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1

Get an API key

Create a key in the Geko console. Keys look like sk-tokay-…. Keep it server-side — treat it like a password. New accounts get $1.00 of free credits.
2

Make a sound

Pick whichever feels natural — all three do the same thing.
3

Play it

That’s it. hello.wav is 24 kHz, 16-bit PCM mono.

Install the SDK

The SDK has no runtime dependencies and ships both ESM and CommonJS with types. Requires Node 20+ (or Deno / Bun / modern browsers).

What next

Pick a voice

Browse the catalog and audition each voice.

Latency vs. quality

Tune the nfe dial for speed or fidelity.

Use it in your app

Server-side Next.js / Express integration, done right.

Errors & retries

Handle failures cleanly in production.
First call slow? The GPU backend scales to zero when idle, so a cold start can take tens of seconds; subsequent calls are fast. The SDK’s default 120 s timeout accounts for this.