Get started

Build and run your first Subsquid indexer in fifteen minutes or less.

Quickstart

Subsquid Docs

Overview

A bird's eye view of Subsquid architecture

Build a Squid

Extract, transform, and serve on-chain data with GraphQL

Run a Squid

Test your squid locally or run it with Docker

Deploy a Squid

Deploy your squid to the Aquarium (free of charge)

Query a Squid

A reference of GraphQL queries and filters exposed by squids

Dev Support

Get your questions answered and connect with other SquidDevs

Highlights

Index EVM data

Index EVM smart contracts on chains like Ethereum, Polygon, BSC.

Index Substrate data

Learn how to build a simple squid for a Substrate-based chain.

Promote to production

Switch between squid versions with zero downtime

WASM smart contracts

Index WASM contracts developed with Ink!

GraphQL subscriptions

Live query updates with GraphQL subscriptions

Frontier EVM data

Index data from Substrate EVM chains like Moonbeam and Astar.

Migration

What's new in FireSquid

Learn about the new features introduced by the FireSquid release

Migrate from TheGraph

Migrate your subgraph and improve sync times up to 10x.

Migrate to FireSquid

Migrate to FireSquid from an older versions of squid SDK

FAQ

What is a squid?

A squid is a project that extracts and transforms on-chain data in order to present it as a GraphQL API. Squids are developed using the Subsquid SDK, which provides extensive tooling to define data schemas, data transfomation rules, and the shape of the resulting API.

Why should I use Subsquid?

The latency of serving app data with a squid is much lower compared to direct node access via gRPC. This means significantly better UX for your application. The flexibility of the Subsquid SDK gives developers the full power to access and manipulate historical on-chain data and build complex and responsive dApps with familiar tools. Finally, by using the Aquarium cloud service, developers no longer have to care about indexing infrastructure maintenance costs and hassle.

How much does Subsquid cost?

The Subsquid SDK is open source, and access to public Archives maintained by Subsquid Labs is free of charge. Following our TGE and mainnet launch, the price of Archive queries will be determined by an open market. The basic plan for deploying squids to the Aquarium is free and always will be, with some premium features to be introduced in the future.

What is an Archive?

Archives ingest and store the full log of historical on-chain data in a normalized format. Designed to be data sources for squids, Archives serve on-chain data as an API that supports batching over multiple blocks.

What is Aquarium?

Aquarium is a cloud service for hosting squids. This service is managed by Subsquid Labs.  Subsquid's CLI provides a convenient way to deploy squids to the Aquarium and manage them once they are hosted.

More questions? Check out our extensive FAQ