API - PUT (Update) a Contact - Unable to create note

[user96696]

When using PUT (Update a Contact), and attempting to add a note, I get the error "The specified sub-resource 'note' was not found."  This is happening in both my app (Power Automate Flow) and on Constant Contact's API Tester.  Any assistance would be greatly appreciated.

Example Payload sent to the API Tester:

{
        "contact_id": "5f4697e6-3001-11ef-9cf5-fa163e72f71d",
        "update_source": "Contact",
"email_address": {

    "address": "someone@email.com",
    "permission_to_send": "temp_hold",
    "opt_out_reason": "I am no longer interested in this service."

},
        "notes": [
            {
                "note_id": "b4b14c7f-b1b7-49fd-9075-2ed13fdf7cb2",
                "created_at": "2025-03-12T15:34:09.1983454Z",
                "content": "Note Body"
            }
        ]
    }

Returned Error:

[
{
"error_key": "contacts.api.bad_request",
"error_message": "The specified sub-resource 'note' was not found."
}
]

[John__B · Accepted solution]

Hello user96696,

Thank you for reaching out to Constant Contact API Developer Support. My team is here to assist outside software developers with questions about building into Constant Contact's API.

I’ve reviewed your account for the corresponding contact of the contact ID you provided in your example payload and found that the contact does not currently have any notes saved. This is why the “specified sub-resource 'note' was not found." error was returned when providing the “note_id” in the request. You should be able to successfully add a new note for this contact by removing the “note_id” portion of the “notes” array in the request. 

Once the new note has been created, you can edit it by copying the “note_id” from the endpoint’s response and providing it in future PUT (update) requests to the /contacts endpoint for this contact. 

Please have a look and let us know if you have any other questions!

Regards,