Media

MP3 to AMR Converter

Convert MP3 audio files to AMR (Adaptive Multi-Rate) format

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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/mp3-to-amr' \
  -F 'file=@/path/to/audioFile.ext'

# 2) Call the tool with the returned filePath values
curl -X POST 'https://api.elysiatools.com/en/api/tools/mp3-to-amr' \
  -F 'audioFile=/path/to/file.ext' \
  -F 'bitrate=12.2' \
  -F 'channels=1' \
  -F 'keepMetadata=true'

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/mp3-to-amr

Parameters

Name	Type	Required	Description
audioFile	fileupload required	Yes	Upload an MP3 file to convert to AMR
bitrate	select	No	AMR supports various bitrates optimized for different speech quality levels.
channels	select	No	AMR is mono-only for speech applications.
keepMetadata	checkbox	No	—

File-type parameters must be uploaded first via POST /upload/mp3-to-amr, then the returned filePath is passed to the corresponding file field.

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-mp3-to-amr": {
      "name": "mp3-to-amr",
      "description": "Convert MP3 audio files to AMR (Adaptive Multi-Rate) format",
      "baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=mp3-to-amr",
      "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": "mp3-to-amr",
    "arguments": {
  "audioFile": "https://example.com/file.ext",
  "bitrate": "12.2",
  "channels": "1",
  "keepMetadata": true
}
  }
}

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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