Issue: API Key Non-Signing Admin Co-Signer Setup

I’m working in the testnet environment and setting up webhooks to be sent from my local endpoint using ngrok. I’ve successfully created an API Key user with a Non-Signing Admin role. However, I’m encountering an issue: It seems I’m being prompted to add a Co-Signer for this API Key user, and I don’t understand why this is necessary. Could anyone offer some guidance or suggestions?

Hi Drewjya,
All API users except EDITOR and VIEWER need to be paired to a cosigner.
https://support.fireblocks.io/hc/en-us/articles/4407823826194-Adding-new-API-Users#:~:text=For%20approving%20workspace%20operations%20or%20signing%20transactions
If you do not wish to pair to to a cosigner kindly create an EDITOR or VIEWER user. Thanks

Thank you for your information. I have some questions regarding webhook testing.

Based on the Fireblocks documentation (Webhooks v2), I understand that I can test webhooks via the dashboard or through the SDK. However, I cannot find the ‘test endpoint’ button on the dashboard. Additionally, when I attempted to test it via the SDK, I received a ‘403 Forbidden’ error.