How to integrate Hub Planner MCP with Vercel AI SDK v6

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Introduction

This guide walks you through connecting Hub Planner to Vercel AI SDK v6 using the Composio tool router. By the end, you'll have a working Hub Planner agent that can show all upcoming project bookings for my team, log 8 hours timesheet for john doe, list all unassigned resources this month through natural language commands.

This guide will help you understand how to give your Vercel AI SDK agent real control over a Hub Planner account through Composio's Hub Planner 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:
  • How to set up and configure a Vercel AI SDK agent with Hub Planner integration
  • Using Composio's Tool Router to dynamically load and access Hub Planner tools
  • Creating an MCP client connection using HTTP transport
  • Building an interactive CLI chat interface with conversation history management
  • Handling tool calls and results within the Vercel AI SDK framework

What is Vercel AI SDK?

The Vercel AI SDK is a TypeScript library for building AI-powered applications. It provides tools for creating agents that can use external services and maintain conversation state.

Key features include:

  • streamText: Core function for streaming responses with real-time tool support
  • MCP Client: Built-in support for Model Context Protocol via @ai-sdk/mcp
  • Step Counting: Control multi-step tool execution with stopWhen: stepCountIs()
  • OpenAI Provider: Native integration with OpenAI models

What is the Hub Planner MCP server, and what's possible with it?

