# How to integrate Unione MCP with Mastra AI ```json { "title": "How to integrate Unione MCP with Mastra AI", "toolkit": "Unione", "toolkit_slug": "unione", "framework": "Mastra AI", "framework_slug": "mastra-ai", "url": "https://composio.dev/toolkits/unione/framework/mastra-ai", "markdown_url": "https://composio.dev/toolkits/unione/framework/mastra-ai.md", "updated_at": "2026-05-12T10:29:27.544Z" } ``` ## Introduction This guide walks you through connecting Unione to Mastra AI using the Composio tool router. By the end, you'll have a working Unione agent that can check your current unione email balance, cancel a scheduled email by job id, list all sender domains and their status through natural language commands. This guide will help you understand how to give your Mastra AI agent real control over a Unione account through Composio's Unione MCP server. Before we dive in, let's take a quick look at the key ideas and tools involved. ## Also integrate Unione with - [OpenAI Agents SDK](https://composio.dev/toolkits/unione/framework/open-ai-agents-sdk) - [Claude Agent SDK](https://composio.dev/toolkits/unione/framework/claude-agents-sdk) - [Claude Code](https://composio.dev/toolkits/unione/framework/claude-code) - [Claude Cowork](https://composio.dev/toolkits/unione/framework/claude-cowork) - [Codex](https://composio.dev/toolkits/unione/framework/codex) - [OpenClaw](https://composio.dev/toolkits/unione/framework/openclaw) - [Hermes](https://composio.dev/toolkits/unione/framework/hermes-agent) - [CLI](https://composio.dev/toolkits/unione/framework/cli) - [Google ADK](https://composio.dev/toolkits/unione/framework/google-adk) - [LangChain](https://composio.dev/toolkits/unione/framework/langchain) - [Vercel AI SDK](https://composio.dev/toolkits/unione/framework/ai-sdk) - [LlamaIndex](https://composio.dev/toolkits/unione/framework/llama-index) - [CrewAI](https://composio.dev/toolkits/unione/framework/crew-ai) ## TL;DR Here's what you'll learn: - Set up your environment so Mastra, OpenAI, and Composio work together - Create a Tool Router session in Composio that exposes Unione tools - Connect Mastra's MCP client to the Composio generated MCP URL - Fetch Unione tool definitions and attach them as a toolset - Build a Mastra agent that can reason, call tools, and return structured results - Run an interactive CLI where you can chat with your Unione agent ## What is Mastra AI? Mastra AI is a TypeScript framework for building AI agents with tool support. It provides a clean API for creating agents that can use external services through MCP. Key features include: - MCP Client: Built-in support for Model Context Protocol servers - Toolsets: Organize tools into logical groups - Step Callbacks: Monitor and debug agent execution - OpenAI Integration: Works with OpenAI models via @ai-sdk/openai ## What is the Unione MCP server, and what's possible with it? The Unione MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Unione account. It provides structured and secure access to your Unione email delivery service, so your agent can send transactional or marketing emails, manage sending domains, monitor delivery events, check account balance, and automate email operations on your behalf. - Automated email sending and scheduling: Have your agent send transactional or marketing emails and even schedule deliveries right from your Unione account. - Domain verification and management: Easily manage sender domains, trigger domain verifications, and handle DNS/DKIM checks to keep your emails deliverable. - Event monitoring and export: Let your agent fetch specific email events, retrieve delivery metrics, or export comprehensive email event logs for auditing and analytics. - Account balance and plan checks: Quickly access your current email balance and subscription plan details, ensuring you stay within your sending limits. - Email job and pricing insights: Retrieve detailed information about specific email jobs and get up-to-date pricing for cost management before sending campaigns. ## Supported Tools | Tool slug | Name | Description | |---|---|---| | `UNIONE_DELETE_EVENT_DUMP` | Delete Event Dump | Tool to delete an event dump file and remove it from the queue or storage. Use when you need to clean up an existing event dump by its dump_id. | | `UNIONE_DELETE_TEMPLATE` | Delete Template | Tool to delete a template by ID. Use when you need to permanently remove a template from the account. | | `UNIONE_DELETE_WEBHOOK` | Delete Webhook | Tool to delete a webhook event notification handler by its URL. Use when you need to stop receiving callback notifications for a specific webhook. | | `UNIONE_EMAIL_BALANCE` | UniOne Email Balance | Tool to retrieve current account balance. Use when you need to check your email usage and limits before sending large campaigns. | | `UNIONE_EMAIL_CANCEL` | Cancel Scheduled Email | Tool to cancel a scheduled transactional email by its job ID. Use when you need to stop a pending email send before it's dispatched. | | `UNIONE_EMAIL_DOMAIN` | UniOne Email Domain Management | Tool to manage sender domains in UniOne. Use when you need DNS records for verification, trigger verification or DKIM checks, list domains, or delete a domain. | | `UNIONE_EMAIL_EVENT_GET` | Get Email Event | Tool to retrieve details of a specific email event by its ID. Use when you need event information for auditing or diagnostics. | | `UNIONE_EMAIL_GET` | Get Email Send Job | Tool to retrieve detailed information about a specific email send job. Use when you need its delivery metrics and history. | | `UNIONE_EMAIL_LIST` | UniOne Email List (Export) | Tool to export email events within a specified time frame. It creates an asynchronous event dump which can later be downloaded and parsed using UNIONE_EVENT_DUMP_GET. | | `UNIONE_EMAIL_RESEND` | Resend Sent Email | Tool to resend a previously sent email by its job ID. Use when you need to trigger a resend of an email that has already been sent and you have the original job ID. | | `UNIONE_EMAIL_RESUBSCRIBE` | UniOne Email Resubscribe | Tool to resubscribe a recipient who previously unsubscribed. Use when you need to restore a user's subscription status after they opt in again. | | `UNIONE_EMAIL_RESUME` | Resume Paused Email | Tool to resume a paused transactional email by its job ID. Use when you need to restart a paused pending email send. | | `UNIONE_EMAIL_SMTP` | UniOne Email SMTP Configuration | Tool to retrieve SMTP server details and credentials. Use when you need to configure your mail client or library for SMTP sending. | | `UNIONE_EMAIL_STATISTICS` | UniOne Email Statistics | Tool to retrieve email sending statistics over a specified time range. This action uses UniOne's event-dump aggregate API under the hood to compute daily statistics. | | `UNIONE_EMAIL_UNSUBSCRIBE` | UniOne Email Unsubscribe | Tool to unsubscribe an email from future emails. Use when you need to stop all further transactional emails. | | `UNIONE_EMAIL_VALIDATE_BATCH` | Batch Email Validation | Tool to validate multiple email addresses in a batch. Use when you need to verify deliverability for a list of emails at once. | | `UNIONE_EMAIL_VALIDATE_DELETE` | Remove Email from Suppression List | Tool to remove an email from the suppression list. Use when you need to re-enable sending emails to an address that was previously unsubscribed or suppressed. | | `UNIONE_EMAIL_VALIDATE_RETRY` | Retry Email Validation | Tool to retry an email validation request. Updated to re-run validation via the official single validation endpoint using the provided email address. | | `UNIONE_EMAIL_WEBHOOK_TYPES` | UniOne Email Webhook Types | Tool to retrieve supported email webhook event types. Use when configuring your webhook callbacks. | | `UNIONE_EVENT_DUMP_CREATE` | Create Event Dump | Tool to create an asynchronous CSV event dump. Use when you need to export transactional email events for a specified time window. | | `UNIONE_EVENT_DUMP_LIST` | UniOne Event Dump List | Tool to retrieve the full list of event dumps. Use when you need to view all existing event-dump tasks. | | `UNIONE_GET_EVENT_DUMP` | Get Event Dump | Tool to retrieve the status and download URLs of