isdayoff.ru website report
isDayOff()
Last scanned
Overall score
Fair
About isdayoff.ru
isdayoff.ru is a website. It describes itself as “API производственного календаря”. It is also on GitHub.
Score profile
Top issues to fix
9 issues found · 3 high priority
Missing Strict-Transport-Security header
SecurityAdd HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.
Missing Content-Security-Policy header
SecurityAdd a CSP to control which sources can run scripts — the strongest single defense against XSS.
No H1 heading found
SEOAdd exactly one H1 describing the page's main topic — it anchors the document outline for search engines and screen readers.
Missing X-Content-Type-Options header
SecurityAdd X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.
Missing X-Frame-Options header
SecurityAdd X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.
Missing canonical link
SEOAdd <link rel="canonical"> so search engines know which URL variant to index.
+3 more issues — details in the sections below.
How it compares
isdayoff.ru scores higher overall than 27% of the 163,243 sites we have scanned.
vs. All scanned sites
163,243 sitesThe dot is this site; the tick is the typical (median) score for the group. The number on the right is the percentile: the share of the group this site scores above.
Technology stack
isdayoff.ru is built with Nginx.
Servers (1)
Hosting & DNS
- IP address
- 188.72.103.4
- ASN
- —
- IPv6
- Not supported
- HTTP
- HTTP/2
Show DNS record values
- A
- 188.72.103.4
- CNAME
- a2d00d5759719929.topology.gslb.yccdn.ru
TXT record contents are not republished; only their count is shown.
Security
isdayoff.ru uses TLS 1.3 with a certificate valid for 36 more days and sets 0 of 6 recommended security headers.
Security headers0 of 6 set
- HSTSForces HTTPS
- CSPBlocks injected scripts
- X-Frame-OptionsStops clickjacking
- X-Content-TypeStops MIME sniffing
- Referrer-PolicyLimits URL leakage
- Permissions-PolicyRestricts browser features
TLS certificate
- Names covered
- 2
- Cookies set
- 0
Email security
isdayoff.ru does not receive email, but does not fully block others from sending mail in its name.
No MX records: this domain does not receive mail.
- SPFNot set
No SPF record: anyone can claim to send mail from this domain.
- DMARCNot set
No DMARC policy: forged mail is not told to be rejected.
- MTA-STSNot set
Not published; mail to this domain can be downgraded to plaintext.
- BIMINot set
Not published (optional).
Performance & carbon
isdayoff.ru scores 90/100 for performance, with an estimated load time of 2.4 s. A visit emits an estimated 0.09 g of CO2 (grade A+).
Page weight
- HTML 14.4 KB
- JavaScript 114 KB
- CSS 104 KB
- Est. load
- 2.38 s
- Response
- 2.38 s
- Scripts / CSS
- 6 / 2
Carbon per visitA+
0.09 g CO2 per uncached view
Estimate from the Sustainable Web Design model. HTML, JavaScript and CSS only; images, video and fonts are not measured. Treat it as a lower bound for comparing pages, not an audit.
SEO & accessibility
isdayoff.ru scores 65/100 for SEO and 90/100 for accessibility, with 5 SEO issues to fix.
Heading structure
No H1 found.
Image alt text
1 images · 0 without alt text · 0 lazy-loaded
Links
- Internal 16
- External 5
SEO issues5
- Missing canonical link
- No H1 heading found
- No structured data (JSON-LD) found
- robots.txt not found
- sitemap.xml not found
Accessibility issues1
- No H1 heading found
Technical details
Page metadata, social tags, crawl files and scan information.
Meta tags
- Title
- isDayOff()
- Description
- API производственного календаря
- Canonical
- Language
- en
- Robots meta
Crawl files
- robots.txt
- Not found
- Disallow rules
- 0
- sitemap.xml
- Not found
- URLs in sitemap
- 0
Structured data
No JSON-LD types declared.
- Microdata items
- 1
- RDFa items
- 0
Scan
- Final URL
- https://www.isdayoff.ru
- HTTP status
- 200
- Redirects
- https://isdayoff.ru → https://www.isdayoff.ru
- Scanned
- Aug 24, 2026, 1:23 PM
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Frequently asked questions about isdayoff.ru
- What is isdayoff.ru?
- isdayoff.ru is a website. It describes itself as “API производственного календаря”. It is also on GitHub.
- What technology does isdayoff.ru use?
- isdayoff.ru is built with Nginx.
- Is isdayoff.ru secure?
- isdayoff.ru uses TLS 1.3 with a certificate valid for 36 more days and sets 0 of 6 recommended security headers.
- Is isdayoff.ru protected against email spoofing?
- isdayoff.ru does not receive email, but does not fully block others from sending mail in its name.
- How does isdayoff.ru compare with similar sites?
- isdayoff.ru scores higher overall than 27% of the 163,243 sites we have scanned.
- What is isdayoff.ru's overall score?
- isdayoff.ru has an overall SiteGraph score of 76/100, combining SEO (65), performance (90), security (65) and accessibility (90).
Open Graph & Twitter