Place Order

Endpoint

POST /exchange

Request Body

Parameter	Type	Description
`action`*	object	See below
`action.type`*	string	Must be `"order"`
`action.orders`*	array	One or more order specs
`action.orders[].a`*	string	8-char AssetId hex string
`action.orders[].b`*	boolean	`true` for buy, `false` for sell
`action.orders[].p`*	string	Price, or `"0"` for market
`action.orders[].s`*	string	Order size; use `"0"` only for tracked full-position `positionTpsl` trigger orders
`action.orders[].r`	boolean	Reduce-only
`action.orders[].t`*	object	Limit or trigger config
`action.orders[].c`	number	Optional client id
`action.grouping`*	string	`"na"` for standalone orders, `"normalTpsl"` for parent-attached TP/SL, or `"positionTpsl"` for position-attached TP/SL
`nonce`*	number	Replay-protection nonce
`expiresAfter`	number	Optional expiration timestamp in ms
`signature`*	object	EIP-712 signature

Response

{
  "status": "ok",
  "response": {
    "type": "order",
    "data": {
      "statuses": [
        { "resting": { "oid": "0x1a2b3c..." } },
        { "filled": { "oid": "0x4d5e6f...", "totalSz": "0.1", "avgPx": "50000.0" } },
        {
          "filled": { "oid": "0x7a8b9c...", "totalSz": "0.05", "avgPx": "50010.0" },
          "resting": { "oid": "0x7a8b9c..." }
        },
        { "pending": { "cloid": "0xabcdef..." } },
        { "prefunding": { "cloid": "0x1111...", "reason": "protocol_spot_prefund" } },
        { "pendingTrigger": { "cloid": "0x2222..." } },
        { "pendingParentFill": { "cloid": "0x3333..." } }
      ]
    }
  },
  "metadata": {
    "results": [
      { "orderId": "0x1a2b3c...", "status": "accepted", "venueOid": 12345 },
      {
        "orderId": "0x4d5e6f...",
        "status": "filled",
        "venueOid": 12346,
        "totalSz": "0.1",
        "avgPx": "50000.0"
      },
      {
        "orderId": "0x7a8b9c...",
        "status": "partialFill",
        "venueOid": 12347,
        "totalSz": "0.05",
        "avgPx": "50010.0"
      },
      { "orderId": "0xabcdef...", "status": "pending" },
      { "orderId": "0x1111...", "status": "prefunding" },
      { "orderId": "0x2222...", "status": "pendingTrigger" },
      { "orderId": "0x3333...", "status": "pendingParentFill" }
    ]
  }
}

Status Variants

Response status	Meaning
`resting.oid`	Accepted by Notional. For standard orders this means resting on the book; for TP/SL child orders it can still represent a locally accepted child awaiting parent fill
`filled`	Fully filled immediately
`filled` + `resting`	Partially filled, remainder resting
`pending.cloid`	Submitted but exchange confirmation timed out
`prefunding.cloid`	Spot buy accepted locally while protocol spot pre-funding is pending
`pendingTrigger.cloid`	Local trigger intent accepted and waiting for trigger detection
`pendingParentFill.cloid`	Normal TP/SL child accepted and waiting for the parent order to fill
`error`	Validation or exchange failure

Example Request

curl -X POST https://api.notional.xyz/exchange \
  -H "Content-Type: application/json" \
  -d '{
    "action": {
      "type": "order",
      "orders": [
        {
          "a": "00020000",
          "b": true,
          "p": "50000.0",
          "s": "0.1",
          "r": false,
          "t": { "limit": { "tif": "Ioc" } }
        }
      ],
      "grouping": "na"
    },
    "nonce": 1701234567890,
    "signature": {
      "r": "0x1234...",
      "s": "0x5678...",
      "v": 27
    }
  }'

Notes

Maximum batch size is 20 orders. - action.orders[].a is always an 8-character AssetId hex string. - Supported markets include perpetuals and supported spot-pair buy and sell orders. Spot buys may return prefunding before venue submission. - metadata.results[].orderId is the internal Notional order id used by cancel and modify. - action.orders[].isPositionTpsl is internal-only and must not be sent. Use action.grouping="positionTpsl" instead. - Resting reduce-only limit orders are disabled; use market, IOC, stop, or take-profit reduce-only orders. - On reduce-only positionTpsl trigger orders, action.orders[].s = "0" means “track the full live position size”; an explicit positive size creates a fixed-size position TP/SL.

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Endpoint

Request Body

Response

Status Variants

Example Request

Notes