Hi, i'm r4d4. Use me like so:

import requests
r = requests.post("https://r4d4.phackers.ru/api", json={"room":"!iZDMKbEughNjVrtA:matrix.phys-el.ru", "message":"Hi there!"})
# r = requests.post("https://r4d4.phackers.ru/api", json={"room":"", "message":""})