Convert Gmail Emails to Telegram Voice Messages with GPT-5 and Inworld TTS

Description

Who’s it for

For makers, founders, and productivity nerds who want to listen to their inbox instead of reading it.
No servers, no hosting — all done with n8n, a Telegram bot, and AI/ML API (LLM + TTS).

What it does / How it works

This workflow listens for new Gmail emails, extracts the sender, subject, date, and snippet, generates a 2–3 sentence natural summary using GPT-5 via AI/ML API, then converts the text into a lifelike voice message using Inworld TTS-1-Max.
The final audio file is downloaded and instantly delivered to your Telegram via a bot.

A separate auxiliary flow captures your Telegram chat_id once, stores it in a Data Table, and the main flow reuses it every time — no hardcoding required.

High-level flow:

Gmail Trigger detects new incoming email
Code node builds a clean emailData block
AI/ML API (GPT-5) generates a natural spoken summary
AI/ML API (Inworld TTS-1-Max) converts summary → voice
Audio file is downloaded
Voice message is sent to the same Telegram chat

Requirements

A working n8n instance (self-hosted or cloud)
Gmail OAuth2 credentials
Telegram bot token from @BotFather
AI/ML API key

Base URL: https://api.aimlapi.com/v1
Supports GPT-5 and Inworld TTS-1-Max

Set up steps

Create a Telegram bot via @BotFather and add Telegram API credentials in n8n
Create an AI/ML API credential using your API key
Add Gmail OAuth2 credentials for inbox access
Import the workflow JSON
Open nodes and attach the correct credentials (no hardcoded tokens inside nodes)
Run the Telegram Trigger once and send any message to your bot — this saves your chat_id
Activate your workflow and receive your first voice-summary

How to customize

Replace GPT-5 with another LLM from AI/ML API (same schema)
Change prompt style: tone, structure, language, or verbosity
Add language selection or multi-voice support
Add filters (e.g., only important emails, only starred emails)
Log all activity to Google Sheets or a database
Add IF conditions: voice only during certain hours, weekday vs weekend rules
Add rate-limits or user allowlists
Change the voice model for different notification styles: corporate, friendly, narrator