name: FSPIOP-HTTP-Method
in: header
schema:
  type: string
required: false
description: >-
  The `FSPIOP-HTTP-Method` header field is a non-HTTP standard field used by the
  API for signature verification, should contain the service HTTP method.
  Required if signature verification is used, for more information, see [the API
  Signature
  document](https://github.com/mojaloop/docs/tree/main/Specification%20Document%20Set).