Making Digital Assets Bankable
Every asset on-chain deserves the right price. We make sure it gets one — delivering that accuracy to everyone building, trading, and valuing crypto.
Blocksize is a market data provider for crypto and tokenized assets. We aggregate prices from more than 70 exchanges in real time, delivered through one API. We publish into eight leading oracle networks, so our data quality is continuously proven by consensus.
Our clients and partners
Who Is Blocksize
We operate across the oracle value chain. Making DeFi more secure and accessible.
We operate publishers in all leading oracle networks, run the node infrastructure that delivers data on-chain, and aggregate the crypto market data that mission-critical use cases depend on — from DeFi protocols to financial institutions.
Real-Time Market Data
Best-in-class market data, taken from the source: VWAP from executed trades, consolidated bid/ask from top-of-book updates, state prices read directly from pool contracts. Aggregated in real time across 70+ exchanges and 9,000+ pairs, plus 35 tokenized stocks, gold and silver priced 24/7, outliers filtered, delivered over WebSocket at sub-250 ms latency. Built for the highest standards of decentralized oracle networks, developers, and financial institutions.
Consensus Proven
Blocksize operates the infrastructure behind the data: publishers, nodes and RPC endpoints across the leading oracle networks. Every price we submit must hold against consensus before it is accepted on-chain — independent validation, continuously, across networks securing around 75% of all value secured by oracles.
One Price, Whole Market.
Crypto liquidity is scattered. There is no consolidated tape and no single official price. The same asset trades at different levels on every venue, and the gaps widen exactly when accuracy matters most. Even the deepest exchanges sit within market-wide fair value only 25% of the time. Blocksize aggregates into one price the whole market agrees on.
5,000,000
On-Chain Transactions
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9000+
Price Pairs Supported
75%
Of Value Secured by Oracles
70+
Exchanges Aggregated
a fast but wrong price is just a faster mistake
Getting Started with Blocksize Market Data
Everything you need before you integrate: what we cover across exchanges and asset classes, which data products are included at each tier, how the feed is delivered and documented, what it costs, and who relies on it.
We operate the infrastructure behind the data: publishers, nodes and RPC endpoints across eight leading oracle networks. Our prices have to hold against consensus on-chain, validated continuously by parties with no incentive to agree with us. Most market data vendors publish a number and ask you to trust it; ours is checked by independent operators every time it goes on-chain, across networks securing around 75% of all value secured by oracles.
Asset managers and funds use Blocksize for NAV calculation and defensible fair-value marks on portfolios that auditors and administrators have to sign off. Family offices and wealth managers use it for independent valuation in tax, reporting and LP statements, where a single-exchange price is hard to justify. Trading firms and brokers use it for best-execution benchmarking, fair-fill measurement and backtesting against clean aggregated history rather than one venue's view. Crypto-native businesses, exchanges, custodians, lending platforms and payment providers, use it for pricing, collateral valuation and risk. And oracle networks and DeFi protocols use Blocksize as a first-party data publisher, the same role we've held since 2018. Oracle networks that need tokenized stock prices use the RWA feeds.
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More than 70 centralized and decentralized exchanges, and over 9,000 crypto price pairs, aggregated and updated in real time. Coverage spans majors like BTC, ETH and SOL through to long-tail and low-liquidity pairs, where single-venue pricing breaks down most severely. RWA feeds add 35 tokenized stocks, gold and silver, priced 24/7 through the same API.
Real-Time VWAP, Real-Time Bid/Ask, 24-Hour VWAP and 30-Minute VWAP are included on every plan. AMM State Price and tick-level trade Events are available from Business upwards. Each is drawn from its own source: VWAP from executed trades, bid/ask from top-of-book updates, state prices read directly from pool contracts. The 24-hour and 30-minute VWAP windows are built for closing marks, end-of-day valuation and audit-ready reporting. RWA bid/ask feeds price 35 tokenized stocks, gold and silver around the clock. RWA perp feeds are coming soon.
Data is delivered over WebSocket at sub-250ms latency, with HTTP available on Enterprise plans. The API documentation covers authentication, subscription methods, message schemas and error handling, with a machine-readable spec at api-docs.json. AI agents can connect through our MCP server without writing integration code.
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Pricing is published: Developer at €49, Start-Up at €299 and Business at €799 per month, with Enterprise quoted individually. Tiers differ by active feed count, API keys, concurrent connections, licence type and support level. Data quality is identical across all of them. See all plans and limits →
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Yes. 14 days free, no card required. Create an API key in the data portal and you can be streaming live data within minutes. The trial gives you the real feed, not a sandbox or delayed sample, so you can benchmark it against whatever you're using today.
