Eridu Taxonomy API

openapi: 3.1.0
info:
  title: Eridu Taxonomy API
  version: 1.0.0
  summary: Anonymous read access to the classification vocabularies behind eridu.ai
  description: 'Anonymous read access to the classification vocabularies behind eridu.ai — post categories
    and post tags — as registered in the WordPress core REST API.


    Eridu publishes no developer program, no developer portal and no product API. This document is an
    API Evangelist derivation of the only machine-readable interface the company serves — the WordPress
    core REST API behind eridu.ai — captured from the provider''s own live self-describing route index
    on 2026-08-12. It is read-only and anonymously readable; write methods exist on the same routes but
    require a WordPress user with an application password.'
  contact:
    name: Eridu
    url: https://eridu.ai/contact/
  termsOfService: https://eridu.ai/terms-of-use/
  x-apievangelist-derived-from: https://eridu.ai/wp-json/
  x-apievangelist-derived-on: '2026-08-12'
servers:
- url: https://eridu.ai/wp-json
  description: Eridu WordPress REST API
tags:
- name: Taxonomy
  description: Anonymous read access to the classification vocabularies behind eridu.ai — post categories
    and post tags — as registered in the WordPress core REST API.
security: []
paths:
  /wp/v2/categories:
    get:
      operationId: listCategories
      summary: List categories
      description: List post categories registered on eridu.ai.
      tags:
      - Taxonomy
      security: []
      responses:
        '200':
          description: Successful response.
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/TaxonomyItem'
          headers:
            X-WP-Total:
              description: Total number of matching records across all pages.
              schema:
                type: integer
            X-WP-TotalPages:
              description: Total number of pages available at the current per_page size.
              schema:
                type: integer
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
      parameters:
      - name: context
        in: query
        required: false
        description: Scope under which the request is made; determines fields present in response.
        schema:
          type: string
          enum:
          - view
          - embed
          - edit
          default: view
      - name: exclude
        in: query
        required: false
        description: Ensure result set excludes specific IDs.
        schema:
          type: array
          items:
            type: integer
          default: []
      - name: hide_empty
        in: query
        required: false
        description: Whether to hide terms not assigned to any posts.
        schema:
          type: boolean
          default: false
      - name: include
        in: query
        required: false
        description: Limit result set to specific IDs.
        schema:
          type: array
          items:
            type: integer
          default: []
      - name: order
        in: query
        required: false
        description: Order sort attribute ascending or descending.
        schema:
          type: string
          enum:
          - asc
          - desc
          default: asc
      - name: orderby
        in: query
        required: false
        description: Sort collection by term attribute.
        schema:
          type: string
          enum:
          - id
          - include
          - name
          - slug
          - include_slugs
          - term_group
          - description
          - count
          default: name
      - name: page
        in: query
        required: false
        description: Current page of the collection.
        schema:
          type: integer
          default: 1
          minimum: 1
      - name: parent
        in: query
        required: false
        description: Limit result set to terms assigned to a specific parent.
        schema:
          type: integer
      - name: per_page
        in: query
        required: false
        description: Maximum number of items to be returned in result set.
        schema:
          type: integer
          default: 10
          minimum: 1
          maximum: 100
      - name: post
        in: query
        required: false
        description: Limit result set to terms assigned to a specific post.
        schema:
          type: integer
      - name: search
        in: query
        required: false
        description: Limit results to those matching a string.
        schema:
          type: string
      - name: slug
        in: query
        required: false
        description: Limit result set to terms with one or more specific slugs.
        schema:
          type: array
          items:
            type: string
  /wp/v2/categories/{id}:
    get:
      operationId: getCategory
      summary: Get a category
      description: Retrieve a single category by id.
      tags:
      - Taxonomy
      security: []
      responses:
        '200':
          description: Successful response.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/TaxonomyItem'
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
      parameters:
      - name: id
        in: path
        required: true
        description: Unique identifier for the term.
        schema:
          type: integer
      - name: context
        in: query
        required: false
        description: Scope under which the request is made; determines fields present in response.
        schema:
          type: string
          enum:
          - view
          - embed
          - edit
          default: view
  /wp/v2/tags:
    get:
      operationId: listTags
      summary: List tags
      description: List post tags registered on eridu.ai.
      tags:
      - Taxonomy
      security: []
      responses:
        '200':
          description: Successful response.
