How to integrate Follow Up Boss MCP with Mastra AI

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Introduction

This guide walks you through connecting Follow Up Boss to Mastra AI using the Composio tool router. By the end, you'll have a working Follow Up Boss agent that can list all leads added this week, update contact info for lead john doe, create a new deal for jane smith through natural language commands.

This guide will help you understand how to give your Mastra AI agent real control over a Follow Up Boss account through Composio's Follow Up Boss MCP server.

Before we dive in, let's take a quick look at the key ideas and tools involved.

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 Follow Up Boss tools
  • Connect Mastra's MCP client to the Composio generated MCP URL
  • Fetch Follow Up Boss 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 Follow Up Boss 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 Follow Up Boss MCP server, and what's possible with it?

The Follow Up Boss MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Follow Up Boss account. It provides structured and secure access so your agent can perform Follow Up Boss operations on your behalf.

Supported Tools & Triggers

Tools
Apply Action Plan to PersonTool to apply an Action Plan to a person in Follow Up Boss.
Create AppointmentTool to create a new appointment in Follow Up Boss.
Create appointment outcomeTool to create an appointment outcome in Follow Up Boss.
Create Appointment TypeTool to create a new appointment type in Follow Up Boss.
Create CallTool to add a call record to Follow Up Boss.
Create Custom FieldTool to create a custom field in Follow Up Boss.
Create Deal Custom FieldTool to create a custom field for deals in Follow Up Boss.
Create DealTool to create a new deal in Follow Up Boss.
Create Email Marketing CampaignTool to create an email marketing campaign in Follow Up Boss.
Create Email Marketing EventsTool to notify Follow Up Boss about marketing emails sent, opens, clicks, bounces, unsubscribes and spam reports.
Create EventsTool to send in a lead or an event related to a lead in Follow Up Boss.
Create GroupTool to create a new Follow Up Boss group with specified members and distribution settings.
Create PipelineTool to create a new pipeline in Follow Up Boss.
Create PondsTool to create a new pond in Follow Up Boss.
Create ReactionsTool to add a reaction (emoji) to a Note, Call, or ThreadedReply.
Create StageTool to create a new stage in Follow Up Boss.
Create TeamTool to create a new team in Follow Up Boss.
Create email templateTool to create a new email template in Follow Up Boss.
Create Text Message TemplateTool to create a text message template in Follow Up Boss.
Delete AppointmentTool to delete an appointment by ID.
Delete Appointment OutcomeTool to delete an appointment outcome by ID.
Delete Appointment TypeTool to delete an appointment type by its ID.
Delete Custom FieldTool to delete a custom field by its ID.
Delete DealTool to delete a deal by its ID.
Delete Deal Custom FieldTool to delete a deal custom field by ID.
Delete GroupTool to delete a group by its ID.
Delete People RelationshipTool to delete a people relationship by ID in Follow Up Boss.
Delete PipelineTool to delete a pipeline by its ID from Follow Up Boss.
Delete PondTool to delete a pond by its ID.
Delete StageTool to delete a Follow Up Boss stage by ID.
Delete TeamTool to delete a team by its ID.
Delete text message templateTool to delete a text message template by ID.
Get AppointmentTool to retrieve an appointment by its ID.
Get Appointment OutcomeTool to retrieve an appointment outcome by ID.
Get Appointment TypeTool to retrieve an appointment type by ID.
Get CallTool to retrieve a call by its ID from Follow Up Boss.
Get DealTool to retrieve a deal by its ID from Follow Up Boss.
Get Deal Custom FieldTool to retrieve a deal custom field by its ID from Follow Up Boss.
Get EventTool to retrieve a single event by its ID from Follow Up Boss.
Get GroupTool to retrieve a group by its ID from Follow Up Boss.
Get IdentityTool to retrieve identity and authentication information from Follow Up Boss.
Get MeTool to retrieve information about the currently authenticated user.
Get People RelationshipTool to retrieve a people relationship by its ID from Follow Up Boss.
Get PipelineTool to retrieve a pipeline by its ID from Follow Up Boss.
Get PondsTool to retrieve a pond by its ID from Follow Up Boss.
Get Smart ListTool to retrieve a Smart List by its ID from Follow Up Boss.
Get StageTool to retrieve a stage by its ID from Follow Up Boss.
