asyncapi.yml

asyncapi: 2.5.0
info:
  title: Example
  version: 0.1.0
channels:
  user/signedup:
    subscribe:
      message:
        description: An event describing that a user just signed up.
        payload:
          type: object
          additionalProperties: false
          properties:
            fullName:
              type: string
            email:
              type: string
              format: email
            age:
              type: integer
              minimum: 18