openapi: 3.0.4
info:
  title: OpenAPI 3.0.4 servers example
  version: 1
servers:
  - url: https://foo.com/v1
    description: foo
  - url: /v1
paths:
  /foo:
    get:
      responses:
        '200':
          content:
            '*/*':
              schema:
                type: string
          description: OK