HATEOAS Hypermedia Controls — Designing Action Buttons, Forms, and Navigation in Hypermedia APIs

In this tutorial, you will learn about HATEOAS Hypermedia Controls. We cover key concepts, practical examples, and best practices to help you master this topic.

HATEOAS hypermedia controls are the interactive elements — links, action buttons, forms, and state transitions — that guide clients through an API workflow without out-of-band documentation.

What You'll Learn

• Navigational links vs action controls
• Designing form controls with fields and validation
• Conditional controls based on state
• Grouping related controls
• Internationalizing control labels

Why It Matters

Well-designed controls reduce client errors and improve API usability. DodaTech's threat remediation API uses action controls with field validation, reducing incorrect remediation attempts by 80% compared to free-form API calls.

flowchart LR
    A["Hypermedia Control Types"] --> B["Navigational Links"]
    A --> C["Action Controls"]
    A --> D["Form Controls"]
    A --> E["State Transitions"]
    B --> F["self, next, prev, related"]
    C --> G["POST actions with method hints"]
    D --> H["Fields with types and validation"]
    E --> I["State machine via link relations"]

What's Next

Implement controls in {{< ilink "HATEOAS" "HATEOAS Actions and Forms" }}, and learn {{< ilink "REST API" "HATEOAS State Transitions" }} for workflow-driven APIs.