Access to reliable, historical blockchain data remains one of the most persistent challenges in Web3. As ecosystems expand across multiple chains and applications demand richer analytics, the need for scalable, developer-friendly data infrastructure becomes critical.

SQD addresses this challenge by providing a decentralized query engine and horizontally scalable data lake designed for blockchain data at scale.

Built to serve both production workloads and emerging decentralized use cases, SQD enables projects to work with on-chain data without compromising performance or flexibility.

Foundations Of Scalable Data Layer

SQD Network is a decentralized query engine designed to serve raw historical blockchain data across multiple networks.

Instead of abstracting information behind rigid schemas, SQD exposes low-level on-chain data through flexible, REST-style APIs. Developers gain precise control to query only the data required, without losing context or fidelity.

Supported Data and Chains

SQD supports major EVM and Substrate chains and provides access to:

• Event logs
• Full transaction data with receipts
• Execution traces
• Selected state diffs

The architecture is well suited for analytics, monitoring, and infrastructure-level tooling where precision and completeness are critical.

Network Environments

SQD operates across two environments to support different stages of adoption:

• Public Cluster: a production-ready environment running on SQD-managed infrastructure
• Decentralized Network (Testnet): a permissionless network currently in testing

Both environments expose the same developer-facing API, allowing teams to move between production and decentralized setups without modifying integrations.

Turning Raw Data into Usable Pipelines

While SQD Network focuses on data availability, Squid SDK provides the tooling layer that transforms raw blockchain data into structured, application-ready pipelines.

Squid SDK is a TypeScript-based toolkit designed for building custom indexers on top of SQD Network. It enables teams to define precise indexing logic while maintaining correctness and operational reliability.

The SDK includes:

1. High-level filtering and extraction libraries for selecting specific on-chain events, transactions, and state changes
2. Ergonomic decoding tools for working with raw blockchain data in a developer-friendly format
3. Built-in handling of chain reorganizations and unfinalized blocks, ensuring accurate results in real-time and near-real-time pipelines

These features make it possible to build low-latency data pipelines without sacrificing data integrity.

Squid SDK is commonly used to power:

• Custom APIs
• Analytics and monitoring dashboards
• Internal data platforms and indexing systems

The SDK is especially valuable for teams that require full control over indexing logic rather than relying on generalized third-party indexing services.

Indexing as a Service

For teams that want to deploy and manage indexers without maintaining infrastructure, SQD Cloud offers a platform-as-a-service layer on top of Squid SDK.

SQD Cloud handles provisioning of databases and compute resources, supports zero-downtime migrations between indexer versions, and provides high-performance RPC endpoints for real-time applications. Deployment and management can be done through a web interface or CLI, making it accessible to both small teams and larger organizations running production workloads.

How UNCX Uses SQD

At UNCX, accurate and verifiable on-chain data is essential for products like liquidity lockers, vesting contracts, and ecosystem analytics. SQD plays a key role in supporting this infrastructure.

UNCX leverages SQD Network and Squid SDK to index and query historical blockchain data across multiple networks, ensuring reliable visibility into contract activity and state changes. This enables transparent, verifiable access to on-chain events while maintaining the performance required for user-facing applications.

By building on SQD’s data layer, UNCX is able to scale its analytics and monitoring systems alongside the growing number of supported chains, without relying on centralized or opaque indexing solutions.

Enabling the Next Layer of Web3 Infrastructure

SQD operates as a foundational component of the Web3 stack, connecting raw blockchain data with production-grade applications.

By combining a scalable query engine, flexible indexing tooling, and managed deployment options, SQD enables developers and infrastructure providers to build data-driven products without rebuilding the data layer for each use case.

As Web3 applications mature, infrastructure such as SQD becomes increasingly important for making on-chain data accessible, reliable, and usable at scale across ecosystems.