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Error in key generation for draw Poly line in google map

{
"error_message": "Keyless access to Google Maps Platform is deprecated. Please use an API key with all your API calls to avoid service interruption. For further details please refer to http://g.co/dev/maps-no-account",
"routes": [],
"status": "OVER_QUERY_LIMIT"
}
Not able to draw poly line in google map because of this error message and OVER_QUERY_LIMIT status.

Please Follow the step To Avoid getting error
Enable the Following Apis
1 Google map Sdk for android
2 Direction Api
3 Geocoding APi
4 GeoLocation Api
5 Places Api
6 Places Sdk For Android
And Please Create a billing Account It will not take any charges only take 2 INR to check if your not a robot
And please Pass Your Api Key to the URL
(NOTE DONT MAKE YOUR API RESTRICTED)
String url = "https://maps.googleapis.com/maps/api/directions/"+output+"?"+parameters + "&key=" + MY_API_KEY
After Completing this Step It will Work..

Api key request denied

I am trying do that drawing path between two location,when I try do this I got a error this.
I shared below my url and error.I created Android api key,wht I got request denied error from google api
url: https://maps.googleapis.com/maps/api/directions/json?origin=41.050399,28.940599&destination=41.1119857,29.0186137&sensor=false&mode=driving&alternatives=true&key=AIzaSyB9LW3JNai1tGYtSVZrRGMGeJ71q7Y3DbA
json:{
"error_message" : "This IP, site or mobile application is not authorized to use this API key. Request received from IP address 78.186.62.169, with empty referer",
"routes" : [],
"status" : "REQUEST_DENIED"
}

I dont think that is the correct way of using it, try something like this
https://maps.googleapis.com/maps/api/js?key=<YOUR_API_KEY>&callback=initMap
and if it is in a variable then u will need " " like
src="https://maps.googleapis.com/maps/api/js?key=<YOUR_API_KEY>&callback=initMap"

Directions API web service requires a Server API key, not Android API key.
Please look at the documentation:
https://developers.google.com/maps/documentation/directions/get-api-key#get-an-api-key

unable to get the routes from the google api

I got the api key by following the usual steps.
Then I was able to get map and use some inbuilt things on it like search etc
Then later I tried routing, I was unable to get the routes. When I pasted the request:
https://maps.googleapis.com/maps/api/directions/json?origin=28.6100,2077.2300&destination=18.9750,72.8258&key=mykey
on the browser I got the following and realized that I don't have the permission. I searched for this problem but couldn't find the solution, please help.
Response on browser:
{
"error_message" : "This IP, site or mobile application is not authorized to use this API key. Request received from IP address xxxxxxxx, with empty referer",
"routes" : [],
"status" : "REQUEST_DENIED"
}

Make sure you are using server API key, not an Android key (mobile development). See this post:
Google Places API request denied for Android autocomplete, even with the right api key .
Also make sure you are sending the key to GooglePlaces instance.
If you are restricting use of API key by IP make sure your request is coming from an allowed address.

Google Map API For Near By Place By Latitude and Longitude

I have an Api key, Api console and Sh1, and using EclipseIDE ANDROID -> preference, I
added all data in Api as below:
https://maps.googleapis.com/maps/api/place/radarsearch/json?location=48.859294,2.347589&radius=5000&types=food|cafe&sensor=false&keyword=vegetarian&key=AIzaSyCRQ2aFtbU2sOgO6fMvuM2edHPaWRDxbRg
But I get this error message:
{
"error_message" : "This IP, site or mobile application is not authorized to use this API key.",
"html_attributions" : [],
"results" : [],
"status" : "REQUEST_DENIED"
}
What am I doing wrong?

I request you to Use following API
https://maps.googleapis.com/maps/api/place/nearbysearch/json?location=48.859294,2.347589&radius=500&types=school&sensor=false&key=AIzaSyDN1QX-gWUR-mIYo_D21PNFLHHpNQkIkGU

So I had the same issue you were experiencing, I used the same api as you however what I found was that if you generate a new API key for android it does not work, but if you generate a new Server key and use that it works perfectly. I found some assistance on the following post REQUEST_DENIED with Google Places API browser key or app key?

Google places autocomplete api - REQUEST_DENIED

I'm creating app that use autocomplete places google api.
And I don't know what is wrong but all the time I got responses like:
{
"predictions" : [],
"status" : "REQUEST_DENIED"
}
I send req : https://maps.googleapis.com/maps/api/place/autocomplete/json?input=Paris&types=geocode&language=fr&sensor=true&key=mykey
Documentation says :
REQUEST_DENIED indicates that your request was denied, generally because of lack of a sensor parameter.
I have sensor parameter, maybe it is something with api key.
Is there any page where can I get google's log :), to see why I got REQUEST_DENIED?
I use api key from :
http://code.google.com/intl/pl-PL/android/maps-api-signup.html
Maybe I have to get an api key from somewhere else.

You should be able to view your API Key by going to the API Console first:
https://code.google.com/apis/console
If you haven't yet, you will need to create a new "Project" and then enable the Predictions services first by using the On/Off switch.
Please post your results, I have a similar problem with getting the REQUEST_DENIED response, but I've already got the API key and I'm using the sensor parameter like their documentation states.
It is frustrating that Google doesn't give any sort of response code along with REQUEST_DENIED so you can see why it's denying it. This will be difficult to support and troubleshoot in a production environment if this randomly goes out without providing any details as to why.
Update:
I just found this works for me now, but only after changing my requests to GET requests instead of POST. For reasons unknown, Google returns REQUEST_DENIED for POST requests but allows the same request via GET. A quick test for you to see if this is your problem would be to put the URL together with your API key and other parameters and try it through your browser instead. If that works then just rewrite your Android code to use GET instead of POST and you should be all set.

It was solved for me when I exchanged the API key. I was using the one under Android device, I changed it to the one "Key for browser apps (with referers)" and it worked for me although I'm using Android Device.

I recommend using .getJson() to get an error message along with your response to know what is exactly wrong.
For my case in flutter: I used googlePlace!.autocomplete.getJson(value);
and i got the following response.
{ "error_message" : "You must enable Billing on the Google Cloud Project at https://console.cloud.google.com/project/_/billing/enable Learn more at https://developers.google.com/maps/gmp-get-started", "predictions" : [], "status" : "REQUEST_DENIED" }

That's the wrong API key. Follow the steps here to get the right one.

Make sure you API keys are generated correctly and that you have enabled the necessary APIS.
In my case, when designing iOS application - I need to enable Google Maps SDK for iOS, Google Places API for iOS
And most importantly, and without being mentioned by Google (in any other place as well) enable Google Places API Web Service.
With this, I ended a 2 day search for my pesky problem.
And, of course, make sure you use Key for server applications