Setting up webhook authentication for

Hi @Jon … hope you good. I’m trying to get the slack events up and running by following the steps from slack to verify my url by responding to the challenge through the ‘Respond to Webhook’ node but no luck.

→ Error from Slack

… so basically my workflow receives the ‘challange’ string but slack doesn’t get the right response. I tried sendin Text and JSON but none of them work. Is n8n maybe too slow with the response?

Any hint or idea would be greatly appreciated.