Clockodo Time Entry

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://my.clockodo.com/schemas/entry.json",
  "title": "Clockodo Time Entry",
  "description": "Schema for a Clockodo time-tracking entry. An entry records time spent by a user on a customer/project/service combination, optionally with billable status, hourly rate, and free-text description. Entries underpin reporting, invoicing, and project-budget tracking in Clockodo.",
  "type": "object",
  "required": ["customers_id", "services_id", "users_id"],
  "properties": {
    "id": {
      "type": "integer",
      "description": "Unique identifier of the entry."
    },
    "users_id": {
      "type": "integer",
      "description": "ID of the user who recorded the entry."
    },
    "customers_id": {
      "type": "integer",
      "description": "ID of the customer associated with the entry."
    },
    "projects_id": {
      "type": ["integer", "null"],
      "description": "ID of the project the entry is booked against."
    },
    "services_id": {
      "type": "integer",
      "description": "ID of the service performed."
    },
    "time_since": {
      "type": "string",
      "format": "date-time",
      "description": "Start time of the entry."
    },
    "time_until": {
      "type": ["string", "null"],
      "format": "date-time",
      "description": "End time of the entry. Null when the entry is still being timed by the stop-clock."
    },
    "duration": {
      "type": ["integer", "null"],
      "description": "Duration of the entry in seconds."
    },
    "billable": {
      "type": "integer",
      "description": "0 = not billable, 1 = billable, 2 = already billed.",
      "enum": [0, 1, 2]
    },
    "hourly_rate": {
      "type": ["number", "null"],
      "description": "Effective hourly rate (in account currency)."
    },
    "text": {
      "type": ["string", "null"],
      "description": "Free-text description of the work performed."
    },
    "lumpsum": {
      "type": ["number", "null"],
      "description": "Lump-sum amount when the entry is billed as a flat fee instead of by time."
    }
  },
  "additionalProperties": true
}