# Upload an attachment for a registration

> POST /registrations/{registration_id}/attachments

Source: https://docs.trykintsugi.com/reference/2026-07-21/upload-an-attachment-for-a-registration

POST /registrations/{registration_id}/attachments

Upload an attachment for a registration

Attach a file to a registration in the resolved organization, as `multipart/form-data` with the file in the `file` part. Any file type is accepted, up to 10 MB. Returns the stored attachment's metadata. Returns 404 if the registration does not exist or belongs to an organization your credential cannot access, and 413 if the file exceeds the size limit.

Category: Registrations

Path parameters:
registration_id (string, required) - The unique identifier of the registration.

Response fields:
id (string, required) - Kintsugi's unique identifier for the stored attachment.
fileName (string, required) - The uploaded file's name.
mimeType (string, required) - The uploaded file's MIME type, as sent by the client.
fileSizeBytes (integer, required) - The uploaded file's size in bytes.
createdAt (string, required) - When the attachment was stored, as an RFC-3339 UTC timestamp.

Response statuses: 201, 400, 401, 403, 404, 409, 413, 422

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