SaaS

SaaS API Architecture: Versioning, Auth & Webhooks

APIs are how SaaS joins the customer stack. Here is Spygar’s architecture for auth, versioning, and reliable webhooks.

SaaS API Architecture: Versioning, Auth & Webhooks
SaaS 10 min read

SaaS API architecture turns your product into a platform. Spygar ships this on SaaS API integration engagements—contracts, auth, and developer experience included.

A SaaS API without versioning and webhook retries is a partner-support ticket factory.

Building blocks

  • OpenAPI as source of truth
  • OAuth2 / API keys with tenant-aware scopes
  • Idempotent writes and cursor pagination
  • Signed webhooks with exponential backoff

Pair with architecture best practices and security practices. Need delivery? SaaS API integration.

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