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Troubleshooting Invalid client_id error when integrating Zapier with OAuth2

  • May 10, 2025
  • 3 replies
  • 201 views

Hi there,

I’m building a platform and want to integrate Zapier with Oauth2 for my users to be able to connect their accounts to be used with Zapier.

I’ve gone through the documentation and created a new integration.

Everything has gone ok up until this point. When trying to connect with Zapier I’m getting the following:

My understanding is that the client_id should come from my platform, correct? So I created a random client_id string that is used both from my platform (and included in the url parameter “client_id=clientIdString”). And the same string is saved in the integrations Application credentials/Client ID.

 

And a followup question to this. When setting up the authentication, step 5, trying to connect to my app, Zeppier does not seem to include the Authentication token in the request header.

 

I would love to get some help with this so I can launch the Zapier integration in my platform.

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3 replies

Troy Tessalone
Zapier Orchestrator & Solution Partner
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  • Zapier Orchestrator & Solution Partner
  • May 10, 2025

Hi ​@MikeCL 

Zapier Developer Platform help links for OAuth Authentication: https://docs.zapier.com/platform/build/oauth


  • Author
  • Beginner
  • May 10, 2025

Hi ​@Troy Tessalone 

Thanks! That’s the documentation I have been following though.


  • Author
  • Beginner
  • May 14, 2025

Does the client_id has any specific requirements to be valid?