# Reference

- [Smart contracts](/reference/smart-contracts.md)
- [Audits](/reference/smart-contract-audit.md): Audits of the Swarm core smart contracts
- [APIs](/reference/apis.md)
- [Onboarding API](/reference/apis/onboarding-api.md): A solution for institutions who do not have a know-your-customer (KYC) and anti money laundering (AML) provider to offer regulatory-compliant tokenized securities and trading to their users.
- [Subgraph](/reference/apis/subgraph.md)
- [KYC Select](/reference/kyc-select.md): Built-in optional regulatory compliance into open trading infrastructure