Percentage change | 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": "percentage-change",
  "category": "calculators",
  "built": true,
  "requirements": "Signed change versus absolute percentage difference; zero and negative baselines explained.",
  "implementation": {
    "fields": [
      {
        "key": "a",
        "label": "Original",
        "value": 100,
        "type": "number"
      },
      {
        "key": "b",
        "label": "New",
        "value": 120,
        "type": "number"
      }
    ],
    "input": false,
    "note": "Result is percentage change; an original value of zero is undefined.",
    "live": true,
    "presentation": "metrics",
    "experience": {
      "automatic": true,
      "single": false,
      "label": "Your text",
      "placeholder": "Type or paste your input…",
      "help": "Change the input or settings to update your result. Results update as you type. Up to 1,000,000 characters.",
      "action": null
    },
    "mode": "automatic",
    "interactive": false
  },
  "execution": "POST /api/v1/tools/percentage-change/run",
  "api": {
    "id": "percentage-change",
    "name": "Percentage change",
    "category": "calculators",
    "description": "Calculate the percentage increase or decrease between two values.",
    "notes": "Result is percentage change; an original value of zero is undefined.",
    "human_path": "/en/calculators/percentage-change/",
    "method": "POST",
    "endpoint": "/api/v1/tools/percentage-change/run",
    "schema_url": "/api/v1/tools/percentage-change",
    "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": {
            "a": {
              "type": "number",
              "description": "Original",
              "default": 100.0
            },
            "b": {
              "type": "number",
              "description": "New",
              "default": 120.0
            }
          }
        }
      }
    },
    "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; same transformation code as browser tools",
    "limits": {
      "request_bytes": 8388608,
      "input_characters": 1000000,
      "files_bytes": 5242880,
      "max_files": 0,
      "timeout_seconds": 12
    }
  },
  "agent_processing": "Server; same transformation code as browser tools",
  "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"
  }
}

Page guide

Calculate the percentage increase or decrease between two values.