# Contract API Reference

- [TokenCapacitor](/docs/contract-api-reference/tokencapacitor.md): A token, like time, is a flat circle.
- [Calls](/docs/contract-api-reference/tokencapacitor/calls.md): YOUR CALL IS FREE!
- [Transactions](/docs/contract-api-reference/tokencapacitor/transactions.md): moo la la la la la
- [Gatekeeper](/docs/contract-api-reference/gatekeeper.md): Regulator, mount up!
- [Calls](/docs/contract-api-reference/gatekeeper/calls.md): free
- [Transactions](/docs/contract-api-reference/gatekeeper/transactions.md): state-changing