Frequently Asked Questions
What is Wumbo?
Wumbo is a Lightning Network explorer that indexes and categorizes nodes and channels on the Bitcoin Lightning Network. It provides search, tagging, and analytics tools to understand the network topology.
What are node tags?
Node tags are labels assigned by Wumbo based on node attributes like implementation software, fee policies, network connectivity, channel sizes, and more. Tags help categorize and filter nodes.
How often is the data updated?
Graph data (nodes and channels) is refreshed periodically via a scheduled indexer. Channel fees and closed channel data are also indexed on their own schedules.
What does the Wumbo tag mean?
By default, LND nodes cannot open channels larger than 16,777,216 sats (~0.17 BTC). Nodes that enable larger channels are tagged as "Wumbo". Nodes where all channels exceed this limit are tagged "100% Wumbo".
How are implementation tags determined?
Different Lightning implementations (LND, CLN, LDK, Eclair, Electrum) set different default values for features, fees, and HTLC limits. Wumbo uses these as heuristics to identify the likely implementation. This can be intentionally or accidentally fooled.
What is a Hermit node?
A node tagged "Hermit" does not advertise any connection URIs (no Tor or clearnet address). These nodes can still have channels but cannot accept new incoming connections from unknown peers.
What is PeerSwap?
PeerSwap is a protocol that lets Lightning nodes rebalance channels using on-chain BTC or Liquid BTC atomic swaps with their direct peers. Wumbo crawls the network to identify nodes advertising PeerSwap support.
How does the Tag Search work?
Tag Search lets you combine multiple tag conditions with AND/NOT logic. For example, find all CLN nodes that are NOT Tor-only and have zero base fees. Results update live as you change conditions.
Is there an API?
Yes. Wumbo provides a public REST API. Visit the API page from the navigation menu to see all available endpoints, parameters, and response formats.