---
title: "Create storage mount mirror"
method: POST
path: "/storage_mounts/mirrors-add"
tags: ["Document AI — Storage Mounts"]
---

# Create storage mount mirror

`POST /storage_mounts/mirrors-add`

## Request

- Base URL: `https://api.paperoffice.ai/latest`
- URL: `https://api.paperoffice.ai/latest/storage_mounts/mirrors-add`
- Auth: HTTP bearer

Add a real-time mirror for a storage mount: every file operation on the source mount is replicated to the target mount. Only sync_mode=realtime is supported; other values return HTTP 400 INVALID_SYNC_MODE with valid_modes. Source and...

## Request body

- object
  - `source_mount_id` integer, required: Source mount ID (data origin)
  - `target_mount_id` integer, required: Target mount ID (mirror destination)
  - `sync_mode` 'realtime': Synchronization mode. Only realtime is supported (replication on every file operation).
  - `priority` integer: Legacy queue priority (compat). Prefer processing_lane Start-SLA (no_sla|sla_24h|sla_12h|sla_6h|sla_1h|instant).

## Response `200`

Success

- SuccessEnvelope: Success envelope. Payload fields are endpoint-specific (top-level fields, `result`/`job_result` for jobs, `data` on some account endpoints).
  - `status` 'success', required
  - `processing_time` union
    - string
    - number
  - `_billing` object

## Other responses

- `4XX`: Error
- `5XX`: Error

---

[API](https://skmtc.dev/paperoffice/apis/paperoffice-ai-api.md) · [All operations](https://skmtc.dev/paperoffice/apis/paperoffice-ai-api/llms.txt) · [OpenAPI document](https://skmtc.dev/paperoffice/apis/paperoffice-ai-api/revisions/c6a6228a4509?raw)