← Back to browse

RFC Esolang

This launch may no longer be active. Its site did not respond when we last checked on June 24, 2026.

Show HN: RFC Esolang – RFCs as executable programs

Developer Tools
Switzerland Estimated origin: Switzerland

Added April 12, 2026 · Last analysed April 12, 2026 · via Hacker News · 67% unique tagline

Own this Launch?
Screenshot of RFC Esolang

StackScope is a free public catalogue of indie launches. We find launches on Product Hunt, Hacker News and similar feeds, then crawl each site to detect its tech stack and score it for launch readiness: DNS, security headers, SEO basics. This page is what we saw on 12 April 2026; the live site may have changed since.

RFC Esolang is missing several launch fundamentals. Main gaps: missing several security headers, incomplete legal pages, and no sitemap.

Launched on Hacker News on April 1, 2026. Our crawler found 1 technology on this site, covering servers. The stack includes nginx.

If you own this site, refresh the snapshot and see the full fix list any time →

1.4
StackScope Score
Poor
11/100 Launch Readiness
Needs work
0/6 Security Headers
Poor
0/3 Legal
Missing
1/2 Crawl files
Partial
Vibe Score 0 · No AI signals
How much the site looks AI-generated. Informational pattern-match signal, not a verdict. Does not feed the StackScope Score. See which fingerprints fired →

Tech Stack (1)

Infrastructure
Server nginx (2)

Infrastructure

DNSSEC
Not enabled
DNS responses unsigned. Cache-poisoning vulnerable.
SSL Certificate
Let's Encrypt
Valid 26 Mar 2026 to 24 Jun 2026
Certificate as captured in this snapshot, not a live check.

Email Security

✓
SPF -all Strict (-all). Strong.
?
DKIM Not detected at common selectors. Your provider may use a custom one.
✗
DMARC Not published. Receivers fall back to permissive defaults.
?
MTA-STS Not deployed. Mail to your domain can be downgraded to plaintext en route.
?
TLS-RPT Not configured. You won't hear about silent SMTP TLS handshake failures.

Readiness Breakdown How?

⚠
Custom title and meta description (partial) missing meta description
- Open Graph tags (title, image, description)
- Responsive viewport meta tag
- Canonical URL declared
- Twitter card meta tags
- Favicon present
- Semantic HTML (nav, main, article)

AI Stance

No AI stance declared
✗ llms.txt published
✓ No AI bots blocked in robots.txt
Content-Signal
? No directive declared
Link headers
? None advertised

Well-Known Files

✓ robots.txt
✗ sitemap.xml
✗ security.txt
✗ llms.txt
✗ ads.txt
✗ humans.txt

Legal

? Privacy Policy not detected
? Terms of Service not detected
Detection works best on English language sites.

Security Headers (0/6)

✗
Referrer-Policy
✗
X-Frame-Options
✗
Permissions-Policy experimental (check browser support)
✗
X-Content-Type-Options
✗
Content-Security-Policy
✗
Strict-Transport-Security
–
X-XSS-Protection deprecated (use Content-Security-Policy)

Performance

171ms response time
Faster than 77% of sites

Build

0 JS files
0 CSS files
0 Third-party domains
Something not look right? If a technology shown here is wrong or out of date, email [email protected] and we'll review it.