The deepest history of the three, with two-of-three multisig, a reputation record that survives rotation, and a dispute desk that closes on time.
The primary onion for Nexus Market, followed by backup mirror URLs. All addresses route to the same shop and the same account. Copy any one of them and paste into Tor Browser.
Nexus Market ships the following as defaults, not as extras: Two-of-three multisig escrow, Two-factor sign-in, Rotating mirrors, Monero by default, Persistent vendor reputation, Tracked dispute arbitration. These are what the marketplace does out of the box for a new buyer with no configuration. Every one of them addresses a known failure mode from the last ten years of Tor markets.
Start with the primary. If your Tor circuit is slow on the primary, move to a backup. All URLs on this page route to the same back-end, so switching does not lose your account or open orders. If every URL is slow at once, that is usually a DDoS wave — new circuit and try again in a few minutes.
Every mirror on this page came out of an operator PGP-signed rotation announcement. If you want to verify the URL yourself, import the operator public key from the market’s own /pgp page, then run gpg --verify on the signed rotation message. If verification returns Good signature, the URL is genuine.
The captcha check on the login page is the second layer. The onion address is baked into the captcha image itself. Compare the address at the bottom of the picture with your URL bar. Mismatch means close the tab.