{
  "id": "audio.merge",
  "object": "tool",
  "name": "Join audio",
  "summary": "Concatenate with crossfades.",
  "description": "Joins audio files in order into one file, optionally with a crossfade between each.",
  "category": "audio",
  "hosted_by": "Opentools",
  "runtime": "container",
  "side_effects": false,
  "status": "live",
  "credits": 3,
  "price": "$0.0030",
  "providers": [
    {
      "id": "opentools",
      "name": "Opentools",
      "price": "$0.0030"
    }
  ],
  "mcp_name": "audio_merge",
  "input_schema": {
    "type": "object",
    "properties": {
      "files": {
        "minItems": 2,
        "maxItems": 50,
        "type": "array",
        "items": {
          "anyOf": [
            {
              "type": "object",
              "properties": {
                "url": {
                  "type": "string",
                  "format": "uri",
                  "description": "Public http(s) URL of the file"
                }
              },
              "required": [
                "url"
              ]
            },
            {
              "type": "object",
              "properties": {
                "file_id": {
                  "type": "string",
                  "format": "uuid",
                  "pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$",
                  "description": "An id returned by POST /v1/files"
                }
              },
              "required": [
                "file_id"
              ]
            },
            {
              "type": "object",
              "properties": {
                "base64": {
                  "type": "string",
                  "description": "Base64-encoded file bytes (up to 10 MB)"
                },
                "name": {
                  "type": "string",
                  "description": "File name, e.g. invoice.pdf"
                },
                "content_type": {
                  "type": "string"
                }
              },
              "required": [
                "base64",
                "name"
              ]
            },
            {
              "type": "object",
              "properties": {
                "connection": {
                  "type": "string",
                  "minLength": 1,
                  "maxLength": 64,
                  "description": "A storage connection id or name (see storage.connections)"
                },
                "path": {
                  "type": "string",
                  "minLength": 1,
                  "maxLength": 1024,
                  "description": "Path of the file in that connection, e.g. reports/q3.pdf"
                }
              },
              "required": [
                "connection",
                "path"
              ]
            }
          ],
          "x-file": true,
          "description": "A file: { url }, { file_id }, { base64, name } or { connection, path } from connected storage"
        },
        "description": "Audio files in order"
      },
      "crossfade": {
        "default": 0,
        "description": "Crossfade length in seconds (0 for none)",
        "type": "number",
        "minimum": 0,
        "maximum": 10
      },
      "to": {
        "default": "mp3",
        "description": "Output format",
        "type": "string",
        "enum": [
          "mp3",
          "wav",
          "flac",
          "ogg",
          "opus",
          "m4a",
          "aac",
          "aiff",
          "wma",
          "ac3",
          "amr",
          "mka",
          "weba",
          "caf"
        ]
      },
      "audio_bitrate": {
        "description": "Audio bitrate in kbps (ignored for lossless formats)",
        "type": "integer",
        "minimum": 8,
        "maximum": 512
      }
    },
    "required": [
      "files"
    ]
  },
  "kind": "tool"
}