An archival Bitcoin Core node retains every historical block forever, enables txindex=1 for arbitrary transaction lookup by txid, and powers block explorers, Electrum servers, BTCPay full lookups, mining accounting tools and chain-analysis adjacent services. AnubizHost provisions archival nodes with optional 2TB upgrade from $140/mo plus storage add-on.
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We implement, you ship. Async, documented, done in days.
Archival mode (no pruning, txindex=1) is the precondition for any service that needs to look up arbitrary historical transactions: Electrum Personal Server, Electrs, Fulcrum, Mempool.space, full BTCPay Server with payment history, and any block explorer backend.
Without txindex, Bitcoin Core can only look up unspent transactions through the UTXO set. With txindex, you have full historical access at the cost of ~30GB extra index storage and some extra IO during the initial sync.
In 2026 the chain itself crosses 600GB. txindex adds ~30GB. UTXO set ~12GB. BIP157 compact block filters (blockfilterindex=1) add another ~10GB. Plan 700-750GB for archival. Our default 1TB NVMe handles this with 12-18 months of growth headroom. For longer horizons add the 2TB upgrade.
Archival nodes do extra IO during reindex operations. Our NVMe class is designed for this load - we have benchmarked full reindex-chainstate completion in 14 hours on the default hardware.
Power your own Electrs/Fulcrum to back Electrum wallet. Run Mempool.space for fee estimation. Host BTCPay Server with full payment history. Serve historical APIs to your own tooling.
$140/mo + optional storage upgrade. See Electrs hosting, Fulcrum, Mempool.space self-host.
Skip the research. Tell us what you need, and we'll scope it, implement it, and hand it back — fully documented and production-ready.