Download a message attachment
Download one attachment’s Base64 content by its id from the attachments list — works for both sent (read from the immutable R2 source) and received (saved at ingest) messages.
Authorizations
Org-scoped Norbelys API key. Create one in Settings → API keys and send it as Authorization: Bearer ak_….
Path Parameters
The message id (path).
"act_y3rgwmhkbgxxa2qzmfyrdj0e"
The attachment id from the attachments list (path).
"0"
Response
OK
MIME type.
"application/pdf"
File name.
"invoice.pdf"
The attachment id within the message.
Decoded file size in bytes.
x >= 013264
Base64-encoded file content — decode to get the file.
Always "attachment".
Inline-image Content-ID (for cid: references), if any.
"attachment" or "inline".