How to integrate Google Sheets MCP with Mastra AI

This guide walks you through connecting Google Sheets to Mastra AI using the Composio tool router. By the end, you'll have a working Google Sheets agent that can add a new sheet named 'q3 sales', update all rows where status is 'pending', create a pie chart of expenses by category through natural language commands. This guide will help you understand how to give your Mastra AI agent real control over a Google Sheets account through Composio's Google Sheets MCP server. Before we dive in, let's take a quick look at the key ideas and tools involved.

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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.

42 Tools16 Triggers

Introduction

This guide walks you through connecting Google Sheets to Mastra AI using the Composio tool router. By the end, you'll have a working Google Sheets agent that can add a new sheet named 'q3 sales', update all rows where status is 'pending', create a pie chart of expenses by category through natural language commands.

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

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

Also integrate Google Sheets with

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

The Google Sheets MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Google Sheets account. It provides structured and secure access to your spreadsheets, so your agent can perform actions like creating new sheets, updating data, generating charts, and automating spreadsheet workflows on your behalf.

  • Spreadsheet creation and management: Instantly create new Google Sheets and add new worksheets (tabs) to existing spreadsheets whenever you need extra space or organization.
  • Bulk data reading and updating: Retrieve specific data ranges, aggregate column data, or update multiple rows and cells at once—perfect for reporting or syncing external data.
  • Automated chart generation: Direct your agent to build charts from selected data, making visualization and analysis faster and easier right inside your sheets.
  • Smart filtering and data cleanup: Have the agent clear filters, remove cell contents, or append rows and columns to keep your sheets tidy and up to date.
  • Dynamic data manipulation: Use advanced features like batch updates with data filters and aggregate operations to transform, filter, or summarize spreadsheet data efficiently.

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

Step by step09 STEPS
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
2

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 Google Sheets through MCP.
3

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
4

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
5

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
6

Create a Tool Router session for Google Sheets

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

  const composioMCPUrl = session.mcp.url;
  console.log("Google Sheets MCP URL:", composioMCPUrl);
What's happening:
  • create spins up a short-lived MCP HTTP endpoint for this user
  • The toolkits array contains "googlesheets" for Google Sheets access
  • session.mcp.url is the MCP URL that Mastra's MCPClient will connect to
7

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 Google Sheets toolkit
8

Create the Mastra agent

typescript
const agent = new Agent({
    name: "googlesheets-mastra-agent",
    instructions: "You are an AI agent with Google Sheets 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
9

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: {
        googlesheets: 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 Google Sheets 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 Google Sheets 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: ["googlesheets"],
  });

  const composioMCPUrl = session.mcp.url;

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

  const composioTools = await mcpClient.getTools();

  const agent = new Agent({
    name: "googlesheets-mastra-agent",
    instructions: "You are an AI agent with Google Sheets 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: { googlesheets: 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 Google Sheets 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
TOOLS & TRIGGERS

Supported Tools and Triggers

Every Google Sheets action and event your agent gets out of the box.

Add Sheet to Existing Spreadsheet

Adds a new sheet to a spreadsheet.

Aggregate Column Data

Searches for rows where a specific column matches a value and performs mathematical operations on data from another column.

Append Dimension

Tool to append new rows or columns to a sheet, increasing its size.

Auto-Resize Rows or Columns

Auto-fit column widths or row heights for a dimension range using batchUpdate.

Batch Clear Values By Data Filter

Clears one or more ranges of values from a spreadsheet using data filters.

Batch get spreadsheet

Retrieves data from specified cell ranges in a Google Spreadsheet.

Batch Update Values by Data Filter

Tool to update values in ranges matching data filters.

Clear Basic Filter

Tool to clear the basic filter from a sheet.

Clear spreadsheet values

Clears cell content (preserving formatting and notes) from a specified A1 notation range in a Google Spreadsheet; the range must correspond to an existing sheet and cells.

Create Chart in Google Sheets

Create a chart in a Google Sheets spreadsheet using the specified data range and chart type.

Create a Google Sheet

Creates a new Google Spreadsheet in Google Drive.

Create spreadsheet column

Creates a new column in a Google Spreadsheet.

Create spreadsheet row

Inserts a new, empty row into a specified sheet of a Google Spreadsheet at a given index, optionally inheriting formatting from the row above.

Delete Chart from Google Sheets

Delete an existing chart from a Google Sheets spreadsheet.

Delete Dimension (Rows/Columns)

Tool to delete specified rows or columns from a sheet in a Google Spreadsheet.

Delete Sheet

Tool to delete a sheet (worksheet) from a spreadsheet.

Find and Replace in Spreadsheet

Tool to find and replace text in a Google Spreadsheet.

