Hi,
Refer the url also below code
https://www.cybrosys.com/blog/configure-postman-for-sending-api-requests
https://www.cybrosys.com/blog/implementation-of-common-api-methods-in-the-odoo-15

import json
from odoo import http
from odoo.http import request, Response

class TestApi(http.Controller):
    @http.route('/Test/RestApi/fetch_sale_order', type='http', method=['POST'], auth='public', csrf=False)
    def fetch_product(self, **kwargs):
        if request.httprequest.method == 'POST':
                    """ADD YOUR CODE""""

Run route in postman
http://localhost:8018/Test/RestApi/fetch_sale_order?SaleOrder=

Hope it helps you

Hi!

I think you can use the python library request.

This library has some function like post wich with you can set à dict that will be transform in JSON

requests.post("https://exemple.com/api", data={"id": my_id})