BLOCKSIZE
Blocksize Capital GmbH is a Frankfurt-based DeFi infrastructure provider founded in 2018 that aggregates real-time crypto market data from 70+ exchanges and publishes into 8 leading oracle networks, serving developers, institutions, AI agents, and blockchain foundations via subscription APIs, validator operations, and institutional staking.
- Company typePrivate
- Founded2018
- HeadquartersFrankfurt, Germany
- Headcount11–50
- GTM typeB2B
- OfferingSoftware
What BLOCKSIZE does
Blocksize Capital GmbH is a Frankfurt, Germany-based DeFi infrastructure provider founded in 2018 that operates across the full oracle value chain. Its core technology aggregates real-time crypto market data from 70+ centralized and decentralized exchanges with sub-250ms latency, supports 9,000+ price pairs, and applies dynamic outlier detection and source management. The same verified feed is published into 8 leading oracle networks (Chainlink, Pyth, Redstone, Supra, Band Protocol, API3, Tellor, Seda) — each with 99.99% uptime — and supports validator operations on Solana, Polygon, and EigenLayer, with the company claiming to secure ~70% of the oracle ecosystem and $38Bn+ of total value across 5M+ on-chain transactions.
The product portfolio spans tiered subscription APIs ($49/$299/$799-month plus custom Enterprise), institutional non-custodial staking and EigenLayer restaking with slashing insurance, whitelabel data licensing, and a 24/7 enterprise support subscription. In 2024–25 the company launched the Agentic Data MCP, an AI-agent-native market data gateway with x402 USDC settlement on Solana and Base, plus a suite of AI workflow products (market briefs, pre-trade checks, audit-grade receipts, macro snapshots, token quality, state divergence, trader alpha packs). Distribution combines self-serve API onboarding (14-day free trial), enterprise direct sales, oracle/blockchain network partnerships, and listings on MCP registries and the EigenLayer app.
The company has disclosed roughly $6.87M in total funding across three rounds (2018, 2019, and a 2021 Series A of ~$5.07M) and an undated 2019 acquisition of DECUS Network GmbH; no further financing is publicly disclosed. Blocksize Capital GmbH is co-founded by Christian Labetzsch and Christoph Impekoven, with a leadership team that also includes a CIO and CSO, and operates from Taunusanlage 8 in Frankfurt under German commercial registration (HRB 113470), positioning itself as a banking-compliant institutional counterparty in the digital-asset infrastructure market.
BLOCKSIZE firmographics
Firmographics- Name
- BLOCKSIZE
- Legal name
- Blocksize Capital GmbH
- Website
- https://blocksize.info
- Company type
- Private
- Founded year
- 2018
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- Blocksize Capital GmbH is a Frankfurt-based DeFi infrastructure provider founded in 2018 that aggregates real-time crypto market data from 70+ exchanges and publishes into 8 leading oracle networks, serving developers, institutions, AI agents, and blockchain foundations via subscription APIs, validator operations, and institutional staking.
- Ownership category
- akta.pro rank
BLOCKSIZE industry classification
Industry- Product category
- Digital Asset Market Data & Oracle Infrastructure
- NAICS
- Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services (518), Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services (518210)
- SIC
- Services-Computer Programming, Data Processing, Etc. (7370), Services-Computer Processing & Data Preparation (7374)
- akta.pro primary industry
- Oracle Networks & Off-Chain Data (price feeds, randomness, attestation) (FSAPABAE)
- akta.pro secondary industries
- Oracle Node Operators & Data Provider Networks (FSADAKAH), Oracles, Data Feeds & Attestations (price feeds, randomness, proofs) (FSAPAAAI), Blockchain Data & Indexing Infrastructure for Finance (Nodes, Indexers, Oracles) (FSAGAMAL), Staking Infrastructure & Validator Enablement (Middleware, Slashing Protection, MEV Relays) (FSADAHAJ)
Keywords
Where BLOCKSIZE is headquartered
LocationHeadquarters
- HQ city
- Frankfurt
- HQ country
- Germany
- HQ region
- Europe
Offices1 record
Markets served
BLOCKSIZE business model
Business model- GTM type
- B2B
- Offering type
- Software
- Cost components
- Technology or R&D, Infrastructure, Personnel, Operations, Marketing or Sales
Revenue model
- Crypto Data Subscription (Developer, Startup, Business, Enterprise tiers): Subscription-based access to real-time VWAP, bid/ask, 30min VWAP, 24h VWAP, AMM state prices, and equity/FX/metals data through WebSocket API and REST endpoints. Pricing ranges from €49/month (Developer) to custom Enterprise agreements. Includes tiered SLA commitments (99% to 99.95%) and support levels.
