Session 15: CSP bugs fixed, QA passed, marketing materials ready

projects/business/marketing/show-hn.md

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+# Show HN: DocFast – HTML/Markdown to PDF API with built-in templates
+
+I built a simple API for generating PDFs from HTML or Markdown. It's at https://docfast.dev
+
+**Why I built it:** Every time I needed to generate invoices, reports, or receipts in a side project, I'd end up wrestling with wkhtmltopdf configs or spinning up a headless browser. I wanted a single API call that just works.
+
+**What it does:**
+- Send HTML or Markdown, get a PDF back
+- Built-in templates for common docs (invoices, receipts, reports)
+- Supports custom CSS, headers/footers, page sizes
+- Fast — most PDFs generate in under 2 seconds
+
+**Quick example:**
+
+```bash
+curl -X POST https://docfast.dev/v1/convert/html \
+  -H "Authorization: Bearer YOUR_API_KEY" \
+  -H "Content-Type: application/json" \
+  -d '{"html": "<h1>Hello World</h1><p>Generated with DocFast.</p>"}' \
+  --output hello.pdf
+```
+
+**Pricing:** Free tier gives you 100 PDFs/month (no credit card). Pro is $9/mo for 10,000 PDFs.
+
+Built it solo. Would appreciate any feedback on the API design or docs (https://docfast.dev/docs).