{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://raw.githubusercontent.com/api-evangelist/bored-api/main/json-schema/activity.json",
  "title": "Activity",
  "description": "An activity suggestion returned by the Bored API",
  "type": "object",
  "required": [
    "activity",
    "availability",
    "type",
    "participants",
    "price",
    "accessibility",
    "duration",
    "kidFriendly",
    "link",
    "key"
  ],
  "properties": {
    "activity": {
      "type": "string",
      "description": "Human-readable description of the activity",
      "minLength": 1,
      "examples": ["Learn Express.js", "Go for a walk", "Cook a new recipe"]
    },
    "availability": {
      "type": "number",
      "description": "Availability score from 0.0 (hard to access) to 1.0 (universally available)",
      "minimum": 0,
      "maximum": 1,
      "examples": [0.0, 0.2, 0.5, 0.8, 1.0]
    },
    "type": {
      "$ref": "#/$defs/ActivityType"
    },
    "participants": {
      "$ref": "#/$defs/ParticipantCount"
    },
    "price": {
      "type": "number",
      "description": "Relative cost from 0.0 (free) to 1.0 (expensive)",
      "minimum": 0,
      "maximum": 1,
      "examples": [0, 0.1, 0.3, 0.8, 1.0]
    },
    "accessibility": {
      "type": "string",
      "description": "Human-readable description of accessibility level",
      "examples": [
        "Few challenges",
        "Some challenges",
        "Major challenges"
      ]
    },
    "duration": {
      "type": "string",
      "description": "Rough time estimate for completing the activity",
      "enum": ["minutes", "hours", "days", "weeks"],
      "examples": ["minutes", "hours"]
    },
    "kidFriendly": {
      "type": "boolean",
      "description": "Whether the activity is appropriate for children",
      "examples": [true, false]
    },
    "link": {
      "type": "string",
      "description": "Optional URL with more information about the activity; may be an empty string",
      "examples": ["https://expressjs.com/", ""]
    },
    "key": {
      "type": "string",
      "description": "Unique numeric identifier for the activity",
      "pattern": "^[0-9]+$",
      "examples": ["3943506", "1638604"]
    }
  },
  "additionalProperties": false,
  "$defs": {
    "ActivityType": {
      "type": "string",
      "description": "Category of the activity",
      "enum": [
        "education",
        "recreational",
        "social",
        "charity",
        "cooking",
        "relaxation",
        "busywork"
      ]
    },
    "ParticipantCount": {
      "type": "integer",
      "description": "Number of people needed for the activity",
      "enum": [1, 2, 3, 4, 5, 6, 8]
    }
  }
}