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How to connect Msg91 to Claude

Connect Claude Web, Desktop and Cowork to Msg91 MCP. Send sms to new customer leads, list all ongoing marketing campaigns, and more using natural language, with authentication handled for you.

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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

Introduction

Claude is Anthropic's AI assistant, available on the web, in the desktop app, and on mobile. Cowork is its agent for knowledge work, and it runs on all of those surfaces too. Connected to your apps, Claude can work with your files and services to accomplish complex tasks on your behalf.

This guide walks you through the easiest and most secure way to connect your Msg91 account to Claude via Composio Connect, enabling it to send SMS to new customer leads, list all ongoing marketing campaigns, fetch failed event logs from last week, and more such actions on your behalf without compromising your account security.

Setup is the same on Claude Web, Desktop, and Cowork, and you only need to do it once. The connector is tied to your account, so it's available in all three.

Also integrate Msg91 with

Claude CodeOpenAI Agents SDKClaude Agent SDKCodexOpenClawHermesAtomic AgentGoogle ADKLangChainVercel AI SDKMastra AILlamaIndexCrewAIPydantic AIAutoGen

Connecting Msg91 to Claude Web, Desktop, and Cowork

Two ways to add the Composio connector. Pick whichever you prefer.

1. Add with one click

Click the button. Claude opens with the Composio connector filled in. Click Add, then go to step 2.

Add to Claude

Add manually

In Claude Desktop, click Customize in the left sidebar, then select Connectors and click the + icon at the top.

Claude Desktop connectors screen with Add custom connector selected

Click Add custom connector and paste in the Composio MCP server URL:

bash
https://connect.composio.dev/mcp
Add custom connector dialog with Composio MCP server URL

2. Authorize in your browser

Click Connect. You'll be redirected to a browser window where you can authorize Composio to continue.

Composio authorization screen for Claude Web, Desktop, and Cowork

3. Connect your Msg91 account

Back in Claude, ask it to connect to Msg91 or give it any Msg91-related task.

For example, ask Claude to:

  • "Send SMS to new customer leads"
  • "List all ongoing marketing campaigns"
  • "Fetch failed event logs from last week"

It will prompt you to authenticate and authorize access.

That's it. Composio's tools are now available in Claude, and your Msg91 account is ready to use.

What is the Msg91 Claude Connector, and what's possible with it?

The Msg91 MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Msg91 account. It provides structured and secure access to your SMS, campaign, and user event data, so your agent can perform actions like sending SMS messages, tracking campaigns, recording user events, and monitoring delivery failures on your behalf.

  • Send personalized SMS messages: Let your agent dispatch SMS messages to one or multiple recipients, making customer outreach fast and automated.
  • List and track marketing campaigns: Instantly retrieve an overview of all your ongoing or past campaigns, including support for pagination.
  • Create and log user events: Easily record user actions and behaviors in Msg91 Segmento so you can automate engagement and track interactions.
  • Retrieve available event types: Ask your agent to list all defined event types to keep your analytics and segmentation organized and up to date.
  • Monitor failed events for campaigns: Quickly inspect which events failed validation for any campaign, helping you troubleshoot and optimize your communication workflows.

Troubleshooting

1. Why does Claude not use the Composio connector for Msg91?

The connector can show as connected, but Claude must use it in each Msg91 conversation.

  • Click + at the lower left of the chat, or type /.
  • Hover Connectors.
  • Turn on Composio.
  • Ask Claude to connect to Msg91 again.

2. Why does Claude show an MCP server error before Msg91 connects?

Claude can show Couldn't reach the MCP server or Authorization with the MCP server failed when you add the connector for Msg91.

  • Check that the connector URL is https://connect.composio.dev/mcp.
  • Connectors run from Anthropic's cloud, so your device network is usually not the problem.
  • Add the connector again from Customize > Connectors, then ask Claude to connect Msg91.
  • If it fails again, send the error and the ofid_ reference id to support@composio.dev.

3. Why does the Msg91 authorization link not work?

The Composio connector is one server. Your Msg91 account connects separately when Claude asks for it.

  • If the browser does not open, or the link expires, ask Claude to retry the Msg91 connection.
  • Composio creates a fresh Msg91 authorization link.
  • Open that link in your browser and finish the Msg91 sign-in.

4. Why do Msg91 actions fail after they worked before?

The Msg91 connection can expire or lose permission.

  • Ask Claude to inspect the Msg91 connection.
  • If the connection is unhealthy, disconnect it when Claude prompts you.
  • Reconnect the Msg91 account and retry the action.
  • If Claude shows a permission prompt, approve it before Claude changes data in Msg91.
  • If the action still fails with a permission error, check that the connected account has that permission in Msg91 itself.

5. How do I switch to a different Msg91 account?

Claude can manage the Msg91 connection for you.

  • Ask Claude to disconnect or delete the current Msg91 account.
  • Ask Claude to connect Msg91 again.
  • Open the new Composio authorization link for Msg91.
  • Sign in with the other Msg91 account in the browser.
  • After the account connects, ask Claude to retry the Msg91 task.

6. Why is my Msg91 connection missing in Claude Desktop or on a Team plan?

The connector belongs to your Claude account, so your Msg91 connection works in Claude Web, Desktop, and Cowork.

  • In Claude Desktop, open Customize > Connectors.
  • Next to Composio, click ⋮ and click Clear cache.
  • If Msg91 tools still do not appear, click ⋮, disconnect, remove the connector, and add it again.
  • On Team or Enterprise, an Owner or Primary Owner must enable the connector before you can connect Msg91.
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.

FRAMEWORKS

How to build Msg91 MCP Agent with another framework

Claude Code logo

Claude Code

Use Msg91 MCP with Claude Code

OpenAI Agents SDK logo

OpenAI Agents SDK

Use Msg91 MCP with OpenAI Agents SDK

Claude Agent SDK logo

Claude Agent SDK

Use Msg91 MCP with Claude Agent SDK

Codex logo

Codex

Use Msg91 MCP with Codex

OpenClaw logo

OpenClaw

Use Msg91 MCP with OpenClaw

Hermes logo

Hermes

Use Msg91 MCP with Hermes

Atomic Agent logo

Atomic Agent

Use Msg91 MCP with Atomic Agent

Google ADK logo

Google ADK

Use Msg91 MCP with Google ADK

LangChain logo

LangChain

Use Msg91 MCP with LangChain

Vercel AI SDK logo

Vercel AI SDK

Use Msg91 MCP with Vercel AI SDK

Mastra AI logo

Mastra AI

Use Msg91 MCP with Mastra AI

LlamaIndex logo

LlamaIndex

Use Msg91 MCP with LlamaIndex

CrewAI logo

CrewAI

Use Msg91 MCP with CrewAI

Pydantic AI logo

Pydantic AI

Use Msg91 MCP with Pydantic AI

AutoGen logo

AutoGen

Use Msg91 MCP with AutoGen

FAQ

Frequently asked questions

With a standalone Msg91 MCP server, the agents and LLMs can only access a fixed set of Msg91 tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Msg91 and many other apps based on the task at hand, all through a single MCP endpoint.

Yes, you can. Claude Cowork 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 Msg91 tools.

Yes, absolutely. You can configure which Msg91 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 Msg91 data and credentials are handled as safely as possible.

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