# How to integrate Stack Ai MCP with Pydantic AI ```json { "title": "How to integrate Stack Ai MCP with Pydantic AI", "toolkit": "Stack Ai", "toolkit_slug": "stack_ai", "framework": "Pydantic AI", "framework_slug": "pydantic-ai", "url": "https://composio.dev/toolkits/stack_ai/framework/pydantic-ai", "markdown_url": "https://composio.dev/toolkits/stack_ai/framework/pydantic-ai.md", "updated_at": "2026-03-29T06:51:33.473Z" } ``` ## Introduction This guide walks you through connecting Stack Ai to Pydantic AI using the Composio tool router. By the end, you'll have a working Stack Ai agent that can list all running workflows in stack ai, trigger the monthly data sync workflow, get status of recent workflow runs through natural language commands. This guide will help you understand how to give your Pydantic AI agent real control over a Stack Ai account through Composio's Stack Ai MCP server. Before we dive in, let's take a quick look at the key ideas and tools involved. ## Also integrate Stack Ai with - [OpenAI Agents SDK](https://composio.dev/toolkits/stack_ai/framework/open-ai-agents-sdk) - [Claude Agent SDK](https://composio.dev/toolkits/stack_ai/framework/claude-agents-sdk) - [Claude Code](https://composio.dev/toolkits/stack_ai/framework/claude-code) - [Claude Cowork](https://composio.dev/toolkits/stack_ai/framework/claude-cowork) - [Codex](https://composio.dev/toolkits/stack_ai/framework/codex) - [OpenClaw](https://composio.dev/toolkits/stack_ai/framework/openclaw) - [Hermes](https://composio.dev/toolkits/stack_ai/framework/hermes-agent) - [CLI](https://composio.dev/toolkits/stack_ai/framework/cli) - [Google ADK](https://composio.dev/toolkits/stack_ai/framework/google-adk) - [LangChain](https://composio.dev/toolkits/stack_ai/framework/langchain) - [Vercel AI SDK](https://composio.dev/toolkits/stack_ai/framework/ai-sdk) - [Mastra AI](https://composio.dev/toolkits/stack_ai/framework/mastra-ai) - [LlamaIndex](https://composio.dev/toolkits/stack_ai/framework/llama-index) - [CrewAI](https://composio.dev/toolkits/stack_ai/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 Stack Ai - 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 Stack Ai 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 Stack Ai MCP server, and what's possible with it? The Stack Ai MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Stack Ai account. It provides structured and secure access so your agent can perform Stack Ai operations on your behalf. ## Supported Tools | Tool slug | Name | Description | |---|---|---| | `STACK_AI_CHECK_HEALTH` | Check Health | Tool to check the health status of the Stack AI API. Use to verify API availability and service status. | | `STACK_AI_GET_ACTION_INPUTS` | Get Action Inputs | Tool to retrieve the input schema for a specific provider action in Stack AI. Use when you need to understand what parameters are required for a provider action. | | `STACK_AI_GET_ACTION_OUTPUTS` | Get Action Output Schema | Tool to retrieve the output parameters schema for a Stack.ai provider action as JSON schema. Use when you need to understand what data fields an action returns or to validate action outputs. | | `STACK_AI_GET_CONNECTOR_TYPE_SCHEMA` | Get Connector Type Schema | Tool to retrieve the configuration schema for a specific connector type in Stack AI. Use when you need to understand what parameters are required to configure a connector. | | `STACK_AI_GET_LICENSE_STATUS` | Get License Status | Tool to retrieve the current Stack AI license status. Use when you need to check license validity, expiration date, or days remaining. | | `STACK_AI_GET_PROVIDER_DETAILS` | Get Provider Details | Tool to retrieve details of a specific Stack AI tool provider. Use when you need information about available actions, triggers, and configuration for a provider. | | `STACK_AI_GET_PROVIDER_ACTION_DETAILS` | Get Provider Action Details | Tool to get details of a specific action for a provider. Use when you need information about a provider's action including its parameters, description, and API details. | | `STACK_AI_GET_PROVIDER_ICON` | Get Provider Icon | Tool to fetch a provider icon image by provider identifier. Use when you need to retrieve the icon for a tool provider. | | `STACK_AI_GET_PROVIDER_TRIGGER_DETAILS` | Get Provider Trigger Details | Tool to retrieve detailed information about a specific trigger for a provider. Use when you need to understand the configuration, inputs, outputs, or behavior of a specific trigger. | | `STACK_AI_GET_ROOT` | Get Root | Tool to retrieve information from the Stack AI API root