## Submit Position Instructions

**post** `/v1/accounts/{account_id}/positions/instructions`

Submit one or more position instructions (Exercise, Do-Not-Exercise,
Contrary Exercise Advice) against the account.

Batch semantics:

- **All rows accepted** → `200 OK`. Every row is in `data` with
  `status = SENT`.
- **Partial success** → `207 Multi-Status`. `data` contains every
  row; rejected rows carry `status = ENGINE_REJECTED` (or
  `REJECTED`) and `rejection_reason`. The top-level `error`
  summarizes the batch failure.
- **All rows rejected** → `4xx`/`5xx` error response. The HTTP
  status reflects the underlying cause: `409` for duplicate
  `instruction_id`, `400` for validation failures such as DNE/CEA
  on a non-expiry day, `503` if the clearing service is
  unavailable. No `data` is returned.

Pre-flight validation (unknown `instrument_id`, unencodable
`quantity`) short-circuits the whole batch with a `4xx` before any
row is submitted.

### Path Parameters

- `account_id: number`

### Body Parameters

- `instructions: array of object { instruction_type, instrument_id, quantity, instruction_id }`

  - `instruction_type: PositionInstructionType`

    The action to take.

    - `"EXERCISE"`

    - `"DO_NOT_EXERCISE"`

    - `"CONTRARY_EXERCISE"`

  - `instrument_id: string`

    Identifier of the options contract to act on. Unknown ids return 404.

  - `quantity: string`

    Number of contracts to include in the instruction.

  - `instruction_id: optional string`

    Caller-supplied idempotency key. Echoed on the response. The server
    generates a unique id when omitted.

### Returns

- `data: PositionInstructionList`

  - `id: string`

    Server-assigned id. Used as the path parameter on cancel.

  - `account_id: number`

    Account the instruction belongs to.

  - `instruction_id: string`

    Caller-supplied idempotency key echoed from the submit request; the
    server-assigned fallback when none was supplied.

  - `instruction_type: PositionInstructionType`

    The action this instruction requests.

    - `"EXERCISE"`

    - `"DO_NOT_EXERCISE"`

    - `"CONTRARY_EXERCISE"`

  - `instrument_id: string`

    Identifier of the options contract this instruction acts on.

  - `quantity: string`

    Number of contracts included in the instruction.

  - `status: PositionInstructionStatus`

    Current lifecycle status.

    - `"SENT"`

    - `"ACCEPTED"`

    - `"REJECTED"`

    - `"ENGINE_REJECTED"`

    - `"CANCEL_REQUESTED"`

    - `"CANCELLED"`

    - `"CANCEL_FAILED"`

    - `"UNKNOWN"`

  - `symbol: string`

    Options symbol (OSI) for display.

  - `accepted_quantity: optional string`

    Number of contracts accepted by the clearing venue. Populated once
    the instruction reaches `ACCEPTED`.

  - `created_at: optional string`

    When the instruction was first accepted by the service.

  - `rejection_reason: optional string`

    Human-readable explanation populated on any non-success terminal
    status — `REJECTED`, `ENGINE_REJECTED`, or `CANCEL_FAILED`. On a
    `207 Multi-Status` batch submit the top-level `error` field
    summarizes the batch; per-row detail continues to live here.

  - `updated_at: optional string`

    When the instruction's lifecycle state last changed.

### Example

```http
curl https://api.clearstreet.com/v1/accounts/$ACCOUNT_ID/positions/instructions \
    -H 'Content-Type: application/json' \
    -H "Authorization: Bearer $API_KEY" \
    -d '[
          {
            "instruction_type": "EXERCISE",
            "instrument_id": "0195f6d0-a1b2-7c3d-8e4f-5a6b7c8d9e02",
            "quantity": "1",
            "instruction_id": "ui-20260424-001"
          }
        ]'
```

#### Response

```json
{
  "data": [
    {
      "account_id": 122503,
      "id": "0195f6d0-a1b2-7c3d-8e4f-5a6b7c8d9e02",
      "instruction_id": "ui-20260424-001",
      "instruction_type": "EXERCISE",
      "instrument_id": "0195f6d0-a1b2-7c3d-8e4f-5a6b7c8d9e01",
      "quantity": "1",
      "status": "SENT",
      "symbol": "AAPL  280121C00195000"
    }
  ],
  "metadata": {
    "request_id": "0a5c9ebf-a9a7-4f2d-9c7e-f2b5f0b1bd01"
  }
}
```