Quick Answers

What Does "407 Proxy Authentication Required" Mean?

A 407 error means the proxy wants credentials and did not get valid ones. Check the username, password, format and IP whitelist.

By Team of Monkeys Editorial Updated 1 min read Affiliate disclosure

This guide contains affiliate links to Geonode, Webshare and Rayobyte. If you buy through them we may earn a commission, at no extra cost to you.

What Does 407 Proxy Authentication Required Mean illustration: a 407 error means the proxy wants credentials and did not get valid ones 3jdej38j4

The short answer

407 is the proxy's version of "who are you?". The proxy server, not the website, is refusing your request because it did not receive valid credentials in the Proxy-Authorization header.

Quick fixes

  1. Re-copy the username and password. Trailing spaces are the most common cause.
  2. Check the format. Most tools want http://user:pass@host:port. URL-encode special characters in the password.
  3. Check the whitelist. If you use IP whitelisting, your current IP may have changed.
  4. Check the account. Expired plans and used-up bandwidth often show up as 407.
Proxy error, but it is fixable (animated GIF) 3jdej38j4
Proxy error, but it is fixable. GIF via GIPHY

Also known as

Proxy authentication error, proxy auth required, HTTP 407.

Learn more

Affiliate disclosure: Team of Monkeys is an affiliate of Geonode, Webshare and Rayobyte. Links and banners marked as sponsored, and links to Geonode, Webshare and Rayobyte in the text, use our referral links, and we may earn a commission if you buy through them, at no extra cost to you. Our explanations and comparisons are written to be useful whichever provider you choose.

Editorial note: Proxy providers change their pools, features and prices often, so treat any figures here as typical ranges at the time of writing and confirm current terms with the provider before you buy.
Keep reading

Related proxy guides

Setup & TroubleshootingCommon Proxy Errors and How to Fix ThemA troubleshooting guide to common proxy errors: 407, 403, 429, 502, 503, 504, ERR_PROXY_CONNECTION_FAILED, ERR_TUNNEL_CONNECTION_FAILED, timeouts, SSL errors and SOCKS failures. Proxy BasicsProxy Authentication Methods: Username/Password vs IP WhitelistingHow proxy authentication works, the pros and cons of user:pass credentials versus IP whitelisting, how to format credentials for different tools, and how to fix 407 errors. Quick AnswersWhat Does host:port:user:pass Mean?host:port:user:pass is the common way providers hand out proxies: the server address, the port, then your username and password, separated by colons. Quick AnswersWhat Is IP Whitelisting for Proxies?IP whitelisting lets you use a proxy without a password: you register your own IP with the provider, and the proxy accepts any connection that comes from it. Quick AnswersWhat Is Browser Fingerprinting?Browser fingerprinting identifies you from your browser's settings, such as screen, fonts, graphics card and language, without cookies. A proxy does not change it. Quick AnswersWhat Is an Antidetect Browser?An antidetect browser runs many separate browser profiles, each with its own fingerprint, cookies and proxy, so accounts cannot be linked to each other.
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