# How to integrate Dub MCP with Mastra AI

```json
{
  "title": "How to integrate Dub MCP with Mastra AI",
  "toolkit": "Dub",
  "toolkit_slug": "dub",
  "framework": "Mastra AI",
  "framework_slug": "mastra-ai",
  "url": "https://composio.dev/toolkits/dub/framework/mastra-ai",
  "markdown_url": "https://composio.dev/toolkits/dub/framework/mastra-ai.md",
  "updated_at": "2026-03-29T06:31:40.325Z"
}
```

## Introduction

This guide walks you through connecting Dub to Mastra AI using the Composio tool router. By the end, you'll have a working Dub agent that can create a branded short link for event registration, show analytics for "newsletter" short link, update destination url for your sales link through natural language commands.
This guide will help you understand how to give your Mastra AI agent real control over a Dub account through Composio's Dub MCP server.
Before we dive in, let's take a quick look at the key ideas and tools involved.

## Also integrate Dub with

- [OpenAI Agents SDK](https://composio.dev/toolkits/dub/framework/open-ai-agents-sdk)
- [Claude Agent SDK](https://composio.dev/toolkits/dub/framework/claude-agents-sdk)
- [Claude Code](https://composio.dev/toolkits/dub/framework/claude-code)
- [Claude Cowork](https://composio.dev/toolkits/dub/framework/claude-cowork)
- [Codex](https://composio.dev/toolkits/dub/framework/codex)
- [OpenClaw](https://composio.dev/toolkits/dub/framework/openclaw)
- [Hermes](https://composio.dev/toolkits/dub/framework/hermes-agent)
- [CLI](https://composio.dev/toolkits/dub/framework/cli)
- [Google ADK](https://composio.dev/toolkits/dub/framework/google-adk)
- [LangChain](https://composio.dev/toolkits/dub/framework/langchain)
- [Vercel AI SDK](https://composio.dev/toolkits/dub/framework/ai-sdk)
- [LlamaIndex](https://composio.dev/toolkits/dub/framework/llama-index)
- [CrewAI](https://composio.dev/toolkits/dub/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 Dub tools
- Connect Mastra's MCP client to the Composio generated MCP URL
- Fetch Dub 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 Dub 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 Dub MCP server, and what's possible with it?

