# OnceForAll Developer Portal > Public API documentation portal (ofa-developers) ## APIs - [Nalanda API](https://developers.onceforall.com/nalanda-api/): 1.0 - OpenAPI: https://developers.onceforall.com/nalanda-api/openapi/Authentication.yaml - OpenAPI: https://developers.onceforall.com/nalanda-api/openapi/Clockings.yaml - OpenAPI: https://developers.onceforall.com/nalanda-api/openapi/Contractors.yaml - OpenAPI: https://developers.onceforall.com/nalanda-api/openapi/Projects.yaml - OpenAPI: https://developers.onceforall.com/nalanda-api/openapi/Companies.yaml - OpenAPI: https://developers.onceforall.com/nalanda-api/openapi/ContractorsWorkers.yaml - OpenAPI: https://developers.onceforall.com/nalanda-api/openapi/Homologations.yaml - OpenAPI: https://developers.onceforall.com/nalanda-api/openapi/Workers.yaml - Reference: https://developers.onceforall.com/nalanda-api/reference/ - Docs: https://developers.onceforall.com/nalanda-api/docs/Quickstart/ - Docs: https://developers.onceforall.com/nalanda-api/docs/terms-of-use-api/ - Docs: https://developers.onceforall.com/nalanda-api/docs/Invitations/ - Changelog: https://developers.onceforall.com/nalanda-api/changelog/ - [Nalanda SOAP WebServices](https://developers.onceforall.com/nalanda-soap-webservices/): API - Docs: https://developers.onceforall.com/nalanda-soap-webservices/docs/Clocking-action/ - Docs: https://developers.onceforall.com/nalanda-soap-webservices/docs/Export-Project-Data/ - Docs: https://developers.onceforall.com/nalanda-soap-webservices/docs/Gestiona-WebService/ - Docs: https://developers.onceforall.com/nalanda-soap-webservices/docs/Global-state-workers-companies/ - Docs: https://developers.onceforall.com/nalanda-soap-webservices/docs/Login-Action/ - Docs: https://developers.onceforall.com/nalanda-soap-webservices/docs/Machinery-service/ - Docs: https://developers.onceforall.com/nalanda-soap-webservices/docs/Project-by-clockings/ - Docs: https://developers.onceforall.com/nalanda-soap-webservices/docs/Project-KPIs/ - Docs: https://developers.onceforall.com/nalanda-soap-webservices/docs/State-calculator/ - Docs: https://developers.onceforall.com/nalanda-soap-webservices/docs/Workers-documentation-state/