VAPI•8mo ago

TTS Alternative Providers

Was wondering if it is possible to connect a TTS provider thats not currently out of the box supported by VAPI. Looking at Minimaxi as I experimented and thought it was pretty good for my use case.

Vapi Support BotAPP•5/20/25, 8:42 AM

Currently, Vapi does not provide a documented way to directly integrate a custom TTS provider (like Minimaxi) if it is not already supported out of the box. The platform supports bringing your own models for transcription and LLMs, but there is no mention of a similar mechanism for TTS. If you need this feature, I recommend reaching out to Vapi support to discuss your use case or request this as a feature.

Sources:

⤵️ Mention @Vapi Support Bot for follow-ups 🐥

then-purpleOP•5/20/25, 4:27 PM

Would like to request this as a feature

extreme-purple•5/20/25, 8:33 PM

Yes, you can integrate a custom TTS provider like Minimaxi with Vapi by setting up your own TTS server and configuring your assistant to use it as a custom voice provider.

then-purpleOP•5/21/25, 3:53 AM

oh its this?

https://docs.vapi.ai/customization/provider-keys

Provider Keys | Vapi

then-purpleOP•5/21/25, 7:27 AM

So found it.

So the server object will be the POST Body? What about the headers etc.

VapiAPP•5/21/25, 11:49 AM

Look for custom voice at https://api.vapi.ai/api you will get the details.

then-purpleOP•5/21/25, 1:53 PM

oh alright thanks!

VapiAPP•5/22/25, 2:43 AM

Glad the issue was resolved. Please reach out to us if you have any other questions regarding this issue

then-purpleOP•5/30/25, 1:19 AM

Hey sorry so when I make the API call, still not sure where to pass the body?

shows the request example bht where do i place the body?

VapiAPP•5/31/25, 1:36 AM

Your request will look something like this:

curl -X POST https://api.vapi.ai/assistant \
     -H "Authorization: Bearer " \
     -H "Content-Type: application/json" \
     -d '{
  "voice": {
    "provider": "custom-voice",
    "server": {}
  }
}'

curl -X POST https://api.vapi.ai/assistant \
     -H "Authorization: Bearer " \
     -H "Content-Type: application/json" \
     -d '{
  "voice": {
    "provider": "custom-voice",
    "server": {}
  }
}'

You can also review this reference guide and build a template to gain a better understanding of the request

then-purpleOP•5/31/25, 8:45 AM

as in the body for the server under voice?

ie. the servier is an api and i need pass a body

VapiAPP•6/2/25, 9:43 PM

Hey Timmy, you can check out this guide on how to set up custom text-to-speech with VAPI, and let me know your feedback on this document. After Your feedback, I'll deploy this document onto VAPI's official docs. https://docs.google.com/document/d/1qDABb5cf3Nes4TG_2PMLltafeQHzZbmA/edit?usp=sharing&ouid=115901852683452240353&rtpof=true&sd=true

then-purpleOP•6/7/25, 4:48 AM

Thanks will try it out

curl -X POST https://api.vapi.ai/assistant \ -H "Authorization: Bearer " \ -H "Content-Type: application/json" \ -d '{ "voice": { "provider": "custom-voice", "server": {} } }'

TTS Alternative Providers

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