Public API v2

Voice AI infrastructure under your brand

Build transcription, subtitles, speaker labels, guardrails, realtime speech, and voice workflows through provider-neutral RealtimeVoiceKIT endpoints.

Usage pricing

$10 free usage, then metered billing

Every developer account starts with a $10 v2 API credit. Paid usage is billed through Stripe from the exact SKU consumed.

$10 free usage

Retail rates include a 20% platform margin over upstream infrastructure cost.

$0.252 / hour

Highest-accuracy pre-recorded speech-to-text for production transcripts.

$0.18 / hour

Lower-cost pre-recorded transcription with broad language coverage.

$0.54 / hour

Low-latency streaming speech-to-text for live products.

$5.40 / hour

Realtime voice-agent sessions for browser, app, and phone workflows.

Developer docs

The v2 reference only documents public, branded endpoints and uses rtvk_ bearer keys.

Explore the filtered OpenAPI schema and test v2 calls from the browser.

Create transcripts from URLs or signed uploads and retrieve text, words, utterances, and subtitles.

Inspect credit balance, itemized usage events, and Stripe checkout for metered billing.

Create an rtvk_ key, use the /v2 endpoints, and keep your customer experience fully branded.