Payments Intermediate
Stripe Payment Links on a Static Astro Site
Put a Stripe Payment Link or buy button on a static Astro site with no backend, and know exactly when an adapter and a webhook become necessary.
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You built it with AI.
Now ship it and get paid.
Step-by-step guides for vibe coders: deploy your app, set up payments, check delivery, and understand operating costs.
Runnable source · Recorded evidence
From a signed payment event to a private download
Run the same Astro project through changed signatures, duplicate notifications, server restarts, expiring links, and refunds. Inspect 45 recorded checks against synthetic orders and a private fixture file. No real payment account is needed.
Local Node experiment with pinned versions. It does not test live provider callbacks or cloud deployment.
Pick your path
Deploy
Get your app off localhost: hosting, domains, HTTPS, databases, and fixing deploy errors.
Payments
Stripe, Paddle, Lemon Squeezy — choose a provider, check seller eligibility, integrate checkout, and understand seller responsibilities.
Monetize
Ads, subscriptions, and pricing: turn your shipped app into revenue.
Free tool
What should you charge to net $30?
Reverse fee calculator for digital products — merchant-of-record fees, stacked surcharges and VAT all included.
Latest guides
Payments Intermediate
Why Buyers Never Get the Download Email
Buyer paid, no email arrived. Fix it in order: unpaid orders, the signed receipt link you already have, and the Cloudflare record that stalls verification.
Read more Monetize Intermediate
Lemon Squeezy Black Friday Discount: Full Setup
Build a Lemon Squeezy Black Friday discount that starts and ends on time: the four timing fields, the encoded checkout link, and the kill switch.
Read more Monetize Beginner
AdSense Low Value Content: Audit Before You Reapply
A practical audit after an AdSense low-value-content rejection: check originality, accuracy, navigation, and the deployed pages before requesting review.
Read more Monetize Beginner
Get Your First Developer Template Customers: A Test Plan
Find developer template customers with a focused launch experiment: verify the demo, choose one audience, and measure checkout, delivery, and feedback.
Read more Payments Intermediate
Astro Webhook Verification Lab: Signatures, Retries, and Refunds
Run a pinned Astro webhook lab: reject changed bodies, deduplicate deliveries, persist grants, and prevent paid replays from restoring refunded access.
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Lemon Squeezy Test Mode: Catch Checkout Bugs Before Going Live
Run your Lemon Squeezy checkout and webhooks in test mode on localhost with test cards and a tunnel. Catch bugs before your first real charge, not after.
Read more Payments Intermediate
Paid Download Lab: Expiring Links, Public URLs, and Refunds
Run a private download experiment: verify bytes, reject altered links, revoke refunded access, and reproduce why redirects to public files stay exposed.
Read more Monetize Intermediate
Google AdSense on Astro: Setup and Output Checks
Add the AdSense loader and ads.txt to a static Astro site, inspect the generated HTML, and separate code installation from site approval.
Read more Payments Intermediate
Lemon Squeezy Webhook Not Firing or Invalid Signature: 5 Fixes
Lemon Squeezy says the webhook was sent but your handler never runs — or X-Signature never matches. Five causes in order, with Node, Next.js and Go fixes.
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Lemon Squeezy License Key API: Activate, Validate, Deactivate
Three endpoints, no API key, Access-Control-Allow-Origin: *. Working Lemon Squeezy license key code, plus 5 traps that leak emails and burn activation slots.
Read more Deploy Beginner
Git Push Not Triggering a Vercel Deploy: 9 Checks, in Order
Pushed to GitHub and Vercel did nothing? No deploy, no error. These 9 checks find the cause, starting with whether the Vercel Bot left a comment.
Read more Deploy Beginner
Netlify Build Failed: What Exit Code 2 Actually Means (3 Fixes)
'Build script returned non-zero exit code: 2' on Netlify isn't the real error. Here are the 3 causes behind it, ranked, with the exact fix for each.
Read more Monetize Beginner
How to Price a Developer Template: A Cost Worksheet
Choose a test price using product scope, support costs, and fee arithmetic. Worked examples are hypothetical and include no promised sales or conversion uplift.
