> ## Documentation Index
> Fetch the complete documentation index at: https://docs.niadra.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Object coverage

> Per declared type, how much of its objects carry each field and the median age of the newest observation: stamps only, never a value. What the Console Types screen shows.



## OpenAPI

````yaml openapi/en/cell.json GET /v1/objects/coverage
openapi: 3.1.0
info:
  title: Niadra data API
  version: '1'
  description: >-
    Writing, context, history, objects, identity, privacy and governance of one
    space. Every space has a stable address, with the space and the region in
    its name.
servers:
  - url: https://{space}.{region}.api.niadra.com
    variables:
      space:
        default: acme-prod
        description: The space, which comes in the source key.
      region:
        default: us-east-2
        description: The region of the space, which also comes in the key.
security: []
paths:
  /v1/objects/coverage:
    get:
      tags:
        - state
      summary: Object coverage
      description: >-
        Each declared type's fields, the share of its objects that carry each
        and how old it is: the Console's

        Types screen. Stamps only, never a value.


        **Authentication.** Console person token with the `integration` role (or
        admin), or a source key with the `admin` scope. It answers only in a
        space with the `state` feature on (the `features` document); in a space
        without it, 404.
      operationId: object_coverage_v1_objects_coverage_get
      responses:
        '200':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ObjectCoverage'
          description: The coverage per type.
      security:
        - sourceKey: []
        - personToken: []
components:
  schemas:
    ObjectCoverage:
      additionalProperties: false
      description: >-
        How much of each declared field the objects of each type carry, and how
        old it is, from the stamps

        alone: never a value.
      properties:
        types:
          items:
            $ref: '#/components/schemas/TypeCoverage'
          title: Types
          type: array
      required:
        - types
      title: ObjectCoverage
      type: object
    TypeCoverage:
      additionalProperties: false
      properties:
        fields:
          items:
            $ref: '#/components/schemas/FieldCoverage'
          title: Fields
          type: array
        objects:
          description: 'The objects measured: the ones of the type that changed last.'
          title: Objects
          type: integer
        type:
          pattern: ^[a-z][a-z0-9_]{0,39}$
          title: Type
          type: string
      required:
        - type
        - objects
        - fields
      title: TypeCoverage
      type: object
    FieldCoverage:
      additionalProperties: false
      properties:
        age_p50_s:
          anyOf:
            - type: integer
            - type: 'null'
          description: The median age, in seconds, of the field's newest observation.
          title: Age P50 S
        coverage:
          description: The share of the type's objects some source observed the field of.
          maximum: 1
          minimum: 0
          title: Coverage
          type: number
        field:
          maxLength: 256
          minLength: 1
          title: Field
          type: string
      required:
        - field
        - coverage
      title: FieldCoverage
      type: object
  securitySchemes:
    sourceKey:
      type: http
      scheme: bearer
      description: nia_sk_...
    personToken:
      type: http
      scheme: bearer
      bearerFormat: JWT

````