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

Supported Tools & Triggers

Tools
Add Clients to ProjectTool to add clients to a project by project ID.
Add project custom field choicesAdd choices to a project custom field template of SELECT, RADIO, or CHECKBOX type.
Add Projects to GroupTool to add projects to a project group in Hub Planner.
Add Project TagsTool to add tags to a Hub Planner project.
Add Resource Custom Field ChoicesTool to add choices to a resource custom field template of SELECT, RADIO, or CHECKBOX type.
Add Resources to ProjectTool to add resources to a project by project ID.
Add Resources to Resource GroupTool to add resources to a resource group by group ID.
Add Resource TagsTool to add tags to a resource in Hub Planner.
Create Billing RateTool to create a new billing rate in Hub Planner.
Create BookingTool to create a new booking for a resource on a project in Hub Planner.
Create Booking CategoryTool to create a new booking category in Hub Planner.
Create ClientTool to create a new client in Hub Planner.
Create Cost CategoryTool to create a new project cost category in Hub Planner.
Create EventTool to create a new event in Hub Planner.
Create HolidayTool to create a new holiday in Hub Planner.
Create MilestoneTool to create a new milestone for a project in Hub Planner.
Create ProjectTool to create a new project in Hub Planner.
Create Project Custom Field TemplateTool to create a new project custom field template in Hub Planner.
Create Project GroupTool to create a new project group in Hub Planner.
Create Project TagTool to create a new project tag in Hub Planner.
Create ResourceTool to create a new resource in Hub Planner.
Create Resource Custom Field TemplateTool to create a new resource custom field template in Hub Planner.
Create Resource TagTool to create a new resource tag in Hub Planner.
Create Time EntryTool to create a new time entry for a resource on a project in Hub Planner.
Create VacationTool to create a new vacation request for a resource in Hub Planner.
Delete Billing RateTool to delete a specific billing rate by ID in Hub Planner.
Delete BookingTool to delete a specific booking by ID in Hub Planner.
Delete BookingsTool to delete multiple bookings by IDs, resource ID, or project ID.
Delete ClientTool to delete a specific client by ID in Hub Planner.
Delete Cost CategoryTool to delete a specific project cost category by ID in Hub Planner.
Delete EventTool to delete a specific event by ID in Hub Planner.
Delete HolidayTool to delete a specific holiday by ID in Hub Planner.
Delete MilestoneTool to delete a specific milestone by ID in Hub Planner.
Delete ProjectTool to delete a specific project by ID in Hub Planner.
Delete Project Custom Field TemplateTool to delete a project custom field template by its ID.
Delete Project GroupTool to delete a specific project group by ID in Hub Planner.
Delete ProjectsTool to delete multiple projects by their IDs in a single operation.
Delete Project TagTool to delete a specific project tag by ID in Hub Planner.
Delete ResourceTool to delete a specific resource by ID.
Delete Resource Custom Field TemplateTool to delete a specific resource custom field template by ID.
Delete resourcesTool to delete multiple resources by their IDs in a single operation.
Delete Resource TagTool to delete a specific resource tag by ID in Hub Planner.
Delete Time EntriesTool to delete multiple time entries by their IDs in a single operation.
Delete Time EntryTool to delete a specific time entry by ID in Hub Planner.
Delete VacationTool to delete a specific vacation by ID in Hub Planner.
Get Billing Rate by IDTool to retrieve a specific billing rate by ID from Hub Planner.
Get Booking by IDTool to retrieve a specific booking by ID from Hub Planner.
Get Booking Category by IDTool to retrieve a specific booking category by ID from Hub Planner.
Get Client by IDTool to retrieve a specific client by ID from Hub Planner.
Get Cost CategoryTool to retrieve a specific project cost category by ID from Hub Planner.
Get Event by IDTool to retrieve a specific event by ID from Hub Planner.
Get Holiday by IDTool to retrieve a specific holiday by ID from Hub Planner.
Get MilestoneTool to retrieve a specific milestone by ID from Hub Planner.
Get ProjectTool to retrieve a specific project by ID from Hub Planner.
Get Project Custom Field TemplateTool to retrieve a specific project custom field template by ID.
Get Project Custom Field TemplatesTool to retrieve all project custom field templates defined for your Hub Planner account.
Get Project GroupTool to retrieve a specific project group by ID from Hub Planner.
Get Project TagsTool to retrieve all tags associated with a specific Hub Planner project.
Get Resource by IDTool to retrieve a specific resource by ID from Hub Planner.
Get Resource Custom Field TemplateTool to retrieve a specific resource custom field template by ID from Hub Planner.
