How to integrate RedCircle API MCP with Mastra AI

This guide walks you through connecting RedCircle API to Mastra AI using the Composio tool router. By the end, you'll have a working RedCircle API agent that can search target for nintendo switch bundles, get reviews for dyson vacuums at target, list top-rated target products in electronics through natural language commands. This guide will help you understand how to give your Mastra AI agent real control over a RedCircle API account through Composio's RedCircle API MCP server. Before we dive in, let's take a quick look at the key ideas and tools involved.

Get started for free Get a demo

RedCircle API

Api Key

RedCircle API gives real-time access to Target's product catalog, reviews, and categories. Get up-to-date retail data for smarter product insights.

32 Tools

Managed auth

Connect RedCircle API without auth hassles

We manage OAuth, API keys, token refresh, and scopes — you just build.

Try for free

Introduction

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

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

Also integrate RedCircle API with

OpenAI Agents SDK Claude Agent SDK Claude Code Claude Cowork Codex OpenClaw Hermes CLI Google ADK LangChain Vercel AI SDK LlamaIndex CrewAI

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

The RedCircle API MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your RedCircle API account. It provides structured and secure access to Target product data, reviews, categories, collections, and account details, so your agent can research products, browse categories, manage scheduled collections, organize result delivery, and monitor usage on your behalf.

Real-time Target product research: Have your agent search Target products, retrieve product details, read customer reviews, and explore category listings.
Category discovery: Let the agent list and filter Target categories to help you explore the catalog and plan product research.
Scheduled data collections: Direct your agent to create, update, start, stop, or delete collections and manage the requests within them.
Results and cloud delivery: Instruct your agent to review collection result sets and create, update, list, or remove cloud storage destinations.
Account and location management: Have your agent check account usage and platform status, add ZIP codes for location targeting, or stop all active collections.

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:

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

Step-by-step Guide

Step by step09 STEPS

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 RedCircle API 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 RedCircle API

typescript

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

  const composioMCPUrl = session.mcp.url;
  console.log("RedCircle API MCP URL:", composioMCPUrl);

What's happening:

create spins up a short-lived MCP HTTP endpoint for this user
The toolkits array contains "redcircle_api" for RedCircle API 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 RedCircle API toolkit

Create the Mastra agent

typescript

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

  const composioMCPUrl = session.mcp.url;

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

  const composioTools = await mcpClient.getTools();

  const agent = new Agent({
    name: "redcircle_api-mastra-agent",
    instructions: "You are an AI agent with RedCircle API 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: { redcircle_api: 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 RedCircle API 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

Supported Tools

Every RedCircle API action and event your agent gets out of the box.

Add Zipcodes

Tool to add zipcodes to your RedCircle API account for geolocation targeting.

Clear Collection Requests

Tool to remove all requests from a specified collection.

Create Collection

Tool to create a new collection for running up to 15,000 requests on a schedule.

Create Destination

Tool to create a new destination for uploading Collection Result Sets to cloud storage.

Create Requests

Tool to add up to 1,000 requests to an existing collection.

Delete Collection

Tool to remove a collection from the system by ID.

Delete Destination

Tool to remove a destination from your RedCircle API account.

Delete Request from Collection

Tool to remove an individual request from a collection.

Delete Requests In Bulk

Tool to delete multiple requests from a collection in bulk.

Delete Zipcodes

Tool to remove zipcodes from your RedCircle API account.

Get Account Information

Tool to retrieve account information, usage metrics, and platform status.

Get Collection

Tool to retrieve complete information about a specific collection.

Get Requests CSV Links

Tool to retrieve CSV download links for all requests in a collection.

Get Requests JSON Links

Tool to retrieve download links for all requests in a collection in JSON format.

Get Result Set CSV

Tool to retrieve a result set in CSV format with optional field filtering.

Get Result Set JSON

Tool to retrieve a result set in JSON format with download links.

Get Result Set JSON Lines

Tool to retrieve a result set in JSON Lines format with download links.

Get Target Product Data

Tool to retrieve Target data in real-time including search results, product information, reviews, or category listings.

List Categories

Tool to retrieve all top-level (root) categories or filter results using optional parameters.

List Collections

Tool to retrieve all collections configured on your RedCircle API account with filtering and pagination.

List Destinations

Tool to retrieve all destinations configured on your RedCircle API account with pagination and filtering.

List Error Logs

Tool to list all error logs on your RedCircle API account.

List Requests by Page

Tool to retrieve requests for a collection in paginated format.

List Result Sets

Tool to list all result sets for a collection.

List Zipcodes

Tool to retrieve all zipcodes associated with your account with optional filtering.

Resend Webhook

Tool to resend a previously configured webhook POST request for a result set.

Start Collection

Tool to initiate execution of a RedCircle API collection.

Stop All Collections

Tool to halt all currently active collections on your account.

