This site is not affiliated with or endorsed by Vercel, Inc. Read the docs, then deploy or run each experiment yourself.
Developer Tools

Sitemap Health Lab

Fetch a sitemap URL, sample <loc> links, and check status codes with a rate-limited delay between requests.

Run this experiment yourself

Demos are not embedded on this site. Deploy a standalone copy on Vercel or run the experiment app locally.

Local development

cd apps/experiments/sitemap-health-lab
pnpm install
pnpm dev

Then open http://localhost:3010.

This is an experimental demo. Use it as a starting point for your own projects.

Sitemap Health Lab fetches a sitemap XML, extracts up to N <loc> URLs, then checks each status with a minimum delay between requests. No AI provider required.

Features

  • Sitemap loc extraction – http(s) only
  • Rate-limited checks – MIN_DELAY_MS between link fetches
  • Summary stats – ok / failed / avgMs

API Reference

POST /api/health

{ "sitemapUrl": "https://vercel.com/sitemap.xml", "sample": 8 }
StatusCause
400Validation / upstream / empty input

Implementation Details

Pure helpers in logic.ts

Caps, parsers, and clamps live in the experiment folder and are covered by logic.test.ts.

Route Handler

POST /api/health validates input, applies fetch/parse limits where relevant, then returns JSON.

Use Cases

  • Learn composition patterns for this lab’s stack.
  • Prototype before wiring production auth and quotas.
  • Deploy the standalone app as a reference implementation.

Limitations

  • Demo-scale caps on input size and output counts.
  • No auth / rate limits on public deploys.
  • Treat outputs as drafts, not production truth.

Use in your project

Copy the Route Handler and logic.ts helpers from apps/experiments/sitemap-health-lab/. Wire your own persistence and auth as needed.

Deployment

Deploy on Vercel

Local Development

cd apps/experiments/sitemap-health-lab
pnpm install
pnpm dev

Configuration

VariableRequiredPurpose
NEXT_PUBLIC_SITE_URLNoOptional public site URL

Vercel / Next.js Features Used

  • Route Handlers
  • Zod

Next Steps

On this page