Nemesys Labs

Nemesys Labs Text-to-Speech Platform is a free AI-powered speech synthesis service that converts written text into natural-sounding speech via a simple HTTP API. Designed for quick integration, it supports multiple voices and languages, enabling developers to generate audio on demand with a single request. The platform emphasizes ease of use, rapid results, and broad language coverage for applications such as podcasts, voice assistants, e-learning, and accessibility tools.

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How to Use Nemesys Labs Text-to-Speech

1. Prepare your request: provide the text you want to convert and optionally select a voice.
2. Send a POST request to the API endpoint: https://api.nemesyslabs.com/api/v1/text-to-speech with a JSON body.
3. Receive audio: the API returns an MP3 audio file containing the spoken text. You can then save or stream the audio in your application.

Example Request

curl --location 'https://api.nemesyslabs.com/api/v1/text-to-speech' \
 --header 'Content-Type: application/json' \
 --header 'Authorization: Bearer ••••••' \
 --data '{ 
 "text": "Welcome to Nemesys Labs, we try our best to democratize state-of-the-art speech synthesis like this one, have fun!", 
 "voiceId": "Alice" 
 }'

Response: 200 with an MP3 audio file.

Voices and Languages

• Supports over 21 languages with multiple voices, including: Eva, Rafael, Matthew, Alice, Alex, Michael, Jack, and more.

Endpoints and Parameters

• Endpoint: POST /api/v1/text-to-speech
• Required: text (up to 50,000 characters, varies by plan)
• Optional: voiceId (defaults to Alice)
• Response: MP3 audio file

Voice Options

• Available voices: Eva, Rafael, Matthew, Alice, Alex, Michael, Jack, Ava, Carmen, Emily, Elena, Emma, and others.

Use Cases

• Podcast narration, voice-overs, accessibility features, e-learning narration, dynamic content generation, and more.

Safety and Usage Considerations

• Ensure you have appropriate rights to the text being converted and comply with applicable laws and platform terms.

Core Features

• Quick HTTP API access with a single POST request
• Support for 21+ languages and multiple voices
• High-quality, natural-sounding speech synthesis
• Simple JSON-based request payloads
• MP3 audio output ready for integration
• Minimal setup with no card required for basic usage