diff

{
  "type": "object",
  "description": "Either \"url\" (compare against the state fetchwerk stored for it) or \"before\" and \"after\" (compare two supplied documents).",
  "properties": {
    "url": {
      "type": "string",
      "format": "uri",
      "description": "Page to fetch and compare against its last stored state."
    },
    "since": {
      "type": "string",
      "format": "date-time",
      "description": "ISO timestamp. Picks the stored state at or before this moment instead of the newest one."
    },
    "before": {
      "type": "string",
      "description": "Earlier document as HTML or Markdown. No network access is used."
    },
    "after": {
      "type": "string",
      "description": "Later document as HTML or Markdown."
    },
    "before_fetched_at": {
      "type": "string",
      "format": "date-time",
      "description": "Optional, echoed back for inline comparisons."
    },
    "after_fetched_at": {
      "type": "string",
      "format": "date-time",
      "description": "Optional, echoed back for inline comparisons."
    }
  },
  "anyOf": [
    {
      "required": [
        "url"
      ]
    },
    {
      "required": [
        "before",
        "after"
      ]
    }
  ]
}