> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.paradex.trade/api/prod/orders/cancel-by-client-id/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.paradex.trade/_mcp/server.

# Cancel open order by client order id

DELETE https://api.prod.paradex.trade/v1/orders/by_client_id/{client_id}

Reference: https://docs.paradex.trade/api/prod/orders/cancel-by-client-id

## Authentication

- `Authorization` header (required) — API Key authentication via header

## Request

### Path parameters

- `client_id` (string, required) — Client Order Id

### Query parameters

- `market` (string, optional) — Market to cancel orders for

## Errors

### 400 Bad Request Error

Bad Request

- `data` (ResponsesApiErrorData, optional) — any additional data related to the error
- `error` (enum, optional) — unique immutable string identifier for specific error
  - Allowed values: `VALIDATION_ERROR`, `BINDING_ERROR`, `INTERNAL_ERROR`, `NOT_FOUND`, `SERVICE_UNAVAILABLE`, `INVALID_REQUEST_PARAMETER`, `ORDER_ID_NOT_FOUND`, `ORDER_IS_CLOSED`, `ORDER_IS_NOT_OPEN`, `INVALID_ORDER_SIZE`, `CLIENT_ORDER_ID_NOT_FOUND`, `DUPLICATED_CLIENT_ID`, `INVALID_SYMBOL`, `INVALID_TOKEN`, `INVALID_ETHEREUM_ADDRESS`, `INVALID_ETHEREUM_SIGNATURE`, `INVALID_STARKNET_ADDRESS`, `INVALID_STARKNET_SIGNATURE`, `STARKNET_SIGNATURE_VERIFICATION_FAILED`, `ETHEREUM_SIGNER_MISMATCH`, `ETHEREUM_HASH_MISMATCH`, `NOT_ONBOARDED`, `INVALID_TIMESTAMP`, `INVALID_BLOCK_EXPIRATION`, `ACCOUNT_NOT_FOUND`, `MEDIA_NOT_FOUND`, `INVALID_ORDER_SIGNATURE`, `PUBLIC_KEY_INVALID`, `UNAUTHORIZED_ETHEREUM_ADDRESS`, `UNAUTHORIZED_ERROR`, `ETHEREUM_ADDRESS_ALREADY_ONBOARDED`, `EVM_ADDRESS_ALREADY_ONBOARDED`, `MARKET_NOT_FOUND`, `ALLOWLIST_ENTRY_NOT_FOUND`, `USERNAME_IN_USE`, `GEO_IP_BLOCK`, `ETHEREUM_ADDRESS_BLOCKED`, `PROGRAM_NOT_FOUND`, `PROGRAM_NOT_SUPPORTED`, `INVALID_DASHBOARD`, `MARKET_NOT_OPEN`, `MARKET_NOT_SETTLED`, `INVALID_REFERRAL_CODE`, `REQUEST_NOT_ALLOWED`, `PARENT_ADDRESS_ALREADY_ONBOARDED`, `INVALID_PARENT_ACCOUNT`, `INVALID_VAULT_OPERATOR_CHAIN`, `VAULT_OPERATOR_ALREADY_ONBOARDED`, `VAULT_NAME_IN_USE`, `VAULT_NOT_FOUND`, `VAULT_STRATEGY_NOT_FOUND`, `VAULT_LIMIT_REACHED`, `VAULT_DATA_PRIVATE`, `BATCH_SIZE_OUT_OF_RANGE`, `ISOLATED_MARKET_ACCOUNT_MISMATCH`, `NO_ACCESS_TO_MARKET`, `POINTS_SUMMARY_NOT_FOUND`, `ALGO_ID_NOT_FOUND`, `INVALID_DERIVATION_PATH`, `PROFILE_STATS_NOT_FOUND`, `INVALID_CHAIN`, `INVALID_LAYERSWAP_SWAP`, `SOCIAL_USERNAME_IN_USE`, `INVALID_OAUTH_REQUEST`, `RPI_ACCOUNT_NOT_WHITELISTED`, `SYSTEM_STATUS_POST_ONLY`, `SYSTEM_STATUS_CANCEL_ONLY`, `INVALID_MARKETING_CODE`, `OFFER_NOT_FOUND`, `MARKET_MARGIN_RESTRICTED`, `NOT_UNIQUE`, `ACCOUNT_ALREADY_REFERRED`, `ONBOARDING_PERIOD_EXPIRED`, `ONBOARDING_RATE_LIMITED`, `SUBACCOUNTS_LIMIT_EXCEEDED`, `INSUFFICIENT_MIN_CHAIN_BALANCE`, `INSUFFICIENT_EVM_BALANCE`, `PORTFOLIO_MARGIN_ONBOARDING_DISABLED`, `PORTFOLIO_MARGIN_INVALID_ACCOUNT_KIND`, `EVM_VAULT_OPERATORS_DISABLED`, `INVALID_EVM_SIGNATURE`, `EVM_SIGNATURE_VERIFICATION_FAILED`, `INVALID_SUBKEY`, `SUBKEY_NOT_ACTIVATABLE`, `TOKEN_LIMIT_REACHED`, `INVALID_TOKEN_SCOPE`, `IP_NOT_ALLOWED`, `INSUFFICIENT_TRANSFERRABLE_XP`, `TRANSFER_LIMIT_REACHED`, `XP_TRANSFERS_DISABLED`, `BLOCK_TRADE_NOT_FOUND`, `BLOCK_TRADE_NOT_ENABLED`, `BLOCK_TRADE_EXPIRED`, `BLOCK_TRADE_ALREADY_CANCELLED`, `BLOCK_TRADE_INVALID_STATUS`, `BLOCK_TRADE_UNAUTHORIZED`, `BLOCK_TRADE_MISSING_TRADES`, `BLOCK_TRADE_MISSING_SIGNERS`, `BLOCK_TRADE_MISSING_SIGNATURE`, `BLOCK_TRADE_ACCOUNT_MISMATCH`, `BLOCK_TRADE_INVALID_SIGNATURE`, `BLOCK_TRADE_SIGNER_KEY_UNAUTHORIZED`, `BLOCK_TRADE_REPLAYED_SIGNATURE`, `BLOCK_TRADE_SELF_TRADE`, `OFFER_ALREADY_CANCELLED`, `OFFER_INVALID_STATUS`, `OFFER_UNAUTHORIZED`, `OFFER_PARENT_MISMATCH`, `OFFER_PARENT_NOT_ACCEPTING`, `PORTFOLIO_MARGIN_CONFIG_NOT_FOUND`, `MARGIN_CONFIG_NOT_FOUND`, `MMP_CONFIG_INVALID`, `MMP_NOT_ENABLED`, `MMP_MIN_FREEZE_NOT_ELAPSED`, `MMP_NOT_CONFIGURED`
- `message` (string, optional) — detailed description of error and how to address it

