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Stratum
10.11.2026
Stratum is the protocol that miners use to communicate with a mining pool. It runs over a TCP connection and exchanges short JSON messages.
How it works
- The miner connects to the pool and authorizes with a wallet address or account username and a worker name.
- The pool sends it jobs: the data to hash and the share difficulty.
- The miner sends back shares, solutions that meet the share difficulty. The pool counts them to measure the miner's work and pays for them according to its payout scheme.
The stratum address
In a miner you specify the pool as a stratum address: a host and a port, for example stratum+tcp://host:port. With an encrypted connection the prefix is stratum+ssl:// (see SSL). The exact address and ports for each coin are on its pool page.
Common problems
If the miner can't reach the pool, check the address and port first, then your DNS, firewall and VPN. High latency leads to more stale shares, so connect to the nearest server.