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

## Supported Tools

| Tool slug | Name | Description |
|---|---|---|
| `DUB_BULK_DELETE_LINKS` | Bulk Delete Links | Tool to delete multiple short links in bulk from Dub. Use when you need to remove multiple links at once. Maximum of 100 link IDs per request. Non-existing IDs are silently ignored. |
| `DUB_BULK_UPDATE_LINKS` | Bulk Update Links | Tool to update multiple short links in bulk. Use when you need to apply the same updates to multiple links at once by specifying link IDs or external IDs. |
| `DUB_CREATE_DOMAIN` | Create Domain | Tool to add a domain to a Dub workspace. Use when you need to create a new domain for shortening links. The domain must be verified before it can be used for link shortening. |
| `DUB_CREATE_TAG` | Create Tag | Tool to create a new tag in Dub. Use when you need to organize links by creating custom tags. Tags help categorize and filter links for better organization. |
| `DUB_DELETE_DOMAIN` | Delete Domain | Tool to delete a domain from your Dub workspace. Use when you need to permanently remove a domain. The domain must exist and be owned by your workspace. |
| `DUB_DELETE_TAG` | Delete Tag | Tool to delete a tag from Dub. Use when you need to remove a tag that is no longer needed. |
| `DUB_GET_LINK_INFO` | Get Link Info | Tool to retrieve details of a specific short link from Dub. Use when you need to get comprehensive information about a link including its configuration, targeting settings, and performance metrics. |
| `DUB_GET_LINKS` | Get Links | Tool to retrieve a paginated list of links for the authenticated workspace. Use when you need to list links with optional filtering by domain, tags, folder, search terms, or user. Supports pagination and sorting for efficient retrieval of large link collections. |
| `DUB_GET_LINKS_COUNT` | Get Links Count | Tool to retrieve the count of links in workspace with optional filters. Use when you need to get the total number of links matching specific criteria such as domain, tags, folder, or search terms. |
| `DUB_RETRIEVE_LIST_OF_TAGS` | Retrieve List of Tags | Tool to retrieve a list of tags from Dub. Use when you need to fetch all tags or search for specific tags by name or IDs. Supports pagination and sorting by name or creation date. |
| `DUB_GET_WORKSPACE` | Get Workspace | Tool to retrieve detailed information for a specific workspace. Use when you need to get workspace details including plan, usage limits, domains, users, and configuration settings. |
| `DUB_LIST_DOMAINS` | List Domains | Tool to retrieve a list of domains for the authenticated workspace. Use when you need to view all domains, search for specific domains, or filter domains by archived status. Supports pagination for large result sets. |
| `DUB_TRACK_DEEP_LINK_OPEN_EVENT` | Track Deep Link Open Event | Tool to track a deep link open event in Dub. Use when you need to record when a user opens your app via a deep link. Supports both direct tracking via deepLink parameter or probabilistic tracking via dubDomain parameter. |
| `DUB_UPDATE_DOMAIN` | Update Domain | Tool to update a domain configuration in Dub. Use when you need to modify domain settings like redirect URLs, placeholder text, archive status, or deep linking configurations. |
| `DUB_UPDATE_TAG` | Update Tag | Tool to update an existing tag by ID. Use when you need to change the name or color of a tag. |
| `DUB_UPDATE_WORKSPACE` | Update Workspace | Tool to update workspace settings in Dub. Use when you need to modify workspace name, slug, logo, or conversion tracking settings. |
| `DUB_UPSERT_A_LINK` | Upsert a Link | Tool to create or update a short link in Dub. Use when you need to create a new short link or update an existing one. If the link already exists (matching domain and key), it will be updated; otherwise, a new link will be created. |

## Supported Triggers

None listed.

## Creating MCP Server - Stand-alone vs Composio SDK

The Dub MCP server is an implementation of the Model Context Protocol that connects your AI agent to Dub. It provides structured and secure access so your agent can perform Dub 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 Dub 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 Dub

What's happening:
- create spins up a short-lived MCP HTTP endpoint for this user
- The toolkits array contains "dub" for Dub 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: ["dub"],
    },
  );

  const composioMCPUrl = session.mcp.url;
  console.log("Dub 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 Dub 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: "dub-mastra-agent",
    instructions: "You are an AI agent with Dub 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 Dub 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: {
        dub: 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: ["dub"],
  });

  const composioMCPUrl = session.mcp.url;

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

  const composioTools = await mcpClient.getTools();

  const agent = new Agent({
    name: "dub-mastra-agent",
    instructions: "You are an AI agent with Dub 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: { dub: 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 Dub 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 Dub MCP Agent with another framework

- [OpenAI Agents SDK](https://composio.dev/toolkits/dub/framework/open-ai-agents-sdk)
- [Claude Agent SDK](https://composio.dev/toolkits/dub/framework/claude-agents-sdk)
- [Claude Code](https://composio.dev/toolkits/dub/framework/claude-code)
- [Claude Cowork](https://composio.dev/toolkits/dub/framework/claude-cowork)
- [Codex](https://composio.dev/toolkits/dub/framework/codex)
- [OpenClaw](https://composio.dev/toolkits/dub/framework/openclaw)
- [Hermes](https://composio.dev/toolkits/dub/framework/hermes-agent)
- [CLI](https://composio.dev/toolkits/dub/framework/cli)
- [Google ADK](https://composio.dev/toolkits/dub/framework/google-adk)
- [LangChain](https://composio.dev/toolkits/dub/framework/langchain)
- [Vercel AI SDK](https://composio.dev/toolkits/dub/framework/ai-sdk)
- [LlamaIndex](https://composio.dev/toolkits/dub/framework/llama-index)
- [CrewAI](https://composio.dev/toolkits/dub/framework/crew-ai)

