# How to integrate Findymail MCP with Mastra AI ```json { "title": "How to integrate Findymail MCP with Mastra AI", "toolkit": "Findymail", "toolkit_slug": "findymail", "framework": "Mastra AI", "framework_slug": "mastra-ai", "url": "https://composio.dev/toolkits/findymail/framework/mastra-ai", "markdown_url": "https://composio.dev/toolkits/findymail/framework/mastra-ai.md", "updated_at": "2026-05-12T10:11:28.700Z" } ``` ## Introduction This guide walks you through connecting Findymail to Mastra AI using the Composio tool router. By the end, you'll have a working Findymail agent that can find verified email for john at acme.com, create a new contact list for leads, verify deliverability of this email address through natural language commands. This guide will help you understand how to give your Mastra AI agent real control over a Findymail account through Composio's Findymail MCP server. Before we dive in, let's take a quick look at the key ideas and tools involved. ## Also integrate Findymail with - [OpenAI Agents SDK](https://composio.dev/toolkits/findymail/framework/open-ai-agents-sdk) - [Claude Agent SDK](https://composio.dev/toolkits/findymail/framework/claude-agents-sdk) - [Claude Code](https://composio.dev/toolkits/findymail/framework/claude-code) - [Claude Cowork](https://composio.dev/toolkits/findymail/framework/claude-cowork) - [Codex](https://composio.dev/toolkits/findymail/framework/codex) - [OpenClaw](https://composio.dev/toolkits/findymail/framework/openclaw) - [Hermes](https://composio.dev/toolkits/findymail/framework/hermes-agent) - [CLI](https://composio.dev/toolkits/findymail/framework/cli) - [Google ADK](https://composio.dev/toolkits/findymail/framework/google-adk) - [LangChain](https://composio.dev/toolkits/findymail/framework/langchain) - [Vercel AI SDK](https://composio.dev/toolkits/findymail/framework/ai-sdk) - [LlamaIndex](https://composio.dev/toolkits/findymail/framework/llama-index) - [CrewAI](https://composio.dev/toolkits/findymail/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 Findymail tools - Connect Mastra's MCP client to the Composio generated MCP URL - Fetch Findymail 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 Findymail 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 Findymail MCP server, and what's possible with it? The Findymail MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Findymail account. It provides structured and secure access to verified B2B contact data, so your agent can create and manage contact lists, find and verify emails, and streamline your outreach workflow automatically. - Automated contact list management: Let your agent create new contact lists, fetch all your lists, or delete lists as your prospecting needs change. - Precise contact discovery: Ask your agent to find and retrieve emails for prospects based on full name and company domain, making it easier to build targeted outreach campaigns. - Bulk contact retrieval: Direct your agent to list all contacts within a specific list, enabling quick access to leads for export or follow-up. - Email deliverability verification: Have your agent check if an email address is valid and safe to use before sending that crucial first message. - Seamless CRM enrichment: Use verified contact details to automatically enrich your CRM, helping you keep data accurate and actionable for your sales team. ## Supported Tools | Tool slug | Name | Description | |---|---|---| | `FINDYMAIL_ADD_EXCLUDED_DOMAIN` | Add Excluded Domain | Tool to add domains to an exclusion list in Findymail. Use when you need to prevent email searches or verification for specific domains. | | `FINDYMAIL_CREATE_EXCLUSION_LIST` | Create Exclusion List | Tool to create a new exclusion list for Intellimatch searches. Use when you need to filter out specific companies or contacts from search results. | | `FINDYMAIL_CREATE_LIST` | Create Contact List | Tool to create a new contact list. Use when you need to organize contacts into a named list before adding them. | | `FINDYMAIL_DELETE_EXCLUSION_LIST` | Delete Exclusion List | Tool to permanently delete an exclusion list by its ID. Use when you need to remove an exclusion list from Intellimatch. This action is irreversible. | | `FINDYMAIL_DELETE_LIST` | Delete Contact List | Permanently deletes a contact list by its ID. This action is irreversible and will also remove all contacts in the list. Returns 404 if the list does not exist. | | `FINDYMAIL_FIND_EMAIL_BY_NAME` | Find Email by Name | Tool to find someone's email using their full name and company domain. Use when you have a person's name and domain and need their email address. Supports asynchronous search via webhook_url. | | `FINDYMAIL_GET_CONTACT_LISTS` | Get Contact Lists | Tool to retrieve all contact lists. Use when you need an overview of your existing Findymail lists. | | `FINDYMAIL_GET_CREDITS` | Get Credits | Tool to check available API credits for your Findymail account. Use when you need to verify remaining credits before performing operations. | | `FINDYMAIL_GET_CREDITS_SUMMARY` | Get Credits Summary | Tool to retrieve credits usage summary report for the authenticated account. Use when you need to check credits consumption over