Bitcoin, queried.

A free, interactive playground for Bitcoin Core's JSON-RPC API, and on-chain signal intelligence built from our own full node, so operators, traders, and analysts stay better informed.

Backed by our archival Bitcoin Core full node on bare-metal hardware in NYC. No third-party data, no rate-limited free-tier games. Direct from the chain.

Browse 162 RPCs Live Fee Pressure
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Featured story · 4 min read

The Genesis Block

January 3, 2009. Block zero. The first 50 BTC ever mined, with a newspaper headline embedded in the coinbase as a permanent timestamp.
Live signal ● live

mempool / fees

Low
block
949,552
5sat/vB
next block
Next block 5/vB
Half hour 4/vB
Hour 3/vB
Economy 2/vB
Mempool floor 1/vB

10,504 tx · 3.48 blocks backlog · 48s ago

See live fee pressure → API docs

Reports

All reports →

Live state and historical charts for every metric ChainQuery surfaces. Backed by our own node, not third-party APIs.

Fee Pressure live

Block-by-block mempool fee state with tip-anchored block stack. Auto-refreshes every 30s.

Mempool

Live tx count, fee-rate histogram across 6 bands, smartfee estimates, mempool-size history.

Difficulty

Mining difficulty, epoch progress, estimated next-retarget change. 24h/7d/30d/90d windows.

Supply

Circulating BTC, percent mined, current subsidy, annual inflation. Asymptotic cap: 20,999,999.9769.

Halvings

Countdown to halving 5, supply curve to 21M, 209-month fee-share chart.

HODL waves

Every UTXO bucketed by age across 12 ranges (24h to 10y+). Stacked-area history.

Bitcoin distribution

Balance buckets across 56M+ addresses, treemap visualization, weekly dumptxoutset.

What's here

RPC playground

All 162 Bitcoin Core RPCs documented (plus historically-removed ones); safe ones executable directly against our node.

Browse RPCs →

Lists free

Bitcoin Rich List, exchange addresses, mining pools, lost coins, Satoshi's wallet. Curated address sets.

Browse lists →

Stories new

Walk through pivotal Bitcoin moments (genesis, the pizza tx, the inflation bug, the halvings) with live RPC calls embedded inline.

Read stories →

Fee Pressure API

Sub-second mempool fee signals over HTTP. Bearer auth. Same data vendors charge $300+/mo for.

API docs →

Educational API free

Read-only JSON endpoints for tip height, halving countdown, mempool summary, supply, difficulty, price.

Endpoint docs →

Address Monitoring Soon

Real-time inflow / outflow signals on tagged addresses: exchanges, custodians, mining pools, sanctioned wallets, user-provided lists.

Get notified →