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/TaxonomyItem'
          headers:
            X-WP-Total:
              description: Total number of matching records across all pages.
              schema:
                type: integer
            X-WP-TotalPages:
              description: Total number of pages available at the current per_page size.
              schema:
                type: integer
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
      parameters:
      - name: context
        in: query
        required: false
        description: Scope under which the request is made; determines fields present in response.
        schema:
          type: string
          enum:
          - view
          - embed
          - edit
          default: view
      - name: exclude
        in: query
        required: false
        description: Ensure result set excludes specific IDs.
        schema:
          type: array
          items:
            type: integer
          default: []
      - name: hide_empty
        in: query
        required: false
        description: Whether to hide terms not assigned to any posts.
        schema:
          type: boolean
          default: false
      - name: include
        in: query
        required: false
        description: Limit result set to specific IDs.
        schema:
          type: array
          items:
            type: integer
          default: []
      - name: offset
        in: query
        required: false
        description: Offset the result set by a specific number of items.
        schema:
          type: integer
      - name: order
        in: query
        required: false
        description: Order sort attribute ascending or descending.
        schema:
          type: string
          enum:
          - asc
          - desc
          default: asc
      - name: orderby
        in: query
        required: false
        description: Sort collection by term attribute.
        schema:
          type: string
          enum:
          - id
          - include
          - name
          - slug
          - include_slugs
          - term_group
          - description
          - count
          default: name
      - name: page
        in: query
        required: false
        description: Current page of the collection.
        schema:
          type: integer
          default: 1
          minimum: 1
      - name: per_page
        in: query
        required: false
        description: Maximum number of items to be returned in result set.
        schema:
          type: integer
          default: 10
          minimum: 1
          maximum: 100
      - name: post
        in: query
        required: false
        description: Limit result set to terms assigned to a specific post.
        schema:
          type: integer
      - name: search
        in: query
        required: false
        description: Limit results to those matching a string.
        schema:
          type: string
      - name: slug
        in: query
        required: false
        description: Limit result set to terms with one or more specific slugs.
        schema:
          type: array
          items:
            type: string
  /wp/v2/tags/{id}:
    get:
      operationId: getTag
      summary: Get a tag
      description: Retrieve a single tag by id.
      tags:
      - Taxonomy
      security: []
      responses:
        '200':
          description: Successful response.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/TaxonomyItem'
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
      parameters:
      - name: id
        in: path
        required: true
        description: Unique identifier for the term.
        schema:
          type: integer
      - name: context
        in: query
        required: false
        description: Scope under which the request is made; determines fields present in response.
        schema:
          type: string
          enum:
          - view
          - embed
          - edit
          default: view
components:
  securitySchemes:
    applicationPassword:
      type: http
      scheme: basic
      description: 'WordPress application passwords (HTTP Basic: username + application password). Advertised
        by the site''s own API index at https://eridu.ai/wp-json/ under `authentication.application-passwords`.
        Required only for write methods and non-public contexts; every operation in this document is anonymously
        readable.'
  schemas:
    TaxonomyItem:
      type: object
      description: A taxonomy record as returned by the WordPress core REST API. Field-level schemas are
        published by the endpoint itself via the OPTIONS method and the `context=edit` schema; they are
        not restated here so this document never diverges from the live contract.
      additionalProperties: true
    Error:
      type: object
      description: The WordPress REST API error envelope.
      properties:
        code:
          type: string
          description: Machine-readable error code, e.g. rest_post_invalid_id.
        message:
          type: string
          description: Human-readable error message.
        data:
          type: object
          description: Error data, carrying the HTTP status and, for validation failures, per-parameter
            details.
          properties:
            status:
              type: integer
              description: The HTTP status code.
          additionalProperties: true
      required:
      - code
      - message
  responses:
    BadRequest:
      description: Invalid parameter.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    Unauthorized:
      description: Authentication is required for the requested context.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    NotFound:
      description: No record matches the supplied identifier.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'