Get Resource Custom Field TemplatesTool to retrieve custom field templates defined for resources in your Hub Planner account.
Get Resource TagsTool to retrieve all tags associated with a specific resource from Hub Planner.
Get Time Entry by IDTool to retrieve a specific time entry by ID from Hub Planner.
Get Vacation by IDTool to retrieve a specific vacation by ID from Hub Planner.
List Billing RatesTool to retrieve all billing rates from Hub Planner.
List Booking CategoriesTool to retrieve all booking categories from Hub Planner.
List BookingsTool to retrieve all bookings from Hub Planner with pagination support.
List Category GroupsTool to get all category groups from Hub Planner.
List ClientsTool to get all clients from Hub Planner.
List Cost CategoriesTool to retrieve all project cost categories from Hub Planner.
List EventsTool to retrieve all events from Hub Planner.
List HolidaysTool to retrieve all public holidays from Hub Planner.
List Project GroupsTool to get all project groups from Hub Planner.
List Project ManagersTool to get all project managers from Hub Planner.
List ProjectsTool to retrieve all projects from Hub Planner.
List Project TagsTool to retrieve all project tags from Hub Planner.
List Resource GroupsTool to get all resource groups from Hub Planner.
List ResourcesTool to get all resources from Hub Planner.
List Resource TagsTool to get all resource tags from Hub Planner.
List Time EntriesTool to get all time entries from Hub Planner.
List Unassigned WorkTool to retrieve all unassigned work from Hub Planner.
List VacationsTool to retrieve all vacations from Hub Planner.
Patch BookingTool to partially update an existing booking in Hub Planner.
Patch VacationTool to partially update an existing vacation by ID in Hub Planner.
Remove Client From ProjectsTool to remove a client from one or more projects in Hub Planner.
Remove Project From GroupsTool to remove a project from one or more project groups in Hub Planner.
Remove Project TagTool to remove a tag from a Hub Planner project.
Remove Resource from ProjectsTool to remove a resource from one or more projects in Hub Planner.
Remove Resource TagTool to remove a tag from a resource.
Search Billing RatesTool to search billing rates in Hub Planner with filters.
Search Booking CategoriesTool to search booking categories in Hub Planner with filters.
Search BookingsTool to search bookings in Hub Planner with advanced filters.
Search ClientsTool to search clients with filters in Hub Planner.
Search Cost CategoriesTool to search project cost categories in Hub Planner with filters.
Search EventsTool to search events with filters in Hub Planner.
Search HolidaysTool to search holidays with filters in Hub Planner.
Search MilestonesTool to search milestones in Hub Planner with filters.
Search Project Custom FieldsTool to search project custom field templates by type, label, or required status.
Search ProjectsTool to search projects with filters in Hub Planner.
Search Resource Custom Field TemplatesTool to search resource custom field templates by type, label, or other properties.
Search resourcesTool to search for resources with various filters in Hub Planner.
Search Time EntriesTool to search time entries with filters in Hub Planner.
Search VacationsTool to search vacations in Hub Planner with advanced filters.
Set Project ManagersTool to set project managers for a Hub Planner project.
Update Billing RateTool to update an existing billing rate by ID in Hub Planner.
Update BookingTool to update an existing booking in Hub Planner by ID.
Update Booking CategoryTool to update an existing booking category by ID in Hub Planner.
Update ClientTool to update an existing client by ID in Hub Planner.
Update Cost CategoryTool to update an existing project cost category by ID in Hub Planner.
Update EventTool to update an existing event in Hub Planner by ID.
Update HolidayTool to update an existing holiday by ID in Hub Planner.
Update MilestoneTool to update an existing milestone by ID in Hub Planner.
Update Project Custom Field TemplateTool to update an existing project custom field template in Hub Planner.
Update Project GroupTool to update an existing project group by ID in Hub Planner.
Update Hub Planner projectsTool to update one or more projects in Hub Planner.
Update Project TagTool to update an existing project tag by ID in Hub Planner.
Update Resource Custom Field TemplateTool to update an existing resource custom field template in Hub Planner.
Update Resource GroupTool to update an existing resource group by ID in Hub Planner.
Update ResourcesTool to update one or more resources in Hub Planner.
Update Resource TagTool to update an existing resource tag by ID in Hub Planner.
Update Time EntryTool to update an existing time entry by ID in Hub Planner.
Update VacationTool to update an existing vacation by ID in Hub Planner.

