Hostnames for Electrum endpoints reachable over raw TCP. Provided as
a reference for Node-side consumers — the SDK's
ElectrumOnchainProvider only speaks WebSocket because it has
to run in browsers, so this map is informational only and not
consumed by any built-in provider.
Public Ark Labs Fulcrum instances expose:
port 50001 — plain TCP (Electrum protocol)
port 50002 — TCP + TLS (Electrum protocol)
port 50003 — WebSocket (Electrum-over-WS, see ELECTRUM_WS_URL)
Hostnames for Electrum endpoints reachable over raw TCP. Provided as a reference for Node-side consumers — the SDK's ElectrumOnchainProvider only speaks WebSocket because it has to run in browsers, so this map is informational only and not consumed by any built-in provider.
Public Ark Labs Fulcrum instances expose: