How to integrate Amplitude MCP with Mastra AI

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Introduction

This guide walks you through connecting Amplitude to Mastra AI using the Composio tool router. By the end, you'll have a working Amplitude agent that can get daily active users for last month, generate funnel analysis for onboarding flow, list top events for premium users through natural language commands.

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

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

Also integrate Amplitude with

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

The Amplitude MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Amplitude account. It provides structured and secure access to your analytics platform, so your agent can perform actions like managing event types, organizing cohorts, updating user properties, and tracking event categories on your behalf.

  • Cohort and user management: Ask your agent to request, download, and check the status of specific user cohorts for advanced segmentation or analysis.
  • Event type and category administration: Effortlessly create, update, or delete event types and categories, keeping your analytics taxonomy organized and up to date.
  • User property updates: Direct your agent to set or modify user properties—like device information or location—without sending new events, making user profile management a breeze.
  • Comprehensive analytics lookup: Retrieve detailed information about event types and categories, enabling your agent to provide insights or answer analytics questions in real time.

Supported Tools & Triggers

Tools
Bulk Assign Annotations to CategoryTool to bulk assign multiple annotations to a category in Amplitude.
Cancel User DeletionCancel a pending user deletion request in Amplitude.
Check Amplitude Cohort StatusCheck the status of a cohort export request.
Create Chart Annotation in AmplitudeCreate a chart annotation in Amplitude to mark important dates.
Create Annotation CategoryTool to create an annotation category in Amplitude to organize annotations.
Create Amplitude Event CategoryCreate a new event category in Amplitude.
Create Amplitude Event TypeCreate a new event type in Amplitude.
Create Amplitude ReleaseCreate a release to document product changes.
Delete Amplitude Chart AnnotationDelete a chart annotation from Amplitude.
Delete Amplitude Annotation CategoryDelete an annotation category from Amplitude.
Delete Amplitude Event CategoryDelete an event category from Amplitude.
Delete Amplitude Event TypeDelete an event type from Amplitude.
Delete Amplitude UsersSubmit user deletion requests for GDPR/CCPA compliance.
Download Amplitude Cohort FileDownload the cohort file after request is complete.
Search Amplitude UserSearch for users in Amplitude by canonical identifier (Amplitude ID, device ID, user ID, or user ID prefix).
Get Active or New UsersGet the number of active or new users for a date range with optional segmentation.
Get Amplitude AnnotationGet a single chart annotation by ID from Amplitude.
Get Amplitude Annotation CategoryGet a single annotation category by ID from Amplitude.
Request Amplitude CohortGet a single cohort by ID and initiate download.
Get User Deletion RequestsGet the status of user deletion requests within a date range.
Get Amplitude Event CategoriesGet event categories from Amplitude.
Get Amplitude Event PropertyGet a specific event property from Amplitude taxonomy.
Get Event Segmentation DataGet event segmentation data from Amplitude Analytics API.
Get Amplitude Event TypeGet a specific event type from Amplitude by name.
Get Amplitude Event TypesGet all event types from Amplitude.
Get Funnel Analysis DataGet funnel analysis data showing user conversion through a sequence of events.
Get Real-time Active UsersGet real-time active users count from Amplitude.
Get User Retention AnalysisGet user retention analysis showing how users return over time after a starting action.
Get Revenue LTV MetricsGet revenue lifetime value (LTV) metrics including ARPU, ARPPU, and total revenue.
Get Session Average LengthGet average session length (in seconds) for a specified date range from Amplitude.
Get Session Length DistributionTool to retrieve session length distribution data for a specified date range from Amplitude.
Get Sessions Per User from AmplitudeTool to get average number of sessions per user for each day in a date range from Amplitude.
Get User Activity from AmplitudeFetch a single user's profile summary and event stream by Amplitude ID.
Get User Composition by PropertyTool to get user composition breakdown by property (platform, version, country, etc.
Get User MappingsGet the list of user mappings for provided user IDs.
Get Amplitude User PropertyGet a specific user property from Amplitude taxonomy.
Update User Properties in AmplitudeUpdate user properties using Amplitude's Identify API.
List Amplitude Annotation CategoriesList all annotation categories from Amplitude.
List Chart AnnotationsTool to get all chart annotations with optional filtering by category, chart, and date range.
List Amplitude CohortsList all discoverable cohorts for an Amplitude project.
List Amplitude Event PropertiesGet all event properties from Amplitude, optionally filtered by event type or property name.
List Amplitude EventsTool to get a list of all event types in your Amplitude project with current week's statistics.
List Amplitude User PropertiesTool to get all user properties in your Amplitude project.
Map Users in AmplitudeMap users with different user IDs together (alias/merge users) in Amplitude.
Restore Amplitude Event TypeRestore a deleted event type in Amplitude.
Send Events to AmplitudeSend events to Amplitude using the HTTP V2 API.
Set Group Properties in AmplitudeSet group properties for account-level reporting without sending an event.
Update Amplitude Chart AnnotationTool to update an existing chart annotation in Amplitude.
Update Amplitude Annotation CategoryTool to update an annotation category in Amplitude.
Update Amplitude Cohort MembershipIncrementally update cohort membership by adding or removing IDs.
Update Amplitude Event CategoryUpdate an existing event category in Amplitude.
Update Amplitude Event TypeUpdate an existing event type in Amplitude.
Batch Upload Events to AmplitudeBulk upload events to Amplitude using the Batch Event Upload API.
Upload Amplitude CohortGenerate a new cohort or update an existing cohort by uploading user IDs or Amplitude IDs.

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

What is Composio SDK?

Composio's Composio SDK 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 Composio SDK

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

How the Composio SDK works

The Composio SDK 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 Amplitude 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 Amplitude

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

  const composioMCPUrl = session.mcp.url;
  console.log("Amplitude MCP URL:", composioMCPUrl);
What's happening:
  • create spins up a short-lived MCP HTTP endpoint for this user
  • The toolkits array contains "amplitude" for Amplitude 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 Amplitude toolkit

Create the Mastra agent

typescript
const agent = new Agent({
    name: "amplitude-mastra-agent",
    instructions: "You are an AI agent with Amplitude 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: {
        amplitude: 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 Amplitude 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 Amplitude 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: ["amplitude"],
  });

  const composioMCPUrl = session.mcp.url;

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

  const composioTools = await mcpClient.getTools();

  const agent = new Agent({
    name: "amplitude-mastra-agent",
    instructions: "You are an AI agent with Amplitude 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: { amplitude: 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 Amplitude 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

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FAQ

What are the differences in Tool Router MCP and Amplitude MCP?

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

Can I manage the permissions and scopes for Amplitude while using Tool Router?

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

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