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 you begin, make sure you have:
  • Node.js and npm installed
  • A Composio account with API key
  • An OpenAI API key

Getting API Keys for OpenAI and Composio

OpenAI API Key
  • Go to the OpenAI dashboard and create an API key. You'll need credits to use the models, or you can connect to another model provider.
  • Keep the API key safe.
Composio API Key
  • Log in to the Composio dashboard.
  • Navigate to your API settings and generate a new API key.
  • Store this key securely as you'll need it for authentication.

Install required dependencies

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

First, install the necessary packages for your project.

What you're installing:

  • @ai-sdk/openai: Vercel AI SDK's OpenAI provider
  • @ai-sdk/mcp: MCP client for Vercel AI SDK
  • @composio/core: Composio SDK for tool integration
  • ai: Core Vercel AI SDK
  • dotenv: Environment variable management

Set up environment variables

bash
OPENAI_API_KEY=your_openai_api_key_here
COMPOSIO_API_KEY=your_composio_api_key_here
COMPOSIO_USER_ID=your_user_id_here

Create a .env file in your project root.

What's needed:

  • OPENAI_API_KEY: Your OpenAI API key for GPT model access
  • COMPOSIO_API_KEY: Your Composio API key for tool access
  • COMPOSIO_USER_ID: A unique identifier for the user session

Import required modules and validate environment

typescript
import "dotenv/config";
import { openai } from "@ai-sdk/openai";
import { Composio } from "@composio/core";
import * as readline from "readline";
import { streamText, type ModelMessage, stepCountIs } from "ai";
import { createMCPClient } from "@ai-sdk/mcp";

const composioAPIKey = process.env.COMPOSIO_API_KEY;
const composioUserID = process.env.COMPOSIO_USER_ID;

if (!process.env.OPENAI_API_KEY) 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,
});
What's happening:
  • We're importing all necessary libraries including Vercel AI SDK's OpenAI provider and Composio
  • The dotenv/config import automatically loads environment variables
  • The MCP client import enables connection to Composio's tool server

Create Tool Router session and initialize MCP client

typescript
async function main() {
  // Create a tool router session for the user
  const session = await composio.create(composioUserID!, {
    toolkits: ["hub_planner"],
  });

  const mcpUrl = session.mcp.url;
What's happening:
  • We're creating a Tool Router session that gives your agent access to Hub Planner tools
  • The create method takes the user ID and specifies which toolkits should be available
  • The returned mcp object contains the URL and authentication headers needed to connect to the MCP server
  • This session provides access to all Hub Planner-related tools through the MCP protocol

Connect to MCP server and retrieve tools

typescript
const mcpClient = await createMCPClient({
  transport: {
    type: "http",
    url: mcpUrl,
    headers: session.mcp.headers, // Authentication headers for the Composio MCP server
  },
});

const tools = await mcpClient.tools();
What's happening:
  • We're creating an MCP client that connects to our Composio Tool Router session via HTTP
  • The mcp.url provides the endpoint, and mcp.headers contains authentication credentials
  • The type: "http" is important - Composio requires HTTP transport
  • tools() retrieves all available Hub Planner tools that the agent can use

Initialize conversation and CLI interface

typescript
let messages: ModelMessage[] = [];

console.log("Chat started! Type 'exit' or 'quit' to end the conversation.\n");
console.log(
  "Ask any questions related to hub_planner, like summarize my last 5 emails, send an email, etc... :)))\n",
);

const rl = readline.createInterface({
  input: process.stdin,
  output: process.stdout,
  prompt: "> ",
});

rl.prompt();
What's happening:
  • We initialize an empty messages array to maintain conversation history
  • A readline interface is created to accept user input from the command line
  • Instructions are displayed to guide the user on how to interact with the agent

Handle user input and stream responses with real-time tool feedback

typescript
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({ role: "user", content: trimmedInput });
  console.log("\nAgent is thinking...\n");

  try {
    const stream = streamText({
      model: openai("gpt-5"),
      messages,
      tools,
      toolChoice: "auto",
      stopWhen: stepCountIs(10),
      onStepFinish: (step) => {
        for (const toolCall of step.toolCalls) {
          console.log(`[Using tool: ${toolCall.toolName}]`);
          }
          if (step.toolCalls.length > 0) {
            console.log(""); // Add space after tool calls
          }
        },
      });

      for await (const chunk of stream.textStream) {
        process.stdout.write(chunk);
      }

      console.log("\n\n---\n");

      // Get final result for message history
      const response = await stream.response;
      if (response?.messages?.length) {
        messages.push(...response.messages);
      }
    } catch (error) {
      console.error("\nAn error occurred while talking to the agent:");
      console.error(error);
      console.log(
        "\nYou can try again or restart the app if it keeps happening.\n",
      );
    } finally {
      rl.prompt();
    }
  });

  rl.on("close", async () => {
    await mcpClient.close();
    console.log("\nđź‘‹ Session ended.");
    process.exit(0);
  });
}

main().catch((err) => {
  console.error("Fatal error:", err);
  process.exit(1);
});
What's happening:
  • We use streamText instead of generateText to stream responses in real-time
  • toolChoice: "auto" allows the model to decide when to use Hub Planner tools
  • stopWhen: stepCountIs(10) allows up to 10 steps for complex multi-tool operations
  • onStepFinish callback displays which tools are being used in real-time
  • We iterate through the text stream to create a typewriter effect as the agent responds
  • The complete response is added to conversation history to maintain context
  • Errors are caught and displayed with helpful retry suggestions

