Curated developer articles, tutorials, and guides — auto-updated hourly


AI agents can buy from your store today, but not through the chat channels you think. Here is the 9-...


How I built multi-tenant billing on AWS Lambda with Stripe, covering plans, a Fastify billing plugin...


A synthetic Stripe example: a €3,496.99 gap between ledger and bank, explained level by level with S...


Every Stripe webhook dying with SignatureVerificationException? Here are the five real causes in Lar...


The break-even moves from $3,205 to $5,376 to $15,152 MRR as international card share and settlement...


How developers in Nigeria can actually receive USD payments in 2026 Most articles about...


I added a referral program to my SaaS. The rule sounds simple: when someone you referred becomes a.....


Built for the TestSprite Hackathon, Season 4. Live: tera-orpin-three.vercel.app · Code:...


Redirects, auth walls, missing signature checks and parsed bodies: four ways a Stripe webhook breaks...


Sur une plateforme de location de véhicules, j'ai eu à gérer des acomptes et des cautions avec...


On a vehicle rental platform, I had to handle deposits and security holds with Stripe. They both loo...


AI agents can now discover a merchant, assemble a checkout, carry a signed mandate, and settle a...


We checked 85 countries against the public country lists of 9 payment providers: Stripe, PayPal,...


We run subscription billing for a multi-tenant Rails SaaS: 2,000+ businesses, about $1M a year in...


A payment went through, but your app never heard about it. Where to look, in order, with links to St...


When you build a checkout form, you need card numbers to test it. The usual shortcut is to type 4111...


Originally published on the RetryFix blog. A soft decline is a refused card charge where the issuer...


Stripe treats any 3xx as a failed delivery. On Next.js and Vercel the usual culprits are a trailing ...


A cookie whose documented purpose was removed two refactors ago, three server side readers that must...


One of those duplicate checks reads our table, the other reads a string inside somebody else's error...


Stripe never sends a Supabase JWT. Turn off verify_jwt for the webhook function, then verify Stripe-...


Formation fees are $399, $500 and $297. Three years of holding the company cost $876, $1,600 and $6,...


A census of every reference to a primary key in a live product. One insert, one select that throws i...


Customer paid but can't get in? A calm, plain-English fix guide for AI-built apps: what to do first,...