The error message “you have reached the maximum of live webhook endpoints” suggests that you’re hitting a platform limit — but not necessarily from n8n itself.
Based on the number (16), one possible explanation is that you’re using Stripe webhooks. Stripe has a documented limit of 16 live webhook endpoints per account. If your n8n workflows each register a unique endpoint with Stripe, and you’ve already reached Stripe’s limit, that could be why you’re seeing this error when trying to activate more workflows.
Here’s what you can do:
Check your Stripe dashboard
Go to Developers → Webhooks and review the list of registered endpoints. See if some of them are no longer needed and can be deleted.
Reuse endpoints if possible
Instead of creating a separate webhook for each event or flow, you might be able to consolidate them into a single endpoint in n8n and then route the events inside the workflow.
Confirm the source of the error
Just to be sure:
Are you using Stripe or another external service that might be enforcing webhook limits?
If not Stripe, let me know which service you’re using — that can help narrow down the cause.
Let me know how it goes! If that helps, please mark my answer as the solution <3
OBS: This was written by AI, but researched and audited by me.