oto

oto is an MCP app that turns text into speech. From any MCP host (e.g. Claude), you ask it to read the current text aloud — it converts the text to audio with the OpenAI text-to-speech API and renders an audio player right in the conversation.

What it does

• Text to audio — a text_to_speech tool takes the current text and generates an audio file via OpenAI TTS.

• Inline player — the generated audio shows up as an interactive player UI inside the MCP host: play it, close it.

• History — every audio you generate is saved; browse and replay your previous generations.

• Authenticated — the server requires sign-in before use. Auth is handled by Supabase (used exclusively for authentication).

Related MCP server: Open AI Text To Speech1 MCP Server

Stack

• TypeScript end to end.

• MCP server (remote, Streamable HTTP) with an embedded UI for the audio player.

• OpenAI API for text-to-speech generation.

• Supabase for authentication only.

• Railway for hosting the backend, the database, and object storage for the audio files.

Status

Early exploration — currently investigating the stack and setting up project configuration.