Web & APIs

HTTP, APIs, JSON, authentication, and networking concepts for software support.

• HTTP status codes for software support

  How software support reads common 2xx, 4xx, and 5xx status codes when investigating SaaS product issues.

• HTTP requests and responses for support

  What an HTTP request and response contain, and which parts matter when a SaaS customer reports a broken page or API call.

• APIs and JSON for software support

  What APIs and JSON are in customer-facing software support, and how to read them without becoming an engineer.

• Authentication basics for software support

  Sessions, cookies, tokens, and common 401/403 failures explained for customer-facing SaaS support.

• DNS and networking basics for software support

  How DNS, TLS, and basic network path issues show up in SaaS support tickets—and what you can verify without owning infrastructure.