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How do I interact with a custom built GPT? (OpenAI GPT Builder)

  • 29 December 2023
  • 29 replies

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I have been using the preset action/events for ChatGPT such as ‘Conversation’ and ‘Conversation with Assistant’. The latter is useful to me because the GPT Assistants can be pre-loaded with knowledge and the Zapier action which has been configured has conversation history which is essential for my implementation.

I have however now built my own GPT using the new GPT Builder feature on ChatGPT PLUS, this is similar to a GPT assistant but with more customisation. I would now like to interact with my custom built GPT in the same way I can interact with an assistant however there is no preset action to interact with a GPT builder instance.

I am guessing this requires me to build a custom action using API calls however I do not have a tech background so this is beyond me. If anyone can help me create a custom action with identical features to ‘conversation with assistant’ but instead make it conversation with a custom built GPT’ that would be amazing!!

Thanks guys


Best answer by SamB 26 February 2024, 10:09

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Hi @Nick_JustChill 👋

There isn’t a workaround to access a GPT, even by using another application. Currently the limitation is on OpenAI’s end as it’s not possible to get external access to GPTs:  
So it won’t be possible to interact with an OpenAI GPT until OpenAI allow API access to GPTs.

The alternative they suggest using is to use their Assistants API. The ChatGPT app on Zapier has actions like the “Conversation With Assistant action” which would allow you to interact with an OpenAI Assistant as it uses their Assistants API. You can learn more about interacting with OpenAI’s Assistants here.

We’ll be keeping an eye on things and will be sure to post an update in the thread here should it become possible to interact with a GPT in a Zap in the future.

Hi All,


Does anyone know of a workaround, possibly involving a different application? It's surprising that such a crucial function isn't receiving more attention and effort from Zapier to find a solution.

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Hi @sKunZel!

The feature request is still closed and I can’t make any promises as to when it might become possible to interact with a custom GPT in a Zap. But we’ve added your vote so we’ll be in touch if/when it becomes possible. 

There isn’t a app on Zapier currently but I’ve added it to our internal wishlist on your behalf. It doesn’t guarantee that it will definitely be added to Zapier but we’ll be sure to contact you if it is.

In the meantime, if they have a publicly available API then you might be able to connect to using a Webhooks action, if it supports basic authentication (See: Send webhooks in Zaps). If it requires more advanced authentication methods then you’d need to build a private integration for it on the Developer Platform. You can learn more about how to do that here:

Hope that helps! 🙂

Please add my vote too for custom GPT support! Thanks

(Because i think of that now, a thought for integration.
Here some details, Actions would be “Start with Lyrics” including a “Make Random Lyrics”, “Choose a Style” and "Continue From This Song" & “Get Full Song”)

Both of you are amazing, together … It will be a great thing for my final goal which his a fully automated process : 
-  From ChatGPT to Google Sheets to Suno , into a download of thoses songs in a Drive.

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Hey @TechRon! 👋

Your vote has been added. That said, the feature request has been closed for now as it’s not currently possible due to limitations on OpenAI’s end. If things change with OpenAI and it becomes possible to add support for custom GPTs we’ll be sure to reopen the feature request, and get in touch if it’s implemented. 🙂

Please add my vote for custom GPT support! Thanks

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Thanks @TORLEY, really appreciate your understanding on this. 🤗

Hopefully things will change on OpenAI’s end and we’ll be able to revisit this in the near future! 🤞

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@SamB While this is disappointing to hear, it’s beyond Zapier’s control and we understand. Thanks for the update.

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Hi there @ItsBusinessBro,@surf4life,@twissman 👋

Thanks for sharing your interest here. Your votes have been added to the feature request but unfortunately the team have now decided not to pursue that feature request at this time. As after further investigation it was confirmed that it is not currently possible to get external access to GPTs


Sorry for the less than ideal news here. If anything changes on the status of this feature request, we’ll be sure to let you all know right away! 

Please do reach out in the Community if you have any questions in the meantime.

please also update me

add me to the list as well please. this is a crucial feature request. Whoever implements this first will get my business. I count on you Zapier. Also let me know when this feature is released. thanks in advance

Please let me know when this is available as well, very excited!

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I’ve added you to the list as well now @Jordaan. 🙂

I can’t make any promises on whether support for custom GPTs added will definitely be implemented or give any sort of timeline on this. 

But we will definitely notify everyone here by email if it is added. And we’ll keep this thread updates with any news or workarounds we come across in the meantime. 

Will it be possible to use publics custom GPTs in our zaps in the future ? (not only the GPTs we build).


I’m interested too ! I’d like to be notified when available please

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Your vote has now been added, @Earl AdSkills! 😁

I can’t make any promises as to when this functionality might become available but you can expect an email from us as soon as it is.

Yes please! Defo need this in my life. Thank you. 🙂

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Hi @RichieWray 👋

I’ve just re-checked the feature request and it’s still open. Really wish I could provide some sort of ETA on when you might be able to expect it to be implemented by. Please know that as soon as we have any news on this we’ll be sure to share it in the thread here. 

For now, I’ve added your vote to the feature request so we’ll definitely contact you once this functionality becomes available. Thanks for everyone’s continued patience in the meantime. 

Any updates on this functionality becoming available?


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Hi @FoxLive!

Thanks for expressing your interest in having support for custom GPTs added to the ChatGPT app on Zapier. I’ve added your vote to the feature request for this. As I mentioned previously, we can’t share any estimates for when or if this will definitely be implemented, but we’ll definitely email you if it is added. 🙂


I’m also very interested by this feature, let me know when it will be available please 🙏

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Hi @Zappyboy, thanks for reaching out here 🙂

I did some checking and it appears that there’s recently been a feature request opened up for custom GPT support to be added to the ChatGPT app which our Support team have already added you too. 

So I’ve gone ahead and the votes of everyone in this thread to that feature request here to help increase it’s priority. While I can’t provide any estimate as to when it might become possible to interact with a GPT in a Zap but we’ll notify you all by email the minute it is! 

This feature is so crucial - where can i support the feature request. Iv’e been up for days trying to wrap my head around a solution but nothing comes close to a clean direct prompt to your custom gpt 😓

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Apologies for the delay in my reply here @TORLEY and @wb-social.

I’m not aware of any plans on that front - there don’t appear to be any existing feature requests open to have custom GPT access added to the ChatGPT or OpenAI apps. I’d recommend reaching out to the Support team to flag your interest in this, they’ll be able to open up a feature request for that so we can start tracking user interest in being able to interact with a GPT via a Zap. You can get in touch with them via the contact form here:

Sorry to not have a more immediate solution here. If I do hear any news around this I’ll be sure to share it with y’all here! 

Userlevel 1

The marketplace is coming out, and millions, including myself, will want to use their newly purchased GPTS in long chains with Zapier. I'm sure your competitors are all over this.