API v1

Build with StemSplit API

Integrate AI-powered stem separation into your apps. Use with Claude, Cursor, n8n, Zapier, or any HTTP client.

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Docs API Reference MCP Server Integrations

Start separating stems in minutes

One API call to process any audio file

POST /api/v1/jobs

curl -X POST https://stemsplit.io/api/v1/jobs \
  -H "Authorization: Bearer sk_live_xxxxxxxxxxxxx" \
  -H "Content-Type: application/json" \
  -d '{
    "sourceUrl": "https://example.com/song.mp3",
    "outputType": "BOTH",
    "quality": "BEST"
  }'

Response

{
  "id": "clxxx123...",
  "status": "PENDING",
  "progress": 0,
  "creditsRequired": 180,
  "input": {
    "fileName": "song.mp3",
    "durationSeconds": 180
  }
}

Everything you need to build

Simple REST API

Clean, predictable endpoints. Upload a file, get stems back. That's it.

Webhooks

Get notified when jobs complete. Perfect for async workflows and automation.

API Key Auth

Generate keys in your dashboard. Secure Bearer token authentication.

Same Credits

Use the same credits as the web app. No separate API pricing or tiers.

How it works

1

Get a presigned upload URL

POST to /api/v1/upload with your filename

POST /api/v1/upload

2

Upload your audio file

PUT to the presigned URL (or use sourceUrl for remote files)

PUT <presigned_url>

3

Create the job

POST to /api/v1/jobs with your uploadKey and options

POST /api/v1/jobs

4

Get results via polling or webhook

Poll GET /api/v1/jobs/:id or receive webhook notification

GET /api/v1/jobs/:id

Integrations

Works with your favorite tools

From AI assistants to no-code platforms and custom apps

MCP Server

Run stem separation inside Claude Desktop, Cursor, Cline & Windsurf

n8n

Open-source workflow automation, self-hostable

Zapier

Connect to 6,000+ apps, no code required

Make

Visual automation platform (formerly Integromat)

Pipedream

Code-first automation with Node.js and Python

Power Automate

Microsoft 365 and enterprise workflow automation

Discord Bot

Let your community separate stems with slash commands

White Label

Embed stem separation into your own product or SaaS

View all integration guides

Ready to start building?

Create an account to get your API key. Same credits work for both the web app and API.

Create Free Account API Reference