How to integrate Lmnt MCP with Claude Code

Manage your Lmnt directly from Claude Code with zero worries about OAuth hassles, API-breaking issues, or reliability and security concerns. You can do this in two different ways: Via Composio Connect - Direct and easiest approach Via Composio SDK - Programmatic approach with more control

Lmnt logoLmnt
Api Key

Lmnt is an AI-powered audio and voice manipulation platform for creative and technical sound work. It makes generating and transforming audio fast, flexible, and accessible for every developer.

8 Tools

Introduction

Manage your Lmnt directly from Claude Code with zero worries about OAuth hassles, API-breaking issues, or reliability and security concerns.

You can do this in two different ways:

  1. Via Composio Connect - Direct and easiest approach
  2. Via Composio SDK - Programmatic approach with more control

Also integrate Lmnt with

Why use Composio?

  • Only one MCP URL to connect multiple apps with Claude Code with zero auth hassles.
  • Programmatic tool calling allows LLMs to write its code in a remote workbench to handle complex tool chaining. Reduces to-and-fro with LLMs for frequent tool calling.
  • Handling Large tool responses out of LLM context to minimize context rot.
  • Dynamic just-in-time access to 20,000 tools across 1000+ other Apps for cross-app workflows. It loads the tools you need, so LLMs aren't overwhelmed by tools you don't need.

Connecting Lmnt to Claude Code using Composio

1. Add the Composio MCP to Claude

Terminal

2. Start Claude Code

bash
claude

3. Open your MCP list

bash
/mcp

4. Select Composio and click on Authenticate

Select Composio and click Authenticate

5. This will redirect you to the Composio OAuth page. Complete the flow by authorizing Composio and you're all set.

Composio OAuth authorization page
Composio authorization complete
Ask Claude to connect to your account and authenticate via the link

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

The Lmnt MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Lmnt account. It provides structured and secure access to your voice and audio management features, so your agent can perform actions like creating voices, synthesizing speech, retrieving or updating voice profiles, and managing your audio assets on your behalf.

  • Custom voice creation and management: Direct your agent to create new voice profiles or update existing ones for use in voice synthesis and transformation.
  • Real-time speech synthesis: Instantly generate lifelike speech from text using your selected voice models for creative or technical projects.
  • Voice library retrieval: Have your agent fetch and list all available voices in your Lmnt account, making it easy to explore or switch between options.
  • Voice info review and deletion: Pull detailed information about any voice profile or let your agent remove unused voices to keep your workspace organized.
  • Account insights and status checks: Allow your agent to retrieve your Lmnt account details, ensuring smooth integration and monitoring of usage or settings.

Connecting Lmnt via Composio SDK

Composio SDK is the underlying tech that powers Rube. It's a universal gateway that does everything Rube does but with much more programmatic control. You can programmatically generate an MCP URL with the app you need (here Lmnt) for even more tool search precision. It's secure and reliable.

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 step10 STEPS
1

Prerequisites

Before starting, make sure you have:
  • Claude Pro, Max, or API billing enabled Anthropic account
  • Composio API Key
  • A Lmnt account
  • Basic knowledge of Python or TypeScript
2

Install Claude Code

bash
# macOS, Linux, WSL
curl -fsSL https://claude.ai/install.sh | bash

# Windows PowerShell
irm https://claude.ai/install.ps1 | iex

# Windows CMD
curl -fsSL https://claude.ai/install.cmd -o install.cmd && install.cmd && del install.cmd

To install Claude Code, use one of the following methods based on your operating system:

3

Set up Claude Code

bash
cd your-project-folder
claude

Open a terminal, go to your project folder, and start Claude Code:

  • Claude Code will open in your terminal
  • Follow the prompts to sign in with your Anthropic account
  • Complete the authentication flow
  • Once authenticated, you can start using Claude Code
Claude Code initial setup showing sign-in prompt
Claude Code terminal after successful login
4

Set up environment variables

bash
COMPOSIO_API_KEY=your_composio_api_key_here
USER_ID=your_user_id_here

Create a .env file in your project root with the following variables:

  • COMPOSIO_API_KEY authenticates with Composio (get it from Composio dashboard)
  • USER_ID identifies the user for session management (use any unique identifier)
5

Install Composio library

npm install @composio/core dotenv

Install the Composio TypeScript library to create MCP sessions.

  • @composio/core provides the core Composio functionality
  • dotenv loads environment variables from your .env file
6

Generate Composio MCP URL

import 'dotenv/config';
import { Composio } from '@composio/core';

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 composioClient = new Composio({ apiKey: COMPOSIO_API_KEY });

const composioSession = await composioClient.create(USER_ID, {
  toolkits: ['lmnt'],
});

const composioMcpUrl = composioSession?.mcp.url;

console.log(`MCP URL: ${composioMcpUrl}`);
console.log(`\nUse this command to add to Claude Code:`);
console.log(`claude mcp add --transport http lmnt-composio "${composioMcpUrl}" --headers "X-API-Key:${COMPOSIO_API_KEY}"`);

Create a script to generate a Composio MCP URL for Lmnt. This URL will be used to connect Claude Code to Lmnt.

