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Whisper API

OpenAI-compatible speech-to-text API with speaker detection, multilingual transcription, and English translation.

Whisper API is a speech-to-text API powered by Lemonfox.ai that transcribes recordings with Whisper Large V3, supports over 100 languages, and detects speakers. Whisper API serves developers integrating transcription into applications, with a free month including 30 hours, followed by $0.17 per hour.

Updated 29 Oct 20266 sections

At a glance

Pricing
PaidWhisper API offers a free month including 30 hours of transcription, then charges $0.17 per hour.
Added
29 Oct 2026
Whisper API website screenshot

What is Whisper API?

Whisper API is a speech-to-text service for developers who want to add audio transcription to applications. Powered by Lemonfox.ai, Whisper API uses Whisper Large V3 to turn recordings into text. The website names podcasts, videos, and meetings as examples of content that can be transcribed.

Whisper API combines transcription with speaker detection and multilingual support through an OpenAI-compatible interface. That compatibility describes the API interface rather than a company affiliation: the website explicitly states that WhisperAPI.com is not affiliated with OpenAI. Access is offered through account signup and a free introductory trial.

What Whisper API can do

Whisper API provides transcription capabilities alongside features for handling multilingual recordings and conversations with multiple speakers. The service supports various file formats rather than naming a complete format list. The website also describes English translations and summaries using other AI models, separate from its description of Whisper Large V3 speech recognition.

  • Whisper API converts audio recordings into text with Whisper Large V3.
  • Whisper API supports over 100 languages.
  • Whisper API detects multiple speakers through speaker diarization.
  • Whisper API accepts various file formats.
  • Whisper API offers English translations or summaries using other AI models.

How Whisper API works

Whisper API is accessed through an OpenAI-compatible API that developers integrate into their applications. The published example sends a request to https://api.lemonfox.ai/v1/audio/transcriptions with bearer authentication. The request supplies an audio file URL and includes settings for the audio language, speaker labels, and the response format.

Whisper API provides documentation and code examples to support integration across programming languages. In the displayed request, the language is English, speaker labels are enabled, and the requested output is JSON. These examples show how a developer can submit audio and request a structured transcription response.

Who Whisper API is for

Whisper API is aimed at developers building applications that need speech-to-text processing. The source specifically identifies podcasts, videos, and meetings as transcription inputs. For people who do not want to develop an API integration, the website points to Transcripo as a separate way to convert speech into text for free.

  • Whisper API can provide podcast transcripts for applications.
  • Whisper API can convert speech from video content into text.
  • Whisper API can transcribe meetings and label multiple speakers.

Whisper API pricing and plans

Whisper API offers a free introductory month that includes 30 hours of audio transcription. After that introductory offer, the website lists transcription at $0.17 per hour. Signup and login links provide access to the service. The published offer is a limited trial followed by paid transcription, rather than an ongoing free tier.

Whisper API strengths and limitations

Whisper API brings multilingual transcription, speaker diarization, and an OpenAI-compatible interface into a developer-facing service. Documentation and a sample request make the integration approach explicit, while the listed hourly rate makes the advertised transcription price clear. The main access constraints are the need for API integration and the limited introductory free allowance.

  • Whisper API requires API integration for use within an application.
  • Whisper API limits the free offer to a month including 30 hours.
  • Whisper API charges for transcription after the introductory offer.

Whisper API FAQ

What is Whisper API?

Whisper API is a speech-to-text API powered by Lemonfox.ai that uses Whisper Large V3 to transcribe audio. Whisper API supports over 100 languages, speaker detection, and integration into applications through an OpenAI-compatible interface.

Is Whisper API free?

Whisper API offers a free introductory month including 30 hours of transcription, then lists a price of $0.17 per hour. Whisper API is therefore a paid transcription service with a limited free trial, not an ongoing free offering.

Does Whisper API support speaker diarization?

Whisper API supports speaker diarization to detect multiple speakers in audio files. Whisper API also includes a speaker_labels setting in the website's example request, alongside an audio language setting and a JSON response format.

Is Whisper API compatible with OpenAI?

Whisper API provides an OpenAI-compatible API for integrating transcription into applications. Whisper API supplies documentation and code examples, but the website explicitly states that WhisperAPI.com is not affiliated with OpenAI.

Can Whisper API translate or summarize audio?

Whisper API offers English translations or summaries using other AI models. Whisper API also supports transcription in over 100 languages, distinguishing its multilingual speech recognition capabilities from the additional translation and summarization functions described on the website.

Who is Whisper API for?

Whisper API is for developers adding transcription to applications, including workflows involving podcasts, videos, and meetings. Whisper API's website directs non-developers to Transcripo, a separate tool for converting speech to text for free.

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