TTS API for WhatsApp (voice messages & bots)
Add natural voice to your WhatsApp bot or workflow: generate MP3 narration with the free eidosSpeech TTS API, then send it as a voice message. Free to start, no credit card.
Why add voice to WhatsApp
Voice messages are personal and quick to consume - which is why many WhatsApp bots, broadcast lists, and support flows are adding them. Instead of recording audio by hand, you generate it on demand with a TTS API. The same script can be sent as text, voice, or both, in any language your audience speaks.
How the integration works
- Call
POST /api/v1/ttswith your text, voice, and format (API reference). - Receive an MP3 URL or file - no preprocessing needed.
- Send it as a media message through your WhatsApp provider (Business API, Twilio, or similar).
Use cases that work today
- Order & delivery updates - read out tracking status in the customer's language.
- Support bots - answer common questions with a friendly voice note.
- Broadcasts - send voice announcements to a list without recording each one.
- Language learning - send pronunciation practice audio (Indonesian, Spanish, Japanese, and more).
Getting started
Register for a free API key (no credit card), grab the Python example, and generate your first voice message in minutes. For the full comparison of free providers, see best free TTS APIs 2026.
WhatsApp TTS API FAQ
Can I send WhatsApp voice messages with a TTS API?
Yes. Generate an MP3 with the eidosSpeech TTS API, then deliver it through WhatsApp Business API, Twilio, or any provider that accepts media URLs. The pattern is the same for broadcast messages and one-on-one replies.
Is the WhatsApp TTS API free?
The TTS part is free to start - no credit card, with a free daily tier. WhatsApp delivery itself is billed by your messaging provider (e.g. Twilio or WhatsApp Business API), not by eidosSpeech.
What languages does it support for WhatsApp voice notes?
75+ languages with 1,200+ voices, including English, Indonesian, Spanish, Hindi, Arabic, and more. Pick the voice your audience expects.
Can I automate customer support voice replies?
Yes. Combine the TTS API with a chatbot: when the bot needs to answer verbally, it calls the API, gets an MP3, and sends it as a voice message. See the API docs for the request format.