# Weather Forcast FlightXML3

**URL:** <https://discussions.flightaware.com/t/weather-forcast-flightxml3/29658>\
**Category:** AeroAPI\
**Created:** [December 29, 2017, 9:14pm UTC](https://discussions.flightaware.com/t/weather-forcast-flightxml3/29658 "2017-12-29T21:14:08Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![crexperts](https://sea1.discourse-cdn.com/flex019/user_avatar/discussions.flightaware.com/crexperts/32/6473_2.png) [@crexperts](https://discussions.flightaware.com/u/crexperts)\
**Post date:** [December 29, 2017, 9:14pm UTC](https://discussions.flightaware.com/t/weather-forcast-flightxml3/29658/1 "2017-12-29T21:14:08Z")

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Hi,

I’m getting this error while using weather forecast:

‘The HTTP request is unauthorized with client authentication scheme ‘Anonymous’. The authentication header received from the server was ‘Basic realm=“FlightXML3”’.’

plz help.

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**Author:** ![cbw](https://sea1.discourse-cdn.com/flex019/user_avatar/discussions.flightaware.com/cbw/32/117000_2.png) [@cbw](https://discussions.flightaware.com/u/cbw)\
**Post date:** [December 29, 2017, 9:59pm UTC](https://discussions.flightaware.com/t/weather-forcast-flightxml3/29658/2 "2017-12-29T21:59:12Z")

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This post may be able to help with the authentication. I believe that authentication is similar between FlightXML 2 and FlightXML 3

> [@The HTTP request is unauthorized with client authentication](https://discussions.flightaware.com/t/the-http-request-is-unauthorized-with-client-authentication/18372):
>
> I am getting below Error while accessing Flight Aware API "The HTTP request is unauthorized with client authentication scheme ‘Anonymous’. The authentication header received from the server was ‘Basic realm=“FlightXML2”’. While inner exception gives me message as below. “The remote server returned an error: (401) Unauthorized.”

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**Author:** ![iaina](https://sea1.discourse-cdn.com/flex019/user_avatar/discussions.flightaware.com/iaina/32/5523_2.png) [@iaina](https://discussions.flightaware.com/u/iaina)\
**Post date:** [January 6, 2018, 3:47pm UTC](https://discussions.flightaware.com/t/weather-forcast-flightxml3/29658/3 "2018-01-06T15:47:59Z")

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you need to pass your api key data in the api call - urlparams for example.