Every time jina-ai/jina is updated or released, the schema of Jina command line interface is exposed to OpenAPI JSON schema. They can be used or referred in the 3rd-party applications. The schema is tagged with the Jina’s version.
OpenAPI schema contains the schema for all data structures, request and response model in Jina:
https://api.jina.ai/rest/latest gives you the latest stable OpenAPI schema in JSON.
https://api.jina.ai/rest/master gives you the latest development OpenAPI schema in JSON.