# Cancel one options or stock order

`POST https://app.skylit.ai/api/nexus/v1/trading/wallets/{book}/orders/{orderId}/cancel`

API: Nexus.

Cancels a resting order and gives back the buying power it held. Safe to send twice: a second cancel answers `200` with `meta.alreadyCancelled: true`.

An order that's filled, expired or rejected answers `409 order_not_working`. A stock stop that's been set off, or an options stop whose sell is going through, answers `409 stop_triggered`: it's filling now. A test order's id cancels it in your test log only.

## Authentication

Send your Skylit API key as a bearer token: `Authorization: Bearer <key>`. No other header is accepted.

## Parameters

| Name | In | Type | Required | Description |
| --- | --- | --- | --- | --- |
| `book` | path | string | yes | `main` is your own paper wallet, `agent` is your bot's. (one of `main`, `agent`) |
| `orderId` | path | string (uuid) | yes | The order's id, from the open, the working list or the history. |

## Request body

`application/json`

```json
{
  "test": false
}
```

## Example request

```bash
curl "https://app.skylit.ai/api/nexus/v1/trading/wallets/main/orders/b2c3d4e5-f6a7-4b8c-9d0e-1f2a3b4c5d6e/cancel" \
  -H "Authorization: Bearer $SKYLIT_API_KEY"
```

## Responses

### 200

The order, cancelled.

The limit buy, cancelled. Its $400 is back in buying power.:

```json
{
  "data": {
    "id": "5b0e9a6c-3f1d-4c2e-9a7b-1d2e3f4a5b6c",
    "assetClass": "options",
    "source": "api",
    "book": "main",
    "clientOrderId": "spy-dip-0001",
    "ticker": "SPY",
    "strike": 600,
    "direction": "call",
    "expiration": "2026-10-16",
    "side": "buy",
    "positionEffect": "open",
    "quantity": 2,
    "filledQuantity": 0,
    "orderType": "limit",
    "timeInForce": "day",
    "status": "cancelled",
    "limitPrice": 2,
    "reservedCents": 0,
    "placedAt": "2026-10-12T14:31:07Z",
    "expiresAt": "2026-10-12T20:00:00Z"
  }
}
```

### 400

The request was refused before anything was traded. Codes: `bad_request`, `bad_contract`, `invalid_quantity`, `invalid_price`, `unsupported_asset_class`, `unsupported_order_type`, `only_market_orders`, `limit_price_required` (a limit with no `limitPrice`), `invalid_limit_price` (not in cents, or outside 0.01 to 99,999.99 for options or 999,999.99 for stocks), `stop_price_required` (a stop with no `stopPrice`), `invalid_stop_price` (not in cents, or outside 0.01 to 999,999.99), `invalid_take_profit`, `test_orders_unavailable`, `test_modify_unavailable`.

A typo in the body.:

```json
{
  "error": {
    "code": "bad_request",
    "message": "Unknown field \"quantitty\". See the trades API docs for the fields you can send."
  }
}
```

### 401

No key, or a key that isn't valid. Codes: `missing_api_key`, `invalid_api_key`.

No key sent.:

```json
{
  "error": {
    "code": "missing_api_key",
    "message": "Send your Skylit API key in the Authorization header: Authorization: Bearer YOUR_SKYLIT_API_KEY."
  }
}
```

### 404

Not on your account. Codes: `trade_not_found`, `account_not_found`, `order_not_found`.

Not your trade, or no such trade.:

```json
{
  "error": {
    "code": "trade_not_found",
    "message": "No trade with that id on your account."
  }
}
```

### 409

The order clashes with what you hold or sent before. Codes: `duplicate_position` (with `tradeId`: add to it instead), `trade_closed`, `open_position_limit` (open positions plus resting opens through the API are at 50), `working_order_limit` (50 options and stock orders already resting through the API), `position_size_limit` (an add would take the position past 1,000 contracts or 100,000 shares), `client_order_id_used`, `request_in_progress`, `account_locked`, `account_busy`, `account_ended`, `order_not_working` (it already filled, expired, or was cancelled or rejected), `stop_triggered` (a stop that's been set off is filling now, so it can't be cancelled or changed).

You already hold this contract.:

```json
{
  "error": {
    "code": "duplicate_position",
    "message": "You already hold an open position on this contract. Add to it with POST /api/nexus/v1/trades/{id}/adds (the id is tradeId), or close it first.",
    "tradeId": "6f1c2a4e-8b1d-4c39-9a51-2d7e0b3c9f10"
  }
}
```

### 429

Over a rate limit. Wait `Retry-After` seconds, then retry. Codes: `rate_limited`, and `stream_limit_reached` (too many live streams open: 3 per key, 6 per account).

Headers: `Retry-After`, `X-RateLimit-Limit`, `X-RateLimit-Remaining`.

Too many writes from this key.:

```json
{
  "error": {
    "code": "rate_limited",
    "message": "Too many requests (limit 30). Slow down and retry in 12 seconds."
  }
}
```

### 503

Try again in a moment (honour `Retry-After` when it's sent). Codes: `stale_quote` (the quote, or a stock's last trade, is more than 15 seconds old, so nothing filled), `no_live_price`, `rules_pending`, `unavailable`, `auth_unavailable`, `access_check_unavailable`, `api_keys_unavailable`, `trades_api_disabled`, `stream_unavailable` (the live stream isn't on, or the server is restarting: try again shortly, or poll the reads).

Headers: `Retry-After`.

No live price right now.:

```json
{
  "error": {
    "code": "no_live_price",
    "message": "There's no live price for this contract right now, so nothing was filled. Try again in a moment."
  }
}
```