Download Attachments

Downloads the raw bytes of a file attachment retrieved during the flow session. **Key Technical Details:** - **Rate Limit (429)**: Access is strictly limited to 1 request every 5 seconds per unique attachment to prevent abuse and reduce infrastructure load during heavy file retrieval. When a flow session completes, its results schema may contain attachment references (such as official PDF reports or generated documents) containing a unique attachment ID. Use this endpoint with the corresponding `session_id` and `attachment_id` to download the file. Supported file types depend on the flow and feature executed (e.g., `application/pdf`, `image/png`, etc.). > This endpoint needs to be executed with an app secret, so should always be used in server side without exposing the secret to customers.