Blur API

Blur API is the developer-facing access layer for Blur, an NFT marketplace on Ethereum that launched in 2022. Built for professional traders and developers, Blur established itself in the Ethereum NFT ecosystem by offering marketplace aggregation, sweep tools, and bid-pool mechanics designed to maximize trading efficiency. The API layer extends these capabilities to programmatic consumers — making it possible to integrate Blur's marketplace data, order flows, and liquidity signals into custom trading systems, analytics platforms, and other NFT-oriented applications

Unlike consumer-focused NFT platforms, Blur's infrastructure is oriented toward high-frequency, data-driven NFT trading. The API reflects this positioning by exposing granular order and collection data suited to professional workflows. Access to the API appears to be request-based rather than openly published, meaning developers must apply through an official intake process before integration is possible

The core of Blur API centers on real-time access to the Blur marketplace's order book — including active listings, floor price data, bid pools, and collection-level metrics. Developers can query listing state across collections tracked by Blur, retrieve offer and bid information, and access price history that reflects actual trading activity on Ethereum. This makes Blur API relevant for teams building algorithmic NFT tools, pricing models, and portfolio monitoring systems

Blur introduced bid pools — a collective bidding mechanism where liquidity providers deposit ETH into collection-wide bids — as a core differentiator in the Ethereum NFT market. The API surfaces this bid pool data alongside standard order data, giving developers insight into both the ask side and bid side of the market. This dual-sided view is particularly useful for modeling NFT liquidity across ERC-721 and ERC-1155 collections on Ethereum mainnet

Blur API surfaces marketplace listings at the collection and individual token level. Developers can retrieve floor prices, rank-based pricing signals, and active ask data for tracked NFT collections. The listing data reflects Blur's aggregated order book, which includes native Blur listings as well as aggregated orders from compatible marketplace sources — making it one of the more comprehensive NFT data sources on Ethereum for professional tooling

Bid management is a central feature of the Blur trading experience, and the API exposes bid-side data accordingly. Developers can access collection-level bid data and track bid pool participation across tracked collections. This is relevant for risk modeling, counter-bidding strategies, and liquidity analysis where bid depth matters. Blur's bid mechanics differ from those of legacy NFT marketplaces and require specific integration understanding to apply correctly

Marketplace analytics available through Blur API include collection-level trading signals, relative ranking data, and historical sales information. These analytics support use cases in NFT research, market surveillance, and portfolio valuation. Because Blur focuses on professional trading activity, its analytics layer reflects metrics relevant to active market-making and sweep contexts rather than casual NFT browsing or discovery

The API covers ERC-721 and ERC-1155 token standards on Ethereum mainnet, aligning with the two dominant NFT standards in use across major collections. This scope means Blur API can be applied to most Ethereum-native NFT collections of significance. Developers should be aware that Blur's protocol is proprietary rather than open-source, which means behavioral changes to the marketplace may affect the API without advance public documentation

Blur API is applicable across several professional NFT use cases: algorithmic traders can monitor floor price movements and build sweep strategies based on live order book signals; portfolio managers can pull collection pricing data to estimate unrealized value against current market bids; analytics teams can track trading activity and identify volume trends across Ethereum NFT sectors; and custom trading dashboards can integrate live Blur data alongside other marketplace feeds to provide a unified view of Ethereum NFT liquidity. Each of these scenarios benefits from programmatic access to Blur's order and bid data in a structured, queryable form

Developer integration with Blur API begins with submitting a request through the official API access form — access is not self-serve or publicly documented through an open developer portal. Approved developers receive the credentials or documentation needed to begin integration. This request-based model means that integration timelines and available endpoint documentation depend on the approval process. Developers already building on Ethereum NFT infrastructure and familiar with standard REST API patterns will find the integration model conventional once access is granted

Blur has published audit documentation through the Blur Foundation, covering its marketplace smart contracts including the Blur core contracts and the Blur v2 upgrade. These audits are listed through the Foundation's documentation at docs.blur.foundation. As a proprietary protocol, Blur's security posture depends on the integrity of its private codebase and deployed smart contract implementations. Developers integrating Blur API should review available audit documentation and account for the API as a trusted third-party dependency when modeling risk in their applications

Blur API represents a structured entry point for developers and professional traders seeking programmatic access to Ethereum NFT marketplace data and order flows. Its request-based access model and proprietary licensing mean it operates differently from open developer ecosystems, but for teams with legitimate professional trading or analytics use cases, it offers a practical path to marketplace integration. Developers evaluating Blur API should assess the approval process timeline and available data scope against their specific requirements before committing to an integration roadmap