Change audio speed | agent view

The same page content and links, with explicit tool capabilities. Tools marked with an API can run directly through HTTP. Other tools require the browser interface or are not connected yet.

Tool capabilities

{
  "id": "change-audio-speed",
  "category": "media-tools",
  "built": true,
  "requirements": "Playback speed with optional pitch preservation and output preview.",
  "implementation": {
    "fields": [
      {
        "key": "speed",
        "label": "Speed multiplier",
        "value": 1.25,
        "type": "number",
        "min": 0.5,
        "max": 2,
        "step": "any"
      },
      {
        "key": "engine",
        "label": "Processing location",
        "type": "select",
        "value": "browser",
        "values": [
          "browser",
          "server"
        ],
        "labels": {
          "browser": "Browser (files stay here)",
          "server": "Local server (larger files)"
        }
      }
    ],
    "files": true,
    "accept": ".mp3,.wav,.m4a,.aac,.flac,.ogg,.opus",
    "multiple": false,
    "input": false,
    "processing": "Browser or server",
    "native": true,
    "maxFileBytes": 20971520,
    "note": "Browser processing keeps files on this device. Choosing Local server sends files to this website’s own processor. Preserves pitch and exports WAV.",
    "hybrid": true,
    "experience": {
      "automatic": false,
      "single": false,
      "label": "Your text",
      "placeholder": "Type or paste your input…",
      "help": "Up to 1,000,000 characters. Review the settings before running.",
      "action": null
    },
    "mode": "explicit",
    "interactive": false
  },
  "execution": "POST /api/v1/tools/change-audio-speed/run",
  "api": {
    "id": "change-audio-speed",
    "name": "Change audio speed",
    "category": "media-tools",
    "description": "Change audio playback speed while preserving pitch.",
    "notes": "Browser processing keeps files on this device. Choosing Local server sends files to this website’s own processor. Preserves pitch and exports WAV.",
    "human_path": "/en/media-tools/change-audio-speed/",
    "method": "POST",
    "endpoint": "/api/v1/tools/change-audio-speed/run",
    "schema_url": "/api/v1/tools/change-audio-speed",
    "input_schema": {
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "input": {
          "type": "string",
          "maxLength": 1000000,
          "default": "",
          "description": "Plain text input. File tools use files instead unless otherwise documented."
        },
        "options": {
          "type": "object",
          "additionalProperties": false,
          "properties": {
            "speed": {
              "type": "number",
              "description": "Speed multiplier",
              "default": 1.25,
              "minimum": 0.5,
              "maximum": 2
            },
            "engine": {
              "type": "string",
              "description": "Processing location",
              "default": "browser",
              "enum": [
                "browser",
                "server"
              ]
            }
          }
        },
        "files": {
          "type": "array",
          "maxItems": 1,
          "items": {
            "type": "object",
            "required": [
              "name",
              "base64"
            ],
            "additionalProperties": false,
            "properties": {
              "name": {
                "type": "string",
                "maxLength": 200,
                "description": "Filename only, no path."
              },
              "mime": {
                "type": "string",
                "maxLength": 150
              },
              "bytes": {
                "type": "integer",
                "minimum": 0,
                "description": "Optional decoded byte count; must match content if supplied."
              },
              "base64": {
                "type": "string",
                "contentEncoding": "base64",
                "description": "File bytes as padded base64. Use the tool-specific limits.files_bytes value for the total decoded input size."
              }
            }
          }
        }
      }
    },
    "output_schema": {
      "type": "object",
      "required": [
        "tool",
        "result"
      ],
      "properties": {
        "tool": {
          "type": "string"
        },
        "result": {
          "type": "object",
          "required": [
            "text",
            "files"
          ],
          "properties": {
            "text": {
              "type": [
                "string",
                "null"
              ]
            },
            "data": {
              "description": "Parsed JSON when the textual result is JSON."
            },
            "name": {
              "type": "string"
            },
            "mime": {
              "type": "string"
            },
            "files": {
              "type": "array",
              "items": {
                "type": "object",
                "required": [
                  "name",
                  "mime",
                  "bytes",
                  "base64"
                ],
                "properties": {
                  "name": {
                    "type": "string"
                  },
                  "mime": {
                    "type": "string"
                  },
                  "bytes": {
                    "type": "integer"
                  },
                  "base64": {
                    "type": "string",
                    "contentEncoding": "base64"
                  }
                }
              }
            }
          }
        }
      }
    },
    "processing": "Server; self-hosted native engine, no external conversion service",
    "limits": {
      "request_bytes": 31457280,
      "input_characters": 1000000,
      "files_bytes": 20971520,
      "max_files": 1,
      "timeout_seconds": 90
    }
  },
  "agent_processing": "Server; self-hosted native engine, no external conversion service",
  "browser_agent": {
    "supported": true,
    "name": "run_current_tool",
    "discovery": "WebMCP on the human page in a supporting browser",
    "verification": "See audit/API-AUDIT.md; availability is not verification"
  }
}