BTC Block Health Pulse

Keyless Ethereum chain-health monitor (public Blockscout v2, no API key): latest-block cadence, gas utilization, base-fee drift, reorg detection via parent-hash link verification, stateful KVS deltas. Read-only public data.

Keyless L2/sidechain block-health pulse (Polygon, Base, Optimism, Arbitrum via public Blockscout APIs, no key): per-chain cadence, gas utilization, base-fee + burnt-fee trends, reorg detection via parent-hash links, stateful KVS run-over-run deltas. Read-only public data.

Keyless Avalanche C-Chain block-health pulse (public C-Chain JSON-RPC, no API key): latest-block cadence, base fee + gas price in gwei, reorg detection via parent-hash link check, automatic fallback host + host-flip alerting. Stateful KVS run-over-run deltas. Read-only public data.

Keyless Bitcoin difficulty-retarget + hashrate-drift pulse (mempool.space v1, no API key): retarget progress, change preview, ETA, expected-blocks hashrate drift vs 2016-block window; blockstream.info fallback derives from tip block. Stateful KVS alerts: retarget, drift >20% x2 runs, host-flip.

Keyless multi-EVM network pulse via public Blockscout instances (no API key): avg block time, block height, native price + 24h change, latest-block gas, for Ethereum, Polygon and other public Blockscout chains. Stateful KVS deltas vs last run. One compact pulse per run.

Keyless Energi network pulse (public explorer.energi.network Blockscout v2, no API key): tip block/hash/difficulty, gas price (GWEI), avg block time, recent tx count, cadence window. Stateful KVS: reorg via block-hash regression, idle-gap & gas-spike alerts vs rolling medians. Read-only.

Live Bitcoin mempool snapshot: whale transfers (≥X BTC), pending tx count, fee bands (next-block / 30min / 1hr), recent block stats. mempool.space data. Time your BTC sends, catch whale moves. PPE $0.002/snapshot.

Keyless Bitcoin mempool + fees monitor (mempool.space, no API key): mempool depth (tx count, vsize, total fee), fee tiers, recent block cadence, 60m hashrate. Stateful KVS: repeat runs report mempool drift + fee-tier shifts; alerts on fee-spike / mempool-surge / hashrate-dip.

Keyless BTC whale-address monitor (public mempool.space + blockstream.info, no API key): watchlist of any BTC addresses - balance (chain+mempool), recent confirmed/mempool transfers, new-transaction and balance-change detection (stateful KVS), large-transfer alerts. Read-only public data.

Keyless Fantom (FTM, chain 250) L1 block-health pulse (public JSON-RPC, no API key): tip block + hash confirmation, gas price (GWEI), cadence median, reorg / tip-regression / idle-gap / gas-spike alerts vs rolling KVS medians. Not Polygon (137) - a distinct chain. Read-only public data.