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Market data for crypto and tokenized assets
Crypto and RWA Market Data.
One Price per Asset.
Blocksize provides aggregated price feeds for crypto and tokenized assets. Each feed turns prices from 70+ exchanges into one price per asset and arrives through one API, from a publisher live in eight oracle networks.
LIVE
- BTC/USD REAL-TIME VWAP
- ETH/USD REAL-TIME VWAP
- SOL/USD REAL-TIME VWAP
Validated on-chain. Delivered off-chain.
Every price Blocksize publishes into oracle networks is checked by independent node operators before it is accepted. The same feeds are delivered off-chain through one API.
- 9,000+ crypto pairs
- 40 RWA feeds
- 70+ exchanges, CEX and DEX
- 8 oracle networks
- <250 ms latency over WebSocket
Two products
Crypto Feeds and RWA Feeds.
Every price type links to its published methodology.
Crypto feeds
One price per pair from 70+ exchangesRWA feeds
The tokenized market price, 24/7RWA perpetuals
Price feeds for perpetuals on real-world assets, next to the RWA feeds.
- Perpetuals
- Real-world assets
- Next to the RWA feeds
- One API
- Launch notification
- No date yet
Price types
-
- Crypto
Real-Time VWAP
A continuously updated volume-weighted average of executed trades across all accepted venues. The live reference price for a pair.
Real-Time VWAP methodology -
- Crypto
- RWA
Bid/Ask
Bid and ask are aggregated separately, weighted by quoted size.
Bid/Ask methodology RWA methodology -
- Crypto
State price
A price read from DEX pool reserves, for tokens that trade mainly on decentralised exchanges and have little trade data.
API documentation -
- Crypto
Historical prices
A closing price every thirty minutes, published five seconds after the interval, and a 24-hour VWAP. Fixed reference prices for marks, NAV and reporting.
30-Minute VWAP methodology 24-Hour VWAP methodology -
- Crypto
Trades
Raw executed trades, tick by tick, across venues. For research, surveillance and own analytics.
API documentation
Why aggregate
Crypto has no consolidated tape, and tokenized stocks trade on many venues at once. The same asset shows a different price on every exchange, and the gaps widen when accuracy matters most. Blocksize aggregates into one price per asset and filters the outliers. One price, whole market.
25%of the time within fair valueBlocksize study, 23 exchanges
25%
of the time within fair value
10+ bps
divergence in stress
99.9%
uptime guarantee
Methodology
How One Price Is Made.
Crypto
- 01 Sources
70+ centralised and decentralised exchanges. Executed trades and top-of-book quotes.
- 02 Filter
Outlier trades filtered, venues that drift from the market excluded.
- 03 One price
One price per pair, in five price types.
- 04 Delivery
Published into eight oracle networks, where node operators check every update. The same feed over WebSocket, HTTP on Enterprise and the MCP server.
RWA
- 01 Sources
Centralised exchanges trading tokenized stocks from Ondo, xStocks, bStocks and others.
- 02 Filter
During US market hours each quote's midpoint is checked against a benchmark. Only quotes within the permitted deviation count.
- 03 One price
Bid and ask aggregated separately, weighted by quoted size, with the mid between them.
- 04 Delivery
WebSocket through the Bid/Ask endpoints. API only today, redistributable.
Solutions
Built for Four Teams.
LIVE
- BTC/USD REAL-TIME VWAP
- Oracles Prices to publish on-chain at every hour, with redistribution rights. RWA feeds for tokenized stocks, gold and silver. For oracles Update #4,118,203 8 networks · accepted
- Business Reproducible prices for NAV, best execution, risk and surveillance. For business 30m close14:30 UTC BTC/USD76,904.20
- Startups One API for crypto and tokenized stock prices. For startups Portfolio BTC0.42 ETH3.1
- Developers One call. Whole market. WebSocket, REST and an MCP server. For developers ws.subscribe(BTCUSD) { price: 77194.11, t: 14:41:08.207 }
By use case
Valuation and NAV
30-minute and 24-hour VWAP for NAV, fair-value marks and LP reporting, aggregated from 70+ exchanges.
Valuation and NAVOn-chain prices
Reference prices for collateral, liquidations and funding, published into eight oracle networks.
On-chain pricesRisk and backtesting
Aggregated real-time and historical prices from 70+ exchanges for risk limits, surveillance and backtests.
Risk and backtestingMark prices and settlement
One aggregated spot reference across 70+ exchanges for mark prices, funding and settlement.
Mark prices and settlementPublished Methodology.
- VWAP Real-Time VWAP A continuously updated volume-weighted average of executed trades across all accepted venues.
- BID/ASK Bid/Ask A volume-weighted bid and ask built from top-of-book updates.
- 24H 24-Hour VWAP The same aggregation over a 24-hour window.
- 30M 30-Minute VWAP A closing price struck every thirty minutes, published five seconds after the interval.
- RWA RWA feeds Sources, normalisation, benchmark check, aggregation, testing and market hours.
Behind the data
Market data FAQ
Common questions before integrating, from the feeds and their validation to redistribution and the free trial.
Aggregated prices for 9,000+ crypto pairs and for 38 tokenized stocks, gold and silver, built from 70+ exchanges and delivered over WebSocket, and HTTP on Enterprise. The crypto feeds are also published into eight oracle networks.
Crypto feeds in five price types: real-time VWAP, bid/ask, state prices, historical prices (30-minute and 24-hour VWAP) and trades. RWA feeds: one bid and ask with mid per tokenized stock, gold and silver, priced 24/7. RWA perpetuals are coming soon.
Crypto feeds aggregate trades and quotes for crypto pairs across centralised and decentralised exchanges. RWA feeds aggregate quotes for tokenized stocks, gold and silver from centralised exchanges only, with a benchmark check during US market hours.
Every price Blocksize publishes on-chain is compared by independent node operators with other publishers before it is accepted. Deviating submissions are rejected. RWA quotes are checked against a benchmark during US market hours.
Yes. Full redistribution rights are available, in Enterprise or by agreement.
Yes. 14 days on live data.
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Free trial
Test the Feeds on Live Data.
Every plan starts with a 14-day trial on live data.
- 01 Sign up
- 02 Get your key
- 03 Subscribe
ws.subscribe("BTCUSD", "realtime_vwap")