When adding a new endcall node and set a message my node server.credentialId gets "" and I can't save it. Same when I'm editing an exisiting endcall node message I can't save it anymore because of this error.

To resolve the "credentialId must be a UUID" error when saving your End Call node, ensure that the

server.credentialId

field is either omitted or set to a valid UUID string, not an empty string. For example:

json
"server": {
  "credentialId": "550e8400-e29b-41d4-a716-446655440000"
}

If you do not require a credential, try removing the

credentialId

property entirely from the node's configuration before saving. For more on node configuration, see the [Workflows overview](https://docs.vapi.ai/workflows/overview). Source: - [Workflows overview](https://docs.vapi.ai/workflows/overview)

I can't edit this variable

same with my api request in workflow, any update on this ?

I'm hoping for an update because my workflows are stopped working because of this and I'm trying to convert them into single prompt agents and they don't even work since they're so different

I using single promt agents now. And converted my api call to custom tool

this worked for me: Create a tool for the API call and replace the API request node in your flow with the tool.