endpoint. Use when you need to verify API connectivity or get basic API information. | | `STACK_AI_GET_TRIGGER_DETAILS_FROM_PROVIDER` | Get Trigger Details From Provider | Tool to retrieve detailed information about a specific trigger from a provider. Use when you need to get trigger configuration, capabilities, or metadata for a specific provider's trigger. | | `STACK_AI_GET_TRIGGER_INPUTS` | Get Trigger Inputs | Tool to retrieve the input parameters for a trigger as a JSON schema. Use when discovering what data inputs a specific trigger requires before executing it. | | `STACK_AI_GET_TRIGGER_OUTPUTS` | Get Trigger Outputs | Tool to retrieve the output schema for a specific trigger in Stack AI. Use when you need to understand what fields a trigger will produce when it fires. This action helps discover the structure of data that will be available from a trigger event, which is useful for configuring workflows and data processing. | | `STACK_AI_LIST_CONNECTOR_TYPES` | List Connector Types | Tool to list all available connector types from Stack AI. Use when you need to retrieve the available connectors that can be configured. | | `STACK_AI_LIST_STACK_AI_INTEGRATIONS` | List Stack AI Integrations | Tool to list all available Stack AI integrations. Use when you need to discover available integrations, actions, and triggers in Stack AI. | | `STACK_AI_LIST_PERMISSION_GROUPS` | List Permission Groups | Tool to list all permission groups with their associated permissions. Use when you need to retrieve available permission groups and their permissions for access control management. | | `STACK_AI_LIST_PERMISSIONS` | List Permissions | Tool to list all available permissions in Stack AI. Use when you need to view or check available permission types. | | `STACK_AI_LIST_PROVIDER_TRIGGERS` | List Provider Triggers | Tool to get all available triggers for a specific provider. Use when you need to discover what trigger types are supported by a provider. | | `STACK_AI_LIST_STACK_AI_ACTIONS` | List Stack AI Actions | Tool to list all available Stack AI tool actions. Use when you need to discover available automation capabilities organized by provider. | | `STACK_AI_LIST_STACK_AI_PROVIDERS` | List Stack AI Providers | Tool to list all Stack AI tool providers (integrations). Use when you need to discover available integrations and their capabilities. Returns comprehensive information about each provider including available actions, triggers, and metadata. | | `STACK_AI_LIST_STACK_AI_BUILT_IN_TOOLS` | List Stack AI Built-in Tools | Tool to list all Stack AI built-in tools. Use when you need to discover available Stack AI native tools and their capabilities. | | `STACK_AI_LIST_STACK_AI_TRIGGERS` | List Stack AI Triggers | Tool to list all available Stack AI tool triggers. Use when you need to discover what triggers are available in the Stack AI platform. | ## Supported Triggers None listed. ## Creating MCP Server - Stand-alone vs Composio SDK The Stack Ai MCP server is an implementation of the Model Context Protocol that connects your AI agent to Stack Ai. It provides structured and secure access so your agent can perform Stack Ai 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 Stack Ai - 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 Stack Ai - MCPServerStreamableHTTP connects to the Stack Ai 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 Stack Ai 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 Stack Ai composio = Composio(api_key=api_key) session = composio.create( user_id=user_id, toolkits=["stack_ai"], ) 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 Stack Ai endpoint - The agent uses GPT-5 to interpret user commands and perform Stack Ai operations - The instructions field defines the agent's role and behavior ```python # Attach the MCP server to a Pydantic AI Agent stack_ai_mcp = MCPServerStreamableHTTP(url, headers={"x-api-key": COMPOSIO_API_KEY}) agent = Agent( "openai:gpt-5", toolsets=[stack_ai_mcp], instructions=( "You are a Stack Ai assistant. Use Stack Ai 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 - Stack Ai 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 Stack Ai.\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 Stack Ai composio = Composio(api_key=api_key) session = composio.create( user_id=user_id, toolkits=["stack_ai"], ) 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 stack_ai_mcp = MCPServerStreamableHTTP(url, headers={"x-api-key": COMPOSIO_API_KEY}) agent = Agent( "openai:gpt-5", toolsets=[stack_ai_mcp], instructions=( "You are a Stack Ai assistant. Use Stack Ai 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 Stack Ai.