Xmark offers a free public Nostr relay at wss://nos.xmark.cc. Similar to the Xmark browser extension for X/Twitter, this relay seamlessly marks your Nostr notes onto the Bitmark blockchain. This ensures permanent ownership and verification of your content. While the service is currently free, a small fee might be introduced in the future if blockchain space becomes limited.

The Bitmark blockchain offers a secure and reliable foundation for storing references to Nostr events. Its decentralized and censorship-resistant nature ensures your data remains safe and accessible. This makes it easier for users to find and explore relevant content within the Nostr ecosystem.

Xmark connects to the Nostr network through a dedicated account called 'Xmark Bridge.' This ensures your X/Twitter posts are seamlessly shared on Nostr, expanding your reach and connecting you with a wider community of users. You can find the Xmark Bridge's public key here: npub17dr8xyd5vy0tu7ejjg7284xtx3k4vlk4rfps3hp9s5v38zd42w4s5llnjh.