# matching.confirm

Confirm a proposed exact-amount receipt match after finance review. Requires decision, receipt and transaction revisions, proposed target revision when attaching to an existing bank entry, reason and idempotency key. Canonical provider amounts and original evidence are preserved.

`POST /api/v1/accounting/matching.confirm`

Permissions: `accounting:read`, `accounting:write` · Roles: admin, finance · Idempotency key required · Send `expectedRevision`

MCP tool: `accounting_confirm_matching`

## Fields

| Field | Type | Required | Notes |
| --- | --- | --- | --- |
| `decisionId` | string (ID) | Yes | The ID of the related record. |
| `expectedRevision` | integer | Yes | The record's current revision, from the last time you read it. If someone changed the record since, the request is refused with a conflict so you can reload and check before trying again. at most 9007199254740991; greater than 0. |
| `entryId` | string (ID) | Yes | The ID of an accounting entry, from entries.list or attention.mine. |
| `entryRevision` | integer | Yes | The entry's current revision, from the last time you read it. at most 9007199254740991; greater than 0. |
| `transactionId` | string (ID) | Yes | The ID of a bank or card transaction, from transactions.list. |
| `transactionRevision` | integer | Yes | The related record's current revision, from the last time you read it. at most 9007199254740991; greater than 0. |
| `targetEntryId` | string (ID) |  | The ID of the related record. |
| `targetRevision` | integer |  | The related record's current revision, from the last time you read it. at most 9007199254740991; greater than 0. |
| `bankAmountMinor` | string |  | An amount in cents (the currency's smallest unit), written as a whole-number string such as "1250" for $12.50. Whole number written as a string. |
| `exchangeRate` | string |  | Matches ^(?:0\|[1-9]\d{0,8})(?:\.\d{1,18})?$. |
| `exchangeRateDate` | string |  | A date, as YYYY-MM-DD. Date as YYYY-MM-DD. |
| `exchangeRateSource` | string |  | 3–1000 characters. |
| `reason` | string | Yes | A short note saying why, kept in the record's history. 10–1000 characters. |
| `idempotencyKey` | string | Yes | Any unique text you generate once per intended change, so a retried request only happens once. Send it as the Idempotency-Key header instead if you prefer; if you send both they must match. 8–200 characters. |

## Example request

```bash
curl https://app.getoatmilk.com/api/v1/accounting/matching.confirm \
  -H "Authorization: Bearer $OATMILK_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: $(uuidgen)" \
  -d '{
  "decisionId": "9a8b7c6d-5e4f-4a3b-8c2d-1e0f9a8b7c6d",
  "expectedRevision": 3,
  "entryId": "7f0f6c1e-1c1f-4b5e-9c8d-2f5e8e3c1a10",
  "entryRevision": 3,
  "transactionId": "7f0f6c1e-1c1f-4b5e-9c8d-2f5e8e3c1a10",
  "transactionRevision": 3,
  "reason": "Synthetic example from the docs"
}'
```

Reference page: https://app.getoatmilk.com/docs/api/matching.confirm