x-request-id-parameter

Requires every operation to declare a header parameter named x-request-id, case-insensitively.

Attribute	Value
Category	Parameters
Maturity	Silver
Starter	Off
Lenient–Strict	Warning
Complete	Error

See it fail

paths:
  /payments:
    get:
      responses: { '200': { description: OK } }

Fix it

parameters:
  - in: header
    name: x-request-id
    schema: { type: string, format: uuid }

Add it to each operation; this implementation checks operation parameters.

Nearby: x-request-id-uuid-format.