How to integrate Simla com MCP with Vercel AI SDK v6

This guide walks you through connecting Simla com to Vercel AI SDK v6 using the Composio tool router. By the end, you'll have a working Simla com agent that can create a new customer with email and phone, update order status for a specific order, list customers who registered this week through natural language commands. This guide will help you understand how to give your Vercel AI SDK agent real control over a Simla com account through Composio's Simla com MCP server. Before we dive in, let's take a quick look at the key ideas and tools involved.

Simla com logoSimla com
Api Key

Simla.com is a platform for integrating delivery services, managing orders, and handling customer data through robust APIs. It streamlines logistics, order tracking, and customer management for fast-growing businesses.

141 Tools

Introduction

This guide walks you through connecting Simla com to Vercel AI SDK v6 using the Composio tool router. By the end, you'll have a working Simla com agent that can create a new customer with email and phone, update order status for a specific order, list customers who registered this week through natural language commands.

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

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

Also integrate Simla com with

TL;DR

Here's what you'll learn:
  • How to set up and configure a Vercel AI SDK agent with Simla com integration
  • Using Composio's Tool Router to dynamically load and access Simla com 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 Simla com MCP server, and what's possible with it?

The Simla com MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Simla com account. It provides structured and secure access to customer records, order management, delivery integration, and custom field data, so your agent can perform actions like creating orders, managing customers, updating tasks, and extending your CRM—all on your behalf.

  • Customer management and updates: Easily create new customers, update their details, or fetch specific customer profiles using flexible filters and identifiers.
  • Order creation and editing: Let your agent register new orders, update existing ones, or retrieve order information to streamline your sales and fulfillment workflows.
  • Custom field management: Enable your agent to create or update custom metadata fields for orders, customers, or companies, so your CRM data model can adapt to your business needs.
  • Task automation and tracking: Automatically create new tasks, assign them to team members, and keep all task details up to date for efficient collaboration and follow-up.
  • Bulk customer retrieval and segmentation: Fetch lists of customers with custom filters to support segmentation, analysis, or targeted outreach directly from your agent.

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 you begin, make sure you have:
  • Node.js and npm installed
  • A Composio account with API key
  • An OpenAI API key
2

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.
3

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
4

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
5

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
6

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: ["simla_com"],
  });

  const mcpUrl = session.mcp.url;
What's happening:
  • We're creating a Tool Router session that gives your agent access to Simla com 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 Simla com-related tools through the MCP protocol
7

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 Simla com tools that the agent can use
8

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 simla_com, 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
9

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("\n👋 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 Simla com 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 Simla com 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: ["simla_com"],
  });

  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 simla_com, 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("\n👋 Session ended.");
    process.exit(0);
  });
}

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

Conclusion

You've successfully built a Simla com 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.
TOOLS

Supported Tools

Every Simla com action and event your agent gets out of the box.

Add Customer Interaction Favorite

Tool to add a product offer to a customer's list of favorites.

Combine Customers

Tool to combine multiple customers into one.

Combine Corporate Customers

Tool to combine multiple corporate customers into one.

Combine Orders

Tool to combine two orders into one.

Create Cost

Create a new cost record in Simla CRM.

Create Customer

Creates a new customer in Simla.

Create Corporate Customer

Creates a new corporate customer in Simla.

Create Customer Interaction Cart Set

Tool to create or overwrite shopping cart data for a customer.

Create Corporate Customer Address

Creates a new address for a corporate customer in Simla.

Create Corporate Customer Company

Tool to create a company for a corporate customer in Simla.

Create Corporate Customer Contact

Tool to create a link between a corporate customer and a contact person.

Create Corporate Customer Note

Tool to create a note for a corporate customer.

Create Customer Note

Tool to create a note for a customer.

Create Custom Field

Tool to create a custom field for a specified entity in Simla.

Create Custom Fields Dictionary

Tool to create a custom fields dictionary with elements.

Calculate Loyalty Discount

Tool to calculate maximum loyalty discount and bonuses for an order.

Create Order

Create a new order in Simla with customer details and line items.

Create Orders Link

Tool to create a link between multiple orders in Simla.

Create Order Pack

Tool to create a new order pack in Simla.

Create Order Payment

Create a new payment record for an order in Simla CRM.

Create Reference Courier

Tool to create a new courier in Simla.

Create Reference Currency

Tool to create a new currency in Simla.

Create Store Inventories Upload

Tool to batch update inventory quantities and purchase prices across warehouses/stores.

