API Evangelist enrichment overlay — Squarespace Commerce Inventory Site API

overlay: 1.0.0
info:
  title: API Evangelist enrichment overlay — Squarespace Commerce Inventory Site API
  version: 1.0.0
  x-generated: '2026-08-13'
  x-method: generated
  x-source: openapi/squarespace-site-api-openapi.yml
extends: openapi/squarespace-site-api-openapi.yml
actions:
- target: $.info
  description: Attach API Evangelist provenance and cross-links to the repo artifacts that carry runtime
    semantics this contract does not express.
  update:
    x-apievangelist:
      provider: squarespace
      enriched: '2026-08-13'
      artifacts:
        conventions: conventions/squarespace-conventions.yml
        errors: errors/squarespace-problem-types.yml
        authentication: authentication/squarespace-authentication.yml
        scopes: scopes/squarespace-scopes.yml
        rate_limits: rate-limits/squarespace-rate-limits.yml
        lifecycle: lifecycle/squarespace-lifecycle.yml
        changelog: changelog/squarespace-changelog.yml
        data_model: data-model/squarespace-data-model.yml
        plans: plans/squarespace-plans-pricing.yml
- target: $
  description: Document the OAuth 2.0 flow Squarespace operates but does not declare in securitySchemes.
    Endpoints and scopes are transcribed from https://developers.squarespace.com/oauth.
  update:
    x-oauth2-undeclared:
      note: Squarespace supports OAuth 2.0 authorization code alongside the bearer API key, but only the
        http bearer scheme is declared in this contract.
      authorizationUrl: https://login.squarespace.com/api/1/login/oauth/provider/authorize
      tokenUrl: https://login.squarespace.com/api/1/login/oauth/provider/tokens
      scopeDelimiter: ','
      scopes: scopes/squarespace-scopes.yml
      accessTokenTTL: 30m
- target: $
  description: Record the runtime limits and required headers that apply to every operation in this document.
  update:
    x-runtime:
      rateLimit:
        window: 1m
        limit: 300
        status: 429
        cooldown: 1m
        headers: []
        note: No RateLimit-*, X-RateLimit-* or Retry-After headers are published.
      requiredHeaders:
      - name: Authorization
        note: Bearer API key or OAuth access token.
      - name: User-Agent
        note: REQUIRED. Requests without a User-Agent are rejected; default client User-Agents may be
          rate-limited harder.
      httpsOnly: true
      cors: false
      pagination:
        style: cursor
        param: cursor
        pageSize: 50
        responseObject: pagination
        fields:
        - hasNextPage
        - nextPageCursor
        - nextPageUrl
        note: Dynamic cursors — they point at a location, not a snapshot, so the result set can shift
          while paging.
      errorEnvelope: proprietary (type/subtype/message/details/contextId); not RFC 9457
- target: $.paths.*.*[?(@.responses)]
  description: Every operation can return 402 WEBSITE_EXPIRED when the merchant site is in an expired
    billing state. Documented since 2021-11-30 but declared on zero operations in the published contract.
  update:
    x-undeclared-responses:
    - status: 402
      type: WEBSITE_EXPIRED
      source: https://developers.squarespace.com/commerce-apis/responses-error-handling