api.py

from flask import Flask, Response, json, jsonify, request


api = Flask(__name__)

@api.route("/", methods=["POST"])
def query() -> Response:
  data = json.loads(request.data)
  response_data = {"dummy": "response"}
  response_data.update(data)
  return jsonify(response_data)

api.run(host="localhost", port=3000)