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Overview

Vobile/Pex AI Song Detector - AI Music Detector - Overview

The AI Song Detectorarrow-up-right identifies whether an audio file contains AI-generated music. It provides a simple API for submitting an audio file and receiving a classification result with accompanying details.

The detector is optimized for music, specifically individual songs, and produces one prediction per file.

Submitted audio files, whether uploaded directly or retrieved from a provided URL, are processed and then discarded. They are not stored on our servers nor used for training.

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What the API Does

  • Analyzes an audio file, either uploaded directly or fetched from a provided URL.

  • Determines whether the musical content is AI-generated.

  • Returns a JSON response containing:

    • classification result - is it AI-generated or not,

    • classification confidence score,

    • the detected AI generation platform (e.g., Suno, Udio), if known and detected with high enough confidence,

    • additional details.

The API is designed for straightforward integration into existing media workflows and high-volume use cases.

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AI Generation Platform Detection

When the detector classifies a file as AI-generated, it may also identify the AI generation platform used to create the music (such as Suno, Udio, and others).

This information is returned only when the detector reaches a sufficiently high confidence for platform attribution. If platform confidence is not high enough, the response will still indicate that the content is AI-generated, but the platform field will be empty.

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Expected Input

The detector is designed to analyze music, not generic audio.

Files should contain:

  • A single musical track

  • Minimal non-music content (speech, silence, etc.)

Files shouldn't contain:

  • UGC compilations

  • Voiceovers

  • DJ mixes

  • Mashups

  • Audio dominated by silence or speech

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Supported Audio Formats & Limits

  • Supported formats: MP3, WAV, FLAC, AAC, M4A/MP4, OGG, WEBM, and other common audio formats

  • Minimum duration: 10 seconds

  • Maximum duration: 15 minutes

  • Max file size: 100 MB

  • Stereo, mono, and variable bitrates are supported

Files outside these limits will return statuses such as too_short, too_long, or not_enough_music.

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Input Methods

The API supports two equivalent ways of providing audio for analysis:

  • Direct file upload as part of the request.

  • Providing a publicly accessible URL from which the API will retrieve the audio file.

Both methods are subject to the same format, duration, and size limits, and both produce identical classification results.

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How the API Works

  1. Authenticate using OAuth 2.0 Client Credentials

  2. Submit an audio file, either by uploading it directly or by providing a URL to the file

  3. Receive the classification result in a JSON response

Each request accepts one file and produces one output. Batch submission is not supported.

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Changelog

This changelog documents notable updates to the Pex AI Song Detector API, including new features, improvements, and model attribution enhancements.

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v3 - January 28, 2026

Added:

  • Introduced two new model attribution classifiers: Mureka and Sonauto.

  • The model attribution classifier supports a defined set of platforms listed above. Detection of AI-generated music is broader and not limited to these platforms. In such cases, predicted_model may be null.

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v2 - January 7, 2026

Added:

  • Model attribution classifier to identify which model most likely generated the queried song, when the detector has strong attribution confidence.

    • New response fields:

      • predicted_model (string)

      • predicted_model_score (float)

  • Expanded attribution coverage with targeted improvements for ElevenLabs and Boomy, while maintaining broad attribution across other leading AI music generators.

Improved:

  • Higher detection accuracy: internal evaluation shows an estimated ~10% relative lift versus v1 (varies by content type, genre, and audio quality).

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v1 - December 1, 2025

Added:

  • Initial release of the Pex AI Song Detector API.

  • Broad support across major AI music generation platforms.

  • Per-request confidence scoring via ai_score.

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Next Steps

Continue to API Documentation for:

  • Authentication flow

  • Detector endpoint details

  • Response structure

  • Error handling

  • Example implementations

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