English Constructicon API

# authorship: written by API Evangelist from the English Constructicon project's public API
# documentation page and observed live responses. NOT published by the University of Birmingham.
# x-method: generated
# x-source-url: https://englishconstructicon.bham.ac.uk/database/api/
openapi: 3.2.0
info:
  title: English Constructicon Constructions API
  description: Open research API for the English Constructicon project, a construction grammar database hosted at the University of Birmingham (Research Software Group, College of Arts and Law). Exposes read-only JSON endpoints for listing constructions and retrieving a single construction by id. No authentication required. Spec derived from the published API documentation and the live response of the /constructions endpoint.
  version: 1.0.0
  contact:
    name: Florent Perek
    email: f.b.perek@bham.ac.uk
  license:
    name: University of Birmingham
    url: https://englishconstructicon.bham.ac.uk/
servers:
- url: https://englishconstructicon.bham.ac.uk/database/api
  description: Production
tags:
- name: Constructions
paths:
  /constructions:
    get:
      operationId: listConstructions
      summary: List all constructions
      description: Returns the full list of constructions in the English Constructicon database as a JSON array. Observed live to return 101 entries.
      responses:
        '200':
          description: A JSON array of construction objects.
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/Construction'
      tags:
      - Constructions
  /constructions/{id}/:
    get:
      operationId: getConstruction
      summary: Retrieve a single construction by id
      description: 'Returns a single construction record identified by its integer id, as documented on the project API page. The trailing slash is required: /database/api/constructions/{id} 301-redirects to /database/api/constructions/{id}/ (Django APPEND_SLASH), verified live 2026-08-30.'
      parameters:
      - name: id
        in: path
        required: true
        description: Integer identifier of the construction.
        schema:
          type: integer
      responses:
        '200':
          description: A single construction object.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Construction'
        '404':
          description: No construction exists with the supplied id.
      tags:
      - Constructions
components:
  schemas:
    Construction:
      type: object
      description: A single entry in the English Constructicon construction grammar database.
      properties:
        id:
          type: integer
          description: Sequential integer identifier.
          example: 1
        construction_id:
          type: string
          description: Human-readable construction code.
          example: Vthat0
        pattern:
          type:
          - string
          - 'null'
          description: Short surface pattern label, may be null.
          example: V that
        name:
          type: string
          description: Display name of the construction (may contain quoted text).
          example: '"V that"'
        description:
          type:
          - string
          - 'null'
          description: Long-form prose description of the construction, may be null.
        author:
          type:
          - string
          - 'null'
          description: Attributed author, may be null.
        usagenotes:
          type:
          - string
          - 'null'
          description: Usage notes such as register, may be null.
          example: literary
        form:
          type:
          - string
          - 'null'
          description: Syntactic form template.
          example: NP Verb (that) Clause
        meaning:
          type:
          - string
          - 'null'
          description: Semantic description of the construction.
          example: An Agent relates to a Fact in a way specified by the verb.
      required:
      - id
      - construction_id
      - name