postal.js add-on that provides a request/response pattern API.

Postal is a code generator that generates strongly typed message contracts for request-response type protocols. Messages are serialized and deserialized using Protocol buffers.

Fetch Brazilian postal code (CEP) data from multiple APIs concurrently. It races the requests and returns the fastest valid response, discarding the slower one.

taking postal code input from user and populating the field of state and city through geoapify API . this is an example of using api in web handling get request and understanding response

The Module used is used for provides worldwide postal code information through our fast and free REST-API. This API has predictable resource-oriented URLs, accepts form-encoded request bodies, returns JSON-encoded responses, and uses standard HTTP response codes, authentication, and verbs.

Flask-based Pincode Verification API that checks Indian pincodes from MySQL cache first, fetches missing data from the Postal Pincode API, stores city/state results, and returns fast JSON responses for verification requests.

Python 3 script with capability to track the current location of your parcels. That script uses ELTA website, the Greek postal service and the responses is on Greek. But is a good template for new projects with http requests, json responses and csv reading functions.