ReplayGate

ReplayGate is a web app (with an optional lightweight agent) that captures, sanitizes, and replays API requests across environments to reproduce production-only issues. Teams select an API route, time window, and environment pair (prod vs. staging), then ReplayGate generates a deterministic replay suite: ordered requests, headers, auth context, and payloads with sensitive fields automatically redacted or tokenized. It highlights behavioral diffs (status codes, latency, response schema changes) and pinpoints which upstream dependency or policy change likely caused the regression. This is not an observability clone; it’s a practical “make it fail again” tool for incident follow-up and pre-release verification. Realistically, adoption depends on trust: security controls, tight RBAC, and clear data handling. If you can’t guarantee safe capture and replay, you won’t pass procurement—so the product must be built security-first from day one.