time. | | `FINDYMAIL_GET_CREDITS_TEAM_SUMMARY` | Get Credits Team Summary | Tool to retrieve team credits usage summary report. Use when you need an overview of credit consumption across team members. | | `FINDYMAIL_GET_EXCLUSION_LIST` | Get Exclusion List | Tool to retrieve a specific exclusion list by ID. Use when you need details about a particular exclusion list. | | `FINDYMAIL_GET_INTELLIMATCH_DATA` | Get Intellimatch Data | Tool to retrieve data from an Intellimatch search. Use after initiating a search with POST /api/intellimatch/search and confirming completion with GET /api/intellimatch/status. | | `FINDYMAIL_GET_INTELLIMATCH_STATUS` | Get Intellimatch Status | Tool to check the status of an Intellimatch search job. Use when you need to verify if an Intellimatch search has completed after initiating it. | | `FINDYMAIL_LIST_CONTACTS` | List Contacts | Tool to retrieve contacts from a specified list (paginated). Use after selecting a list to fetch its contacts. | | `FINDYMAIL_LIST_EXCLUDED_DOMAINS` | List Excluded Domains | Tool to retrieve domains excluded from Intellimatch searches. Use when you need to view the current domain exclusion list. | | `FINDYMAIL_LIST_EXCLUSION_LISTS` | List Exclusion Lists | Tool to retrieve all exclusion lists for managing excluded websites from Intellimatch searches. Use when you need to view configured website exclusions. | | `FINDYMAIL_REMOVE_EXCLUDED_DOMAIN` | Remove Excluded Domain | Tool to remove domains from the exclusion list. Use when you need to stop excluding specific domains from email search results. | | `FINDYMAIL_SEARCH_INTELLIMATCH` | Search Intellimatch | Tool to find companies and contacts using natural language queries. Use when you need to build targeted lead lists automatically by describing your ideal customer profile in plain language. | | `FINDYMAIL_UPDATE_EXCLUSION_LIST` | Update Exclusion List | Tool to update an existing exclusion list. Use when you need to rename or modify an exclusion list's properties. | | `FINDYMAIL_UPDATE_LIST` | Update Contact List | Tool to update an existing contact list. Use when you need to rename a list or change its sharing settings. | | `FINDYMAIL_VERIFY_EMAIL` | Verify Email | Tool to verify the deliverability of an email address. Use when you need to confirm an email can receive messages before outreach. | ## Supported Triggers None listed. ## Creating MCP Server - Stand-alone vs Composio SDK The Findymail MCP server is an implementation of the Model Context Protocol that connects your AI agent to Findymail. It provides structured and secure access so your agent can perform Findymail 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 Findymail 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 Findymail What's happening: - create spins up a short-lived MCP HTTP endpoint for this user - The toolkits array contains "findymail" for Findymail 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: ["findymail"], }, ); const composioMCPUrl = session.mcp.url; console.log("Findymail 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 Findymail 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: "findymail-mastra-agent", instructions: "You are an AI agent with Findymail 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 Findymail 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: { findymail: 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: ["findymail"], }); const composioMCPUrl = session.mcp.url; const mcpClient = new MCPClient({ id: composioUserID as string, servers: { findymail: { url: new URL(composioMCPUrl), requestInit: { headers: session.mcp.headers, }, }, }, timeout: 30_000, }); const composioTools = await mcpClient.getTools(); const agent = new Agent({ name: "findymail-mastra-agent", instructions: "You are an AI agent with Findymail 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: { findymail: 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 Findymail 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 Findymail MCP Agent with another framework - [OpenAI Agents SDK](https://composio.dev/toolkits/findymail/framework/open-ai-agents-sdk) - [Claude Agent SDK](https://composio.dev/toolkits/findymail/framework/claude-agents-sdk) - [Claude Code](https://composio.dev/toolkits/findymail/framework/claude-code) - [Claude Cowork](https://composio.dev/toolkits/findymail/framework/claude-cowork) - [Codex](https://composio.dev/toolkits/findymail/framework/codex) - [OpenClaw](https://composio.dev/toolkits/findymail/framework/openclaw) - [Hermes](https://composio.dev/toolkits/findymail/framework/hermes-agent) - [CLI](https://composio.dev/toolkits/findymail/framework/cli) - [Google ADK](https://composio.dev/toolkits/findymail/framework/google-adk) - [LangChain](https://composio.dev/toolkits/findymail/framework/langchain) - [Vercel AI SDK](https://composio.dev/toolkits/findymail/framework/ai-sdk) - [LlamaIndex](https://composio.dev/toolkits/findymail/framework/llama-index) - [CrewAI](https://composio.dev/toolkits/findymail/framework/crew-ai) ## Related Toolkits - [Aeroleads](https://composio.dev/toolkits/aeroleads) - Aeroleads is a B2B lead generation platform for finding business emails and phone numbers. Grow your sales pipeline faster