Cosmic Hook is a focused webhook tool I built for developers who need to see what actually hit their server What it does Give each integration a unique ingest URL (/h/{token}). Store the request (method, headers, body, query). Inspect in the dashboard—tabs for headers, body, and a clean cURL copy. Replay the stored request to a destination URL you set per endpoint (server-side, with SSRF checks). Track replay status, latency, and history (success and failure). Optional email alert when a replay fails (Resend—wired on the Worker). Free vs Pro limits live in the database (profiles.plan); Stripe checkout is a stub—the buyer hooks their own billing. Stack Frontend: React + Vite + Tailwind (Cloudflare Pages) Backend: Cloudflare Worker (ingest, replay, test event, account delete, cron retention) Database + auth: Supabase (migrations included) Alerts: Resend (optional) Live demo Try it at the homepage URL. The demo runs on my Cloudflare/Supabase with usage caps so visitors can test the flow without treating it as free production hosting. After purchase, the buyer deploys their own Supabase + Worker + Pages—full limits on their install. What you’re buying Full source (web/, worker/, Supabase migrations, README, launch checklist) No secrets in the repo—you use your own Supabase and Cloudflare accounts Pre-revenue, no paying customers—I’m selling the product + deployment path, not a user base Good fit if you want A micro-SaaS or dev-tool wedge in the webhook/debug space Something listable and demo-able in a 3-minute video A codebase you can rebrand, add Stripe/Lemon Squeezy, and ship Not included My Supabase project or API keys Hosted SaaS on my domain after sale (demo can be taken down) Feature parity with large webhook platforms Price: $1,999 (open to reasonable offers) Happy to walk through deploy and handoff after sale.
Next step: <p>Monetize : Wire Stripe or Lemon Squeezy to the existing Pro plan flag; tune free vs Pro limits in the database.</p><p>Product : Custom domains (<code>cosmichook.app</code> / <code>api.</code>), team accounts, more retention tiers, Slack alerts, Stripe-style signature verification docs.</p><p>Go-to-market : Target indie hackers and backend devs (Stripe/GitHub webhooks), content SEO (“webhook replay tool”), integrations marketplace listings.</p><p>Ops : They already get Worker ingest/replay, retention cron, and optional Resend alerts—scale on their Cloudflare + Supabase bill.</p><p>Positioning : Stay a focused inspect + replay tool; don’t try to out-Hookdeck enterprise features unless they want to raise scope and price.</p>
For sale
Asking price: $1,999 USD
What's included
All related design work, Source code, All related data
Full repo (web/, worker/, Supabase migrations), README + SideProjectors launch checklist, Loom/demo URL for evaluation. Buyer deploys on their Supabase and Cloudflare; I’ll include a short written handoff (and can do one deploy call if we agree). No seller API keys or service role in the repo. Live demo on my infra is for testing only and can be retired after sale.
Reason for selling
Cosmic Hook does what I needed for a listing-ready webhook MVP, but I’m not going to run sales and support on it long term. I’d rather sell the codebase to someone who wants a dev-tool or micro-SaaS wedge and will connect Stripe, marketing, and their own infra.
Project metrics
Average Monthly Visitors: Pre-launch
Average Monthly Revenue: Pre-revenue
Average Monthly Downloads: Pre-launch / New project
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