Show HN: Use your OpenAI subscription to create audiobooks

01Connect your AI In Codex, open Settings → Plugins → Add MCP server. Choose Streamable HTTP and paste this server address. Save, then choose Authenticate and connect your PDF TO MP3 account. 02Add your speech key This key pays for speech only. Enable billing in the Gemini console to improve reliability. Free keys can hit rate limits or “high demand” errors.