Point a sender at a FlurryPORT endpoint and the request is kept the way it arrived: headers, body, query string, byte for byte. Send it again whenever you want, to your laptop, to staging, to a teammate. The signature still checks out, because nothing was rewritten.
Replace your webhook URL with a FlurryPORT capture endpoint. Stripe, GitHub, Shopify, Slack, Twilio: any provider that sends HTTP callbacks. FlurryPORT encrypts and stores every byte: headers, body, query params, content type. Payloads are never stored in plaintext.
Browse captured requests in a clean interface. View headers, parsed body and query parameters. FlurryPORT auto-detects the provider and highlights signature headers so you know exactly what arrived.
Pick a captured request and replay it to any target URL: your local dev server, a staging endpoint or a teammate's machine. Replay one at a time, batch-select a set or reproduce a production bug with sequential replay that fires webhooks in exact order. The original headers and body are sent byte-for-byte, preserving HMAC signatures.
Reshape each capture with a JSONata transformation and fan it out to every target that needs it. One webhook in, the right shape out, to each service automatically. Verify the sender with per-endpoint signature validation before any of it runs.
A capture is not a log line about a request; it is the request. That buys you two things. You can reproduce a bug exactly as it happened, and you can come back in three weeks and read what arrived rather than what something remembered arriving. It is also what makes an agent’s receipt worth reading.
Each of these tools solves a different webhook problem. FlurryPORT is the only one purpose-built for capture + deterministic replay during development.
| FlurryPORT | ngrok | Hookdeck | webhook.site | Svix | |
|---|---|---|---|---|---|
| Primary purpose | Capture + replay incoming webhooks | Live tunnel from internet to localhost | Webhook gateway and reliability | Inspect what a provider sends | Send webhooks to your customers |
| Persistent capture storage | Yes: encrypted at rest | No: live forward only | Yes | Yes | N/A |
| Replay any captured request | Yes: single, batch or sequence | No | Yes: single | Yes: single | N/A |
| Sequential ordered replay | Yes: stop on first failure | No | No | No | N/A |
| HMAC signatures preserved on replay | Yes: byte-identical headers and body | Yes: but live only | Yes | N/A: inspection only | N/A |
| Validates inbound signatures | Yes. Rejects invalid with 401 | No | Partial | No | N/A |
| Transform and fan-out routing | Yes. JSONata reshape, route per target | No | Partial | No | N/A |
| Per-developer isolation | Yes: endpoint-scoped targets | One tunnel per session | Yes | Public URL per session | N/A |
| Free plan for solo devs | Yes: the Deckhand plan | Yes | Yes | Yes | Yes |
Capabilities described as of April 2026. Each tool is a strong fit for the problem it was built for: tunneling, gateway reliability, ad-hoc inspection and outbound delivery are different jobs from capture-and-replay debugging.
Tunnel tools forward live traffic. FlurryPORT captures and replays: a fundamentally different approach. The full comparison.
Captured requests persist. Replay the same webhook 100 times while debugging without triggering your provider again.
Each developer gets isolated endpoints. No fighting over a shared ngrok URL or missing events because someone else restarted.
Replayed requests carry the original headers and body byte-for-byte, so signature verification passes on your local server.
Select the sequence of webhooks that broke production and replay them in order to your local server. Sequential replay waits for each to complete before sending the next, and stops at the first failure.
Capture and replay is the floor. On top of it an agent takes a real action through a pipe and hands you back the service’s own answer. See what your agent can do, or how the MCP server works.