What it means
Authentication is required and missing or invalid. Client errors mean the request cannot be fulfilled as sent. The server is working, but the address, permission or request rate is the problem.
Common causes
No or wrong credentials or token.
How to fix it
Provide valid credentials; check auth configuration.
If you are a visitor
Check the address for typos, sign in if the page needs it, and try again. If you believe the page should exist, tell the site owner.
If you own the site
Retrying the same request will not help until you change something (URL, credentials or timing). URLs that keep returning 404 or 410 are dropped from search results over time. 429 and 403 can block crawlers if they are too aggressive or blocked by a firewall. Run the HTTP status checker to see exactly what your URL returns, and use uptime monitoring to be told when it changes.
अक्सर पूछे जाने वाले प्रश्न
What does HTTP 401 mean?
Unauthorized: Authentication is required and missing or invalid.
Is HTTP 401 an error?
Yes. Client errors mean the request cannot be fulfilled as sent. The server is working, but the address, permission or request rate is the problem.
Does HTTP 401 affect SEO?
URLs that keep returning 404 or 410 are dropped from search results over time. 429 and 403 can block crawlers if they are too aggressive or blocked by a firewall.
Should I retry after HTTP 401?
Retrying the same request will not help until you change something (URL, credentials or timing).