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POST
/
exchange
Cancel order by cloid
curl --request POST \
  --url https://api.hyperliquid.xyz/exchange \
  --header 'Content-Type: application/json' \
  --data '{
  "action": {
    "type": "cancelByCloid",
    "cancels": [
      {
        "asset": 0,
        "cloid": "0x1234567890abcdef1234567890abcdef"
      }
    ]
  },
  "nonce": 1705234567890,
  "signature": {
    "r": "0x1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef",
    "s": "0xfedcba0987654321fedcba0987654321fedcba0987654321fedcba0987654321",
    "v": 27
  },
  "vaultAddress": null
}'
{
  "status": "<string>",
  "response": {
    "type": "<string>",
    "data": {
      "statuses": [
        "<any>"
      ]
    }
  }
}
This endpoint requires signature authentication. See our comprehensive Authentication via Signatures guide for implementation details.
Cancels one or multiple open orders by client order ID (cloid) on the Hyperliquid exchange. This is useful when you want to cancel orders using your own tracking IDs rather than the exchange-generated order IDs.
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​
Parameters

​
Required parameters

  • action (object, required) — The cancel action object containing:
    • type (string) — Must be "cancelByCloid"
    • cancels (array) — Array of cancel objects with:
      • asset (number) — Asset index
      • cloid (string) — Client order ID (128-bit hex string, e.g., 0x1234567890abcdef1234567890abcdef)
  • nonce (number, required) — Current timestamp in milliseconds (must be recent)
  • signature (object, required) — EIP-712 signature of the action

​
Optional parameters

  • vaultAddress (string, optional) — Address when trading on behalf of a vault or subaccount
  • expiresAfter (number, optional) — Timestamp in milliseconds after which the request is rejected

​
Returns

Returns an object with cancellation status:
  • status — "ok" if request processed
  • response — Contains cancellation details:
    • type — "cancelByCloid"
    • data.statuses — Array of status results for each cancellation attempt

​
Example request

curl -X POST https://api.hyperliquid.xyz/exchange \
  -H "Content-Type: application/json" \
  -d '{
    "action": {
      "type": "cancelByCloid",
      "cancels": [{
        "asset": 0,
        "cloid": "0x1234567890abcdef1234567890abcdef"
      }]
    },
    "nonce": 1234567890123,
    "signature": {...}
  }'

​
Client Order ID (cloid)

The client order ID is a 128-bit hexadecimal string that you provide when placing an order. It allows you to:
  • Track orders using your own identification system
  • Cancel orders without needing to store exchange-generated order IDs
  • Implement idempotent order placement strategies
Example cloid format: 0x1234567890abcdef1234567890abcdef

​
Use cases

  • Custom order tracking — Cancel orders using your internal order management system IDs
  • Failover systems — Cancel orders without needing to query order IDs first
  • Multi-system integration — Use consistent order IDs across different systems
  • Idempotent operations — Safely retry cancellations using deterministic IDs
Client order IDs must be unique per user. Attempting to place an order with a duplicate cloid will be rejected.
Make sure to store the cloid when placing orders if you plan to use this cancellation method. The cloid must match exactly what was provided during order placement.

Body

application/json
​
action
object
required
​
nonce
integer
required

Current timestamp in milliseconds

​
signature
object
required

EIP-712 signature of the action with r, s, v components

​
vaultAddress
string

Address when trading on behalf of a vault or subaccount (optional)

​
expiresAfter
integer

Timestamp in milliseconds after which the request is rejected (optional)

Response

200 - application/json

Cancellation result

​
status
string

Request status

​
response
object
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