with powerful prospecting tools. - [Autobound](https://composio.dev/toolkits/autobound) - Autobound is an AI-powered sales engagement platform that crafts hyper-personalized outreach and insights. It helps sales teams boost response rates and close more deals through tailored content and recommendations. - [Better proposals](https://composio.dev/toolkits/better_proposals) - Better Proposals is a web-based tool for crafting and sending professional proposals. It helps teams impress clients and close deals faster with slick, easy-to-use templates. - [Bidsketch](https://composio.dev/toolkits/bidsketch) - Bidsketch is a proposal software that helps businesses create professional proposals quickly and efficiently. It streamlines the proposal process, saving time while boosting client win rates. - [Bolna](https://composio.dev/toolkits/bolna) - Bolna is an AI platform for building conversational voice agents. It helps businesses automate support and streamline interactions through natural, voice-powered conversations. - [Botsonic](https://composio.dev/toolkits/botsonic) - Botsonic is a no-code AI chatbot builder for easily creating and deploying chatbots to your website. It empowers businesses to offer conversational experiences without writing code. - [Botstar](https://composio.dev/toolkits/botstar) - BotStar is a comprehensive chatbot platform for designing, developing, and training chatbots visually on Messenger and websites. It helps businesses automate conversations and customer interactions without coding. - [Callerapi](https://composio.dev/toolkits/callerapi) - CallerAPI is a white-label caller identification platform for branded caller ID and fraud prevention. It helps businesses boost customer trust while stopping spam, fraud, and robocalls. - [Callingly](https://composio.dev/toolkits/callingly) - Callingly is a lead response management platform that automates immediate call and text follow-ups with new leads. It helps sales teams boost response speed and close more deals by connecting seamlessly with CRMs and lead sources. - [Callpage](https://composio.dev/toolkits/callpage) - Callpage is a lead capture platform that lets businesses instantly connect with website visitors via callback. It boosts lead generation and increases your sales conversion rates. - [Clearout](https://composio.dev/toolkits/clearout) - Clearout is an AI-powered service for verifying, finding, and enriching email addresses. It boosts deliverability and helps you discover high-quality leads effortlessly. - [Clientary](https://composio.dev/toolkits/clientary) - Clientary is a platform for managing clients, invoices, projects, proposals, and more. It streamlines client work and saves you serious admin time. - [Convolo ai](https://composio.dev/toolkits/convolo_ai) - Convolo ai is an AI-powered communications platform for sales teams. It accelerates lead response and improves conversion rates by automating calls and integrating workflows. - [Delighted](https://composio.dev/toolkits/delighted) - Delighted is a customer feedback platform based on the Net Promoter System®. It helps you quickly gather, track, and act on customer sentiment. - [Docsbot ai](https://composio.dev/toolkits/docsbot_ai) - Docsbot ai is a platform that lets you build custom AI chatbots trained on your documentation. It automates customer support and content generation, saving time and improving response quality. - [Emelia](https://composio.dev/toolkits/emelia) - Emelia is an all-in-one B2B prospecting platform for cold-email, LinkedIn outreach, and prospect research. It streamlines outbound campaigns so you can find, engage, and warm up leads faster. - [Freshdesk](https://composio.dev/toolkits/freshdesk) - Freshdesk is customer support software with ticketing and automation tools. It helps teams streamline helpdesk operations for faster, better customer support. - [Fullenrich](https://composio.dev/toolkits/fullenrich) - FullEnrich is a B2B contact enrichment platform that aggregates emails and phone numbers from 15+ data vendors. Instantly find and verify lead contact data to boost your outreach. - [Gatherup](https://composio.dev/toolkits/gatherup) - GatherUp is a customer feedback and online review management platform. It helps businesses boost their reputation by streamlining how they collect and manage customer feedback. - [Getprospect](https://composio.dev/toolkits/getprospect) - Getprospect is a business email discovery tool with LinkedIn integration. Use it to quickly find and verify professional email addresses. ## Frequently Asked Questions ### What are the differences in Tool Router MCP and Findymail MCP? With a standalone Findymail MCP server, the agents and LLMs can only access a fixed set of Findymail tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Findymail 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 Findymail tools. ### Can I manage the permissions and scopes for Findymail while using Tool Router? Yes, absolutely. You can configure which Findymail 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 Findymail data and credentials are handled as safely as possible. --- [See all toolkits](https://composio.dev/toolkits) · [Composio docs](https://docs.composio.dev/llms.txt)