Re: One Url
It's not recommended practice to return different responses for the same request. But here is the simplest approach (assumes you're using OpenAPI 3.x, not OpenAPI/Swagger 2.0)...
You can use the `oneOf` keyword for when your response is one of the following. Eg:
responses: '200': description: Multiple response types content: application/json: schema: oneOf: - $ref: '#/components/schemas/Dog' - $ref: '#/components/schemas/Cat' - $ref: '#/components/schemas/Hamster'
See full example: https://gist.github.com/ponelat/7ba6f1ec61a6b7e0054bf0b3a7f80f0b
Further documentation on responses: https://swagger.io/docs/specification/describing-responses/