diff --git a/Express/barAndCafe/src/openTripMaps.ts b/Express/barAndCafe/src/openTripMaps.ts
index 1f7e208..7d4ca1b 100644
--- a/Express/barAndCafe/src/openTripMaps.ts
+++ b/Express/barAndCafe/src/openTripMaps.ts
@@ -3,9 +3,15 @@ import express from "express"
 import * as dotenv from "dotenv";
 
 dotenv.config({path: '../../.env'})
-
 const key = process.env.OPEN_TRIP_MAPS_KEY
 
+/**
+ * make GET request to the OTM for radius search.
+ * @param {string} lon Longitude of radius center point
+ * @param {string} lat Latitude du point central du rayon
+ * @param {string} radius search radius size in meters
+ * @returns {FeatureCollection} a list of POIs with their type, id, etc. (cf: [opentripmap](https://dev.opentripmap.org/docs#))
+ */
 async function callRadius(lon: string, lat: string, radius = '1000') {
     const optionsDrink = {
         method: 'GET',
@@ -28,7 +34,11 @@ async function callRadius(lon: string, lat: string, radius = '1000') {
     }
 }
 
-
+/**
+ * make GET request to the OTM for city info.
+ * @param {string} name Name of a city
+ * @returns {Geoname} info of a search city their name, country, lat, lon, etc. (cf: [opentripmap](https://dev.opentripmap.org/docs#))
+ */
 async function callCity(name:string) {
     const optionsCity = {
         method: 'GET',
@@ -70,7 +80,7 @@ export async function getCity(req: express.Request, res: express.Response) {
 }
 
 /**
- * Handle GET request for city search route ('/otm/radius').
+ * Handle GET request for radius search route ('/otm/radius').
  * @param {express.Request} req - HTTP Request object.
  * @param {express.Response} res - HTTP Response object.
  */