Webhook debugging tunnel with deterministic replay for local development.
Relay gives local development a first-class webhook story. It exposes a public endpoint, forwards deliveries to your localhost, and records every request and response as a replayable, diffable trace — so integrating Stripe, GitHub, or any provider stops being a cycle of redeploy-and-pray.
Traces are deterministic: replay a delivery against a code change and see exactly what differs. Failed handlers can be re-run with edited payloads to reproduce edge cases on demand.
One command exposes a stable public endpoint bound to any local port. No accounts, no YAML.
Re-run any recorded delivery against new code or an edited payload. Same input, observable difference.
Side-by-side comparison of deliveries across replays — spot the field your handler missed.
Development updates shared through the journal.
Invoicing engine for solo contractors — from time entry to paid in one line of flow.