generated: '2026-07-18'
method: searched
source: https://documenter.getpostman.com/view/4679101/T17KeScV + https://docs.appgain.io/
docs: https://docs.appgain.io/complete-knowledge-base/
authentication:
  style: apiKey
  header: appApiKey
  ref: authentication/appgain-authentication.yml
hosts:
  description: The messaging platform is split across several product hosts; requests
    are tenant-scoped by a projectId path segment. A per-account subdomain is used for
    some smart-link/campaign operations.
  api: https://api.appgain.io
  notify: https://notify.appgain.io
  automator: https://automator.appgain.io
  tenant_pattern: https://{account_subdomain}.appgain.io
url_structure:
  pattern: /apps/{projectId}/{resource}
  examples:
  - POST /apps/{projectId}/smartlinks
  - POST /apps/{projectId}/media/photo
  - POST /apps/{projectId}/events/logEvent
content_type:
  request: application/json
  bulk_uploads: multipart/form-data
  accept: application/json
idempotency:
  supported: false
  notes: No documented idempotency-key header on the Appgain REST API as of this pass.
pagination:
  supported: unknown
  notes: Not documented in the public API reference / Postman collection; most endpoints
    are action/send-oriented rather than large collection reads.
versioning:
  scheme: product-release
  notes: The platform is versioned by product release (e.g. Product V11-V14) rather
    than by an API version path segment; see changelog/appgain-changelog.yml.
error_envelope:
  format: json
  notes: Errors returned as JSON with standard HTTP status codes; no RFC 9457
    problem+json usage documented.
webhooks:
  supported: partial
  notes: Automation journeys can "fire automessage" and the WhatsApp Lite release notes
    document AI-ready webhook integrations; there is no published AsyncAPI or webhook
    event catalog.
rate_limiting:
  signaled: unknown
  notes: No documented rate-limit headers. WhatsApp Lite documents a per-day send cap
    (300 messages) as a plan quota rather than an API rate limit.