Need help with ManyChat setCustomFields API call failing in Pabbly

[Aditya Gaikwad]

Hi team,


I need help with a ManyChat setCustomFields API call using Pabbly’s Custom API module.


My subscriber_id is valid and the custom fields exist in ManyChat with exact names.
I’ve double-checked everything — headers, method, field names, and values — but I still get this error:
Can you please check the setup on your side and let me know if there’s anything in how Pabbly is sending the request that might be causing this?


Thanks a lot!
pabbly Workflow Link - https://connect.pabbly.com/workflow/mapping/IjU3NjYwNTY4MDYzNDA0MzY1MjZjNTUzNTUxMzQi_pc in Update MC from AllQLDs
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[Preeti Paryani]

Hello @Aditya Gaikwad,

Could you please share the specific endpoint from ManyChat's API documentation that you're trying to use? This will help us better understand the API structure and request format so we can assist you more accurately with setting up the custom action in Pabbly.