Eligibility and authentication
API access requires an active paid plan and a generated API key. Keep your keys secret — anyone with your key can incur charges and submit content as you.
Rate limits and fair use
Each plan has documented per-minute and per-day rate limits. Sustained abuse, scraping behaviour, or attempts to circumvent limits may result in throttling or suspension.
Acceptable use
API usage is bound by our Acceptable Use Policy and AI Usage Policy. You are responsible for content submitted by your end users.
Caching and storage
You may cache generated audio to reduce duplicate calls. You may not resell raw API output as a competing image-to-speech API.
Attribution
Attribution is not required for end-user audio but is appreciated. "Powered by ImageToSpeech" badges and brand assets are in our Press Kit.
Changes
We may evolve API surfaces during beta. Breaking changes will be announced with at least 30 days' notice once the API is GA.
Contact
Developer support: api@imagetospeech.org.