# Reference

- [API Reference](https://signum-network.gitbook.io/signumjs/reference/api-reference.md)
- [Core Module](https://signum-network.gitbook.io/signumjs/reference/api-reference/core-module.md): This is the main module, and almost all you may need to interact with the Signum Node API
- [Util Module](https://signum-network.gitbook.io/signumjs/reference/api-reference/util-module.md): The utility package for SignumJS with loads of convenience methods. If you need to convert amounts, chain time, or deal with deeplinks then this is your wanted module.
- [Crypto Module](https://signum-network.gitbook.io/signumjs/reference/api-reference/crypto-module.md): This module contains all cryptographic functions needed for Signum.
- [Http Module](https://signum-network.gitbook.io/signumjs/reference/api-reference/http-module.md): The Http Module is a thin wrapper around the isomorphic Http Implementation axios. It mainly unifies responses such that its use is consistent.
- [Contracts Module](https://signum-network.gitbook.io/signumjs/reference/api-reference/contracts-module.md): The Contracts module provides functions and messages to interact with Signum Smart Contracts, i.e. generate method calls and inspect contract data.
- [Monitor Module](https://signum-network.gitbook.io/signumjs/reference/api-reference/monitor-module.md): The Monitor Module is useful to poll for changes, e.g. on the blockchain, especially for confirmations of transactions.


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