How to integrate Sms alert MCP with Claude Agent SDK

This guide walks you through connecting Sms alert to the Claude Agent SDK using the Composio tool router. By the end, you'll have a working Sms alert agent that can check your current sms credit balance, create a new contact group for marketing, fetch your available sender ids through natural language commands. This guide will help you understand how to give your Claude Agent SDK agent real control over a Sms alert account through Composio's Sms alert MCP server. Before we dive in, let's take a quick look at the key ideas and tools involved.

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Sms alert is a unified communication platform for SMS, WhatsApp, RCS, and Telegram via a single REST API. It helps businesses instantly engage customers across channels from one place.

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Introduction

This guide walks you through connecting Sms alert to the Claude Agent SDK using the Composio tool router. By the end, you'll have a working Sms alert agent that can check your current sms credit balance, create a new contact group for marketing, fetch your available sender ids through natural language commands.

This guide will help you understand how to give your Claude Agent SDK agent real control over a Sms alert account through Composio's Sms alert MCP server.

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

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TL;DR

Here's what you'll learn:
  • Get and set up your Claude/Anthropic and Composio API keys
  • Install the necessary dependencies
  • Initialize Composio and create a Tool Router session for Sms alert
  • Configure an AI agent that can use Sms alert as a tool
  • Run a live chat session where you can ask the agent to perform Sms alert operations

What is Claude Agent SDK?

The Claude Agent SDK is Anthropic's official framework for building AI agents powered by Claude. It provides a streamlined interface for creating agents with MCP tool support and conversation management.

Key features include:

  • Native MCP Support: Built-in support for Model Context Protocol servers
  • Permission Modes: Control tool execution permissions
  • Streaming Responses: Real-time response streaming for interactive applications
  • Context Manager: Clean async context management for sessions

What is the Sms alert MCP server, and what's possible with it?

The Sms alert MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Sms alert account. It provides structured and secure access to your messaging platform, so your agent can send SMS, manage contacts and groups, handle templates, check balances, and create short URLs on your behalf.

  • Send and manage SMS messages: Let your agent send messages across SMS, RCS, Telegram, and WhatsApp channels using predefined templates or custom content.
  • Contact and group management: Easily create, delete, or organize contacts and groups, streamlining your customer engagement workflows.
  • Template and sender ID operations: Retrieve, create, or manage SMS templates and sender IDs to ensure consistent branding and efficient communication.
  • Credit balance and account monitoring: Ask your agent to check your current SMS credit balance and stay updated before launching campaigns or sending bulk messages.
  • Short URL generation: Automatically create short URLs for any long links you need to share, making your messages cleaner and more effective.

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

What is Composio SDK?

Composio's Composio SDK helps agents find the right tools for a task at runtime. You can plug in multiple toolkits (like Gmail, HubSpot, and GitHub), and the agent will identify the relevant app and action to complete multi-step workflows. This can reduce token usage and improve the reliability of tool calls. Read more here: Getting started with Composio SDK

The tool router generates a secure MCP URL that your agents can access to perform actions.

How the Composio SDK works

The Composio SDK follows a three-phase workflow:

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

Step-by-step Guide

Step by step09 STEPS
1

Prerequisites

Before starting, make sure you have:
  • Composio API Key and Claude/Anthropic API Key
  • Primary know-how of Claude Agents SDK
  • A Sms alert account
  • Some knowledge of Python
2

Getting API Keys for Claude/Anthropic and Composio

Claude/Anthropic API Key
  • Go to the Anthropic Console and create an API key. You'll need credits to use the models.
  • 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 dependencies

npm install @anthropic-ai/claude-agent-sdk @composio/core dotenv

Install the Composio SDK and the Claude Agents SDK.

What's happening:

  • @composio/core provides Composio integration for Anthropic
  • @anthropic-ai/claude-agent-sdk is the core agent framework
  • dotenv/config loads environment variables
4

Set up environment variables

bash
COMPOSIO_API_KEY=your_composio_api_key_here
USER_ID=your_user_id_here
ANTHROPIC_API_KEY=your_anthropic_api_key_here

Create a .env file in your project root.

