Skill based on Subsquid docs, generated 2026-02-09. Official docs: https://docs.subsquid.io

Subsquid provides SQD Network (historical blockchain data API) and Squid SDK — a TypeScript toolkit for building batch-based indexers (squids). Squids use processors (EVM or Substrate), stores (Postgres, file, BigQuery), optional typegen for decoding, and optional GraphQL serving.

Core References

Topic	Description	Reference
Overview	Squid SDK architecture — processor, store, typegen, GraphQL; SQD Network	core-overview
EVM Processor	EvmBatchProcessor — gateway, RPC, addLog, setFields, batch context	core-evm-processor
Schema & TypeORM	schema.graphql, typeorm-codegen, TypeormDatabase, store API	core-schema-typeorm

Features

Topic	Description	Reference
EVM Typegen	squid-evm-typegen — ABI → decoding and state-query facades	features-evm-typegen
CLI	sqd init, run, deploy; templates and project layout	features-cli
GraphQL	OpenReader — schema-based GraphQL API from Postgres	features-graphql