Format cell

Applies text and background cell formatting to a specified range in a Google Sheets worksheet.

Get conditional format rules

List conditional formatting rules for each sheet (or a selected sheet) in a normalized, easy-to-edit form.

Get Data Validation Rules

Tool to extract data validation rules from a Google Sheets spreadsheet.

Get sheet names

Lists all worksheet names from a specified Google Spreadsheet (which must exist), useful for discovering sheets before further operations.

Get Spreadsheet by Data Filter

Returns the spreadsheet at the given ID, filtered by the specified data filters.

Get spreadsheet info

Retrieves metadata for a Google Spreadsheet using its ID.

Insert Dimension in Google Sheet

Tool to insert new rows or columns into a sheet at a specified location.

Look up spreadsheet row

Finds the first row in a Google Spreadsheet where a cell's entire content exactly matches the query string, searching within a specified A1 notation range or the first sheet by default.

Mutate conditional format rules

Add, update, delete, or reorder conditional format rules on a Google Sheet.

Search Developer Metadata

Tool to search for developer metadata in a spreadsheet.

Search Spreadsheets

Search for Google Spreadsheets using various filters including name, content, date ranges, and more.

Set Basic Filter

Tool to set a basic filter on a sheet in a Google Spreadsheet.

Set Data Validation Rule

Tool to set or clear data validation rules (including dropdowns) on a range in Google Sheets.

Copy Sheet to Another Spreadsheet

Tool to copy a single sheet from a spreadsheet to another spreadsheet.

Append Values to Spreadsheet

Tool to append values to a spreadsheet.

Batch Clear Spreadsheet Values

Tool to clear one or more ranges of values from a spreadsheet.

Batch Get Spreadsheet Values by Data Filter

Tool to return one or more ranges of values from a spreadsheet that match the specified data filters.

Update Chart in Google Sheets

Update the specification of an existing chart in a Google Sheets spreadsheet.

Update Dimension Properties (Hide/Unhide & Resize)

Tool to hide/unhide rows or columns and set row heights or column widths.

Update Sheet Properties

Tool to update properties of a sheet (worksheet) within a Google Spreadsheet, such as its title, index, visibility, tab color, or grid properties.

Update Spreadsheet Properties

Tool to update SPREADSHEET-LEVEL properties such as the spreadsheet's title, locale, time zone, or auto-recalculation settings.

Batch update spreadsheet values

Tool to set values in one or more ranges of a spreadsheet.

Upsert Rows (Smart Update/Insert)

Upsert rows - update existing rows by key, append new ones.

Get spreadsheet values

Returns a range of values from a spreadsheet.

Update spreadsheet values

Tool to set values in a range of a Google Spreadsheet.

FRAMEWORKS

How to build Google Sheets MCP Agent with another framework

ChatGPT logo

ChatGPT

Use Google Sheets MCP with ChatGPT

OpenAI Agents SDK logo

OpenAI Agents SDK

Use Google Sheets MCP with OpenAI Agents SDK

Claude Agent SDK logo

Claude Agent SDK

Use Google Sheets MCP with Claude Agent SDK

Claude Code logo

Claude Code

Use Google Sheets MCP with Claude Code

Claude Cowork logo

Claude Cowork

Use Google Sheets MCP with Claude Cowork

Codex logo

Codex

Use Google Sheets MCP with Codex

Cursor logo

Cursor

Use Google Sheets MCP with Cursor

OpenClaw logo

OpenClaw

Use Google Sheets MCP with OpenClaw

Hermes logo

Hermes

Use Google Sheets MCP with Hermes

CLI logo

CLI

Use Google Sheets MCP with CLI

Google ADK logo

Google ADK

Use Google Sheets MCP with Google ADK

LangChain logo

LangChain

Use Google Sheets MCP with LangChain

Vercel AI SDK logo

Vercel AI SDK

Use Google Sheets MCP with Vercel AI SDK

LlamaIndex logo

LlamaIndex

Use Google Sheets MCP with LlamaIndex

CrewAI logo

CrewAI

Use Google Sheets MCP with CrewAI

OpenCode logo

OpenCode

Use Google Sheets MCP with OpenCode

VS Code logo

VS Code

Use Google Sheets MCP with VS Code

FAQ

Frequently asked questions

With a standalone Google Sheets MCP server, the agents and LLMs can only access a fixed set of Google Sheets tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Google Sheets and many other apps based on the task at hand, all through a single MCP endpoint.

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 Google Sheets tools.

Yes, absolutely. You can configure which Google Sheets 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.

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 Google Sheets data and credentials are handled as safely as possible.

Start with Google Sheets.It takes 30 seconds.

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