an event dump. Use when you need to check if a dump is ready and get its files. | | `UNIONE_GET_SUPPRESSION` | Get Email Suppression Details | Tool to check if an email is suppressed and retrieve the reason and date. Use when verifying why an email cannot receive messages. | | `UNIONE_GET_TEMPLATE` | Get Template | Tool to get template properties by ID. Use when you need to retrieve the full template configuration and content for a specific template. | | `UNIONE_GET_WEBHOOK` | Get Webhook Configuration | Tool to retrieve webhook configuration by its URL. Use when you need to check the current settings of an event notification handler. | | `UNIONE_SCHEDULE_EMAIL` | Schedule Email | Tool to schedule a transactional email up to 24 hours ahead. Use when you need to send an email at a specific future time. | | `UNIONE_SUPPRESSION_LIST` | Suppression List | Tool to return the suppression list since a given date. Use when auditing bounced, unsubscribed, or blocked recipients. | | `UNIONE_TAG_DELETE` | Delete Tag | Tool to delete a specific tag. Use when you have confirmed the tag ID you wish to remove. | | `UNIONE_TAG_LIST` | UniOne Tag List | Tool to retrieve all user-defined tags. Use when you need to fetch the full list of tags after authentication. | | `UNIONE_TEMPLATE_LIST` | UniOne Template List | Tool to list email templates. Use when you need to retrieve available templates for transactional emails. | | `UNIONE_TEMPLATE_SET` | Set Template | Tool to set or update an email template. Use when you need to create or modify transactional email templates before sending messages. | | `UNIONE_WEBHOOK_SET` | Set Webhook | Tool to set or edit a webhook event notification handler. Use when you need to configure your webhook for event callbacks. | ## Supported Triggers None listed. ## Creating MCP Server - Stand-alone vs Composio SDK The Unione MCP server is an implementation of the Model Context Protocol that connects your AI agent to Unione. It provides structured and secure access so your agent can perform Unione 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: - Node.js 18 or higher - A Composio account with an active API key - An OpenAI API key - Basic familiarity with TypeScript ### 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 need credits or a connected billing setup to use the models. - Store the key somewhere safe. Composio API Key - Log in to the [Composio dashboard](https://dashboard.composio.dev?utm_source=toolkits&utm_medium=framework_docs). - Go to Settings and copy your API key. - This key lets your Mastra agent talk to Composio and reach Unione through MCP. ### 2. Install dependencies Install the required packages. What's happening: - @composio/core is the Composio SDK for creating MCP sessions - @mastra/core provides the Agent class - @mastra/mcp is Mastra's MCP client - @ai-sdk/openai is the model wrapper for OpenAI - dotenv loads environment variables from .env ```bash npm install @composio/core @mastra/core @mastra/mcp @ai-sdk/openai dotenv ``` ### 3. Set up environment variables Create a .env file in your project root. What's happening: - COMPOSIO_API_KEY authenticates your requests to Composio - COMPOSIO_USER_ID tells Composio which user this session belongs to - OPENAI_API_KEY lets the Mastra agent call OpenAI models ```bash COMPOSIO_API_KEY=your_composio_api_key_here COMPOSIO_USER_ID=your_user_id_here OPENAI_API_KEY=your_openai_api_key_here ``` ### 4. Import libraries and validate environment What's happening: - dotenv/config auto loads your .env so process.env.