Useful for debugging what headers are being sent by the client,
including auth tokens, proxy headers, and custom headers.

HTTP Method:

• GET

Responses:

• 200 OK: Returns a JSON object containing all request headers.

Extracts the client IP from request headers. Checks X-Forwarded-For first
(for proxied requests), then X-Real-IP as a fallback.

HTTP Method:

• GET

Responses:

• 200 OK: Returns a JSON object containing the client’s origin IP.

Responds with the allowed HTTP methods for this server in the Allow header.
The body of the response is empty.

HTTP Method:

• OPTIONS

Responses:

• 204 No Content: Returns an empty body with the Allow header set to
  “GET, POST, PUT, PATCH, DELETE, OPTIONS, HEAD”.

Echoes back the request’s method, headers, and the parsed JSON body.
Expects a JSON request body.

HTTP Method:

• PATCH

Request Body:

• Payload: A generic JSON object.

Responses:

• 200 OK: Returns a JSON object containing method, headers, and parsed body.
• 400 Bad Request: If the request body is not valid JSON.

Echoes back the request’s method, headers, and the parsed JSON body.
Expects a JSON request body.

HTTP Method:

• POST

Request Body:

• Payload: A generic JSON object.

Responses:

• 200 OK: Returns a JSON object containing method, headers, and parsed body.
• 400 Bad Request: If the request body is not valid JSON.