How to integrate Typecast MCP with Codex

Codex is one of the most popular coding harnesses out there. And MCP makes the experience even better. With Typecast MCP integration, you can draft, triage, summarise emails, and much more, all without leaving the terminal or the app, whichever you prefer.

Typecast logoTypecast
Api Key

Typecast is an AI voice platform for generating expressive speech and discovering voices. Use it to create natural voiceovers and manage custom voices at scale.

7 Tools

Introduction

Codex is one of the most popular coding harnesses out there. And MCP makes the experience even better. With Typecast MCP integration, you can draft, triage, summarise emails, and much more, all without leaving the terminal or the app, whichever you prefer.

Also integrate Typecast with

Why use Composio?

Apart from a managed and hosted MCP server, you will get:

  • CodeAct: A dedicated workbench that allows GPT to write its code to handle complex tool chaining. Reduces to-and-fro with LLMs for frequent tool calling.
  • Large tool responses: Handle them to minimise 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 GPTs aren't overwhelmed by tools you don't need.

How to install Typecast MCP in Codex

Run the setup command

Run this command in your terminal to add the Composio MCP server to Codex.

Terminal

It will initiate the authentication in a browser window, authorize Codex to access your Composio account.

Composio authentication page

(Optional) Authenticate with OAuth

To authenticate manually, run the login command to open a browser window and authorize Codex to access your Composio account.

bash
codex mcp login composio

Verify the connection

Run codex mcp list to confirm Composio appears as a registered MCP server.

bash
codex mcp list

Codex App

Codex App follows the same approach as VS Code.

  1. Click ⚙️ on the bottom left → MCP Servers → + Add servers → Streamable HTTP:
  2. Fill the header and Key fields with { "x-consumer-api-key" = "ck_*******" }.
  3. The Key is the Composio API key, that you can find on dashboard.composio.dev
  4. Click on Authenticate and authorize Codex to your Composio account and you're all set.
Codex App MCP setup
  1. Restart and verify if it's there in .codex/config.toml
bash
[mcp_servers.composio]
url = "https://connect.composio.dev/mcp"
http_headers = { "x-consumer-api-key" = "ck_*******" }

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

The Typecast MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Typecast account. It provides structured and secure access to speech generation, voice discovery, voice details, and subscription usage, so your agent can create expressive audio, compose speech sequences, generate timestamps, recommend voices, and check account usage on your behalf.

  • Text to speech generation: Have your agent turn text into complete WAV or MP3 audio using an available Typecast voice.
  • Speech composition: Direct your agent to create one audio file from an ordered mix of spoken passages and pauses.
  • Timed speech alignment: Instruct your agent to generate speech with word timestamps, character timestamps, or both for captions and synchronized experiences.
  • Voice discovery and recommendations: Let the agent list available built-in and custom voices, filter them by traits and use cases, recommend matches from a natural-language description, and review voice details, models, and emotions.
  • Plan and usage checks: Have your agent check your Typecast plan, credit usage, concurrency limit, and custom voice allowance.

Conclusion

You've successfully integrated Typecast with Codex using Composio's MCP server. Now you can interact with Typecast directly from your terminal, VS Code, or the Codex App using natural language commands.

Key benefits of this setup:

  • Seamless integration across CLI, VS Code, and standalone app
  • Natural language commands for Typecast operations
  • Managed authentication through Composio
  • Access to 20,000+ tools across 1000+ apps for cross-app workflows
  • CodeAct workbench for complex tool chaining

Next steps:

  • Try asking Codex to perform various Typecast operations
  • Explore cross-app workflows by connecting more toolkits
  • Build automation scripts that leverage Codex's AI capabilities
TOOLS

Supported Tools

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

Compose Speech

Generate one audio file from an ordered sequence of speech and pause segments.

Generate Speech

Generate a complete WAV or MP3 audio file from text using a Typecast voice.

Generate Speech With Timestamps

Generate speech plus word, character, or both alignment timestamp arrays.

Get Subscription

Get the connected Typecast API plan, credit usage, concurrency limit, and custom-voice allowance.

Get Voice

Get one voice's metadata, supported models, and available emotions by voice ID.

List Voices

List available built-in and owned custom Typecast voices, optionally filtered by speech model, gender, age, use case, and voice type.

Recommend Voices

Find and rank Typecast voices that match a natural-language description.

FAQ

Frequently asked questions

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

Yes, you can. Codex 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 Typecast tools.

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

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