What's happening:

  • COMPOSIO_API_KEY authenticates with Composio
  • USER_ID identifies the user for session management
  • ANTHROPIC_API_KEY authenticates with Anthropic/Claude
5

Import dependencies

import 'dotenv/config';
import readline from 'node:readline';
import { Composio } from '@composio/core';
import { query, type Options } from "@anthropic-ai/claude-agent-sdk";

dotenv.config();
What's happening:
  • We're importing all necessary libraries including the Claude Agent SDK and Composio
  • The dotenv.config() function loads environment variables from your .env file
  • This setup prepares the foundation for connecting Claude with Sms alert functionality
6

Create a Composio instance and Tool Router session

async function chat() {
  const { COMPOSIO_API_KEY, USER_ID } = process.env;
  if (!COMPOSIO_API_KEY || !USER_ID) {
    throw new Error('COMPOSIO_API_KEY and USER_ID required in .env');
  }

  const composio = new Composio({ apiKey: COMPOSIO_API_KEY });

  // Create Tool Router session for Sms alert
  const session = await composio.create(USER_ID, {
    toolkits: ['sms_alert'],
  });
  const mcpUrl = session?.mcp.url;
What's happening:
  • The function checks for the required COMPOSIO_API_KEY environment variable
  • We're creating a Composio instance using our API key
  • The create method creates a Tool Router session for Sms alert
  • The returned url is the MCP server URL that your agent will use
7

Configure Claude Agent with MCP

const options: Options = {
  permissionMode: 'bypassPermissions',
  mcpServers: {
    composio: {
      type: 'http',
      url: mcpUrl,
      headers: { 'x-api-key': COMPOSIO_API_KEY }
    }
  },
  systemPrompt: 'You are a helpful assistant with access to Sms alert tools via Composio.',
  maxTurns: 10,
};
What's happening:
  • We're configuring the Claude Agent options with the MCP server URL
  • permissionMode: 'bypassPermissions' allows the agent to execute operations without asking for permission each time
  • The system prompt instructs the agent that it has access to Sms alert
  • maxTurns: 10 limits the conversation length to prevent excessive API usage
8

Create client and start chat loop

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

  console.log('\nChat started. Type "exit" to quit.\n');

  let isProcessing = false;

  async function ask(prompt: string) {
    isProcessing = true;
    rl.pause();

    process.stdout.write('Claude is thinking...');
    const stream = query({ prompt, options });

    let firstChunk = true;
    for await (const msg of stream) {
      const content = (msg as any).message?.content || (msg as any).content;
      if (Array.isArray(content)) {
        for (const block of content) {
          if (block.type === 'text' && block.text) {
            if (firstChunk) {
              process.stdout.write('\r\x1b[K');
              process.stdout.write('Claude: ');
              firstChunk = false;
            }
            process.stdout.write(block.text);
          }
        }
      }
    }
    process.stdout.write('\n\n');

    isProcessing = false;
    rl.resume();
    rl.prompt();
  }

  rl.on('line', async (line) => {
    if (isProcessing) return;

    const input = line.trim();
    if (input === 'exit') {
      rl.close();
      process.exit(0);
    }
    if (input) await ask(input);
    else rl.prompt();
  });

  await ask('What can you help me with?');
}
What's happening:
  • The readline interface is created to handle user input and output
  • The query function is used to send the user's input to the agent
  • The chat loop continues until the user types 'exit' or 'quit'
9

Run the application

try {
  await chat();
} catch (error) {
  console.error(error);
  process.exit(1);
}
What's happening:
  • The chat function is the entry point for the application
  • The try-catch block is used to handle any errors that occur

Complete Code

Here's the complete code to get you started with Sms alert and Claude Agent SDK:

import 'dotenv/config';
import readline from 'node:readline';
import { Composio } from '@composio/core';
import { query, type Options } from "@anthropic-ai/claude-agent-sdk";

async function chat() {
  const { COMPOSIO_API_KEY, USER_ID } = process.env;
  if (!COMPOSIO_API_KEY || !USER_ID) {
    throw new Error('COMPOSIO_API_KEY and USER_ID required in .env');
  }

  const composio = new Composio({ apiKey: COMPOSIO_API_KEY });
  const session = await composio.create(USER_ID, {
    toolkits: ['sms_alert']
  });
  const mcp_url = session?.mcp.url;

  const options: Options = {
    permissionMode: 'bypassPermissions',
    mcpServers: {
      composio: {
        type: 'http',
        url: mcp_url,
        headers: { 'x-api-key': COMPOSIO_API_KEY }
      }
    },
    systemPrompt: 'You are a helpful assistant with access to Sms alert tools via Composio.',
    maxTurns: 10,
  };

