Hubspot Custom Connector Authentication

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Posted on 15 Apr 2022 15:08:52 by Zap174

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I am trying to connect Power Automate to a Private App in Hubspot. When defining the security permissions for the custom connector, these are my settings:

As stated here: Authentication Overview | HubSpot API

I then establish the connection using the value of "Bearer {Private app access token} and test out retrieving contacts but I get the following error:

Has anybody been able to create a custom connection to a private app in Hubspot? If so, how did you go about it? Any help is appreciated!

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Lance_Raeper 8 on 06 Jun 2025 at 00:26:19

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Hubspot Custom Connector Authentication

I have posted an article explaining how to set up a public app to do this. The example used is for mass contact creation, but the approach is generally the same apart from the scopes and specific API actions you require. Other OpenAPI definitions can be imported from here for your use case.

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Zap174 165 on 02 Aug 2022 at 14:28:42

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Re: Hubspot Custom Connector Authentication

@Welbywelb If you figure out how to make the switch to the accepted means of authentication. Please let me know!

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Zap174 165 on 02 Aug 2022 at 13:50:36

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Re: Hubspot Custom Connector Authentication

@Welbywelb Oh man, thanks for the info! Guess I should start switching things over now...Not really sure how to do that but I'll give it my best shot!

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WelbyWelb 62 on 02 Aug 2022 at 09:23:26

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Re: Hubspot Custom Connector Authentication

FYI as per the Hubspot API Key page
Guess this means we all need to convert from basic or API Key security to OAuth before the end of November 2022 😞

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Zap174 165 on 15 Apr 2022 at 15:09:49

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Re: Hubspot Custom Connector Authentication

I was able to create a custom connection using Basic Authentication and including the api key in the query parameters but I want to use the private apps this time as it is more secure and has other features such as the log.

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