* is available - openai gives you a Mastra compatible model wrapper - Agent is the Mastra agent that will call tools and produce answers - MCPClient connects Mastra to your Composio MCP server - Composio is used to create a Tool Router session ```typescript import "dotenv/config"; import { openai } from "@ai-sdk/openai"; import { Agent } from "@mastra/core/agent"; import { MCPClient } from "@mastra/mcp"; import { Composio } from "@composio/core"; import * as readline from "readline"; import type { AiMessageType } from "@mastra/core/agent"; const openaiAPIKey = process.env.OPENAI_API_KEY; const composioAPIKey = process.env.COMPOSIO_API_KEY; const composioUserID = process.env.COMPOSIO_USER_ID; if (!openaiAPIKey) throw new Error("OPENAI_API_KEY is not set"); if (!composioAPIKey) throw new Error("COMPOSIO_API_KEY is not set"); if (!composioUserID) throw new Error("COMPOSIO_USER_ID is not set"); const composio = new Composio({ apiKey: composioAPIKey as string, }); ``` ### 5. Create a Tool Router session for Unione What's happening: - create spins up a short-lived MCP HTTP endpoint for this user - The toolkits array contains "unione" for Unione access - session.mcp.url is the MCP URL that Mastra's MCPClient will connect to ```typescript async function main() { const session = await composio.create( composioUserID as string, { toolkits: ["unione"], }, ); const composioMCPUrl = session.mcp.url; console.log("Unione MCP URL:", composioMCPUrl); ``` ### 6. Configure Mastra MCP client and fetch tools What's happening: - MCPClient takes an id for this client and a list of MCP servers - The headers property includes the x-api-key for authentication - getTools fetches the tool definitions exposed by the Unione toolkit ```typescript const mcpClient = new MCPClient({ id: composioUserID as string, servers: { nasdaq: { url: new URL(composioMCPUrl), requestInit: { headers: session.mcp.headers, }, }, }, timeout: 30_000, }); console.log("Fetching MCP tools from Composio..."); const composioTools = await mcpClient.getTools(); console.log("Number of tools:", Object.keys(composioTools).length); ``` ### 7. Create the Mastra agent What's happening: - Agent is the core Mastra agent - name is just an identifier for logging and debugging - instructions guide the agent to use tools instead of only answering in natural language - model uses openai("gpt-5") to configure the underlying LLM ```typescript const agent = new Agent({ name: "unione-mastra-agent", instructions: "You are an AI agent with Unione tools via Composio.", model: "openai/gpt-5", }); ``` ### 8. Set up interactive chat interface What's happening: - messages keeps the full conversation history in Mastra's expected format - agent.generate runs the agent with conversation history and Unione toolsets - maxSteps limits how many tool calls the agent can take in a single run - onStepFinish is a hook that prints intermediate steps for debugging ```typescript let messages: AiMessageType[] = []; console.log("Chat started! Type 'exit' or 'quit' to end.\n"); const rl = readline.createInterface({ input: process.stdin, output: process.stdout, prompt: "> ", }); rl.prompt(); rl.on("line", async (userInput: string) => { const trimmedInput = userInput.trim(); if (["exit", "quit", "bye"].includes(trimmedInput.toLowerCase())) { console.log("\nGoodbye!"); rl.close(); process.exit(0); } if (!trimmedInput) { rl.prompt(); return; } messages.push({ id: crypto.randomUUID(), role: "user", content: trimmedInput, }); console.log("\nAgent is thinking...\n"); try { const response = await agent.generate(messages, { toolsets: { unione: composioTools, }, maxSteps: 8, }); const { text } = response; if (text && text.trim().length > 0) { console.log(`Agent: ${text}\n`); messages.push({ id: crypto.randomUUID(), role: "assistant", content: text, }); } } catch (error) { console.error("\nError:", error); } rl.prompt(); }); rl.on("close", async () => { console.log("\nSession ended."); await mcpClient.disconnect(); process.exit(0); }); } main().catch((err) => { console.error("Fatal error:", err); process.exit(1); }); ``` ## Complete Code ```typescript import "dotenv/config"; import { openai } from "@ai-sdk/openai"; import { Agent } from "@mastra/core/agent"; import { MCPClient } from "@mastra/mcp"; import { Composio } from "@composio/core"; import * as readline from "readline"; import type { AiMessageType } from "@mastra/core/agent"; const openaiAPIKey = process.env.OPENAI_API_KEY; const composioAPIKey = process.env.COMPOSIO_API_KEY; const composioUserID = process.env.COMPOSIO_USER_ID; if (!openaiAPIKey) throw new Error("OPENAI_API_KEY is not set"); if (!composioAPIKey) throw