> For the complete documentation index, see [llms.txt](https://docs.tronsave.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.tronsave.io/developers/api-reference/fast-charge/cancel-order.md).

# Cancel Order

Cancel one or more pending fast charge orders that have not yet been matched, using your API key.

Cancel one or more fast charge orders by their order IDs. You can only cancel orders that are in **Pending** status and have not been matched yet.

To call this endpoint you need a TronSave API key tied to a prefunded internal account. See [Authentication](/developers/authentication.md) for how to obtain and use an API key.

## Endpoint

<mark style="color:orange;">**`POST`**</mark> **`https://api.tronsave.io/v0/fast-charge-order-cancel`**

{% hint style="info" %}
**Rate limit:** 1 request per 2 seconds.
{% endhint %}

## Headers

<table><thead><tr><th width="131">Name</th><th width="135">Type</th><th>Description</th></tr></thead><tbody><tr><td><code>apikey</code><mark style="color:red;">*</mark></td><td>String</td><td>TronSave API key that is associated with the internal account. Required.</td></tr></tbody></table>

## Request body

<table><thead><tr><th width="190">Name</th><th width="164">Type</th><th>Description</th></tr></thead><tbody><tr><td><code>order_ids</code></td><td>Array</td><td>Array of order IDs. A list of order IDs that have been created and need to be cancelled.</td></tr></tbody></table>

### Request body example

```json
{
    "order_ids": [
        "673c17a3129f1881382e98e3"
    ]
}
```

## Responses

### 200 OK — Success

```json
{
    "cancel_results": [
        {
            "order_id": "673c17a3129f1881382e98e3",
            "is_success": true,
            "fail_reason": null
        }
    ]
}
```

### 400 Bad Request — Validation error

Returned when the request body is missing a required field or has an invalid value. The `message` names the offending property.

```json
{
    "statusCode": 400,
    "code": "FST_ERR_VALIDATION",
    "error": "Bad Request",
    "message": "body must have required property 'order_ids'"
}
```

### 401 Unauthorized — Invalid API key

Returned when the `apikey` header is missing or invalid.

```json
{
    "error": true,
    "message": "TSAS:107 INVALID_API_KEY"
}
```

### 429 Too Many Requests — Rate limit

Returned when you exceed the rate limit (1 request per 2 seconds for this endpoint).

```json
{
    "error": true,
    "message": "Rate limit reached"
}
```

## Request examples

{% tabs %}
{% tab title="cURL" %}

```bash
curl -X POST 'https://api.tronsave.io/v0/fast-charge-order-cancel' \
  -H 'apikey: YOUR_API_KEY' \
  -H 'Content-Type: application/json' \
  -d '{
    "order_ids": [
        "673c17a3129f1881382e98e3"
    ]
  }'
```

{% endtab %}

{% tab title="JavaScript" %}

```javascript
const res = await fetch(
  "https://api.tronsave.io/v0/fast-charge-order-cancel",
  {
    method: "POST",
    headers: {
      apikey: "YOUR_API_KEY",
      "Content-Type": "application/json",
    },
    body: JSON.stringify({
      order_ids: ["673c17a3129f1881382e98e3"],
    }),
  }
);

const data = await res.json();
console.log(data);
```

{% endtab %}

{% tab title="Python" %}

```python
import requests

url = "https://api.tronsave.io/v0/fast-charge-order-cancel"
headers = {
    "apikey": "YOUR_API_KEY",
    "Content-Type": "application/json",
}
body = {
    "order_ids": ["673c17a3129f1881382e98e3"],
}

response = requests.post(url, headers=headers, json=body)
print(response.json())
```

{% endtab %}

{% tab title="Java" %}

```java
import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;

public class CancelOrder {
    public static void main(String[] args) throws Exception {
        String body = """
            {
                "order_ids": [
                    "673c17a3129f1881382e98e3"
                ]
            }
            """;

        HttpClient client = HttpClient.newHttpClient();
        HttpRequest request = HttpRequest.newBuilder()
            .uri(URI.create("https://api.tronsave.io/v0/fast-charge-order-cancel"))
            .header("apikey", "YOUR_API_KEY")
            .header("Content-Type", "application/json")
            .POST(HttpRequest.BodyPublishers.ofString(body))
            .build();

        HttpResponse<String> response =
            client.send(request, HttpResponse.BodyHandlers.ofString());
        System.out.println(response.body());
    }
}
```

{% endtab %}

{% tab title="Go" %}

```go
package main

import (
	"bytes"
	"fmt"
	"io"
	"net/http"
)

func main() {
	body := []byte(`{
		"order_ids": [
			"673c17a3129f1881382e98e3"
		]
	}`)

	url := "https://api.tronsave.io/v0/fast-charge-order-cancel"
	req, _ := http.NewRequest("POST", url, bytes.NewBuffer(body))
	req.Header.Set("apikey", "YOUR_API_KEY")
	req.Header.Set("Content-Type", "application/json")

	resp, err := http.DefaultClient.Do(req)
	if err != nil {
		panic(err)
	}
	defer resp.Body.Close()

	data, _ := io.ReadAll(resp.Body)
	fmt.Println(string(data))
}
```

{% endtab %}

{% tab title="Rust" %}

```rust
use serde_json::json;

fn main() -> Result<(), Box<dyn std::error::Error>> {
    let client = reqwest::blocking::Client::new();

    let body = json!({
        "order_ids": ["673c17a3129f1881382e98e3"]
    });

    let response = client
        .post("https://api.tronsave.io/v0/fast-charge-order-cancel")
        .header("apikey", "YOUR_API_KEY")
        .header("Content-Type", "application/json")
        .json(&body)
        .send()?;

    println!("{}", response.text()?);
    Ok(())
}
```

{% endtab %}
{% endtabs %}

## Next steps

* Review [Authentication](/developers/authentication.md) to set up your API key and internal account.
* See [Errors and rate limits](/developers/errors-and-rate-limits.md) for handling error responses.
* Learn about [Energy and Bandwidth](/concepts/energy-and-bandwidth.md).