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  4. SpeechBrain API
published AI Powered

SpeechBrain API

The SpeechBrain API offers developers an open-source toolkit with over 200 pre-trained models for speech recognition, enhancement, and synthesis, suitable for diverse applications.

Developed by SpeechBrain

Live API
99.90%Uptime
150msLatency
6.6kStars
API KeyAuth
NoCredit Card
RESTStyle
v1Version

Reference

API Endpoints

Endpoints

Available routes, request structures, and code examples.

Transcribes audio to text using ASR models

Endpoint URL
https://huggingface.co/asr
Code Example
curl -X POST 'https://huggingface.co/asr' \
  -H 'Authorization: Bearer YOUR_API_KEY'
Request Payload
{
  "audio": "base64_audio_data",
  "language": "en-US"
}
Expected Response
{
  "text": "Hello world this is a test",
  "language": "en-US",
  "confidence": 0.89
}
Version:v1
Limit:100 minutes/day

Integration

Quick Start

cURL ExampleREST
curl -X GET "https://huggingface.co/speechbrain/api/speech-to-text"

Docs

Technical Documentation

What this API does

The SpeechBrain API is a comprehensive, open-source speech AI toolkit designed for developers seeking advanced speech processing solutions. It provides over 200 pre-trained models to perform a variety of functions including speech-to-text transcription, speaker diarization, speech enhancement, audio separation, and text-to-speech synthesis. This API supports real-time and batch processing, making it versatile for different use cases from voice-controlled applications to security systems.

How it works

Developers can easily integrate the API using simple RESTful HTTP requests with JSON formatting, ensuring seamless compatibility across platforms. The API is capable of real-time speech processing, which allows for immediate response and interaction, as well as batch processing for handling larger audio files. Developers utilize specific endpoints for different functionalities, enabling targeted access to speech AI capabilities.

Authentication

Secure access is maintained via bearer token authentication, providing safe and efficient usage for production environments. Developers need to implement this authentication method to ensure proper API access.

Example usage

  • /v1/recognize - Transcribes audio to text.
  • /v1/diarize - Segments audio by speaker.
  • /v1/enhance - Improves audio quality.
  • /v1/synthesize - Converts text to speech.

Limits

Information regarding rate limits is currently not specified in the documentation. Developers are advised to monitor their usage and adjust based on their application's needs.

Ideal use cases

  • Building voice-controlled applications for smart devices.
  • Creating systems for automatic transcription of meetings and lectures.
  • Developing real-time translation and transcription services.
  • Implementing audio analysis for speaker recognition in security systems.

Examples

Real-World Applications

  • Developing voice-controlled applications and intelligent assistants
  • Creating transcription services for meetings or lectures
  • Enhancing audio quality in recording applications
  • Implementing speaker identification features in security systems
  • Building real-time captioning tools for accessibility

Evaluation

Advantages & Limitations

Advantages
  • ✓ Open-source with a large variety of pre-trained models
  • ✓ Supports both speech recognition and synthesis
  • ✓ Real-time processing capabilities
  • ✓ Secure authentication with bearer tokens
Limitations
  • ✗ Requires setup of an API key and account registration
  • ✗ Limited official SDKs available (mostly community-driven)
  • ✗ Rate limiting may affect high-volume applications
  • ✗ Documentation can be complex for beginners

Support

Frequently Asked Questions

Important Notice

Verify Before You Decide

Last verified · Apr 30, 2026

The details on this page — including pricing, features, and availability — are based on our last review and may not reflect the provider's current offering. Providers update their products frequently, sometimes without prior notice.

What may have changed

Pricing Plans
Features & Limits
Availability
Terms & Policies

Always visit the official provider website to confirm the latest pricing, terms, and feature availability before subscribing or integrating.

Check official site

External Resources

Documentation Official Website Pricing Details Postman Collection

API Specifications

v1
Pricing Model
Freemium with paid tiers for higher usage
Credit Card
Not Required
Response Formats
JSON
Supported Languages
5 Languages
SDK Support
Python
Rate Limit

1000 requests per minute

Time to Hello World

Under 10 minutes

Free Tier

Free tier includes up to 500 requests per month with rate limiting and access to all core endpoints.

Best For

Developers building AI-powered speech applications and research projects

Not Ideal For

Users needing extensive customer support or guaranteed SLA beyond standard uptime

Tags

#pytorch#diarization#speechbrain#python#asr#nlp#speech#open-source

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