# API Calls

- [Request Structure](/api-reference/api-introduction/instruction/request.md)
- [Authentication](/api-reference/api-introduction/instruction/authorization.md)
- [Signature Algorithm v2](/api-reference/api-introduction/instruction/authorization/sign.md)
- [Access Token](/api-reference/api-introduction/instruction/authorization/token.md)
- [Responses](/api-reference/api-introduction/instruction/response.md)
- [Parameter Types](/api-reference/api-introduction/instruction/datatype.md)
- [Common Error Codes](/api-reference/api-introduction/instruction/commonerrorcode.md)