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POST
Confirm Attachment Upload
Confirm that a file has been successfully uploaded to the presigned URL. This step is required before the attachment can be used in emails.

Path Parameters

string
required
The attachment ID received from the createUpload endpoint (e.g., att_abc123).

Examples

Response

boolean
Indicates whether the confirmation was successful.
Example Response

Attachment Status

Errors

Attachments expire 7 days after confirmation. If you need to send the same file again after expiration, you’ll need to create a new upload.

Reusing Attachments

Once confirmed, an attachment ID can be reused in multiple emails until it expires: