Reply to an email

POST

https://api.plusvibe.ai/api/v1/unibox/emails/reply

Sends a reply to an existing email. You can also reply to an email in the Others folder by passing its id (from the unibox/other-emails endpoint) as reply_to_id — once the reply is sent, that conversation moves out of the Others folder into your main emails list (unibox/emails).
IMPORTANT:

To ensure your reply appears in the same email thread, it’s recommended to include “Re: ” in the subject line, for example: “Re: Original Subject Line”.

The body field accepts HTML, so any quotes or special characters inside it must be escaped when sending as JSON.

Request

Authorization

API Key

Add parameter in header

x-api-key

Example:

x-api-key: ********************

Query Params

Body Params application/json

Examples

Responses

🟢200OK

application/json

Successful reply

Bodyapplication/json

🟠400Bad Request

🔴500Server Error

Request Example

Shell

JavaScript

Java

Swift

curl --location 'https://api.plusvibe.ai/api/v1/unibox/emails/reply?workspace_id=undefined' \
--header 'x-api-key: <api-key>' \
--header 'Content-Type: application/json' \
--data-raw '{
    "reply_to_id": "66b9d78ff91fabf920f6964d",
    "subject": "Re: Summer Promotion Campaign",
    "from": "sender@account.com",
    "to": "client@example.com",
    "body": "Please see the video link attached.",
    "cc": "cc@example.com",
    "bcc": "bcc@example.com",
    "attachments": [
        {
            "file_name": "report.pdf",
            "content": "string"
        }
    ]
}'

Response Example

200 - Example 1

{
    "status": "success",
    "id": "66b9d78ff91fabf920f6964d"
}

Modified at 2026-07-26 17:00:38

Get count of unread emails

Forward an existing email