Media

Audio Crossfade Merge

Merge audio files with a crossfade effect between them

file· File resultOpen tool

Quick start

Call this tool from your code in three languages.

cURL

# 1) Upload each file first → returns { filePath }
curl -X POST 'https://api.elysiatools.com/upload/audio-crossfade-merge' \
  -F 'file=@/path/to/audioFiles.ext'

# 2) Call the tool with the returned filePath values
curl -X POST 'https://api.elysiatools.com/en/api/tools/audio-crossfade-merge' \
  -F 'audioFiles=/path/to/file.ext' \
  -F 'crossfadeDuration=3' \
  -F 'outputFormat=mp3' \
  -F 'sampleRate=auto' \
  -F 'channels=auto'

API reference

Send a POST request with your inputs as JSON. File parameters require a separate upload first.

Endpoint

HTTP

POST https://api.elysiatools.com/en/api/tools/audio-crossfade-merge

Parameters

Name	Type	Required	Description
audioFiles	fileupload required	Yes	—
crossfadeDuration	text	No	—
outputFormat	select	No	—
sampleRate	select	No	—
channels	select	No

MCP integration

Add this tool to your Model Context Protocol server so AI agents can list and call it.

Server configuration

Add this block to your MCP client configuration:

mcp.json

{
  "mcpServers": {
    "elysiatools-audio-crossfade-merge": {
      "name": "audio-crossfade-merge",
      "description": "Merge audio files with a crossfade effect between them",
      "baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=audio-crossfade-merge",
      "command": "",
      "args": [],
      "env": {},
      "isActive": true,
      "type": "sse"
    }
  }
}

List available tools

After connecting to the SSE endpoint, list the exposed tools:

tools/list

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/list"
}

Call this tool

Invoke the tool by its id, passing arguments built from its parameters:

tools/call

{
  "jsonrpc": "2.0",
  "id": 2,
  "method": "tools/call",
  "params": {
    "name": "audio-crossfade-merge",
    "arguments": {
  "audioFiles": "https://example.com/file.ext",
  "crossfadeDuration": "3",
  "outputFormat": "mp3",
  "sampleRate": "auto",
  "channels": "auto"
}
  }
}

Chain multiple tools in one session with a comma-separated toolId list, e.g. /mcp/sse?toolId=png-to-webp,jpg-to-webp,gif-to-webp (max 20).

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