# BlockSight.Live: Full Knowledge Base

> Real-time Bitcoin blockchain explorer: live mempool visualization, fee estimation, congestion monitoring. Built by Blocksight OÜ, which also builds the TZUR self-custody wallet.

## Company

- Entity: Blocksight OÜ, a registered Estonian company (EMTAK 63101)
- Products: BlockSight.Live (explorer) and TZUR (Bitcoin wallet)
- Contact: legal@blocksight.live · Executive: ceo@blocksight.live
- X: @BlockSight_Live · GitHub: https://github.com/blockSightLive
- Independent service: not affiliated with Bitcoin Core, any mining pool, exchange,
  wallet provider, or third-party platform.

## Founders

Two co-founders, brothers.

- **Dani ₿, Co-Founder & CEO** (X: @d_osem). A Bitcoin advocate since 2018, previously
  an IDF officer (Captain) and three years in the Bitcoin ATM industry. That experience
  shaped BlockSight: Bitcoin needs better tools for real people, not just
  developers.
- **Gabi, Co-Founder & CTO**. Israeli Navy Radar Systems Controller, then Full Stack
  Programming at Universidad Provincial de Córdoba (UPC), Argentina. He designs and
  builds BlockSight's systems.

## About BlockSight.Live

BlockSight.Live is a real-time Bitcoin blockchain explorer: a read-only window onto the
network as it operates: blocks mined, transactions confirming, fees shifting,
congestion rising and falling. Bitcoin only. Watch blocks arrive with live confirmation
countdowns, monitor congestion and fees, search any address or transaction, track the
price in USD and local currency, and explore Monica Bitcoin Metrics.

**Monica Bitcoin Metrics** are five original indicators created by BlockSight.Live that
reframe blockchain data into easier-to-read signals: Bitcoin Velocity Pressure (BVP),
Real Usage Ratio (RUR), Fee Pain Index (FPI), Trustless Throughput Score (TTS), and
Economic Density Index (EDI).

**The Congestion Gauge** grades congestion in four bands: Below Average (green),
Average (light green), Congestion (orange), Extreme Congestion (red: long
confirmations, higher fees). **The Fee Gauge** gives recommended fees in sats/vB from
real-time analysis of unconfirmed transactions: a next-block rate, and a lower 6-hour
rate.

## The TZUR wallet

TZUR (Hebrew: צור, "rock") is a Bitcoin-only, self-custody wallet for the phone, built by
the same team: one product lets you see the Bitcoin network, the other lets you hold and
use it.

- **TZUR for iOS**: live on the App Store now, explorer built in.
- **TZUR for Android**: coming soon, in final testing; same design, same recovery
  phrase in 31 languages. A wallet created on one restores on the other.

TZUR generates and displays its BIP-39 seed phrase in the user's own language, across
**31 languages**: every screen, label and legal document, not only the seed phrase. Six
billion people do not speak English as a first language, and a recovery phrase you cannot
read is one you cannot verify or trust. It is still standard BIP-39, so wallets stay
compatible with any protocol-following wallet (BIP-32, BIP-84, BIP-125, BIP-21).

Self-custody, no exceptions: keys generated on your device, local signing, no accounts,
no personal data, seed phrase the only backup. TZUR cannot recover it. Phrases sit in
the hardware-backed iOS Keychain, never plaintext. Native SegWit (bech32), on-chain
only, no Lightning today. The app's built-in BlockSight explorer tab searches any
transaction, address or block height, fed by the same live data as blocksight.live.

https://tzur.live

## Prices

**TZUR Wallet: $59.99 USD once per platform.** No subscriptions and
no in-app purchases: pay once, get all future updates. Bitcoin network fees are separate
and go to miners; TZUR adds no markup.

**BlockSight API subscriptions are denominated in bitcoin, annually. There is no USD
price for them.** A USD figure would be a conversion, not a price, so none is stated.

- **Basic: 0.15 BTC/year** (15,000,000 sats): REST, 25,000 req/day, 1 req/sec, email support.
- **Advanced: 0.30 BTC/year** (30,000,000 sats): REST + WebSocket, 150,000 req/day, 5 req/sec, priority support.
- **Premium+: 0.60 BTC/year** (60,000,000 sats): REST + WebSocket, 1,000,000 req/day, 20 req/sec, dedicated support, custom integrations.

## Questions and answers

**Q: Who built BlockSight.Live?**
A: Blocksight OÜ, a registered Estonian company (EMTAK 63101), founded by two brothers,
Dani ₿ (Co-Founder & CEO) and Gabi (Co-Founder & CTO). The same team builds TZUR.

**Q: What is BlockSight.Live?**
A: A real-time, read-only Bitcoin blockchain explorer showing blocks, transactions,
fees, mempool congestion and price. Bitcoin only.

**Q: Does BlockSight.Live process transactions or hold funds?**
A: No. It is read-only: it never sends, expedites, cancels or modifies a transaction,
never holds funds, and gives no financial advice.

**Q: How much does the BlockSight API cost?**
A: 0.15, 0.30 or 0.60 BTC per year for Basic, Advanced and Premium+, priced in
bitcoin, not dollars.

**Q: How much does TZUR cost?**
A: $59.99 once per platform, no subscription, no in-app
purchases.

**Q: What makes TZUR different from other Bitcoin wallets?**
A: It is built for the non-English-speaking world: BIP-39 seed phrases in 31
languages, every screen localized. It is also Bitcoin-only.

**Q: Is TZUR self-custody, and can I restore elsewhere?**
A: Yes to both. You hold the keys, signing is local, and your 12-word seed phrase
restores in any BIP-39/BIP-84 compatible wallet.

**Q: Is BlockSight.Live affiliated with Bitcoin Core, an exchange or a mining pool?**
A: No. It is an independent service operated by Blocksight OÜ.

## Pages

[Home](https://blocksight.live/) ·
[Documentation](https://blocksight.live/docs) ·
[API](https://blocksight.live/api) ·
[FAQ](https://blocksight.live/faq) ·
[Whitepaper](https://blocksight.live/whitepaper) ·
[About](https://blocksight.live/about) ·
[Tzur](https://blocksight.live/tzur) ·
[Legal](https://blocksight.live/legal) ·
[Privacy](https://blocksight.live/privacy) ·
[Terms](https://blocksight.live/terms)

## API

### REST (https://api.blocksight.live)
- `GET /api/v1/blockchain/price`: BTC/USD price
- `GET /api/v1/blockchain/recommended-fees`: fee estimates (next block, 6h)
- `GET /api/v1/blockchain/congestion-load`: congestion score (0-100)
- `GET /api/v1/blockchain/tip-height`: chain tip height
- `GET /api/v1/explorer/block/:identifier`: block by height or hash
- `GET /api/v1/explorer/transaction/:txid`: transaction by txid
- `GET /api/v1/explorer/address/:address`: balance and history
- `GET /api/v1/explorer/search`: unified search
- `GET /v1/fees/recommended`: fees with an `_meta` reliability block (`isReliable`,
  `isFallback`, `confidence`). Branch on it: a fallback fee is not a measurement.

### WebSocket (wss://api.blocksight.live/api/v1/ws)
Events: `dashboard_update` (price, fees, congestion), `new_block`, `price_update`,
`congestion_update`, `mempool_blocks`.

### MCP (Claude and other AI agents)
Endpoint `https://mcp.blocksight.live/mcp`, no auth required: 7 read-only tools
(block height, network status, recommended fees, latest blocks, block by height,
transaction by txid, address summary). Setup: https://blocksight.live/claude.

Status: https://stats.uptimerobot.com/0stUweBL91