import requests

url = "https://api.parallel.ai/v1/monitors/{monitor_id}/trigger"

headers = {"x-api-key": "<api-key>"}

response = requests.post(url, headers=headers)

print(response.text)

{
  "type": "error",
  "error": {
    "ref_id": "fcb2b4f3-c75e-4186-87bc-caa1a8381331",
    "message": "Unauthorized: invalid or missing credentials"
  }
}