configure which Leiga 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 Leiga data and credentials are handled as safely as possible. --- [See all toolkits](https://composio.dev/toolkits) · [Composio docs](https://docs.composio.dev/llms.txt)