Engineering Lab · Full Stack · 2026
Rehearsal
An API Reliability Workbench
An API reliability workbench for rehearsing timeouts, duplicate events, rate limits and recovery strategies over real HTTP — not a scripted animation.
Project overview
Rehearsal sends an order through inventory, payment and delivery sandbox APIs, lets you inject one failure — a lost response, a duplicate event, a rate limit, an unexpected shape — and watches the requests unfold against the provider ledgers. Run the same scenario again with a recovery strategy and compare outcomes side by side, backed by real HTTP calls and real ledgers rather than a simulated timeline. The hosted deployment pairs a Vercel web app with a real HTTP backend on a DigitalOcean VPS, routing delivery through WSO2 API Manager with server-side OAuth client credentials.
What it does
Four Failure Scenarios
Lost response, duplicate event, rate limit and unexpected response shape, each with its own recovery strategy.
Baseline vs Recovery
Run a fault with and without a recovery strategy, then compare committed-operation charts side by side.
Live Event Trace
Keyboard-accessible event playback with directional flow animation across the three provider nodes.
Downloadable Reports
PDF run reports with a ledger chart and full trace, plus the original JSON kept available separately.
Real HTTP, Real Ledgers
Three sandbox providers with per-run isolation and idempotency handling — no scripted fixtures.
WSO2 API Gateway
The hosted delivery path runs through WSO2 API Manager with server-side OAuth, verified against real token rejection and throttling checks.