Quick setup
Open the kRouter dashboard at http://localhost:20128
Go to Providers → click Fish Audio
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
fish-audio/<model-id>How Fish Audio billing works with kRouter
Fish Audio 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. 4 models are routable as fish-audio/<model>.
Through kRouter, Fish Audio 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 Fish Audio is a one-line model change in your client rather than a rewrite.
Fish Audio TTS. S2.1 Pro Free tier available.
Fish Audio models & pricing
These are the model ids kRouter routes to. This provider does not publish per-token rates.
| Model | Route as |
|---|---|
| S2.1 Pro Free | fish-audio/s2.1-pro-free |
| S2.1 Pro | fish-audio/s2.1-pro |
| S2 Pro | fish-audio/s2-pro |
| S1 | fish-audio/s1 |
Fish Audio links
Fish Audio FAQ
Is Fish Audio free through kRouter?
Fish Audio is pay-per-token: you bring your own API key and are billed by Fish Audio at their rates. kRouter adds nothing on top and is free and MIT-licensed.
How do I use Fish Audio with Claude Code or Cursor?
Connect Fish Audio 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 fish-audio/<model>.
Which Fish Audio models can kRouter route to?
4 models, including S2.1 Pro Free, S2.1 Pro, S2 Pro. Every one is addressed as fish-audio/<model> from any client.
What happens when Fish Audio 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.