# 403 when installing private app Cannot connect to proxy

**URL:** <https://community.developer.atlassian.com/t/403-when-installing-private-app-cannot-connect-to-proxy/57523>\
**Category:** Bitbucket Cloud\
**Tags:** proxy, connect-descriptor, base-url, atlassian-connect\
**Created:** [April 13, 2022, 8:40pm UTC](https://community.developer.atlassian.com/t/403-when-installing-private-app-cannot-connect-to-proxy/57523 "2022-04-13T20:40:24Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![CodeReviewDoctor](https://avatars.discourse-cdn.com/v4/letter/c/c5a1d2/32.png) [@CodeReviewDoctor](https://community.developer.atlassian.com/u/CodeReviewDoctor)\
**Post date:** [April 13, 2022, 8:40pm UTC](https://community.developer.atlassian.com/t/403-when-installing-private-app-cannot-connect-to-proxy/57523/1 "2022-04-13T20:40:24Z")

</div>

I am trying to write an app for the marketplace. I have an app descriptor that points to a AWS API gateway.

When I try to add app by submitting a link to the app descriptor JSON file using “Install app from URL” …/workspace/settings/addon-management I enter this:

[https://s3.eu-west-2.amazonaws.com/codereview.doctor/bitbucket-staging.json](https://s3.eu-west-2.amazonaws.com/codereview.doctor/bitbucket-staging.json)

when I submit the first step works OK. I click “grant access” but then I get error:

problem installing the app. The app failed to be installed: Error calling installed at URL \<the\_url\>: HTTPSConnectionPool(host=‘\<the\_host\>’, port=443): Max retries exceeded with url: /default/bitbucket-events/ (Caused by ProxyError(‘Cannot connect to proxy.’, error(‘Tunnel connection failed: 403 Forbidden’,)))

However according to my server logs no request is being made to the API gateway URL

Is this a known problem?

If I manually do a POST request to the endpoint specified in the app descriptor then I get a 200 response.

Oddly if I add a proxy (beeceptor) so baseUrl" is set to and that url just proxies the API gatweay url then everything works.

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<div class="post-metadata">

**Author:** ![CodeReviewDoctor](https://avatars.discourse-cdn.com/v4/letter/c/c5a1d2/32.png) [@CodeReviewDoctor](https://community.developer.atlassian.com/u/CodeReviewDoctor)\
**Post date:** [May 4, 2022, 10:15pm UTC](https://community.developer.atlassian.com/t/403-when-installing-private-app-cannot-connect-to-proxy/57523/2 "2022-05-04T22:15:11Z")

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bitbucket worked as soon as I changed my endpoint from eu-east-1 to any other region