overlay: 1.0.0
info:
  title: API Evangelist enhancements for Budibase Public Applications API
  version: 1.0.0
extends: budibase-applications-api-openapi.yml
x-generated: '2026-09-04'
x-method: generated
x-source: API Evangelist enrichment pipeline; every added value traces to a probe or a Budibase document
  cited in the action description.
x-note: Non-destructive. This overlay is never applied to openapi/budibase-applications-api-openapi.yml
  — the original stays exactly as Budibase publishes it (the refined Applications split).
actions:
- target: $
  description: Attach the provider documentation Budibase publishes for this API.
  update:
    externalDocs:
      description: Budibase Public API documentation
      url: https://docs.budibase.com/docs/public-api
- target: $.info
  description: Record the API Evangelist profile, the licence and the provider contact on the contract.
  update:
    x-apis-io-profile: https://apis.io/provider/budibase
    x-provider: Budibase
    contact:
      name: Budibase
      url: https://docs.budibase.com/docs/public-api
    license:
      name: GPL-3.0
      url: https://github.com/Budibase/budibase/blob/master/LICENSE
- target: $.info
  description: 'Record the runtime facts Budibase does not document in the contract: the measured rate
    limit, the absence of idempotency, and the error envelope.'
  update:
    x-rate-limit:
      limit: 10
      window: 1 second
      headers:
      - x-ratelimit-limit
      - x-ratelimit-remaining
      - x-ratelimit-reset
      retry_after: false
      method: probed
      observed: '2026-09-04'
      source: rate-limits/budibase-rate-limits.yml
    x-idempotency:
      supported: false
      coverage: none
      source: conventions/budibase-conventions.yml
    x-error-envelope:
      content_type: application/json
      shape: '{ "message": <string>, "status": <int> }'
      rfc9457: false
      documented_in_spec: false
      source: errors/budibase-problem-types.yml
- target: $.paths.*[?(@.operationId)].responses
  description: Budibase documents ZERO error responses across the whole contract. Add the errors this
    pipeline actually observed against the production host on 2026-09-04, so a generated client has an
    error model.
  update:
    '400':
      description: Invalid API key or invalid app ID. Budibase returns 400 — not 401 — for a missing or
        unrecognised x-budibase-api-key.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/budibaseError'
          examples:
            invalidApiKey:
              value:
                message: Invalid API key provided, please check the x-budibase-api-key header.
                status: 400
    '401':
      description: Session not authenticated.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/budibaseError'
    '403':
      description: Workspace ID missing, or the key owner lacks the Admin/Builder role.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/budibaseError'
    '404':
      description: 'Path not found. NOTE: this response body is plain text "Not Found", not the JSON envelope.'
      content:
        text/plain:
          schema:
            type: string
- target: $.components.schemas
  description: Define the observed error envelope so the added error responses resolve.
  update:
    budibaseError:
      type: object
      description: The Budibase error envelope, observed live 2026-09-04. Carries no machine-readable
        code.
      required:
      - message
      - status
      properties:
        message:
          type: string
          description: Human-readable description of the failure. Not contractually stable.
        status:
          type: integer
          description: The HTTP status, repeated in the body.