Msg91 MCP server for AI agents and assistants

Securely connect your AI agents and chatbots (Claude, ChatGPT, Cursor, etc) with Msg91 MCP or direct API to send SMS, trigger WhatsApp notifications, automate email alerts, and manage campaigns through natural language.

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Api Key

MSG91 is a cloud communication platform for sending SMS, WhatsApp, Email, and Voice notifications. It lets businesses securely reach customers across multiple channels from one unified API.

8 Tools

Try Msg91 now

Type what you want done — sign in and watch it run live in the Tool Router playground.

TOOL ROUTER PLAYGROUND
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TOOLS

Supported Tools

Every Msg91 action and event your agent gets out of the box.

Create User Events

Create and track user events in MSG91 Segmento for customer behavior analysis and segmentation.

Get Event Types

Retrieves all event types configured in MSG91 Segmento.

Get Failed Events

Retrieve failed user events from a MSG91 Segmento campaign.

List Campaigns

Tool to list all campaigns in Segmento.

Resend OTP

Resend OTP to the same mobile number via text message or voice call.

Send OTP

Tool to send OTP (One-Time Password) to a mobile number using a pre-configured MSG91 template.

Send SMS via Flow (V5)

Send SMS messages using pre-defined templates via MSG91 Flow API v5.

Verify OTP

Tool to verify an OTP (One-Time Password) sent to a mobile number.

SETUP GUIDE

Connect Msg91 MCP Tool with your Agent

1

Install Composio

typescript
npm install @composio/core ai @ai-sdk/mcp @ai-sdk/openai
Install the Composio SDK and your agent framework
2

Create a session with MCP enabled

typescript
import { Composio } from "@composio/core";

const composio = new Composio();
const { mcp } = await composio.create("your-user-id", {
  toolkits: ["msg91"],
  mcp: true,
});
Create a session scoped to Msg91 and read its MCP URL and headers
3

Connect your agent to the MCP server

typescript
import { createMCPClient } from "@ai-sdk/mcp";
import { openai } from "@ai-sdk/openai";
import { generateText, stepCountIs } from "ai";

const client = await createMCPClient({
  transport: { type: "http", url: mcp.url, headers: mcp.headers },
});

const { text } = await generateText({
  model: openai("gpt-5.6-sol"),
  tools: await client.tools(),
  prompt: "Send an SMS to confirm today's appointment",
  stopWhen: stepCountIs(10),
});

console.log(text);
await client.close();
Pass the session's MCP URL and headers to your agent and run a Msg91 request
SETUP GUIDE

Connect Msg91 API Tool with your Agent

1

Install Composio

typescript
npm install @composio/core @composio/openai openai
Install the Composio SDK, the OpenAI provider, and the OpenAI SDK
2

Create a Composio session

typescript
import OpenAI from "openai";
import { Composio } from "@composio/core";
import { OpenAIResponsesProvider } from "@composio/openai";

const composio = new Composio({ provider: new OpenAIResponsesProvider() });
const client = new OpenAI();

const session = await composio.create("your-user-id", { toolkits: ["msg91"] });
const tools = await session.tools();
Initialize Composio with the OpenAI Responses provider and create a session scoped to Msg91
3

Run Msg91 tools with your agent

typescript
let response = await client.responses.create({
  model: "gpt-5.6-sol",
  tools,
  input: [{ role: "user", content: "Send an SMS to confirm today's appointment" }],
});

while (response.output.some((o) => o.type === "function_call")) {
  const outputs = await composio.provider.handleToolCalls(session, response.output);
  response = await client.responses.create({
    model: "gpt-5.6-sol",
    tools,
    previous_response_id: response.id,
    input: outputs,
  });
}

console.log(response.output_text);
Send a request, execute the Msg91 tool calls through the session, and print the final answer

Why Use Composio?

AI Native Msg91 Integration

  • Supports both Msg91 MCP and direct API based integrations
  • Structured, LLM-friendly schemas for reliable tool execution
  • Rich coverage for sending, receiving, and querying messages across SMS, Email, WhatsApp, and Voice

Managed Auth

  • Built-in API Key storage with secure handling
  • Central place to manage, scope, and revoke Msg91 credentials
  • Per user and per environment keys instead of hard-coded values

Agent Optimized Design

  • Tools are tuned using real Msg91 error and delivery rates for robust automation
  • Detailed execution logs so you always know which messages were sent, when, and by whom

Enterprise Grade Security

  • Role-based access controls so you control which agents and users can send messages
  • Scoped, least privilege access to Msg91 APIs
  • Full audit trail of messaging actions to support compliance needs

Rolling this out across your team?

Give your team centralized access control across every framework with Composio’s MCP Gateway.

EXPLORE MCP GATEWAY
FAQ

Frequently asked questions

Yes, Msg91 requires you to configure your own API key credentials. Once set up, Composio handles secure credential storage and API request handling for you.

Yes! Composio's Tool Router enables agents to use multiple toolkits. Learn more.

Yes. Composio is SOC 2 Type II compliant and is built to keep your Msg91 connection and credentials secure. OAuth tokens and API keys are encrypted, and sensitive customer data is protected at rest and in transit.

Composio also undergoes independent security testing and continuously monitors its systems for security threats. You can review the latest reports and policies in the Composio Trust Center.

Composio maintains and updates all toolkit integrations automatically, so your agents always work with the latest API versions.

Create the key in your Msg91 account settings, then paste it once on Composio's connection page. Composio stores it encrypted and uses it only for the Msg91 actions your agent runs. Nobody else in your workspace can read it, and you can revoke it inside Msg91 at any time.

When you connect a Msg91 account through Composio, every action runs under that account, so anything the agent creates, sends, or changes shows up in Msg91 as done by you. Keep an approval step in your prompt for actions with side effects, such as sending or deleting, and have the agent draft first.

Whatever the credentials you connect allow inside Msg91. If Msg91 lets you scope a key to specific permissions, create a scoped one so the agent can only do what you intend. You can revoke the key inside Msg91 at any time.

Yes. Composio supports multiple connected accounts for the same app, and that works in Claude, ChatGPT, or any other assistant you connect through Composio. Give each Msg91 connection a name such as work or personal, and the assistant uses the one you mention in the request. Each account keeps its own credentials and nothing is merged.

The connection stops working the moment Msg91 rejects the old key. Create a new key in Msg91 and reconnect the account from the Composio dashboard or by asking your agent to reconnect Msg91. Nothing else changes.

Composio's free Hobby plan includes 100,000 tool calls per month with no credit card, which covers most personal Msg91 use. Paid plans add higher limits and team features. Your Msg91 plan and its API limits still apply as usual.

Built-in connectors usually give one AI access to a limited set of apps. Many people use Composio because it lets their AI connect to more apps than it normally supports, or connect to multiple accounts for the same app (e.g. connect Claude to multiple Msg91 accounts).

With Composio, you connect Msg91 once and then use it across different AI assistants without setting it up separately in each one. Connect your apps to Composio once, then connect Composio to whichever AI you use, whether that's Claude, ChatGPT, Hermes, or your own custom assistant.

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