Add or update signature for mailboxes

POST

https://api.inboxkit.com/v1/api/mailboxes/add-signature

Maintainer:Not configured

Add a signature to multiple mailboxes. If a signature already exists for a mailbox, it will be updated. If not, a new signature will be created.
It is added during export when an API key is provided and works only for Instantly.ai

Request

Authorization

Provide your bearer token in the

Authorization

header when making requests to protected resources.

Example:

Authorization: Bearer ********************

Header Params

Body Params application/jsonRequired

Examples

Responses

🟢200

application/json

Signatures processed successfully

Body

🟠400

🟠401

🔴500

Request Example

Shell

JavaScript

Java

Swift

curl --location --request POST 'https://api.inboxkit.com/v1/api/mailboxes/add-signature' \
--header 'X-Workspace-Id;' \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data-raw '{
    "mailbox_uids": [
        "uid1",
        "uid2",
        "uid3"
    ],
    "signature": "<p>Best regards,<br>John Doe</p>"
}'

Response Example

{
    "error": false,
    "message": "Signatures processed successfully",
    "results": {
        "updated": [
            "uid1"
        ],
        "created": [
            "uid2"
        ],
        "failed": [
            {
                "uid": "uid3",
                "reason": "Mailbox not found or does not belong to workspace"
            }
        ]
    },
    "summary": {
        "total_requested": 3,
        "updated_count": 1,
        "created_count": 1,
        "failed_count": 1
    }
}

Modified at 2025-12-13 10:32:31

List mailboxes

Delete signature for mailboxes