> For the complete documentation index, see [llms.txt](https://docs.justaname.id/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.justaname.id/sdk-reference/justaname-core-sdk/classes.md).

# classes

- [ApiKeyRequiredException](https://docs.justaname.id/sdk-reference/justaname-core-sdk/classes/apikeyrequiredexception.md)
- [InvalidConfigurationException](https://docs.justaname.id/sdk-reference/justaname-core-sdk/classes/invalidconfigurationexception.md)
- [InvalidENSException](https://docs.justaname.id/sdk-reference/justaname-core-sdk/classes/invalidensexception.md)
- [InvalidSignInException](https://docs.justaname.id/sdk-reference/justaname-core-sdk/classes/invalidsigninexception.md)
- [JustaName](https://docs.justaname.id/sdk-reference/justaname-core-sdk/classes/justaname.md)
- [OffchainResolvers](https://docs.justaname.id/sdk-reference/justaname-core-sdk/classes/offchainresolvers.md)
- [SignIn](https://docs.justaname.id/sdk-reference/justaname-core-sdk/classes/signin.md)
- [SubnameChallenge](https://docs.justaname.id/sdk-reference/justaname-core-sdk/classes/subnamechallenge.md)
- [Subnames](https://docs.justaname.id/sdk-reference/justaname-core-sdk/classes/subnames.md)