- Agentic Data MCP (AI Agent Market Intelligence): Usage-based pricing for AI agents accessing live market data through MCP discovery and x402-protected HTTP APIs. Unit pricing from $0.002-$0.008 per call depending on asset class, with bulk credit tiers (1,000 credits at 10% discount up to 100,000 credits at 40% discount). Starter allowance of 50 live data credits for eligible users.
- Oracle Node Operations: Validator and publisher operations across leading oracle networks and blockchain protocols (Solana, Polygon, EigenLayer). Revenue generated through staking rewards, validator fees, transaction fees, and publisher rewards from supported protocols.
- Institutional Staking Services: Non-custodial staking solutions with individual staking fees, slashing insurance, and SLAs available for institutions. Banking-compliant outsourcing options for ETH restaking via EigenLayer.
- Enterprise Data Licensing: Whitelabel license for Enterprise tier enabling full redistribution, reselling, and sub-licensing without Blocksize branding. Commercial license for Business tier allowing public display with mandatory attribution. Oracle node operators receive special redistribution rights.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Subscription | Monthly | Developer tier for simple apps, scripts, or dashboards needing reliable crypto prices |
| Subscription | Monthly | Startup tier for teams building products requiring scalable pricing across multiple assets |
| Subscription | Monthly | Business tier for best execution, benchmarking, surveillance, and risk management operations |
| Subscription | Annual | Enterprise tier for institutions, oracles, and mission-critical pricing infrastructure |
| Usage-based | Pay-as-you-go | AI Agent MCP market data access with per-call unit pricing |
| Subscription | Monthly | 24/7 Support subscription for mission-critical deployments |
Go-to-market motion1 record
Distribution channels6 records
Marketing channels8 records
BLOCKSIZE product offering
Product offeringCore offering
Blocksize aggregates real-time crypto market data from 70+ centralized and decentralized exchanges and delivers it as oracle-grade feeds to leading oracle networks, developers, and financial institutions via WebSocket and HTTP APIs. It also operates AI agent-native market data via an MCP server with x402 USDC settlement, runs publisher and validator infrastructure across major oracle networks and blockchain protocols, and offers non-custodial delegated staking services.
Product overview
Blocksize is a German-based DeFi infrastructure provider operating across the oracle value chain. The product portfolio consists of: (1) Crypto Market Data APIs for real-time VWAP, 24h/30min VWAP windows, bid/ask snapshots, AMM state prices, FX, and metals data delivered via WebSocket and HTTP JSON-RPC; (2) Blocksize Agentic Market Intelligence (MCP) - an AI agent-native market data gateway with x402 USDC settlement enabling autonomous AI agents to access market data through Model Context Protocol discovery and paid HTTP APIs; (3) Agent Workflow Products including market briefs, pre-trade checks, audit receipts, macro snapshots, and trader indicators (token quality, state divergence, Solana token briefs, alpha packs); (4) Oracle Publisher and Validator Node Operations across Chainlink, Pyth, Redstone, Supra, Solana, Polygon, and EigenLayer; (5) Delegated Staking Services with institutional-grade non-custodial solutions. The company aggregates pricing across 70+ exchanges with sub-250ms latency, securing $38 billion across the oracle ecosystem.
Differentiator
Problem solved
Functional benefit
Products and services
- Blocksize Agentic Market Intelligence (MCP) Institutional-grade real-time market data gateway for autonomous AI agents, enabling live crypto VWAP, bid/ask, AMM state prices, VWAP windows, market briefs, pre-trade checks, audit receipts, macro snapshots, and trader-ready indicator packages via MCP discovery and x402-protected HTTP APIs.
- Real-Time VWAP API Volume-weighted average price of digital assets aggregated in real time at sub-second timescale from qualified centralized and decentralized exchanges, delivered through WebSocket and HTTP JSON-RPC endpoints with authentication via API key.
- 24-Hour VWAP API Volume-weighted average prices calculated once at 00:00:00 UTC and delivered every 60 seconds through WebSocket API as a true 24-hour fixed VWAP from a websocket-backed cache.
- 30-Minute VWAP Close API Crypto asset closing prices aggregated from qualified centralized and decentralized exchanges every full 30 minutes, delivered through RPC API with optional closing-price-trade evidence.
- Real-Time Bid/Ask API Aggregated real-time bid and ask prices for crypto, equities, FX, and metals instruments delivered through streaming WebSocket subscriptions and snapshot endpoints.
- AMM State Price API Pool-derived state prices for covered crypto and protocol pairs with cache-backed reads and state pool fallback for covered protocol symbols.
- FX Rates API Spot snapshots for enabled foreign exchange pairs including EURUSD, GBPUSD and other major currency pairs.
- Metals Price API Spot pricing for gold, silver, platinum, palladium, and copper (e.g., XAUUSD, XAGUSD) delivered through the shared bid/ask route.