new Error("COMPOSIO_API_KEY is not set"); if (!composioUserID) throw new Error("COMPOSIO_USER_ID is not set"); const composio = new Composio({ apiKey: composioAPIKey as string }); async function main() { const session = await composio.create(composioUserID as string, { toolkits: ["unione"], }); const composioMCPUrl = session.mcp.url; const mcpClient = new MCPClient({ id: composioUserID as string, servers: { unione: { url: new URL(composioMCPUrl), requestInit: { headers: session.mcp.headers, }, }, }, timeout: 30_000, }); const composioTools = await mcpClient.getTools(); const agent = new Agent({ name: "unione-mastra-agent", instructions: "You are an AI agent with Unione tools via Composio.", model: "openai/gpt-5", }); let messages: AiMessageType[] = []; const rl = readline.createInterface({ input: process.stdin, output: process.stdout, prompt: "> ", }); rl.prompt(); rl.on("line", async (input: string) => { const trimmed = input.trim(); if (["exit", "quit"].includes(trimmed.toLowerCase())) { rl.close(); return; } messages.push({ id: crypto.randomUUID(), role: "user", content: trimmed }); const { text } = await agent.generate(messages, { toolsets: { unione: composioTools }, maxSteps: 8, }); if (text) { console.log(`Agent: ${text}\n`); messages.push({ id: crypto.randomUUID(), role: "assistant", content: text }); } rl.prompt(); }); rl.on("close", async () => { await mcpClient.disconnect(); process.exit(0); }); } main(); ``` ## Conclusion You've built a Mastra AI agent that can interact with Unione through Composio's Tool Router. You can extend this further by: - Adding other toolkits like Gmail, Slack, or GitHub - Building a web-based chat interface around this agent - Using multiple MCP endpoints to enable cross-app workflows ## How to build Unione MCP Agent with another framework - [OpenAI Agents SDK](https://composio.dev/toolkits/unione/framework/open-ai-agents-sdk) - [Claude Agent SDK](https://composio.dev/toolkits/unione/framework/claude-agents-sdk) - [Claude Code](https://composio.dev/toolkits/unione/framework/claude-code) - [Claude Cowork](https://composio.dev/toolkits/unione/framework/claude-cowork) - [Codex](https://composio.dev/toolkits/unione/framework/codex) - [OpenClaw](https://composio.dev/toolkits/unione/framework/openclaw) - [Hermes](https://composio.dev/toolkits/unione/framework/hermes-agent) - [CLI](https://composio.dev/toolkits/unione/framework/cli) - [Google ADK](https://composio.dev/toolkits/unione/framework/google-adk) - [LangChain](https://composio.dev/toolkits/unione/framework/langchain) - [Vercel AI SDK](https://composio.dev/toolkits/unione/framework/ai-sdk) - [LlamaIndex](https://composio.dev/toolkits/unione/framework/llama-index) - [CrewAI](https://composio.dev/toolkits/unione/framework/crew-ai) ## Related Toolkits - [Reddit](https://composio.dev/toolkits/reddit) - Reddit is a social news platform with thriving user-driven communities (subreddits). It's the go-to place for discussion, content sharing, and viral marketing. - [Facebook](https://composio.dev/toolkits/facebook) - Facebook is a social media and advertising platform for businesses and creators. It helps you connect, share, and manage content across your public Facebook Pages. - [Linkedin](https://composio.dev/toolkits/linkedin) - LinkedIn is a professional networking platform for connecting, sharing content, and engaging with business opportunities. It's the go-to place for building your professional brand and unlocking new career connections. - [Active campaign](https://composio.dev/toolkits/active_campaign) - ActiveCampaign is a marketing automation and CRM platform for managing email campaigns, sales pipelines, and customer segmentation. It helps businesses engage customers and drive growth through smart automation and targeted outreach. - [ActiveTrail](https://composio.dev/toolkits/active_trail) - ActiveTrail is a user-friendly email marketing and automation platform. It helps you reach subscribers and automate campaigns with ease. - [Ahrefs](https://composio.dev/toolkits/ahrefs) - Ahrefs is an SEO and marketing platform for