## Related Toolkits

- [Google Sheets](https://composio.dev/toolkits/googlesheets) - 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.
- [Notion](https://composio.dev/toolkits/notion) - Notion is a collaborative workspace for notes, docs, wikis, and tasks. It streamlines team knowledge, project tracking, and workflow customization in one place.
- [Airtable](https://composio.dev/toolkits/airtable) - Airtable combines the flexibility of spreadsheets with the power of a database for easy project and data management. Teams use Airtable to organize, track, and collaborate with custom views and automations.
- [Asana](https://composio.dev/toolkits/asana) - Asana is a collaborative work management platform for teams to organize and track projects. It streamlines teamwork, boosts productivity, and keeps everyone aligned on goals.
- [Google Tasks](https://composio.dev/toolkits/googletasks) - Google Tasks is a to-do list and task management tool integrated into Gmail and Google Calendar. It helps you organize, track, and complete tasks across your Google ecosystem.
- [Linear](https://composio.dev/toolkits/linear) - Linear is a modern issue tracking and project planning tool for fast-moving teams. It helps streamline workflows, organize projects, and boost productivity.
- [Firecrawl](https://composio.dev/toolkits/firecrawl) - Firecrawl automates large-scale web crawling and data extraction. It helps organizations efficiently gather, index, and analyze content from online sources.
- [Tavily](https://composio.dev/toolkits/tavily) - Tavily offers powerful search and data retrieval from documents, databases, and the web. It helps teams locate and filter information instantly, saving hours on research.
- [Jira](https://composio.dev/toolkits/jira) - Jira is Atlassian’s platform for bug tracking, issue tracking, and agile project management. It helps teams organize work, prioritize tasks, and deliver projects efficiently.
- [Exa](https://composio.dev/toolkits/exa) - Exa is a data extraction and search platform for gathering and analyzing information from websites, APIs, or databases. It helps teams quickly surface insights and automate data-driven workflows.
- [Serpapi](https://composio.dev/toolkits/serpapi) - SerpApi is a real-time API for structured search engine results. It lets you automate SERP data collection, parsing, and analysis for SEO and research.
- [Clickup](https://composio.dev/toolkits/clickup) - ClickUp is an all-in-one productivity platform for managing tasks, docs, goals, and team collaboration. It streamlines project workflows so teams can work smarter and stay organized in one place.
- [Monday](https://composio.dev/toolkits/monday) - Monday.com is a customizable work management platform for project planning and collaboration. It helps teams organize tasks, automate workflows, and track progress in real time.
- [Reddit](https://composio.dev/toolkits/reddit) - Reddit is a social news platform with thriving user-driven communities (subreddits). It's the go-to place for discussion, content sharing, and viral marketing.
- [Peopledatalabs](https://composio.dev/toolkits/peopledatalabs) - Peopledatalabs delivers B2B data enrichment and identity resolution APIs. Supercharge your apps with accurate, up-to-date business and contact data.
- [Snowflake](https://composio.dev/toolkits/snowflake) - Snowflake is a cloud data warehouse built for elastic scaling, secure data sharing, and fast SQL analytics across major clouds.
- [Facebook](https://composio.dev/toolkits/facebook) - Facebook is a social media and advertising platform for businesses and creators. It helps you connect, share, and manage content across your public Facebook Pages.
- [Posthog](https://composio.dev/toolkits/posthog) - PostHog is an open-source analytics platform for tracking user interactions and product metrics. It helps teams refine features, analyze funnels, and reduce churn with actionable insights.
- [Linkedin](https://composio.dev/toolkits/linkedin) - LinkedIn is a professional networking platform for connecting, sharing content, and engaging with business opportunities. It's the go-to place for building your professional brand and unlocking new career connections.
- [Active campaign](https://composio.dev/toolkits/active_campaign) - ActiveCampaign is a marketing automation and CRM platform for managing email campaigns, sales pipelines, and customer segmentation. It helps businesses engage customers and drive growth through smart automation and targeted outreach.

## Frequently Asked Questions

### What are the differences in Tool Router MCP and Dub MCP?

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

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

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

---
[See all toolkits](https://composio.dev/toolkits) · [Composio docs](https://docs.composio.dev/llms.txt)