20 checks in Technical Foundation & Rendering. Automated Its subsection has a live automated checker in the engine.
| ID | Check | Passes when |
|---|---|---|
| 1.5.01 | GET / and follow redirects | <= 1 redirect |
| 1.5.02 | HEAD / and follow redirects | <= 1 redirect |
| 1.5.03 | GET homepage with www version | Consistent redirect to chosen canonical |
| 1.5.04 | GET homepage without www version | Consistent redirect |
| 1.5.05 | GET homepage via HTTP | Redirect to HTTPS |
| 1.5.06 | GET homepage via HTTPS | 200 |
| 1.5.07 | GET internal service page | <= 1 redirect |
| 1.5.08 | GET internal location page | <= 1 redirect |
| 1.5.09 | Validate that 301 is used (not 302) for canonical redirects | 301 |
| 1.5.10 | Validate trailing slash normalization | Consistent |
| 1.5.11 | Validate lowercase URL normalization | Consistent |
| 1.5.12 | Validate no redirect loops | None |
| 1.5.13 | Inspect redirect chain length for all sitemap URLs | <= 1 hop |
| 1.5.14 | Inspect redirect chain length for all internal links | <= 1 hop |
| 1.5.15 | Inspect redirect chain length for canonical URLs | <= 1 hop |
| 1.5.16 | Detect conflicting redirects (A → B, B → C, C → A) | None |
| 1.5.17 | Detect duplicate redirects targeting the same endpoint | None |
| 1.5.18 | Validate redirect consistency across UA types | Same behavior |
| 1.5.19 | Validate canonical URLs resolve without redirect | 200 |
| 1.5.20 | Compute total redirect-graph health composite score | >= 90% |
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