> For the complete documentation index, see [llms.txt](https://intrinsic-1.gitbook.io/axiomv2-sdk/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://intrinsic-1.gitbook.io/axiomv2-sdk/sdk-and-repl-reference/axiom-sdk-reference.md).

# Axiom SDK Reference

- [QueryBuilderV2](https://intrinsic-1.gitbook.io/axiomv2-sdk/sdk-and-repl-reference/axiom-sdk-reference/querybuilderv2.md): Explanation of the different QueryBuilderV2 methods available in the Axiom SDK for building and submitting Queries.
- [Data Subqueries](https://intrinsic-1.gitbook.io/axiomv2-sdk/sdk-and-repl-reference/axiom-sdk-reference/data-subqueries.md)
- [Header Subquery](https://intrinsic-1.gitbook.io/axiomv2-sdk/sdk-and-repl-reference/axiom-sdk-reference/data-subqueries/header-subquery.md): Used to query information about a block's header data
- [Account Subquery](https://intrinsic-1.gitbook.io/axiomv2-sdk/sdk-and-repl-reference/axiom-sdk-reference/data-subqueries/account-subquery.md): For querying data about an Account
- [Storage Subquery](https://intrinsic-1.gitbook.io/axiomv2-sdk/sdk-and-repl-reference/axiom-sdk-reference/data-subqueries/storage-subquery.md): Query a storage slot in the past
- [Transaction Subquery](https://intrinsic-1.gitbook.io/axiomv2-sdk/sdk-and-repl-reference/axiom-sdk-reference/data-subqueries/transaction-subquery.md): Query data about a Transaction
- [Receipt Subquery](https://intrinsic-1.gitbook.io/axiomv2-sdk/sdk-and-repl-reference/axiom-sdk-reference/data-subqueries/receipt-subquery.md): Get data fields from a Receipt and its Logs/Events
- [Solidity Nested Mapping Subquery](https://intrinsic-1.gitbook.io/axiomv2-sdk/sdk-and-repl-reference/axiom-sdk-reference/data-subqueries/solidity-nested-mapping-subquery.md): Query a nested mapping