Skip to main content

Get Support
Have a question? Let's get you an answer!

How Do I...? Troubleshooting Code & Webhooks Developer Zone

Other Help Resources
Wait, there's more! Check out these Community sourced spaces for additional resources.

Zapier Help Center Hire an Expert

Learning Resources
All of our best learning resources can be found here.

Featured Articles Show & Tell Zapier's products AI Hub Zapier Tools Hub

Share your knowledge
Give back to the Community by sharing your automation wins and helping to answer questions.

Share your success See unanswered questions User Groups

Other Learning Resources
Some of our favorite additional ways to upskill your Zapier knowledge.

Zapier Learn Zapier Blog Zapier Webinars

Product Updates
Check out what is new and upcoming with Zapier with our regular product updates.

Product Updates

Early Access Program
Want to join Early Access? Learn more here.

Question

Getting "invalid label" error when assigning custom labels to Gmail emails

  • February 10, 2025
  • 1 reply
  • 51 views
S

This post was split from the topic: 

 

Hello, it worked! I am having another issue with assigning labels to e-mails. It works when Label is Static but when it is Custom is does not work...:

Custom:
 

Static:
 


Many thanks for helping me with this!

This post has been closed for comments. Please create a new post if you need help or have a question about this topic.

1 reply

SamB
Community Manager
Forum|alt.badge.img+11
  • SamBCommunity Manager
  • Community Manager
  • 9751 replies
  • February 11, 2025

Yay! I’m so glad to hear the webhook is working now, ​@saranobrega! 🎉

Hope you don’t mind but as you’re running into a different issue now, I converted your reply into this new topic so we can address it separately.

Ok, so with dropdown fields like that Label field, when a custom value selected the ID for the corresponding option to be selected is expected—rather than the option’s name. In the Label field you can see the ID for each label will appear just under the name of the label.

For example, in the following screenshot you can see that for the test-label label I created in my own Gmail account it has an ID of Label_1272586595321939040:

a3f6c855da6d09e81e88be72b51374b0.png
 

To have the Zap automatically the ID supplied automatically you might want to look at using a lookup table to convert the label name that ChatGPT supplies into the corresponding label ID. You can learn more about how to use lookup tables in Zaps here: Create lookup tables in Zaps.

Alternatively, you could update the prompting on that ChatGPT action to output the relevant label ID instead of the label name. 

Let me know how that goes, happy to help if you get stuck on that or have any questions! 🙂

Terms & ConditionsAccessibility statement