- Equities Bid/Ask API Bid/ask snapshots for supported equity tickers including AAPL and other major stocks, discoverable via an asset_class=equity parameter.
- Agent Workflow Products (Market Brief, Pre-Trade Check, Audit Receipt, Macro Snapshot, Trader Indicators) Suite of AI agent workflow products including Agent Market Brief, Pre-Trade Sanity Check, Audit-Grade Price Receipt, Multi-Asset Macro Snapshot, Token Quality Indicator, State Divergence Indicator, Solana Token Brief, and Trader Alpha Signal Pack, priced in credits from 5 to 25 credits per call.
- Crypto Market Data API Best-in-class crypto market data aggregated in real time across all major exchanges, built to the highest standards of decentralized oracle networks, developers, and financial institutions, supporting 9,000+ price pairs.
- Oracle Publisher Services Publisher infrastructure operating in leading oracle networks including Chainlink, Pyth, Redstone, Supra, Band, API3, Tellor, and Seda, with 99.99% uptime and consensus-proven pricing accuracy.
- Validator Node Operations Validator infrastructure for Solana, Polygon, and EigenLayer with publicly tracked uptime; secures $38 billion in total value and processes 5 million on-chain transactions.
- Delegated Staking Non-custodial delegated staking solutions for institutional clients with individual staking fees, slashing insurance, and SLAs, operated from Germany with 99% EigenLayer uptime and 0% slashing events.
- 24/7 Support Tiered incident response subscription with severity-based SLAs: Critical (30-minute response, 4-hour resolution), High (2-hour response, 8-hour resolution), Medium (24-hour response), and Low (48-hour response), including a dedicated telephone line for Severity 1-2 enterprise issues.
Quantifiable outcome
- $38Bn+ Total Value Secured across oracle ecosystem
- +5 more outcomes
Companies that use BLOCKSIZE
Customer profileNamed customers10 records
Segments6 records
Ideal customer profiles4 records
BLOCKSIZE technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- Yes
- API docs
- API detail
Core technology
AI maturity
App detail
Integration10 records
AI capability2 records
Feature6 records
BLOCKSIZE partnerships and signals
Strategic signalPartnerships
Eleven partnerships are on record, tiered core.
- ChainlinkcoreBlocksize operates as a Tier 1 data publisher in the Chainlink network with 99.99% uptime. Provides real-time VWAP and market data that secures DeFi applications through Chainlink's oracle infrastructure. The verified feed is consensus-proven on-chain.
- PythcoreBlocksize publishes institutional-grade market data into the Pyth oracle network with 99.99% uptime. Contributes to Pyth's high-frequency, low-latency price feeds for DeFi and traditional finance applications.
- RedstonecoreBlocksize provides compliant delegated (non-custodial) staking for Redstone in Germany, designed for institutional standards. Operates as publisher in Redstone oracle network delivering real-time verified market data.
- SupracoreBlocksize operates as publisher in the Supra oracle network with 99.99% uptime. Contributes to Supra's multi-chain oracle services with verified market data for DeFi applications.
- Band ProtocolcoreBlocksize provides market data publishing services to Band Protocol, a cross-chain data oracle platform, enabling verified price feeds for decentralized applications.
- API3coreBlocksize delivers market data to API3's first-party oracle network, contributing to their decentralized API infrastructure for Web3 applications.
- TellorcoreBlocksize operates as publisher in the Tellor oracle network, providing decentralized price data for blockchain applications requiring censorship-resistant data feeds.
- SedacoreBlocksize operates as publisher in the Seda oracle network, contributing to their modular data oracle protocol for cross-chain applications.
- SolanacoreBlocksize operates as validator on the Solana blockchain, contributing to network security and consensus through validator infrastructure with high uptime requirements.
- PolygoncoreBlocksize operates as validator on the Polygon network, securing the Ethereum scaling solution through validator node infrastructure with reliable performance.
- EigenLayercoreBlocksize participates in the EigenLayer ecosystem as validator enabling restaking for AVSs including EigenDA. Offers institutional ETH restaking through compliant non-custodial solutions with 99% uptime and 0% slashing events. Currently managing 4 ETH under management.
Scale indicators12 records
Recent moves7 records
Expansion highlights6 records
BLOCKSIZE competitors and assessment
Company assessmentDirect peers
- Amberdata: Amberdata provides crypto market data, analytics, and blockchain intelligence for institutions. Offers aggregated pricing, on-chain data, and DeFi analytics comparable to Blocksize's institutional data offerings.
- API3: API3 is a first-party oracle network and Blocksize customer. API3's Airnode technology enables APIs to serve as first-party oracles, representing both a partner relationship and a potential alternative data infrastructure model.
- Kaiko: Kaiko is a leading institutional crypto market data provider offering aggregated trade, order book, and VWAP data from 100+ exchanges. Directly comparable to Blocksize's institutional data subscription tiers and serves the same enterprise/financial institution segment.
