Text to speech,
translated & spoken in any language
Text in, MP3 URL back in under 800ms. Auto-translation across 60+ languages built in — no separate translation API needed. Pay with Bitcoin, Ethereum, USDT and more. No credit card, no KYC, no monthly deadlines.
Why developers choose SayIt
No SDKs to install, no infrastructure to manage, no surprise bills. Just text in and MP3 out - at the price other APIs charge for complexity.
Fast enough to feel instant
Text in, MP3 URL back in under 800ms. No queuing, no batch delays, no polling - your audio is ready before your user notices.
Auto-translate to 60+ languages
Write in English, output in Korean. Write in German, output in Spanish. The API detects your input language and translates before synthesising - no extra steps, no separate translation API needed.
Fine-grained speech control
Speech tags let you add emphasis, insert pauses, and whisper sections inline in your text — fine-grained control without a separate SSML document or extra API calls. See the docs for the full tag reference.
One endpoint, no SDK needed
POST your text, get back an MP3 URL. That's it. No client libraries, no auth flows, no setup - a single curl command gets you started in seconds.
Built for crypto and Web3
Pay with Bitcoin, Ethereum, USDT and more - no bank account, no credit card, no KYC. Characters never expire, so there's no pressure to use them before a monthly deadline. Ideal for DeFi apps, NFT platforms, DAOs, and any Web3 project that wants voice without the traditional payment friction.
Usage you can actually see
Characters used, requests made, and spend to date - all in one dashboard. Set quota alerts so you find out before your app does.
Five distinct voices
Each voice is optimized for different use cases. Sample them before you build.
Warm, professional, and clear. Ideal for customer-facing apps, explainer videos, and corporate content.
Bright, conversational, and friendly. Perfect for consumer apps, social content, and casual narration.
Deep, authoritative, and measured. Great for news, documentaries, and high-stakes announcement content.
Calm, balanced, and highly intelligible. Excellent for accessibility tools, screen readers, and instructional content.
Energetic, expressive, and engaging. Built for gaming, entertainment, and content that needs personality.
How it works
From zero to production voice synthesis in four straightforward steps.
Get your API key
Sign up, confirm your email, and your free API key is ready instantly. No credit card, no waiting. The free tier includes 10,000 characters.
Make your first request
POST your text to https://api.sayitapi.com/v1/tts with your SAYIT-API-KEY header. Specify a voice and output language - the API auto-translates if your text is in a different language.
Receive your audio URL
You get back a JSON response with a signed audio URL pointing to your generated MP3 (or WAV). The URL is valid for 24 hours — download it to your own storage for permanent access, or serve it directly for short-lived use cases.
Serve or download
Stream the URL directly to your users, download it to your server, embed it in your app, or pipe it into your video/podcast production workflow.
Straightforward pricing
Start free. Top up with crypto when you need more. No card, no KYC, no monthly deadlines - characters never expire.
- 10,000 characters
- 5 voices
- 60+ languages
- MP3 output
- Auto-translation
- Usage dashboard
- WAV output
- Webhooks
- Batch processing API
- CSV export
- 1,000,000 characters
- 5 voices
- 60+ languages
- MP3 + WAV output
- Auto-translation
- Usage dashboard
- Webhooks
- Batch processing API
- CSV export
- 5,000,000 characters
- 5 voices
- 60+ languages
- MP3 + WAV output
- Auto-translation
- Usage dashboard
- Webhooks
- Batch processing API
- CSV export
- 20,000,000 characters
- 5 voices
- 60+ languages
- MP3 + WAV output
- Auto-translation
- Usage dashboard
- Webhooks
- Batch processing API
- CSV export
What happens when you run out of characters?
API requests return a quota_exceeded error — no silent failures, no overage charges. We'll email you at 80% and again at 100% so you have time to top up. Top up any time from your dashboard.
Need something bigger?
Volume pricing, dedicated infrastructure, custom SLAs, and 24/7 support — email us at enterprise@sayitapi.com.
Pay with Bitcoin, Ethereum, USDT, and 100+ other cryptocurrencies via NowPayments. No bank account required. Characters never expire — top up when you need to, not on a schedule.
Built for developers
A clean, predictable REST API. POST text in, get a signed audio URL back. No SDKs required. No proprietary formats. No streaming setup.
POST /v1/tts - no separate voice listing, no streaming endpoints to manage.<emphasis>, [pause], and <whisper> for fine control.curl -X POST https://api.sayitapi.com/v1/tts \
-H "SAYIT-API-KEY: sk_live_your_api_key_here" \
-H "Content-Type: application/json" \
-d '{
"text": "Hello! This is <emphasis>SayIt API</emphasis>. [pause] Powered by SayIt API.",
"voice_id": "eve",
"language": "en",
"output_format": "mp3",
"speech_tags": true,
"speed": 1.0
}'{
"id": "tts_01hxyz...",
"status": "completed",
"audio_url": "https://api.sayitapi.com/audio/01hxyz...mp3?expires=1743260591000&sig=a3f...",
"duration_seconds": 3.24,
"characters_used": 82,
"voice_id": "eve",
"created_at": "2026-03-29T14:23:11Z"
}Built for
Wherever your project is, SayIt fits without friction.
DeFi & crypto apps
Add voice alerts, narration, and audio summaries to your DeFi dashboard or crypto project. Pay with crypto, no KYC, no bank account needed.
Indie hackers
Add voice to your SaaS product over a weekend. No vendor lock-in, no complex setup, predictable one-time costs.
Game developers
Prototype NPC dialogue instantly. Generate hundreds of spoken lines without a voice actor on call.
Accessibility tools
Make your product usable by more people. Reliable, clear speech synthesis for screen readers and audio UIs.
Voice agents
Give your LLM-powered assistant a real voice. Low-latency synthesis fits neatly into agent pipelines.
SaaS products
Ship voice notifications, audio summaries, or spoken reports without building TTS infrastructure yourself.
Ready to ship voice
in minutes?
Get your free API key and have audio in any language in under a second. Auto-translation built in - write in any language, output in any other. No credit card. No sales call. Just text in, MP3 out.
10,000 free characters • No credit card • Characters never expire