Quick setup
Open the kRouter dashboard at http://localhost:20128
Go to Providers → click Inworld TTS
Paste your API key, click Save
Test the connection
Use in your IDE
Point any OpenAI-compatible client at kRouter using your local API key.
# Endpoint
http://localhost:20128/v1
# API key (from Dashboard → API Keys)
sk-krouter-XXXX
# Model
inworld/<model-id>How Inworld TTS billing works with kRouter
Inworld TTS is pay-per-token. You bring your own API key and kRouter routes to it, so you keep your own rate limits and billing relationship. kRouter authenticates it via apikey. 2 models are routable as inworld/<model>.
Through kRouter, Inworld TTS serves text-to-speech, exposed on /v1/audio/speech. Requests reach it through the same local OpenAI-compatible endpoint as every other provider, so switching to or from Inworld TTS is a one-line model change in your client rather than a rewrite.
Free tier: 40 minutes/month TTS. Paid: TTS-1.5 Mini $0.01/min ($15/1M chars), TTS-1.5 Max $0.025/min ($30/1M chars). 270+ voices, 15 languages.
Inworld TTS models & pricing
These are the model ids kRouter routes to. This provider does not publish per-token rates.
| Model | Route as |
|---|---|
| Inworld TTS 1.5 Mini ($0.01/min) | inworld/inworld-tts-1.5-mini |
| Inworld TTS 1.5 Max ($0.025/min) | inworld/inworld-tts-1.5-max |
Inworld TTS links
Inworld TTS FAQ
Is Inworld TTS free through kRouter?
Inworld TTS is pay-per-token: you bring your own API key and are billed by Inworld TTS at their rates. kRouter adds nothing on top and is free and MIT-licensed.
How do I use Inworld TTS with Claude Code or Cursor?
Connect Inworld TTS in the kRouter dashboard, then point your tool at kRouter's local endpoint (http://localhost:20128/v1) with a kRouter API key. Any OpenAI-compatible client works, and models are addressed as inworld/<model>.
Which Inworld TTS models can kRouter route to?
2 models, including Inworld TTS 1.5 Mini ($0.01/min), Inworld TTS 1.5 Max ($0.025/min). Every one is addressed as inworld/<model> from any client.
What happens when Inworld TTS is rate limited?
kRouter detects the limit, parks that account until its real reset time, and fails over to your next connected account or provider — so the request still completes instead of erroring.