Studio-quality voice, at a fraction of studio prices
Five AI audio tools behind one key — text to speech, transcription, sound effects, noise removal and voice changing. 10,000+ voices across 32 languages, from $0.023 per 1,000 characters.
What you get
Text to speech
Natural, human-like voices with full control over emotion, style, speed and output format. 32 languages including Japanese, Spanish, Hindi and Arabic.
Speech to text
Accurate transcription that returns the text, the detected language and the exact duration — so you always know what you were billed for.
Sound effects
Describe a sound, get audio back. Footsteps on gravel, a door slamming, rain on a tin roof — generated fresh, nothing to license.
Noise removal
Strip background noise, echo and interference from a recording and keep clean speech. Measurably improves transcription accuracy downstream.
Voice changer
Keep the words and the delivery of a recording, replace the speaker's voice.
Billed by what you use
Characters for speech, seconds for transcription. A 5-character request does not cost the same as a 20,000-character one.
Two headers and you are running
Your RapidAPI key is applied automatically — there is no second credential to manage. Copy a snippet from the listing in JavaScript, Python, PHP, Java, Go, Ruby, C#, Swift or Shell.
import requests
url = "https://text-to-speech-tts-speech-to-text-stt-by-smartapihub.p.rapidapi.com/tts"
headers = {
"x-rapidapi-key": "YOUR_RAPIDAPI_KEY",
"x-rapidapi-host": "text-to-speech-tts-speech-to-text-stt-by-smartapihub.p.rapidapi.com",
}
r = requests.post(url, headers=headers, json={
"text": "Hello from SmartAPIHub.",
"voiceId": "2002",
})
# the response body is the audio itself
open("speech.mp3", "wb").write(r.content)What the same work costs going direct
| What | Compared with | Their price | SmartAPIHub | Relative cost | You save |
|---|---|---|---|---|---|
| Text to speechper 1,000 characters | ElevenLabs Multilingual v2 | $0.10 | $0.0249 | −75% | |
| Text to speechper 1,000 characters | ElevenLabs Flash / Turbo | $0.05 | $0.0249 | −50% | |
| Speech to textper audio hour | ElevenLabs Scribe | $0.22 | $0.0998 | −55% | |
| Speech to textper audio hour | Deepgram Nova-3 | $0.462 | $0.0998 | −78% | |
| Sound effects & audioper minute | ElevenLabs | $0.12 | $0.0399 | −67% |
Plans for Voice API
Billed monthly through RapidAPI. Cancel any time.
- 10,000 characters of speech
- 17 min of transcription
- 2.5 min of audio effects
- 1,000 requests / hour
- 200,000 characters of speech
- 50 hours of transcription
- 125 min of audio effects
- Hard limits — no surprise overage
- 830,000 characters of speech
- 208 hours of transcription
- 542 min of audio effects
- Overage from $0.00025/unit
- 3,475,000 characters of speech
- 867 hours of transcription
- 2,250 min of audio effects
- Best per-unit rate
Voice API FAQ
How many voices and languages are there?
Over 10,000 voices across 32 languages, including Japanese, Spanish, Hindi and Arabic. You pick a voice by its 4-digit ID and can tune stability, similarity, style, speaker boost and speed per request.
What audio formats can I get back?
MP3 at several bitrates and raw PCM. mp3_44100_128 is the full-quality default; mp3_22050_32 is roughly a quarter of the size, which matters because response bytes count toward your RapidAPI bandwidth allowance.
How is text to speech billed?
Per character, not per request. One unit is 10 characters, rounded up, so a 66-character request costs 7 units rather than the same as a 20,000-character one. Transcription is billed per 5 seconds of audio, and sound effects and audio processing per 5 seconds of output.
Is the audio quality actually the same as going direct?
For text to speech, yes — the same underlying voice models, so the output is what you would get from a premium voice vendor. For transcription the accuracy is very good but not identical to the most expensive dedicated model; if you need absolute best-in-class word error rate on difficult audio, go direct.
Can I use the audio commercially?
Yes. Generated speech and sound effects are yours to use in commercial work, with nothing to clear and no attribution required.
Start with the free Voice API tier
No credit card required. Subscribe on RapidAPI and make your first call in under a minute.