Get TeamTool to retrieve a team by its ID from Follow Up Boss.
Get TemplateTool to retrieve an email template by its ID from Follow Up Boss.
Get Text MessageTool to retrieve a text message by its ID from Follow Up Boss.
Get Text Message TemplateTool to retrieve a text message template by its ID from Follow Up Boss.
Get UserTool to retrieve a user by its ID from Follow Up Boss.
List Action PlansTool to get a list of Action Plans from Follow Up Boss.
List Action Plans PeopleTool to list Action Plans applied to a particular person or list people on a particular Action Plan.
List Appointment OutcomesTool to list all appointment outcomes from Follow Up Boss.
List AppointmentsTool to search for appointments in Follow Up Boss.
List Appointment TypesTool to list all appointment types from Follow Up Boss.
List CallsTool to search for calls in Follow Up Boss.
List Custom FieldsTool to list all custom fields in Follow Up Boss.
List Deal Custom FieldsTool to list all deal custom fields in Follow Up Boss.
List DealsTool to search for and list deals from Follow Up Boss.
List Email Marketing CampaignsTool to list email marketing campaigns from Follow Up Boss.
List Email Marketing EventsTool to retrieve email marketing events from Follow Up Boss.
List EventsTool to search for and list events from Follow Up Boss.
List GroupsTool to list all groups from Follow Up Boss.
List Groups Round RobinTool to list groups with round-robin data from Follow Up Boss.
List Inbox AppsTool to list all inbox app installations from Follow Up Boss.
List People RelationshipsTool to list all people relationships from Follow Up Boss.
List PipelinesTool to search for pipelines in Follow Up Boss.
List PondsTool to list all ponds from Follow Up Boss.
List Smart ListsTool to list Smart Lists from Follow Up Boss.
List StagesTool to retrieve a list of stages from Follow Up Boss.
List Team InboxesTool to list all shared team inboxes from Follow Up Boss.
List TeamsTool to get a list of teams from Follow Up Boss.
List TemplatesTool to list all email templates from Follow Up Boss.
List Text MessagesTool to list text messages for a person or phone number from Follow Up Boss.
List Text Message TemplatesTool to list all text message templates from Follow Up Boss.
List TimeframesTool to get a list of timeframes from Follow Up Boss.
List UsersTool to search for and list users from Follow Up Boss.
List WebhooksTool to retrieve a list of webhooks from Follow Up Boss.
Merge TemplateTool to merge an email template with person data using Follow Up Boss API.
Merge Text Message TemplateTool to merge a text message template with person data.
Update Action Plan People StatusTool to update the status of an Action Plan to Person relationship in Follow Up Boss.
Update AppointmentTool to update an existing appointment in Follow Up Boss.
Update appointment outcomeTool to update an existing appointment outcome in Follow Up Boss.
Update Appointment TypeTool to update an existing appointment type in Follow Up Boss.
Update CallTool to update an existing call record in Follow Up Boss.
Update Custom FieldsTool to update an existing custom field in Follow Up Boss by its ID.
Update Deal Custom FieldsTool to update an existing deal custom field in Follow Up Boss.
Update DealTool to update an existing deal in Follow Up Boss.
Update Email Marketing CampaignTool to update an existing email marketing campaign in Follow Up Boss.
Update GroupTool to update an existing Follow Up Boss group with modified members and distribution settings.
Update People RelationshipsTool to update details of a specific people relationship in Follow Up Boss.
Update PipelineTool to update an existing pipeline in Follow Up Boss.
Update PondsTool to update an existing pond in Follow Up Boss.
Update StageTool to update an existing stage in Follow Up Boss.
Update TeamTool to update an existing team in Follow Up Boss.
Update email templateTool to update an existing email template in Follow Up Boss.
Update Text Message TemplateTool to update an existing text message template in Follow Up Boss.

What is the Composio tool router, and how does it fit here?

What is Tool Router?

Composio's Tool Router helps agents find the right tools for a task at runtime. You can plug in multiple toolkits (like Gmail, HubSpot, and GitHub), and the agent will identify the relevant app and action to complete multi-step workflows. This can reduce token usage and improve the reliability of tool calls. Read more here: Getting started with Tool Router

The tool router generates a secure MCP URL that your agents can access to perform actions.

