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Fadr API

API service

by Fadr

Stem-separation API: upload a song and get vocals, drums, bass, melodies and instrumental stems, MIDI, chord progression, key and tempo, billed at $0.05 per minute of audio.

Find alternatives to Fadr API

What it does

• Audio editing

Features 4

• Stem separationSeparates a song into vocals, drums, bass, melodies and an instrumental.
• MIDI per stemReturns MIDI for each stem except drums.
• Chord progressionReturns the chord progression as txt and MIDI.
• Key and tempo detectionProvides advanced key and tempo detection for a song.

Sources

Pricing

Official documentation · 10 Oct 2026

"Create Stem Task US$0.05 per minute of audio", the only paid endpoint. "A Fadr Plus subscription is required to use the Fadr API"; Plus is $10/month or $100/year and each renewal adds up to $10.00 of API credits.

Description

Official documentation · 10 Oct 2026

"Right now, the Fadr API includes features from Fadr's Stems page. You can separate any song into its main stems - vocals, drums, bass, melodies, and instrumental ... You also receive midi of each stem except for drums, the chord progression as txt and midi, and advanced key and tempo detection."

What it does

Official documentation · 10 Oct 2026

Stem separation plus key and tempo detection over HTTP.

Sold within

Official documentation · 10 Oct 2026

"Usage of the Fadr API requires a Fadr Plus subscription, which costs $10/mo or $100/yr. Your subscription pays for your first $10 of API usage every month." Usage beyond the credit is billed on its own meter.

Name

Official documentation · 10 Oct 2026

Docs page "Fadr API Overview": "Welcome to the Fadr API docs."

URL

Official documentation · 10 Oct 2026

Fadr's API documentation; Fadr publishes no separate marketing page for the API, and the docs give it a name and a price line.

Interfaces

Official documentation · 10 Oct 2026

REST endpoints with API-key authentication (docs: Authentication, Endpoints).

Modalities

Official documentation · 10 Oct 2026

Audio file in; stems (plus MIDI and text) out.

Intended for

Self-reported · 10 Oct 2026

Documentation written for developers integrating stem separation.

Also from Fadr

• Fadr Stems Application

  Free browser vocal remover and stem splitter that also detects key, tempo and chords and converts parts to MIDI, with a paid Plus tier for more stem types.

• Fadr Stems Plugin Application

  DAW plugin that splits whatever is on a track into vocal, drum, bass and other stems, live in real time or from a recording, so they can be muted, soloed and mixed in place.

• Siren Application

  A musical synthesizer that creates playable instruments from text descriptions.

• DrumGPT Application

  An audio plugin that generates playable drum kits from text descriptions.

• Remix Application

  An online studio for making remixes and mashups with AI synchronization.

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