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Text to Speech API

Fully local speech across a broad language catalog

Convert multilingual text into MP3 speech with local Piper, RHVoice, and eSpeak NG engines—without sending text to an external AI provider.

POST/api/text-to-speech-api/v1/generate-speech
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Text to Speech API illustration
Starting atFree

What it does

Local multilingual speech with an inspectable voice catalog

Use GET /voices to discover every language and voice currently installed on the server. Then POST /generate-speech with text, a BCP 47 language code such as en-US, hr-HR, or mk-MK, and optionally a voice ID returned by the catalog. If voice is omitted, the service chooses the highest-priority local voice for that language. English defaults to piper:en-us-lessac-medium, Croatian to rhvoice:karmela, and Macedonian to rhvoice:suze. Other installed RHVoice voices are preferred before the broad eSpeak NG fallback. Audio is generated on this server, converted to MP3, and deleted 3,600 seconds after creation. No submitted text or audio is sent to OpenRouter or another external TTS provider.

Fully Local Generation

Runs Piper, RHVoice, and eSpeak NG on the AI-tools server without an external TTS API.

Live Voice Catalog

Exposes the currently installed languages, engines, voice IDs, quality types, and defaults.

Priority Native Voices

Uses Piper Lessac for English, RHVoice Karmela for Croatian, and RHVoice Suze for Macedonian by default.

One-Hour MP3 Links

Returns a non-guessable HTTPS MP3 URL that becomes unavailable and is deleted after one hour.

Stable endpoints

One service, documented request contracts

POST
/api/text-to-speech-api/v1/generate-speech

Generate an MP3 locally using the selected language and optional voice ID.

GET
/api/text-to-speech-api/v1/voices

Return the live local catalog grouped by language, including voice IDs, engines, quality types, and the default voice for each language.

Simple monthly plans

Start free, then scale the same API token

Plus includes 10× the Free quota. Pro includes 500× the Free quota.

Free

Free

Free access for testing and light usage.

  • 200 API requests per month
  • Service-scoped API token
  • Interactive documentation and live tester
  • Community availability
Start free
Most popular

Plus

5.99 EUR/month

10× the Free request quota.

  • 2,000 API requests per month
  • Service-scoped API token
  • Interactive documentation and live tester
  • Standard production usage
Choose Plus

Pro

19.99 EUR/month

500× the Free request quota for production workloads.

  • 100,000 API requests per month
  • Service-scoped API token
  • Interactive documentation and live tester
  • High-volume production usage
Choose Pro