How to Verify Square Webhook Signatures (and the Notification-URL Trap)
Square's webhook signature catches people in a specific way: the signature is computed over the notification URL joined to the raw request body, not t…
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PayPal IPN is deprecated — the IPN Webhooks migration drops payments in four silent ways
If you take money through PayPal's legacy Instant Payment Notification (IPN) — a Website Payments Standard button, a WooCommerce/Gravity Forms PayPal …
How to Test Twilio Webhooks Locally
The Problem: Twilio Webhooks Won't Hit Your Localhost When you're building a Twilio integration—whether handling incoming SMS, voice callbacks, or cal…
Webhook Signature Mismatch: Root Causes & Solutions
The Silent Killer: Why Webhook Signature Mismatch Errors Happen A webhook arrives at your endpoint, but the signature verification fails. Your handler…
How to Verify HubSpot Webhook Signatures (v1, v2, and the v3 You Should Actually Use)
HubSpot has shipped three different webhook signature schemes over the years, and they all use similar header names. Most of the broken HubSpot webhoo…
How to Test Slack Webhooks Locally
The Challenge of Testing Slack Webhooks Locally Testing Slack webhooks locally is deceptively tricky. Slack needs to reach your handler over the inter…
Webhook Retry Logic: Exponential Backoff Best Practices
Why Webhook Retry Logic Matters Your webhook handler crashes. The provider sends a request. You miss it. Now what? Without proper webhook retry logic …
Webhook Idempotency: Handling Duplicate Events
The Silent Killer: Why Webhook Idempotency Matters You deploy a webhook handler that charges a customer $50 on every payment.completed event. The paym…
How to Test Shopify Webhooks Locally
The Problem: Shopify Webhooks Won't Hit Your Local Machine You're building a Shopify app. Your backend listens on http://localhost:3000/webhooks/order…
Your Webhook Tool Can't Tell You What Actually Happened
You get a 200. Or you get a timeout. That's it. That's the entire observability story for most webhook delivery infrastructure today. A status code an…
Sync a mailbox into your own database with Nylas
You want your app to have its own copy of a user's email: to search it fast, run analytics over it, or feed it to a model without hitting the provider…
Test Webhooks Locally Without ngrok
The ngrok Problem If you've built against Stripe, GitHub, or Shopify webhooks, you know the friction: spin up ngrok, get a random URL, paste it into y…
Mastering Webhook Signature Verification in Local Dev
The 400 Bad Request Ghost You’ve set up your listener, configured your tunnel, and triggered a test event from Stripe or GitHub. Everything looks perf…
How I Cut Our Shopify API Usage in Half (Without Losing Features)
If you build on Shopify long enough, you hit the wall. Throttled requests. Stalled inventory syncs. Webhook backlogs piling up during a flash sale. Sh…
Idempotency Lessons From an Email Agent
A customer emails your support agent at 9:14 a.m. At 9:15 they get a helpful reply. At 9:16 they get the same reply again, word for word. Nothing cras…
How to Build a Telegram Crypto Checkout in Go (And Avoid Going Insane with Manual Checks)
We've all built that one MVP. You know the flow: Your bot spits out a USDT address. You ask the customer to reply with a transaction hash or, worse, a…
Building Adal: predictable webhook delivery without black boxes
Hi DEV community, I'm Yuriy, a fullstack developer and DevOps engineer with 10+ years of experience. I'm currently building Adal — a webhook delivery …
Shopify Webhook Observability: Complete Implementation Guide
Shopify Webhook Observability: Complete Implementation Guide Webhooks are the nervous system of your Shopify integration. When they fail silently, dat…
Building Reliable Event Delivery for XRPL Applications
The XRP Ledger processes thousands of transactions every minute. Each transaction creates ripple effects across wallets, order books, and network stat…
Handling Duplicate Shopify Webhook Events (And Why You Must)
You built a Shopify integration. It works great in dev. Then in production, a customer gets charged twice. Or an order ships twice. Or your inventory …
Stop Losing Shopify Webhooks: A Retry Strategy That Survives Real Outages
Stop Losing Shopify Webhooks: A Retry Strategy That Survives Real Outages Here is a scenario every Shopify developer eventually lives through. It is t…
The Wrong Way to Think About XRPL Event Infrastructure
Most developers approach XRPL event monitoring like it's a simple polling problem. They spin up a script that checks wallet balances every few minutes…
I built an open dataset of 1,119 SaaS webhook events. Here's what surprised me.
If you have ever tried to wire up webhooks from more than three SaaS apps, you already know the punchline: every vendor invented their own conventions…
Why your Stripe webhook might be silently dropping events (and how to find out)
If you process Stripe subscriptions and have never opened Workbench → Webhooks → Event deliveries (or the older Developers → Webhooks → Attempts view)…
From Webhooks to x402: A Practical Migration Guide for Developers
Asynchronous Trust and Its Hidden Costs Webhooks are a liability for financial infrastructure. Separating action from settlement introduces real fragi…
Self-Hosted Vessel Email Alerts with AWS Lambda and SES
The thing you actually want is an email. Not a dashboard you have to remember to open. Not a webhook you have to write a server for. An email — the ki…