# version

> Tag 12: a client asks which revision of this specification a server implements; the server sends exactly one response carrying the string 2.3.0, and the scope finishes.

Canonical: https://provider.diverge.network/2.3.0/endpoints/version/
Specification revision: 2.3.0

A client opens the scope with a request whose payload is the tag byte
`12` and nothing more. The server sends exactly one response, whose
payload is the string `2.3.0`, the revision of this specification. The
response finish follows the response, and no frame follows the
finish.

- **The request.** The request carries no parameter; the tag is the
  whole of it. [Request](/2.3.0/endpoints/version/request/) states its
  form.
- **The response.** The response carries the string `2.3.0`, and a
  server that implements this revision sends no other string.
  [Response](/2.3.0/endpoints/version/response/) states its form.
- **No error.** This endpoint defines no error frame. The scope
  carries exactly one response and the response finish.
- **Independence.** The request and its response depend on no other
  exchange. A client that does not know which revision a server
  implements learns it from this exchange before it composes any
  other request.