How the Tool Router works

The Tool Router follows a three-phase workflow:

  1. Discovery: Searches for tools matching your task and returns relevant toolkits with their details.
  2. Authentication: Checks for active connections. If missing, creates an auth config and returns a connection URL via Auth Link.
  3. Execution: Executes the action using the authenticated connection.

Step-by-step Guide

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

Getting API Keys for OpenAI and Composio

OpenAI API Key
  • Go to the OpenAI dashboard 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.
  • Go to Settings and copy your API key.
  • This key lets your Mastra agent talk to Composio and reach Follow Up Boss through MCP.

Install dependencies

bash
npm install @composio/core @mastra/core @mastra/mcp @ai-sdk/openai dotenv

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

Set up environment variables

bash
COMPOSIO_API_KEY=your_composio_api_key_here
COMPOSIO_USER_ID=your_user_id_here
OPENAI_API_KEY=your_openai_api_key_here

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

Import libraries and validate environment

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,
});
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

Create a Tool Router session for Follow Up Boss

typescript
async function main() {
  const session = await composio.create(
    composioUserID as string,
    {
      toolkits: ["follow_up_boss"],
    },
  );

  const composioMCPUrl = session.mcp.url;
  console.log("Follow Up Boss MCP URL:", composioMCPUrl);
What's happening:
  • create spins up a short-lived MCP HTTP endpoint for this user
  • The toolkits array contains "follow_up_boss" for Follow Up Boss access
  • session.mcp.url is the MCP URL that Mastra's MCPClient will connect to

Configure Mastra MCP client and fetch tools

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);
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 Follow Up Boss toolkit

Create the Mastra agent

typescript
const agent = new Agent({
    name: "follow_up_boss-mastra-agent",
    instructions: "You are an AI agent with Follow Up Boss tools via Composio.",
    model: "openai/gpt-5",
  });
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

Set up interactive chat interface

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: {
        follow_up_boss: 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);
});
What's happening:
  • messages keeps the full conversation history in Mastra's expected format
  • agent.generate runs the agent with conversation history and Follow Up Boss 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

Complete Code

Here's the complete code to get you started with Follow Up Boss and Mastra AI:

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: ["follow_up_boss"],
  });

  const composioMCPUrl = session.mcp.url;

  const mcpClient = new MCPClient({
    id: composioUserID as string,
    servers: {
      follow_up_boss: {
        url: new URL(composioMCPUrl),
        requestInit: {
          headers: session.mcp.headers,
        },
      },
    },
    timeout: 30_000,
  });

  const composioTools = await mcpClient.getTools();

  const agent = new Agent({
    name: "follow_up_boss-mastra-agent",
    instructions: "You are an AI agent with Follow Up Boss 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: { follow_up_boss: 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 Follow Up Boss 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 Follow Up Boss MCP Agent with another framework

OpenAI Agents SDK

OpenAI Agents SDK

Use Follow Up Boss MCP with OpenAI Agents SDK

Claude Agent SDK

Claude Agent SDK

Use Follow Up Boss MCP with Claude Agent SDK

Google ADK

Google ADK

Use Follow Up Boss MCP with Google ADK

LangChain

LangChain

Use Follow Up Boss MCP with LangChain

Vercel AI SDK

Vercel AI SDK

Use Follow Up Boss MCP with Vercel AI SDK

LlamaIndex

LlamaIndex

Use Follow Up Boss MCP with LlamaIndex

CrewAI

CrewAI

Use Follow Up Boss MCP with CrewAI

Claude Code

Claude Code

Use Follow Up Boss MCP with Claude Code

Codex

Codex

Use Follow Up Boss MCP with Codex

FAQ

What are the differences in Tool Router MCP and Follow Up Boss MCP?

With a standalone Follow Up Boss MCP server, the agents and LLMs can only access a fixed set of Follow Up Boss tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Follow Up Boss 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 Follow Up Boss tools.

Can I manage the permissions and scopes for Follow Up Boss while using Tool Router?

Yes, absolutely. You can configure which Follow Up Boss 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 Follow Up Boss data and credentials are handled as safely as possible.

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