Workday Extend Schema Introspection API

openapi: 3.2.0
info:
  title: Workday Extend Workday Custom Objects App Configurations Schema Introspection API
  description: APIs for defining and managing custom objects that extend Workday's data model to meet specific business needs. When new custom objects and business processes are built, a public REST API is automatically created for other developers and processes to use. Supports both single-instance and multi-instance custom objects attached to standard Workday business objects such as workers and organizations.
  version: v1
  contact:
    name: Workday Developer Support
    url: https://support.developer.workday.com/s/
  termsOfService: https://www.workday.com/en-us/legal.html
servers:
- url: https://{baseUrl}/api/customObjects/v1/{tenant}
  description: Workday Custom Objects API Server
  variables:
    baseUrl:
      default: api.workday.com
    tenant:
      default: tenant
security:
- OAuth2:
  - customObjects:manage
tags:
- name: Schema Introspection
  description: Operations for discovering available business objects, their fields, relationships, and query capabilities through the Graph API.
paths:
  /schema:
    get:
      operationId: getSchema
      summary: Workday Extend Retrieve the graph schema
      description: Returns the full graph schema including all available business object types, their fields, relationships, and query capabilities. Used for introspection and discovery of the data model.
      tags:
      - Schema Introspection
      responses:
        '200':
          description: Successful response with schema information
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/GraphSchema'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '403':
          $ref: '#/components/responses/Forbidden'
  /schema/types:
    get:
      operationId: listSchemaTypes
      summary: Workday Extend List available business object types
      description: Returns a collection of available business object types that can be queried through the Graph API, including their descriptions and available fields.
      tags:
      - Schema Introspection
      parameters:
      - $ref: '#/components/parameters/limit'
      - $ref: '#/components/parameters/offset'
      - $ref: '#/components/parameters/search'
      responses:
        '200':
          description: Successful response with business object types
          content:
            application/json:
              schema:
                type: object
                properties:
                  total:
                    type: integer
                  data:
                    type: array
                    items:
                      $ref: '#/components/schemas/SchemaType'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '403':
          $ref: '#/components/responses/Forbidden'
  /schema/types/{typeName}:
    get:
      operationId: getSchemaType
      summary: Workday Extend Retrieve a specific business object type schema
      description: Returns the full schema definition for a specific business object type, including all fields, their types, relationships to other objects, and available query operations.
      tags:
      - Schema Introspection
      parameters:
      - name: typeName
        in: path
        required: true
        description: The name of the business object type
        schema:
          type: string
      responses:
        '200':
          description: Successful response with type schema
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/SchemaType'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '403':
          $ref: '#/components/responses/Forbidden'
        '404':
          $ref: '#/components/responses/NotFound'
components:
  schemas:
    SchemaField:
      type: object
      properties:
        name:
          type: string
          description: Field name
        dataType:
          type: string
          description: Data type of the field
        description:
          type: string
          description: Description of the field
        isFilterable:
          type: boolean
          description: Whether this field can be used in filters
        isSortable:
          type: boolean
          description: Whether results can be sorted by this field
    GraphSchema:
      type: object
      properties:
        types:
          type: array
          items:
            $ref: '#/components/schemas/SchemaType'
          description: All available business object types
        version:
          type: string
          description: Schema version identifier
    SchemaType:
      type: object
      properties:
        name:
          type: string
          description: The name of the business object type
        description:
          type: string
          description: Description of the business object type
        fields:
          type: array
          items:
            $ref: '#/components/schemas/SchemaField'
          description: Fields available on this type
        relationships:
          type: array
          items:
            $ref: '#/components/schemas/SchemaRelationship'
          description: Relationships to other business object types
        isQueryable:
          type: boolean
          description: Whether this type can be directly queried
    ErrorResponse:
      type: object
      properties:
        error:
          type: string
          description: Error code identifying the type of error
        message:
          type: string
          description: Human-readable error message
        location:
          type: object
          properties:
            line:
              type: integer
              description: Line number in the query where the error occurred
            column:
              type: integer
              description: Column number in the query where the error occurred
    SchemaRelationship:
      type: object
      properties:
        name:
          type: string
          description: Relationship name
        targetType:
          type: string
          description: The related business object type
        cardinality:
          type: string
          enum:
          - one-to-one
          - one-to-many
          - many-to-many
          description: Relationship cardinality
        description:
          type: string
          description: Description of the relationship
  responses:
    NotFound:
      description: Resource not found
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
    Forbidden:
      description: Insufficient permissions
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
    Unauthorized:
      description: Authentication required
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
  parameters:
    offset:
      name: offset
      in: query
      description: Number of results to skip for pagination
      schema:
        type: integer
        default: 0
    limit:
      name: limit
      in: query
      description: Maximum number of results to return
      schema:
        type: integer
        default: 20
        maximum: 100
    search:
      name: search
      in: query
      description: Search term to filter results
      schema:
        type: string
  securitySchemes:
    OAuth2:
      type: oauth2
      flows:
        authorizationCode:
          authorizationUrl: https://{baseUrl}/authorize
          tokenUrl: https://{baseUrl}/oauth2/{tenant}/token
          scopes:
            customObjects:manage: Manage custom object definitions and instances
            customObjects:read: Read custom object data
externalDocs:
  description: Workday Custom Objects Documentation
  url: https://doc.workday.com/extend/custom-objects/