Create Store Product Groups

Tool to create a new product group in Simla.

Batch Create Store Products

Tool to batch create products and services in the store catalog.

Create Task

Tool to create a new task.

Create Web Analytics Visits Upload

Tool to batch upload web analytics visit records to Simla CRM.

Delete Cost

Tool to delete a cost by ID.

Delete Corporate Customer Note

Tool to delete a corporate customer note by ID.

Delete Customer Note

Tool to delete a customer note by ID.

Delete Order Payment

Tool to delete an order payment by ID.

Edit Cost

Tool to edit an existing cost record by ID.

Edit Customer

Tool to edit an existing customer.

Edit Corporate Customer

Tool to edit an existing corporate customer.

Edit Corporate Customer Address

Tool to edit an address for a corporate customer.

Edit Corporate Customer Company

Tool to edit a company associated with a corporate customer.

Edit Corporate Customer Contact

Tool to edit the link between a corporate customer and a contact person.

Edit Custom Field

Edit an existing custom field's properties by entity type and field code.

Edit Custom Fields Dictionary

Tool to edit an existing custom fields directory by code.

Edit Delivery Generic Setting

Tool to register or edit a delivery service integration configuration.

Edit File

Tool to edit an existing file by ID.

Edit Integration Module

Tool to create or edit an integration module configuration.

Edit Order

Tool to edit an existing order by external ID.

Edit Orders Payment

Tool to edit an existing order payment.

Edit Reference Cost Group

Tool to edit an existing cost group by code.

Edit Reference Cost Item

Tool to edit an existing cost item reference by code.

Edit Reference Courier

Tool to edit an existing courier by ID.

Edit Reference Currency

Tool to edit an existing currency configuration by ID.

Edit Reference Delivery Service

Tool to edit an existing delivery service by code.

Edit Reference Delivery Type

Tool to create or edit a delivery type in Simla.

Edit Reference Order Method

Tool to edit an existing order method reference by code.

Edit Reference Order Type

Tool to create or edit an order type by code.

Edit Reference Payment Status

Tool to edit an existing payment status reference by code.

Edit Reference Payment Type

Tool to edit an existing payment type or create a new one by code.

Edit Reference Price Type

Tool to edit an existing price type in the reference data.

Edit Product Status

Tool to create or edit product status in the reference directory.

Edit Reference Statuses

Tool to edit an existing order status reference by code.

Edit Reference Stores

Tool to create or edit a warehouse/store by code.

Edit Reference Subscription

Tool to create or edit a subscription category in Simla.

Edit Reference Unit

Tool to create or edit a unit of measurement reference by code.

Edit Store Product Group

Tool to edit an existing product group by external ID.

Edit Store Products Batch

Tool to batch edit multiple products and services at once.

Edit Store Setting

Tool to register or update warehouse system configuration in Simla.

Edit Task

Tool to edit an existing task.

Edit Telephony Setting

Tool to create or edit a telephony integration setting in Simla.

Fix Corporate Customers External IDs

Tool to perform mass recording of corporate customer external IDs in Simla.

Fix Customers External IDs

Tool to perform mass recording of customer external IDs in Simla.

Fix Orders External IDs

Tool to perform mass recording of order external IDs in Simla.

Get API Credentials

Tool to retrieve available API methods and stores for the current API key.

Get API Versions

Tool to retrieve a list of available API versions.

Get Cost

Retrieves detailed information about a specific cost record by its ID.

Get Customer

Retrieves detailed information about a specific customer by ID or external ID.

Get Corporate Customer

Retrieves detailed information about a corporate customer by external ID.

Get Customer Interaction Favorites

Tool to retrieve a list of favorite product offers for a specific customer.

Get Customers

Tool to retrieve a list of customers.

Get Corporate Customers

Tool to retrieve a list of corporate customers matching the specified filters.

Get Corporate Customer Companies

Tool to retrieve the list of companies associated with a corporate customer contact person.

Get Corporate Customers History

Tool to retrieve corporate customer change history for synchronization or audit purposes.

Get Corporate Customers Notes

Tool to retrieve a list of corporate customer notes.

Get Customers History

Tool to retrieve customer change history for synchronization or audit purposes.

Get Customers Notes

Tool to retrieve a list of customer notes.

Get Custom Field

Tool to retrieve detailed information about a specific custom field by entity and code.

Get Custom Fields

Tool to list custom fields.

Get Custom Fields Dictionaries

Tool to retrieve the list of custom dictionaries.