- CoinGecko: CoinGecko provides crypto market data including pricing, volume, and liquidity metrics across hundreds of exchanges. While more retail-oriented, it competes in the aggregated crypto market data space and offers an API product comparable to Blocksize's Developer/Startup tiers.
- Redstone Finance: Redstone is a modular oracle network and Blocksize customer. It offers oracle data feeds and restaking services with institutional focus, directly comparable to Blocksize's oracle publishing and EigenLayer restaking offerings.
- Pyth Network: Pyth is a leading oracle network and Blocksize customer, publishing first-party data from trading firms. While Blocksize publishes into Pyth, Pyth's first-party publisher model positions it as both partner and potential competitor for institutional-grade market data.
- CryptoCompare: Digital Asset Research (formerly CryptoCompare) provides institutional crypto market data, indices, and analytics. Directly comparable to Blocksize's enterprise data subscriptions with similar focus on serving financial institutions and asset managers.
- Band Protocol: Band Protocol is a cross-chain data oracle platform and Blocksize customer. While Blocksize publishes into Band, Band's own data aggregation infrastructure represents an overlapping capability in the oracle data space.
Broad incumbents
- Chainlink: Chainlink is the dominant oracle network and also a Blocksize customer (publisher relationship). It operates its own first-party data infrastructure and PRICE Feeds, making it both a channel partner and a potential competitor in the data aggregation space.
- CoinMarketCap: CoinMarketCap is one of the largest crypto market data aggregators, providing pricing, volume, and market cap data across thousands of assets. It competes in the aggregated crypto data space and offers institutional API products comparable to Blocksize's offerings.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks6 records
Key highlights7 records
Customer concentration
BLOCKSIZE social profiles
Digital presenceBLOCKSIZE financial estimates
Financial estimateRevenue estimate
Valuation estimate
BLOCKSIZE leadership team
Management profileNumber of profiles
Profiles4 records
BLOCKSIZE funding detail
Funding detailFunding overview
Funding rounds3 records
Investors1 record
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
BLOCKSIZE M&A and investment
M&A and investmentM&A1 record
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about BLOCKSIZE
What does BLOCKSIZE do?
Blocksize aggregates real-time crypto market data from 70+ centralized and decentralized exchanges and delivers it as oracle-grade feeds to leading oracle networks, developers, and financial institutions via WebSocket and HTTP APIs. It also operates AI agent-native market data via an MCP server with x402 USDC settlement, runs publisher and validator infrastructure across major oracle networks and blockchain protocols, and offers non-custodial delegated staking services.
Is BLOCKSIZE a public or private company?
BLOCKSIZE is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was BLOCKSIZE founded?
BLOCKSIZE was founded in 2018. It employs 11 to 50 people.
Where is BLOCKSIZE based?
BLOCKSIZE is headquartered in Frankfurt, Germany, in the Europe region.
How does BLOCKSIZE make money?
Five revenue lines are on record. Crypto Data Subscription (Developer, Startup, Business, Enterprise tiers) is the primary driver. The others are agentic Data MCP (AI Agent Market Intelligence), oracle Node Operations, institutional Staking Services and enterprise Data Licensing.
Who are BLOCKSIZE's main competitors?
Direct peers on record are Amberdata, API3, Kaiko, CoinGecko, Redstone Finance, Pyth Network, CryptoCompare and Band Protocol. Broad incumbents are Chainlink and CoinMarketCap.
Does BLOCKSIZE have an API?
Yes. Blocksize provides real-time crypto market data APIs including Real-Time VWAP, 24-Hour VWAP, 30-Minute VWAP, Real-Time Bid/Ask, AMM State Price, and Trade Events. Production endpoints: WebSocket at wss://data.blocksize.capital/marketdata/v1/ws and HTTP JSON-RPC at https://data.blocksize.capital/marketdata/v1/api. Authentication via X-Api-Key and Bearer token headers. For AI agents, a separate MCP (Model Context Protocol) server is available at https://mcp.blocksize.capital/mcp/server/ with x402 USDC settlement and wallet credits. Pricing: Core Crypto VWAP $0.002-0.004, Extended Crypto/BidAsk $0.004, FX/Metals $0.005, Equities $0.008. Bulk credit tiers available with up to 40% discount. Developer documentation is at matrix.blocksize.capital/api-docs.
What industry is BLOCKSIZE in?
BLOCKSIZE's product category is Digital Asset Market Data & Oracle Infrastructure. Its primary akta.pro industry code is FSAPABAE, Oracle Networks & Off-Chain Data (price feeds, randomness, attestation), with a secondary code of FSADAKAH, Oracle Node Operators & Data Provider Networks. Its NAICS code is 518 and its SIC code is 7370.