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

  console.log('\nChat started. Type "exit" to quit.\n');

  let isProcessing = false;

  async function ask(prompt: string) {
    isProcessing = true;
    rl.pause();

    process.stdout.write('Claude is thinking...');
    const stream = query({ prompt, options });

    let firstChunk = true;
    for await (const msg of stream) {
      const content = (msg as any).message?.content || (msg as any).content;
      if (Array.isArray(content)) {
        for (const block of content) {
          if (block.type === 'text' && block.text) {
            if (firstChunk) {
              process.stdout.write('\r\x1b[K');
              process.stdout.write('Claude: ');
              firstChunk = false;
            }
            process.stdout.write(block.text);
          }
        }
      }
    }
    process.stdout.write('\n\n');

    isProcessing = false;
    rl.resume();
    rl.prompt();
  }

  rl.on('line', async (line) => {
    if (isProcessing) return;

    const input = line.trim();
    if (input === 'exit') {
      rl.close();
      process.exit(0);
    }
    if (input) await ask(input);
    else rl.prompt();
  });

  await ask('What can you help me with?');
}

try {
  await chat();
} catch (error) {
  console.error(error);
  process.exit(1);
}

Conclusion

You've successfully built a Claude Agent SDK agent that can interact with Sms alert through Composio's Tool Router.

Key features:

  • Native MCP support through Claude's agent framework
  • Streaming responses for real-time interaction
  • Permission bypass for smooth automated workflows
You can extend this by adding more toolkits, implementing custom business logic, or building a web interface around the agent.
TOOLS

Supported Tools

Every Sms alert action and event your agent gets out of the box.

Change User Password

Tool to change the password for the authenticated user account.

Get SMS Alert Balance

Tool to retrieve the current SMS credit balance.

Get SMS Delivery Report

Tool to retrieve delivery report for sent SMS messages by batch ID.

Get Group Detail

Tool to retrieve details of a specific SMS Alert group.

Get Group List

Tool to retrieve a list of SMS Alert groups.

Get Sender ID List

Tool to fetch the list of available sender IDs.

Get SMS Template List

Tool to retrieve list of SMS templates from your SmsAlert account.

Get User Profile

Tool to retrieve user login and profile information.

Create New Contact

Create New Contact

Create New Group

Tool to create a new contact group.

Create Short URL

Tool to create a short URL for a given long URL.

Create SMS Template

Tool to create a new SMS template.

Delete Contact

Tool to delete a specified contact.

Delete Group

Tool to delete a specified group.

Delete Short URL

Tool to delete an existing short URL.

Delete SMS Template

Tool to delete an existing SMS template.

Edit Contact

Tool to edit an existing contact’s details.

Edit Group

Tool to edit an existing groups name.

Update User Profile

Tool to update user account profile details.

Edit SMS Template

Tool to edit an existing SMS template.

Generate OTP

Tool to generate a one-time password (OTP).

Get Sent SMS Report

Tool to retrieve SMS campaign sent report details.

Send SMS via XML

Tool to send SMS messages using XML format for bulk sending.

FRAMEWORKS

How to build Sms alert MCP Agent with another framework

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OpenAI Agents SDK

Use Sms alert MCP with OpenAI Agents SDK

Claude Code logo

Claude Code

Use Sms alert MCP with Claude Code

Claude Cowork logo

Claude Cowork

Use Sms alert MCP with Claude Cowork

Codex logo

Codex

Use Sms alert MCP with Codex

OpenClaw logo

OpenClaw

Use Sms alert MCP with OpenClaw

Hermes logo

Hermes

Use Sms alert MCP with Hermes

CLI logo

CLI

Use Sms alert MCP with CLI

Google ADK logo

Google ADK

Use Sms alert MCP with Google ADK

LangChain logo

LangChain

Use Sms alert MCP with LangChain

Vercel AI SDK logo

Vercel AI SDK

Use Sms alert MCP with Vercel AI SDK

Mastra AI logo

Mastra AI

Use Sms alert MCP with Mastra AI

LlamaIndex logo

LlamaIndex

Use Sms alert MCP with LlamaIndex

CrewAI logo

CrewAI

Use Sms alert MCP with CrewAI

FAQ

Frequently asked questions

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

Yes, you can. Claude Agent SDK 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 Sms alert tools.

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

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