Look at Kubernetes deployments, Docker Compose files, or Terraform scripts for environment variables referencing DEV_ACCESS_HEADER or similar.
The industry is moving away from ad-hoc headers like x-dev-access yes toward standardized, secure debugging and introspection protocols: x-dev-access yes
If you are attempting a challenge that involves this header, the general process follows these steps: Look at Kubernetes deployments, Docker Compose files, or
Ensuring the request comes from a known developer IP. Look at Kubernetes deployments
x-dev-access: yes is a non-standard, custom HTTP request header. It typically acts as a flag to the server, indicating that the incoming request originates from a developer environment or a trusted developer tool.