site audits, keyword research, and competitor insights. It helps you improve search rankings and drive organic traffic. - [Amcards](https://composio.dev/toolkits/amcards) - AMCards lets you create and mail personalized greeting cards online. Build stronger customer relationships with easy, automated card campaigns. - [Beamer](https://composio.dev/toolkits/beamer) - Beamer is a news and changelog platform for in-app announcements and feature updates. It helps companies boost user engagement by sharing news where users are most active. - [Benchmark email](https://composio.dev/toolkits/benchmark_email) - Benchmark Email is a platform for creating, sending, and tracking email campaigns. It's built to help you engage audiences and analyze results—all in one place. - [Bigmailer](https://composio.dev/toolkits/bigmailer) - BigMailer is an email marketing platform for managing multiple brands with white-labeling and automation. It helps teams streamline campaigns and simplify integration with Amazon SES. - [Brandfetch](https://composio.dev/toolkits/brandfetch) - Brandfetch is an API that delivers company logos, colors, and visual branding assets. It helps marketers and developers keep brand visuals consistent everywhere. - [Brevo](https://composio.dev/toolkits/brevo) - Brevo is an all-in-one email and SMS marketing platform for transactional messaging, automation, and CRM. It helps businesses engage customers and streamline communications through powerful campaign tools. - [Campayn](https://composio.dev/toolkits/campayn) - Campayn is an email marketing platform for creating, sending, and managing campaigns. It helps businesses engage contacts and grow audiences with easy-to-use tools. - [Cardly](https://composio.dev/toolkits/cardly) - Cardly is a platform for creating and sending personalized direct mail to customers. It helps businesses break through the digital clutter by getting real engagement via physical mailboxes. - [ClickSend](https://composio.dev/toolkits/clicksend) - ClickSend is a cloud-based SMS and email marketing platform for businesses. It streamlines communication by enabling quick message delivery and contact management. - [Crustdata](https://composio.dev/toolkits/crustdata) - CrustData is an AI-powered data intelligence platform for real-time company and people data. It helps B2B sales teams, AI SDRs, and investors react to live business signals. - [Curated](https://composio.dev/toolkits/curated) - Curated is a platform for collecting, curating, and publishing newsletters. It streamlines content aggregation and distribution for creators and teams. - [Customerio](https://composio.dev/toolkits/customerio) - Customer.io is a customer engagement platform for targeted messaging across email, SMS, and push. Easily automate, segment, and track communications with your audience. - [Cutt ly](https://composio.dev/toolkits/cutt_ly) - Cutt.ly is a URL shortening service for managing and analyzing links. Streamline your workflows with quick, trackable, and branded short URLs. - [Demio](https://composio.dev/toolkits/demio) - Demio is webinar software built for marketers, offering both live and automated sessions with interactive features. It helps teams engage audiences and optimize lead generation through detailed analytics. ## Frequently Asked Questions ### What are the differences in Tool Router MCP and Unione MCP? With a standalone Unione MCP server, the agents and LLMs can only access a fixed set of Unione tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Unione and many other apps based on the task at hand, all through a single MCP endpoint. ### Can I use Tool Router MCP with Mastra AI? Yes, you can. Mastra 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 Unione tools. ### Can I manage the permissions and scopes for Unione while using Tool Router? Yes, absolutely. You can configure which Unione 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 Unione data and credentials are handled as safely as possible. --- [See all toolkits](https://composio.dev/toolkits) · [Composio docs](https://docs.composio.dev/llms.txt)