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  6. HTTP Headers 

3W1 strongly recommends „White Hat SEO” – learn why it's good for your website, while „Black Hat SEO” is not.

16 HTTP Headers from https://www.nasa.govWith a configurable User Agent String, referring URL (referer) and cookies


  1. HTTP/2 200
  2. server: nginx
  3. date: Wed, 22 Oct 2025 18:13:07 GMT
  4. content-type: text/html; charset=UTF-8
  5. vary: Accept-Encoding
  6. host-header: a9130478a60e5f9135f765b23f26593b
  7. x-launch-status: Go Flight!
  8. x-frame-options: SAMEORIGIN
  9. link: <https://www.nasa.gov/wp-json/>; rel="https://api.w.org/"
  10. link: <https://www.nasa.gov/wp-json/wp/v2/pages/128943>; rel="alternate"; title="JSON"; type="application/json"
  11. link: <https://www.nasa.gov/>; rel=shortlink
  12. x-rq: hhn2 0 40 9980
  13. accept-ranges: bytes
  14. cache-control: max-age=300, must-revalidate
  15. x-cache: STALE
  16. strict-transport-security: max-age=31536000;includeSubdomains;preload

Latest HTTP Headers requests list 30 URLs with HTTP status codes


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