Read more Deploy Intermediate
Cloudflare Pages Environment Variables Not Working (5 Fixes)
Variable set in Cloudflare Pages but your build still reads undefined? Five ranked causes, including the one where secrets simply don't exist at build time.
Read more Deploy Intermediate
Application Error: a Client-Side Exception on Vercel (4 Fixes)
Page goes blank with 'a client-side exception has occurred' on Vercel? Four ranked causes: env vars, hydration, stale chunks, missing error boundary.
Read more Payments Intermediate
Lemon Squeezy Checkout on an Astro Site (No Backend)
Add Lemon Squeezy checkout to a static Astro site with no backend: lemon.js button, Cloudflare Pages webhook, raw-body signature checks, test-mode traps.
Read more Deploy Beginner
CORS Error on Vercel: Add the Right Header
"Blocked by CORS policy" after deploying to Vercel? What the error means, and the exact place to add the header: vercel.json, next.config, or your route.
Read more Deploy Beginner
404 on Refresh: Fix SPA Routing on Vercel, Netlify & CF Pages
Refresh a deep link and get a 404 though your homepage works? Client-side routing on static hosts — exact fixes for Vercel, Netlify, and Cloudflare Pages.
Read more Payments Beginner
Getting Paid Without Stripe: Ko-fi and PayPal Checklist
Check Ko-fi payment settings, PayPal receiving and withdrawal eligibility, fees, and delivery before publishing your first payment link.
Read more Deploy Beginner
Environment Variables on Vercel: Where API Keys Live
Where do your API keys actually go on Vercel? How to add environment variables, why they stay undefined until you redeploy, and the prefix that leaks keys.
Read more Deploy Intermediate
Vercel Domain Not Secure? SSL & Redirect Loop Fixes
Diagnose Vercel custom-domain HTTPS failures by symptom: DNS verification, certificate issuance, Cloudflare SSL mode, redirects, and mixed content.
Read more Payments Beginner
Stripe Not Available in Your Country? Check These Routes
Check seller eligibility, supported payouts, and product restrictions before choosing a merchant of record, PayPal route, or foreign company.
Read more Payments Beginner
Do I Need an LLC to Sell Digital Products? A US Checklist
Separate US business structure, payment eligibility, and tax obligations before selling digital products.
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Merchant of Record vs Payment Processor: Responsibilities
Compare seller responsibilities, eligibility, tax handling, and total cost before choosing a payment model for a digital product.
Read more Deploy Beginner
Vercel Build Failed? 5 Causes Matched to Your Error Log
Match a failed Vercel build to its first error: dependency install, Node version, TypeScript, output settings, or resource limits.
Read more Deploy Beginner
Transfer a Domain to Vercel or Just Change DNS?
Separate registrar transfers from DNS changes. Preserve email records, check transfer eligibility, and connect a Vercel domain using dashboard values.
Read more Deploy Beginner
Module Not Found on Vercel (Works Locally): 5 Causes & Fixes
Module not found on Vercel but works locally? The build server isn't your laptop. The 5 real causes — case mismatches, Git traps, missing deps — and fixes.
Read more Deploy Beginner
Do I Need to Buy an SSL Certificate? No — and Here's Why (2026)
Do I need to buy an SSL certificate? No. Modern hosts issue free SSL automatically. Here's where free certs come from, and when paid ones actually matter.
Read more Deploy Beginner
How to Buy a Domain and Set Up DNS for the First Time (2026)
How to buy a domain and set up DNS for the first time: fair .com prices in 2026, the DNS records that actually matter, and the beginner mistakes to avoid.
Read more Deploy Beginner
Vercel Custom Domain Setup: Namecheap & Cloudflare Records
Vercel custom domain setup for Namecheap & Cloudflare: the exact DNS records (A + CNAME), auto SSL, www vs apex, and the mistakes that break verification.
Read more Deploy Beginner
Vercel vs Netlify vs Cloudflare Pages: Deployment Checklist
Compare hosting by output type, runtime compatibility, commercial terms, and billing. Includes a migration checklist for static Astro sites.
Read more Deploy Beginner
Deploy Your First App to Vercel (No DevOps Experience)
You built an app with AI. Here's how to get it off your laptop and onto the internet with Vercel — step by step, no prior deployment experience required.
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