What's free
250,000 characters/month TTS (~6 hours of audio)
Rate limits
Tiered endpoints for different text lengths; specific caps not documented
The catch
Commercial use allowed, but free-plan users must attribute Unreal Speech with a link when publishing audio. First-party REST endpoints. No credit card required.
Quickstart
First-party API — not OpenAI-compatible, so there is no drop-in base URL. The exact endpoint is in the official docs; authenticate with your API key in the Authorization: Bearer header.
curl -H "Authorization: Bearer $API_KEY" \
https://<api-base-url>/<endpoint>…or in Python:
import os, requests
r = requests.post(
"https:///",
headers={"Authorization": f"Bearer {os.environ['API_KEY']}"},
json={},
)
print(r.json()) Appears in
Free LLM APIs with no credit cardFree LLM APIs for commercial useFree multimodal LLM APIsNo credit cardSpeech (STT/TTS)
Change history
How this free tier has changed since we started tracking it (2026-07-30) — generated from the git history of providers.json.
- 2026-08-14 Updated the catch, card requirement
- 2026-07-30 Added to the hub