OpenAPI or swagger.json auto discovery

Question

Is there any spec or convention on URL where one should place swagger.json (or whatever name it is agreed) so that public API of my site can be automatically di

Answer 1

How about serving the Swagger JSON in an HTTP response body, in response to an OPTIONS request for the URL / ?

This is specifically permitted by the relevant RFC.

Further, consider implementing HATEOAS, as strongly advocated by Roy Fielding.