Complete Code

Here's the complete code to get you started with Hub Planner and Vercel AI SDK:

typescript
import "dotenv/config";
import { openai } from "@ai-sdk/openai";
import { Composio } from "@composio/core";
import * as readline from "readline";
import { streamText, type ModelMessage, stepCountIs } from "ai";
import { createMCPClient } from "@ai-sdk/mcp";

const composioAPIKey = process.env.COMPOSIO_API_KEY;
const composioUserID = process.env.COMPOSIO_USER_ID;

if (!process.env.OPENAI_API_KEY) 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,
});

async function main() {
  // Create a tool router session for the user
  const session = await composio.create(composioUserID!, {
    toolkits: ["hub_planner"],
  });

  const mcpUrl = session.mcp.url;

  const mcpClient = await createMCPClient({
    transport: {
      type: "http",
      url: mcpUrl,
      headers: session.mcp.headers, // Authentication headers for the Composio MCP server
    },
  });

  const tools = await mcpClient.tools();

  let messages: ModelMessage[] = [];

  console.log("Chat started! Type 'exit' or 'quit' to end the conversation.\n");
  console.log(
    "Ask any questions related to hub_planner, like summarize my last 5 emails, send an email, etc... :)))\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({ role: "user", content: trimmedInput });
    console.log("\nAgent is thinking...\n");

    try {
      const stream = streamText({
        model: openai("gpt-5"),
        messages,
        tools,
        toolChoice: "auto",
        stopWhen: stepCountIs(10),
        onStepFinish: (step) => {
          for (const toolCall of step.toolCalls) {
            console.log(`[Using tool: ${toolCall.toolName}]`);
          }
          if (step.toolCalls.length > 0) {
            console.log(""); // Add space after tool calls
          }
        },
      });

      for await (const chunk of stream.textStream) {
        process.stdout.write(chunk);
      }

      console.log("\n\n---\n");

      // Get final result for message history
      const response = await stream.response;
      if (response?.messages?.length) {
        messages.push(...response.messages);
      }
    } catch (error) {
      console.error("\nAn error occurred while talking to the agent:");
      console.error(error);
      console.log(
        "\nYou can try again or restart the app if it keeps happening.\n",
      );
    } finally {
      rl.prompt();
    }
  });

  rl.on("close", async () => {
    await mcpClient.close();
    console.log("\nđź‘‹ Session ended.");
    process.exit(0);
  });
}

main().catch((err) => {
  console.error("Fatal error:", err);
  process.exit(1);
});

Conclusion

You've successfully built a Hub Planner agent using the Vercel AI SDK with streaming capabilities! This implementation provides a powerful foundation for building AI applications with natural language interfaces and real-time feedback.

Key features of this implementation:

  • Real-time streaming responses for a better user experience with typewriter effect
  • Live tool execution feedback showing which tools are being used as the agent works
  • Dynamic tool loading through Composio's Tool Router with secure authentication
  • Multi-step tool execution with configurable step limits (up to 10 steps)
  • Comprehensive error handling for robust agent execution
  • Conversation history maintenance for context-aware responses

You can extend this further by adding custom error handling, implementing specific business logic, or integrating additional Composio toolkits to create multi-app workflows.

How to build Hub Planner MCP Agent with another framework

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FAQ

What are the differences in Tool Router MCP and Hub Planner MCP?

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

Can I use Tool Router MCP with Vercel AI SDK v6?

Yes, you can. Vercel AI SDK v6 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 Hub Planner tools.

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

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

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