No matter what, even in a new, otherwise empty workflow it says: Save Failed / Failed to save workflow: each value in nodes.tool.server.cerdentialId must be a UUID. Even working systems i cant save any changes on. https://cdn.discordapp.com/attachments/1446154466725330964/1446154467639558164/Screenshot_2025-12-04_160003.png?ex=69436e8d&is=69421d0d&hm=07200d34dc9abebc0926639118842dd12d7efe6c288ba5b81fef5f835296a2a1& https://cdn.discordapp.com/attachments/1446154466725330964/1446154468344332288/Screenshot_2025-12-04_160038.png?ex=69436e8d&is=69421d0d&hm=580b1ab469c7cc1d408920682a4463c9fc1ccc8dfd23ba0cba4b265bcb7bf943&

To resolve the "credentialId must be a UUID" error, create a Custom Credential in your Vapi dashboard and use its credentialId in your API Request node. Example configuration:

json
"server": {
  "url": "https://your-api-endpoint.com",
  "credentialId": "cred_abc123" // Replace with your actual credential UUID
}

Go to the Vapi dashboard, create a credential, and copy its ID into your workflow as shown above. For more details, see the [Vapi server authentication documentation](https://docs.vapi.ai/server-url/server-authentication). Source: - [Server authentication](https://docs.vapi.ai/server-url/server-authentication)

I dont have any Authorization and dont want any.

Hi DAPOLO, It seems you're experiencing issues related to the

credentialId

requirement in Vapi's workflows. To ensure your workflows save successfully, any API Request node must have a valid UUID for the

credentialId

, even if you do not need authorization for your specific API calls. Here's what you can do: 1. **Create a Credential in Vapi Dashboard**: - Navigate to the Custom Credentials section. - Click Create Credential. - Select Bearer Token, enter a name for your credential, and save it. - Copy the generated

credentialId

. 2. **Assign the Credential UUID**: - Update your API Request node in the workflow to include the

credentialId

using the UUID you copied:

json
     "server": {
       "url": "https://your-api-endpoint.com",
       "credentialId": "your-generated-uuid"
     }

3. **Save the Configuration**: - Ensure no empty credential fields are left to avoid errors. Removing unneeded credential properties might also be necessary, as a blank field can cause save failures. For more details, you can check the [Vapi server authentication documentation](https://docs.vapi.ai/server-url/server-authentication). If the problem persists, consider reaching out to Vapi support with your workflow ID for further assistance.