Get Custom Fields Dictionary

Tool to retrieve a custom fields dictionary by its code identifier.

Get Delivery Generic Setting

Tool to retrieve integration configuration for a delivery module instance.

Get Delivery Shipments

Tool to retrieve a list of delivery shipments.

Get Files

Tool to retrieve a list of files.

Get Loyalty Accounts

Tool to retrieve a list of customer loyalty program accounts.

Get Loyalty Bonus Operations

Tool to retrieve the history of bonus account operations for all participations.

Get Loyalty Loyalties

Tool to retrieve a list of loyalty programs.

Get Order

Tool to retrieve detailed information about a specific order.

Get Orders

Tool to retrieve a list of orders.

Get Orders History

Tool to retrieve order change history.

Get Orders Packs History

Tool to retrieve the history of order packing changes.

Get Products

Tool to retrieve a list of products.

Get Reference Cost Groups

Tool to retrieve a list of all cost groups configured in the system.

Get Reference Cost Items

Tool to retrieve a list of all cost items configured in the system.

Get Reference Countries

Tool to retrieve a list of all available country ISO codes in the system.

Get Reference Couriers

Tool to retrieve the list of available couriers.

Get Reference Currencies

Tool to retrieve the list of all configured currencies in the system.

Get Reference Delivery Services

Tool to retrieve a list of all configured delivery services in the system.

Get Reference Delivery Types

Tool to retrieve the list of delivery types from the system.

Get Reference Legal Entities

Tool to retrieve a list of all configured legal entities in the system.

Get MessageGateway Channels

Tool to retrieve a list of all MessageGateway channels in the system.

Get Reference Order Methods

Tool to retrieve a list of all available order methods in the system.

Get Reference Order Types

Tool to retrieve the list of order types from the system.

Get Reference Payment Statuses

Tool to retrieve the list of payment statuses configured in the system.

Get Reference Payment Types

Tool to retrieve a list of all configured payment types in the system.

Get Reference Price Types

Tool to retrieve the list of price types from the reference data.

Get Product Statuses

Tool to retrieve the list of all product statuses configured in the system.

Get Reference Statuses

Tool to retrieve the list of order statuses from the system.

Get Reference Status Groups

Tool to retrieve the list of all order status groups in the system.

Get Reference Subscriptions

Tool to retrieve the list of all subscription categories in the system.

Get Reference Units

Tool to retrieve the list of units of measurement from the system.

Get Segments

Tool to retrieve a list of customer segments.

Get Settings

Tool to retrieve system settings including default currency, language, timezone, and message gateway configuration.

Get Sites

Tool to retrieve a list of all configured sites/stores in the system.

Get Statistic Update

Tool to trigger an update of CRM basic statistics.

Get Store Inventories

Tool to retrieve store inventories with leftover stocks and purchasing prices.

Get Store Offers

Tool to retrieve a list of store offers with pagination support.

Get Store Products Properties

Tool to retrieve a list of product properties from the store.

Get Store Products Properties Values

Tool to retrieve product property values from the store.

Get Stores

Tool to retrieve a list of all warehouses/stores in the system.

Get Task

Retrieves detailed information about a specific task by its ID.

Get Tasks

Tool to retrieve a list of tasks with optional filters.

Get Tasks Comments

Tool to retrieve comments on a specific task by task ID.

Get Tasks History

Tool to retrieve task change history.

Get Telephony Setting

Tool to retrieve telephony integration settings by code.

Get User

Tool to retrieve detailed information about a specific user by ID.

Get User Groups

Tool to retrieve a list of user groups with their permissions and configuration.

Get Users

Tool to retrieve a list of users.

Update Customer Subscriptions

Tool to subscribe or unsubscribe a customer to mailing channels.

Update User Status

Tool to change a user's status.

Upload Costs

Tool to batch upload cost records to Simla CRM.

Upload Customers

Tool to batch upload customer records to Simla CRM.

Upload Corporate Customers

Tool to batch upload corporate customers to Simla.

Upload Orders

Upload multiple orders to Simla in a single batch operation.

Upload Store Prices

Tool to batch update SKU prices in Simla store catalog.

Upload Web Analytics Client IDs

Tool to batch upload web analytics client IDs to Simla CRM for tracking purposes.

Upload Web Analytics Sources

Tool to batch upload web analytics sources to Simla CRM.

FAQ

Frequently asked questions

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

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 Simla com tools.

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

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