# Enrollment REST API {% hint style="warning" %} SCEPman Enterprise Edition only {% endhint %} SCEPman features a REST API to enroll certificates using the *Enrollment over Secure Transport* (EST) protocol. This is an alternative to the SCEP endpoints that require the SCEP-style of authentication, while the REST API uses Microsoft Identities for authentication. The protocol is also much simpler than SCEP. The REST API features two different authentication models. ### Self Service Enrollment As a user, you can interactively authenticate if you have the CSR.SelfService role. This allows you to request certificates for yourself and your devices. See [Self Service Enrollment](/certificate-management/api-certificates/self-service-enrollment.md) for more details. ### API Enrollment You can also authenticate as a service principal that has the CSR.Request.Db role. This allows you to automate certificate enrollment to servers, IoT devices, or in other use cases. See [API Enrollment](/certificate-management/api-certificates/api-enrollment.md) for details. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.scepman.com/certificate-management/api-certificates.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.