Platform 3 · Backend & API Modules
API Fixture Freight: 150 Mock APIs
built by Kadri Tamm
All levels 150 files 381 aboard
Open fare
€1–€100
Line KJ-111 Platform 3 · Backend & API Modules
Webhook Relay Kit
Send signed outbound webhooks from your app with queued delivery, retries, replay and a delivery log.
121
builders
KT Maintained by Kadri Tamm
- Last updated October 2026
- English
- 1h 12m of walkthroughs
- 47 files
What you get
5 items in the boxEvery bullet below is in the download, working, the moment your payment clears.
- Queued, signed webhook delivery with a retry ladder
- Per-endpoint secrets with rotation
- SSRF protection for user-supplied URLs
- Delivery log with replay and auto-disable on repeated failure
- Receiver examples in PHP, Node and Python
What's in the box
4 parts · 47 files · 1h 12m of walkthroughs
10 files with a 12m walkthrough video. This part is documented in the architecture guide, with notes on every decision and how to change it for your own project.
The full file tree and the walkthroughs are in your download, available straight after checkout.
8 files with a 18m walkthrough video. This part is documented in the architecture guide, with notes on every decision and how to change it for your own project.
The full file tree and the walkthroughs are in your download, available straight after checkout.
13 files with a 25m walkthrough video. This part is documented in the architecture guide, with notes on every decision and how to change it for your own project.
The full file tree and the walkthroughs are in your download, available straight after checkout.
16 files with a 17m walkthrough video. This part is documented in the architecture guide, with notes on every decision and how to change it for your own project.
The full file tree and the walkthroughs are in your download, available straight after checkout.
4 parts · 47 files
1h 12m total length
You will need
Short list, and deliberately so. If you meet these you can start today.
- A Laravel 11 or 12 application with a queue worker
About this product
When your customers ask for webhooks, the first version is always a synchronous HTTP call inside a request — and it is always the version that takes your app down when a subscriber's server hangs. Webhook Relay Kit is the second version, done properly.
Events are queued and delivered by workers with a retry ladder, every payload is signed with a per-endpoint secret using an HMAC scheme compatible with Stripe's, and an SSRF guard refuses deliveries to private and loopback addresses. Endpoints that fail repeatedly switch themselves off and record why.
An admin screen lists every delivery with its status, duration and response, lets you replay one, and rotates secrets without downtime. Receiver examples in PHP, Node and Python show your customers how to verify signatures.
Frequently asked questions
Still unsure about something? Write to our contact page and a human answers, usually the same working day.
Yes. Subscribers can verify deliveries with an existing Stripe signature verifier by changing only the secret.
Checkout is handled on our provider's secure payment page. The moment your payment clears we email your personal access link and access code to the address you used at checkout, and the same link appears in your account library. There is nothing to install and nothing to wait for.
Email within 14 days of your purchase, quote your order number, and we refund the full amount to your original payment method. No form to fill in and no questions about how much of the product you watched.
What builders say
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Your maker
KT
Kadri Tamm
Laravel architect, builds the SaaS and billing lines
- 1,964 builders aboard
- 6 products published
- 4.6 maker rating
- Laravel
- PHP
- Stripe billing
- Multi-tenancy
- Webhooks
Kadri has spent eleven years building subscription products in PHP, the last six of them on Laravel, for clients ranging from a two-person bookkeeping start-up to a national ticketing operator. She maintains the Starter Kit and billing lines at Koodijaam and writes every architecture guide herself. Her rule for a kit is simple: if she would not deploy it for a paying client, it does not ship.
€60
EUR
One-time payment · lifetime access