Tor can help prevent the server your wallet contacts from learning your normal network IP address. BTC21 offers an Electrum onion service for people who want that additional network-privacy layer.
The short version
With a normal Electrum connection, the server can see your IP address at the network layer. With a Tor connection, your wallet reaches BTC21 through the Tor network and BTC21 sees the Tor connection instead. Tor improves network privacy, but it does not make Bitcoin activity magically anonymous or remove every wallet privacy tradeoff.
What Tor does
Tor is a privacy network. Instead of connecting directly from your device to a server, Tor sends the connection through multiple relays. The destination service receives the connection from Tor rather than directly from your home, mobile, office, or VPN IP address.
For a Bitcoin wallet, that matters because a server can otherwise associate its wallet queries with your network address. Tor helps separate those two pieces of information. It is not a replacement for good wallet practices, but it is a useful option for users who care about network-level privacy.
What it helps with
Reducing direct IP-address exposure to BTC21 and allowing access to a BTC21 service without using public DNS or a normal Internet route to that service.
What changes for you
Connections can be slower and occasionally less reliable. Your wallet must have Tor enabled, either internally or through a SOCKS5 proxy or supported companion app.
What is an onion service?
An onion service is a service reachable only through Tor at a long .onion address. Unlike a conventional hostname, an onion address is tied cryptographically to the service identity. It does not require BTC21 to open a new public Internet port or expose the server’s normal network address to Tor users.
BTC21 maintains separate onion identities for separate purposes. Its Bitcoin P2P onion service is not the same as its Electrum onion service. Using the right address and port for the intended service matters.
Why use Tor with an Electrum wallet?
Electrum-compatible wallets query a server for information related to wallet scripts, transaction history, balances, and transaction status. A public Electrum server does not hold your keys or funds, but it can observe the queries needed to serve your wallet.
Tor can hide your direct IP address from that server. It does not prevent the server from receiving the queries themselves, which is why users with significant privacy requirements should understand their wallet’s privacy model and consider their own infrastructure where appropriate.
How it works in practice
Enable Tor in your wallet or configure its Tor/SOCKS5 proxy.
Use the BTC21 Electrum onion hostname, port, and plaintext-over-Tor protocol.
Verify the complete onion address before saving; do not rely on partial strings or screenshots.
Keep your recovery phrase, private keys, wallet password, and wallet file private. BTC21 will never request them.
What Tor does not protect
Not total anonymity
Bitcoin’s public blockchain remains public. Transaction patterns, address reuse, wallet behavior, and information disclosed elsewhere can still reduce privacy.
Not a trust substitute
Tor hides the network path; it does not prove that a public server is trustworthy or prevent it from seeing Electrum queries. Verify information independently when it matters.
Tor also does not make a seed phrase safe to type into a website. Never enter a seed phrase, private key, or wallet password into BTC21 or into any server-configuration page.
How BTC21’s Tor Electrum service works
BTC21 runs a public Electrum service backed by its archival Bitcoin Core node and existing electrs index. The Tor endpoint routes through a BTC21 onion service to the same loopback-only Electrum listener. It does not create another blockchain copy, wallet, database, or public firewall exposure.
This is deliberately separate from the normal TLS setup. The standard setup page is best for ordinary connections; the Tor setup page provides the onion address, wallet instructions, and connection QR codes for users who have chosen a Tor-capable wallet path.