Unable to Upsert Salesforce Object from Node Js

Question

I am trying to do a Upsert operation on a Salesforce Object named "Lead" from a node js. While sending the data i am getting the below error response back from Salesforce

{
    "success": false,
    "errors": [
        {
            "statusCode": "METHOD_NOT_ALLOWED",
            "message": "HTTP Method 'PATCH' not allowed. Allowed are GET,HEAD,POST"
        }
    ]
}

Strange part is that the same upsert functionality is working fine for other Salesforce object but I am getting only for "Lead" object. Please help to share your inputs if someone has a solution.

Thank you for all your support.

Thanks, Janakiram.

Answer 1

does your user have Profile (or permission set) with "Create" and "Edit" right on Leads? What url are you calling? Does your Lead object have an external id field & your user can see/edit it?