Stop Collection

Tool to halt an active collection in queued or running state.

Update Collection

Tool to update an existing collection's configuration and settings.

Update Destination

Tool to modify an existing destination configuration on your RedCircle API account.

Update Request

Tool to modify a request within a collection.

FRAMEWORKS

How to build RedCircle API MCP Agent with another framework

OpenAI Agents SDK

Use RedCircle API MCP with OpenAI Agents SDK

Claude Agent SDK

Use RedCircle API MCP with Claude Agent SDK

Claude Code

Use RedCircle API MCP with Claude Code

Claude Cowork

Use RedCircle API MCP with Claude Cowork

Codex

Use RedCircle API MCP with Codex

OpenClaw

Use RedCircle API MCP with OpenClaw

Hermes

Use RedCircle API MCP with Hermes

CLI

Use RedCircle API MCP with CLI

Google ADK

Use RedCircle API MCP with Google ADK

LangChain

Use RedCircle API MCP with LangChain

Vercel AI SDK

Use RedCircle API MCP with Vercel AI SDK

LlamaIndex

Use RedCircle API MCP with LlamaIndex

CrewAI

Use RedCircle API MCP with CrewAI

MORE TOOLKITS

Explore Other Toolkits

Toolkit marketplace

Bluebarry

Api Key

Bluebarry is a customer data and product-advice platform for shopper identities, profiles, and recommendations. It helps teams analyze customer context and synchronize shopper data for better commerce experiences.

Btcpay server

Api Key

BTCPay Server is a free, open-source, self-hosted Bitcoin payment processor. It lets merchants accept Bitcoin payments directly, cutting out middlemen and boosting privacy.

Cdr platform

Api Key

Cdr platform is an API for purchasing carbon dioxide removal services. It enables businesses to offset emissions by accessing verified carbon removal projects.

Cloudcart

Api Key

CloudCart is an e-commerce platform for building and managing online stores. It helps businesses streamline product listings, orders, and customer engagement.

FAQ

Frequently asked questions

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

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

Start with RedCircle API.It takes 30 seconds.

Managed auth, hosted MCP servers, and every RedCircle API tool your agent needs.Free to start.

Start building

Customer stories

Teams ship real agents on Composio

GET STARTED FOR FREE BOOK A DEMO

Karan skipped his own birthday party to fix our critical issue. It was 10pm and he diverted his Waymo to help us instead. This really sets the bar — it shows the commitment you need when users rely on your software.

Harsha Gaddipati

Co-founder, Slashy

A lot of students tell us that the moment their connected tools start talking to each other inside Opennote feels almost magical. The agent just knows them, and it's immensely helped keep new users on the platform.

Abhi Arya

Co-founder, Opennote

We chose Composio over Pipedream because it delivered depth where it mattered — niche tools and tricky edge cases other platforms simply ignored. That gave us confidence to scale without compromising.

Nirman Dave

CEO, Zams

As a solo builder, shipping fast is life or death. The only way I can outcompete incumbents is by outmanoeuvring them. Getting bogged down managing agent auth would have been a death sentence.

Ryan Yu

Founder, Extra Thursday

Before Composio, adding tool integrations was slow and resource-intensive. Each one could take weeks of engineering time, and maintaining them meant constantly keeping up with API changes.

Tomisin Jenrola

Founder & CEO, SwarmZero

With hands-on help from their founder, we integrated Gmail and Google Drive in just 30 minutes. This level of personal support and commitment is exactly what startups should strive for.

Jerome Leclanche

Co-Founder, Ingram Technologies

How to integrate RedCircle API MCP with Mastra AI

Connect RedCircle API without auth hassles

Introduction

Also integrate RedCircle API with

TL;DR

What is Mastra AI?

What is the RedCircle API MCP server, and what's possible with it?

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

What is Composio SDK?

How the Composio SDK works

Step-by-step Guide

Prerequisites

Getting API Keys for OpenAI and Composio

Install dependencies

Set up environment variables

Import libraries and validate environment

Create a Tool Router session for RedCircle API

Configure Mastra MCP client and fetch tools

Create the Mastra agent

Set up interactive chat interface

Complete Code

Conclusion

Supported Tools

How to build RedCircle API MCP Agent with another framework

OpenAI Agents SDK

Claude Agent SDK

Claude Code

Claude Cowork

Codex

OpenClaw

Hermes

CLI

Google ADK

LangChain

Vercel AI SDK

LlamaIndex

CrewAI

Explore Other Toolkits

Bluebarry

Btcpay server

Cdr platform

Cloudcart

Frequently asked questions

What are the differences in Tool Router MCP and RedCircle API MCP?+

Can I use Tool Router MCP with Mastra AI?+

Can I manage the permissions and scopes for RedCircle API while using Tool Router?+

How safe is my data with Composio Tool Router?+

Start with RedCircle API.It takes 30 seconds.

Teams ship real agents on Composio