## Types

### ResponsesApiErrorData

any additional data related to the error

## Examples

**SDK Code**

```python
import requests
headers = {
  'Accept': 'application/json',
  'Authorization': 'Bearer {JWT}'
}

r = requests.delete('https://api.prod.paradex.trade/v1/orders/by_client_id/{client_id}', headers = headers)

print(r.json())

```

```javascript
const headers = {
  'Accept':'application/json',
  'Authorization':'Bearer {JWT}'
};

fetch('https://api.prod.paradex.trade/v1/orders/by_client_id/{client_id}',
{
  method: 'DELETE',

  headers: headers
})
.then(function(res) {
    return res.json();
}).then(function(body) {
    console.log(body);
});

```

```go
package main
import (
      "bytes"
      "net/http"
)

func main() {

    headers := map[string][]string{
        "Accept": []string{"application/json"},
        "Authorization": []string{"Bearer {JWT}"},
    }

    data := bytes.NewBuffer([]byte{jsonReq})
    req, err := http.NewRequest("DELETE", "https://api.prod.paradex.trade/v1/orders/by_client_id/{client_id}", data)
    req.Header = headers

    client := &http.Client{}
    resp, err := client.Do(req)
    // ...
}

```

```ruby
require 'uri'
require 'net/http'

url = URI("https://api.prod.paradex.trade/v1/orders/by_client_id/client_id")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Delete.new(url)
request["Authorization"] = '<apiKey>'

response = http.request(request)
puts response.read_body
```

```java
import com.mashape.unirest.http.HttpResponse;
import com.mashape.unirest.http.Unirest;

HttpResponse<String> response = Unirest.delete("https://api.prod.paradex.trade/v1/orders/by_client_id/client_id")
  .header("Authorization", "<apiKey>")
  .asString();
```

```php
<?php
require_once('vendor/autoload.php');

$client = new \GuzzleHttp\Client();

$response = $client->request('DELETE', 'https://api.prod.paradex.trade/v1/orders/by_client_id/client_id', [
  'headers' => [
    'Authorization' => '<apiKey>',
  ],
]);

echo $response->getBody();
```

```csharp
using RestSharp;

var client = new RestClient("https://api.prod.paradex.trade/v1/orders/by_client_id/client_id");
var request = new RestRequest(Method.DELETE);
request.AddHeader("Authorization", "<apiKey>");
IRestResponse response = client.Execute(request);
```

```swift
import Foundation

let headers = ["Authorization": "<apiKey>"]

let request = NSMutableURLRequest(url: NSURL(string: "https://api.prod.paradex.trade/v1/orders/by_client_id/client_id")! as URL,
                                        cachePolicy: .useProtocolCachePolicy,
                                    timeoutInterval: 10.0)
request.httpMethod = "DELETE"
request.allHTTPHeaderFields = headers

let session = URLSession.shared
let dataTask = session.dataTask(with: request as URLRequest, completionHandler: { (data, response, error) -> Void in
  if (error != nil) {
    print(error as Any)
  } else {
    let httpResponse = response as? HTTPURLResponse
    print(httpResponse)
  }
})

dataTask.resume()
```