# Subjects ## Operations - [Retrieve a list of subjects.](https://docs.redpanda.com/api/doc/schema-registry/operation/operation-get_subjects.md) - [Check if a schema is already registered for the subject.](https://docs.redpanda.com/api/doc/schema-registry/operation/operation-post_subject.md) - [Delete all schemas for the subject.](https://docs.redpanda.com/api/doc/schema-registry/operation/operation-delete_subject.md) - [Retrieve a list of versions for a subject.](https://docs.redpanda.com/api/doc/schema-registry/operation/operation-get_subject_versions.md) - [Create a new schema for the subject.](https://docs.redpanda.com/api/doc/schema-registry/operation/operation-post_subject_versions.md) - [Retrieve a schema for the subject and version.](https://docs.redpanda.com/api/doc/schema-registry/operation/operation-get_subject_versions_version.md) - [Delete a schema for the subject and version.](https://docs.redpanda.com/api/doc/schema-registry/operation/operation-delete_subject_version.md) - [Retrieve the raw schema for the subject.](https://docs.redpanda.com/api/doc/schema-registry/operation/operation-get_subject_versions_version_schema.md) - [Retrieve a list of schema IDs that reference the subject and version.](https://docs.redpanda.com/api/doc/schema-registry/operation/operation-get_subject_versions_version_referenced_by.md) - [Retrieve a list of schema ids that reference the subject and version.](https://docs.redpanda.com/api/doc/schema-registry/operation/operation-get_subject_versions_version_referenced_by_deprecated.md) [Powered by Bump.sh](https://bump.sh)