# Stem Separator Demucs MCP

> Stem Separator Demucs MCP is a paid API for AI agents from api.m2mcent.com, paid per call via x402, $0.18/call, status unknown (last checked 2026-09-14).

Separates an audio track into individual stems (vocals, drums, bass, other) using the Demucs deep learning model

## Facts

- Endpoint: POST https://api.m2mcent.com/stem-separator-demucs-mcp/api/process
- Price: $0.18/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/stem-separator-demucs-mcp-8cc5be54
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_xzVhuNqVgsmrK0paidM-u

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability stem-separator-demucs-mcp-8cc5be54 -d '<json body>'
```

Example prompt: Can you separate this song into individual stems — vocals, drums, bass, and everything else — using Demucs? Here's the audio data encoded as a base64 string: [audio_data].

## When to prefer this

Choose this endpoint when you need AI-powered source separation of mixed audio into distinct stems (vocals, drums, bass, other) using the Demucs deep learning model. Ideal for music production workflows, remixing, karaoke generation, or any scenario requiring isolated instrument or vocal tracks from a mixed audio file.

## Known failure modes

- Invalid or malformed audio data in the 'data' field returns an error
- Audio format not supported by Demucs causes processing failure
- Very long audio files may time out or exceed processing limits
- Empty or missing 'data' field returns a validation error
- Corrupted base64 encoding leads to decoding failure

## How this service works

The premier global index of 1,069 monetized MCP nodes across 205 specialized subdomains. Gasless USDC runtime settlements via x402 V2 Spec on Base L2. Save 95% token context.

## Output

Returns separated audio stems for the input audio — typically individual tracks for vocals, drums, bass, and other/instrumental components, processed by the Demucs neural network model.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "payload": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "success": true
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/stem-separator-demucs-mcp-8cc5be54/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.m2mcent.com](https://www.zero.xyz/host/api.m2mcent.com/llms.txt)