---
title: sync.findRefs | Doing Work API
description: List outside ids a shop has recorded for one system. Filter by kind, by the outside id (to find the Doing Work record for it), or by Doing Work ids.
url: https://doingwork.work/docs/reference/sync-findrefs/
---

# sync.findRefs

List outside ids a shop has recorded for one system. Filter by kind, by the outside id (to find the Doing Work record for it), or by Doing Work ids.

|  |  |
|---|---|
| Who | Agents can call this |
| REST | `GET /v1/sync/refs` |
| MCP tool | `sync_findRefs` |
| Writes | no |
| Area | [Shop](https://doingwork.work/docs/reference/#shop) |

## When to use it

Doing Work does not connect to QuickBooks itself. Your agent does the sync, on the schedule the shop picks: daily is a good default, and the shop can ask for more or less often.

## What to tell the owner

Tell them what you found in plain words. Don't read back raw fields.

## Input

| Field | Type | Required |
|---|---|---|
| `shop_id` | string | yes |
| `system` | string | yes |
| `kind` | string (one of invoice, payment, refund, customer) | no |
| `external_id` | string | no |
| `ids` | array | no |
| `limit` | integer | no |
| `cursor` | string | no |

## Example

```http
GET https://doingwork.work/v1/sync/refs?shop_id=00000000-0000-4000-8000-000000000000&system=...
```

## Output

| Field | Type | Always there |
|---|---|---|
| `data` | array | yes |
| `data[].kind` | string | yes |
| `data[].id` | string (uuid) | yes |
| `data[].system` | string | yes |
| `data[].external_id` | string | yes |
| `data[].updated_at` | string (date-time) | yes |
| `next_cursor` | ['string', 'null'] | yes |

```json
{
  "data": [
    {
      "kind": "...",
      "id": "00000000-0000-4000-8000-000000000000",
      "system": "...",
      "external_id": "00000000-0000-4000-8000-000000000000",
      "updated_at": "..."
    }
  ],
  "next_cursor": "..."
}
```

## Errors

| Code | Status | What to do |
|---|---|---|
| `invalid_input`, `invalid_token`, `rate_limited` |  | Can happen on any call. See [errors](https://doingwork.work/docs/errors/). |