API Evangelist enhancements for Handwrite IO Stationery API

overlay: 1.0.0
info:
  title: API Evangelist enhancements for Handwrite IO Stationery API
  version: 1.0.0
  x-generated: '2026-08-13'
  x-method: generated
  x-source: >-
    Enhancements derived from https://documentation.handwrite.io/ and API Evangelist artifacts in
    this repo. Applies to openapi/handwrite-io-stationery-api-openapi.yml — the original spec is never mutated.
extends: openapi/handwrite-io-stationery-api-openapi.yml
actions:
  - target: $.info
    update:
      x-apievangelist-provider: handwrite-io
      x-apievangelist-artifacts:
        conventions: conventions/handwrite-io-conventions.yml
        errors: errors/handwrite-io-problem-types.yml
        rate-limits: rate-limits/handwrite-io-rate-limits.yml
        lifecycle: lifecycle/handwrite-io-lifecycle.yml
        authentication: authentication/handwrite-io-authentication.yml
        sandbox: sandbox/handwrite-io-sandbox.yml
        data-model: data-model/handwrite-io-data-model.yml
      x-spec-provenance: >-
        This OpenAPI is an API Evangelist derivation from Handwrite's published Slate
        documentation (documentation.handwrite.io, source at github.com/handwriteio/API-Docs).
        Handwrite does not publish an OpenAPI of their own — probed 2026-08-13.
  - target: $.components.securitySchemes.ApiKeyAuth
    update:
      x-scheme-prefix: none
      x-key-modes:
        test: test_hw
        live: live_hw
      description: >-
        Raw API key sent as the ENTIRE Authorization header value, with no "Bearer " prefix.
        Keys are prefixed test_hw (not billed, no mail produced) or live_hw (billed, mails a
        card). Content-Type must be application/json. Browser-side use is forbidden by the
        provider. Create keys at https://app.handwrite.io/integrations/api
  - target: $.components.responses.RateLimited
    update:
      x-rate-limit:
        limit: 60
        window: minute
        scope: api-key
        headers:
          - X-RateLimit-Limit
          - X-RateLimit-Remaining
          - X-RateLimit-Reset
        retry_after: false
        error_code: rate_limit_exceeded
        observed: '2026-08-13'
  - target: $.paths['/stationery'].get
    update:
      x-agentic-access:
        action-class: connected
        consequence: read
        subject: optional
        token:
          max-ttl: 3600
        audit: none
      x-response-shape: bare JSON array, no envelope and no pagination
      x-provider-note: >-
        Returns both Handwrite's publicly available stationery and any custom stationery the
        account has uploaded. The chosen card id also determines whether the message prints on
        the front or the back of the card.
      x-identifier-note: >-
        _id is a bare 24-hex ObjectId with no type prefix. Pass it to POST /send as `card`.