API Flow Player

Show how your API works, one request at a time. API Flow Player turns an API flow into an animated sequence diagram: each service gets a lane, each request animates between them, and a panel underneath shows the method, path, status code and the real request and response payloads.

• 4 ready-made flows: OAuth login, webhook delivery with retries, idempotent payments, and rate-limit handling with backoff

• Custom flows built entirely in the property panel: lanes, steps, methods, paths, status codes, payloads and notes

• Play, pause, step forward and back, or click any step

• Status codes color themselves (2xx, 3xx, 4xx and 5xx)

• Dark and light themes, plus accent, radius, backdrop and font controls

• Responsive: on narrow screens the diagram scrolls inside its own box

• Keyboard controls, and no moving dot for visitors who turn on reduced motion