\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 Stack Ai through Composio's Tool Router. With this setup, your agent can perform real Stack Ai 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 + Stack Ai 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 Stack Ai MCP Agent with another framework - [OpenAI Agents SDK](https://composio.dev/toolkits/stack_ai/framework/open-ai-agents-sdk) - [Claude Agent SDK](https://composio.dev/toolkits/stack_ai/framework/claude-agents-sdk) - [Claude Code](https://composio.dev/toolkits/stack_ai/framework/claude-code) - [Claude Cowork](https://composio.dev/toolkits/stack_ai/framework/claude-cowork) - [Codex](https://composio.dev/toolkits/stack_ai/framework/codex) - [OpenClaw](https://composio.dev/toolkits/stack_ai/framework/openclaw) - [Hermes](https://composio.dev/toolkits/stack_ai/framework/hermes-agent) - [CLI](https://composio.dev/toolkits/stack_ai/framework/cli) - [Google ADK](https://composio.dev/toolkits/stack_ai/framework/google-adk) - [LangChain](https://composio.dev/toolkits/stack_ai/framework/langchain) - [Vercel AI SDK](https://composio.dev/toolkits/stack_ai/framework/ai-sdk) - [Mastra AI](https://composio.dev/toolkits/stack_ai/framework/mastra-ai) - [LlamaIndex](https://composio.dev/toolkits/stack_ai/framework/llama-index) - [CrewAI](https://composio.dev/toolkits/stack_ai/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. - [Composio](https://composio.dev/toolkits/composio) - Composio is an integration platform that connects AI agents with hundreds of business tools. It streamlines authentication and lets you trigger actions across services—no custom code needed. - [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. - [Composio search](https://composio.dev/toolkits/composio_search) - Composio search is a unified web search toolkit spanning travel, e-commerce, news, financial markets, images, and more. It lets you and your apps tap into up-to-date web data from a single, easy-to-integrate service. - [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. - [Perplexityai](https://composio.dev/toolkits/perplexityai) - Perplexityai delivers natural, conversational AI models for generating human-like text. Instantly get context-aware, high-quality responses for chat, search, or complex workflows. - [Browser tool](https://composio.dev/toolkits/browser_tool) - Browser tool is a virtual browser integration that lets AI agents interact with the web programmatically. It enables automated browsing, scraping, and action-taking from any AI workflow. - [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. - [Ai ml api](https://composio.dev/toolkits/ai_ml_api) - Ai ml api is a suite of AI/ML models for natural language and image tasks. It provides fast, scalable access to advanced AI capabilities for your apps and workflows. - [Aivoov](https://composio.dev/toolkits/aivoov) - Aivoov is an AI-powered text-to-speech platform offering 1,000+ voices in over 150 languages. Instantly turn written content into natural, human-like audio for any application. - [All images ai](https://composio.dev/toolkits/all_images_ai) - All-Images.ai is an AI-powered image generation and management platform. It helps you create, search, and organize images effortlessly with advanced AI capabilities. - [Anthropic administrator](https://composio.dev/toolkits/anthropic_administrator) - Anthropic administrator is an API for managing Anthropic organizational resources like members, workspaces, and API keys. It helps you automate admin tasks and streamline resource management across your Anthropic organization. - [Api labz](https://composio.dev/toolkits/api_labz) - Api labz is a platform offering a suite of AI-driven APIs and workflow tools. It helps developers automate tasks and build smarter, more efficient applications. ## Frequently Asked Questions ### What are the differences in Tool Router MCP and Stack Ai MCP? With a standalone Stack Ai MCP server, the agents and LLMs can only access a fixed set of Stack Ai tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Stack Ai 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 Stack Ai tools. ### Can I manage the permissions and scopes for Stack Ai while using Tool Router? Yes, absolutely. You can configure which Stack Ai 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 Stack Ai data and credentials are handled as safely as possible. --- [See all toolkits](https://composio.dev/toolkits) · [Composio docs](https://docs.composio.dev/llms.txt)