silentLabs REST API

Authentication

All requests require a Bearer token in the Authorization header. You can generate a key from your Account page.

Authorization: Bearer sk_silent_xxxxxxxxxxxxxxxxxxxxxxxx

Text to Speech

POST /api/v1/tts — Returns audio/mpeg.

curl https://YOUR-DOMAIN/api/v1/tts \
  -H "Authorization: Bearer sk_silent_..." \
  -H "Content-Type: application/json" \
  -d '{
    "text": "Hello from silentLabs.",
    "voice_id": "21m00Tcm4TlvDq8ikWAM",
    "model_id": "eleven_multilingual_v2",
    "stability": 0.5,
    "similarity_boost": 0.75,
    "style": 0
  }' --output speech.mp3

Response headers

• X-Credits-Remaining — Characters left on your plan after the call.
• Content-Type — audio/mpeg

Error codes

• 401 — Missing or invalid API key
• 402 — Not enough credits
• 403 — API access disabled or account blocked
• 400 — Bad request (missing fields, text too long)