What's happening

  • We import the Composio client and load environment variables
  • Create a Composio instance with your API key
  • Call create() to create a Tool Router session for Lmnt
  • The returned mcp.url is the MCP server URL that Claude Code will use
  • The script prints this URL so you can copy it
7

Run the script and copy the MCP URL

node --loader ts-node/esm generate_mcp_url.ts
# or if using tsx
tsx generate_mcp_url.ts

Run your TypeScript script to generate the MCP URL.

  • The script connects to Composio and creates a Tool Router session
  • It prints the MCP URL and the exact command you need to run
  • Copy the entire claude mcp add command from the output
8

Add Lmnt MCP to Claude Code

bash
claude mcp add --transport http lmnt-composio "YOUR_MCP_URL_HERE" --headers "X-API-Key:YOUR_COMPOSIO_API_KEY"

# Then restart Claude Code
exit
claude

In your terminal, add the MCP server using the command from the previous step. The command format is:

  • claude mcp add registers a new MCP server with Claude Code
  • --transport http specifies that this is an HTTP-based MCP server
  • The server name (lmnt-composio) is how you'll reference it
  • The URL points to your Composio Tool Router session
  • --headers includes your Composio API key for authentication

After running the command, close the current Claude Code session and start a new one for the changes to take effect.

9

Verify the installation

bash
claude mcp list

Check that your Lmnt MCP server is properly configured.

  • This command lists all MCP servers registered with Claude Code
  • You should see your lmnt-composio entry in the list
  • This confirms that Claude Code can now access Lmnt tools

If everything is wired up, you should see your lmnt-composio entry listed:

Claude Code MCP list showing the toolkit MCP server
10

Authenticate Lmnt

The first time you try to use Lmnt tools, you'll be prompted to authenticate.

  • Claude Code will detect that you need to authenticate with Lmnt
  • It will show you an authentication link
  • Open the link in your browser (or copy/paste it)
  • Complete the Lmnt authorization flow
  • Return to the terminal and start using Lmnt through Claude Code

Once authenticated, you can ask Claude Code to perform Lmnt operations in natural language. For example:

  • "Generate a podcast intro in a new voice"
  • "List all available AI voices for selection"
  • "Synthesize this script using my preferred voice"

Complete Code

Here's the complete code to get you started with Lmnt and Claude Code:

import 'dotenv/config';
import { Composio } from '@composio/core';

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 composioClient = new Composio({ apiKey: COMPOSIO_API_KEY });

const composioSession = await composioClient.create(USER_ID, {
  toolkits: ['lmnt'],
});

const composioMcpUrl = composioSession?.mcp.url;

console.log(`MCP URL: ${composioMcpUrl}`);
console.log(`\nUse this command to add to Claude Code:`);
console.log(`claude mcp add --transport http lmnt-composio "${composioMcpUrl}" --headers "X-API-Key:${COMPOSIO_API_KEY}"`);

Conclusion

You've successfully integrated Lmnt with Claude Code using Composio's MCP server. Now you can interact with Lmnt directly from your terminal using natural language commands.

Key features of this setup:

  • Terminal-native experience without switching contexts
  • Natural language commands for Lmnt operations
  • Secure authentication through Composio's managed MCP
  • Tool Router for dynamic tool discovery and execution

Next steps:

  • Try asking Claude Code to perform various Lmnt operations
  • Add more toolkits to your Tool Router session for multi-app workflows
  • Integrate this setup into your development workflow for increased productivity

You can extend this by adding more toolkits, implementing custom workflows, or building automation scripts that leverage Claude Code's capabilities.

TOOLS

Supported Tools

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

Create Voice

Creates a custom voice in LMNT by training on uploaded audio samples.

Delete Voice Info

Deletes a voice from your LMNT account.

Generate Speech With Metadata

Generates speech from text and returns JSON with base64-encoded audio and optional word-level timing metadata.

Get Account

Retrieves account information including subscription plan details and current usage statistics.

Get Voice Info

Gets metadata for a specific LMNT voice, including active status, supported languages, and plan availability.

Get Voices List

Retrieves a list of available voices from LMNT.

Synthesize Speech

Synthesizes speech from text using LMNT's AI voices.

Update Voice Info

Updates information about a specific voice in LMNT.

FAQ

Frequently asked questions

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

Yes, you can. Claude Code 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 Lmnt tools.

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

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