---
title: Save new value for on-demand concurrency cap
description: Datadog, the leading service for cloud-scale monitoring.
breadcrumbs: Docs > API Reference > Synthetics
---

# Save new value for on-demand concurrency cap{% #save-new-value-for-on-demand-concurrency-cap %}
Copy pageCopied
{% tab title="v2" %}

| Datadog site      | API endpoint                                                                            |
| ----------------- | --------------------------------------------------------------------------------------- |
| ap1.datadoghq.com | POST https://api.ap1.datadoghq.com/api/v2/synthetics/settings/on_demand_concurrency_cap |
| ap2.datadoghq.com | POST https://api.ap2.datadoghq.com/api/v2/synthetics/settings/on_demand_concurrency_cap |
| app.datadoghq.eu  | POST https://api.datadoghq.eu/api/v2/synthetics/settings/on_demand_concurrency_cap      |
| app.ddog-gov.com  | POST https://api.ddog-gov.com/api/v2/synthetics/settings/on_demand_concurrency_cap      |
| us2.ddog-gov.com  | POST https://api.us2.ddog-gov.com/api/v2/synthetics/settings/on_demand_concurrency_cap  |
| app.datadoghq.com | POST https://api.datadoghq.com/api/v2/synthetics/settings/on_demand_concurrency_cap     |
| us3.datadoghq.com | POST https://api.us3.datadoghq.com/api/v2/synthetics/settings/on_demand_concurrency_cap |
| us5.datadoghq.com | POST https://api.us5.datadoghq.com/api/v2/synthetics/settings/on_demand_concurrency_cap |

### Overview

Save new value for on-demand concurrency cap. This endpoint requires the `billing_edit` permission.

### Request

#### Body Data (required)

.

{% tab title="Model" %}

| Field                     | Type   | Description                             |
| ------------------------- | ------ | --------------------------------------- |
| on_demand_concurrency_cap | double | Value of the on-demand concurrency cap. |

{% /tab %}

{% tab title="Example" %}

```json
{
  "on_demand_concurrency_cap": 20
}
```

{% /tab %}

### Response

{% tab title="200" %}
OK
{% tab title="Model" %}
On-demand concurrency cap response.

| Parent field | Field                     | Type   | Description                                                                      |
| ------------ | ------------------------- | ------ | -------------------------------------------------------------------------------- |
|              | data                      | object | On-demand concurrency cap.                                                       |
| data         | attributes                | object | On-demand concurrency cap attributes.                                            |
| attributes   | on_demand_concurrency_cap | double | Value of the on-demand concurrency cap.                                          |
| data         | type                      | enum   | On-demand concurrency cap type. Allowed enum values: `on_demand_concurrency_cap` |

{% /tab %}

{% tab title="Example" %}

```json
{
  "data": {
    "attributes": {
      "on_demand_concurrency_cap": "number"
    },
    "type": "string"
  }
}
```

{% /tab %}

{% /tab %}

{% tab title="429" %}
Too many requests
{% tab title="Model" %}
API error response.

| Field                    | Type     | Description       |
| ------------------------ | -------- | ----------------- |
| errors [*required*] | [string] | A list of errors. |

{% /tab %}

{% tab title="Example" %}

```json
{
  "errors": [
    "Bad Request"
  ]
}
```

{% /tab %}

{% /tab %}

### Code Example

##### 
                          \## default
# 
 \# Curl command curl -X POST "https://api.datadoghq.com/api/v2/synthetics/settings/on_demand_concurrency_cap" \
-H "Accept: application/json" \
-H "Content-Type: application/json" \
-H "DD-API-KEY: ${DD_API_KEY}" \
-H "DD-APPLICATION-KEY: ${DD_APP_KEY}" \
-d @- << EOF
{
  "on_demand_concurrency_cap": 20
}
EOF 
                        
##### 

```go
// Save new value for on-demand concurrency cap returns "OK" response

package main

import (
	"context"
	"encoding/json"
	"fmt"
	"os"

	"github.com/DataDog/datadog-api-client-go/v2/api/datadog"
	"github.com/DataDog/datadog-api-client-go/v2/api/datadogV2"
)

func main() {
	body := datadogV2.OnDemandConcurrencyCapAttributes{
		OnDemandConcurrencyCap: datadog.PtrFloat64(20),
	}
	ctx := datadog.NewDefaultContext(context.Background())
	configuration := datadog.NewConfiguration()
	apiClient := datadog.NewAPIClient(configuration)
	api := datadogV2.NewSyntheticsApi(apiClient)
	resp, r, err := api.SetOnDemandConcurrencyCap(ctx, body)

	if err != nil {
		fmt.Fprintf(os.Stderr, "Error when calling `SyntheticsApi.SetOnDemandConcurrencyCap`: %v\n", err)
		fmt.Fprintf(os.Stderr, "Full HTTP response: %v\n", r)
	}

	responseContent, _ := json.MarshalIndent(resp, "", "  ")
	fmt.Fprintf(os.Stdout, "Response from `SyntheticsApi.SetOnDemandConcurrencyCap`:\n%s\n", responseContent)
}
```

#### Instructions

First [install the library and its dependencies](https://docs.datadoghq.com/api/latest.md?code-lang=go) and then save the example to `main.go` and run following commands:
    DD_SITE="datadoghq.com" DD_API_KEY="<API-KEY>" DD_APP_KEY="<APP-KEY>" go run "main.go"
##### 

```java
// Save new value for on-demand concurrency cap returns "OK" response

import com.datadog.api.client.ApiClient;
import com.datadog.api.client.ApiException;
import com.datadog.api.client.v2.api.SyntheticsApi;
import com.datadog.api.client.v2.model.OnDemandConcurrencyCapAttributes;
import com.datadog.api.client.v2.model.OnDemandConcurrencyCapResponse;

public class Example {
  public static void main(String[] args) {
    ApiClient defaultClient = ApiClient.getDefaultApiClient();
    SyntheticsApi apiInstance = new SyntheticsApi(defaultClient);

    OnDemandConcurrencyCapAttributes body =
        new OnDemandConcurrencyCapAttributes().onDemandConcurrencyCap(20.0);

    try {
      OnDemandConcurrencyCapResponse result = apiInstance.setOnDemandConcurrencyCap(body);
      System.out.println(result);
    } catch (ApiException e) {
      System.err.println("Exception when calling SyntheticsApi#setOnDemandConcurrencyCap");
      System.err.println("Status code: " + e.getCode());
      System.err.println("Reason: " + e.getResponseBody());
      System.err.println("Response headers: " + e.getResponseHeaders());
      e.printStackTrace();
    }
  }
}
```

#### Instructions

First [install the library and its dependencies](https://docs.datadoghq.com/api/latest.md?code-lang=java) and then save the example to `Example.java` and run following commands:
    DD_SITE="datadoghq.com" DD_API_KEY="<API-KEY>" DD_APP_KEY="<APP-KEY>" java "Example.java"
##### 

```python
"""
Save new value for on-demand concurrency cap returns "OK" response
"""

from datadog_api_client import ApiClient, Configuration
from datadog_api_client.v2.api.synthetics_api import SyntheticsApi
from datadog_api_client.v2.model.on_demand_concurrency_cap_attributes import OnDemandConcurrencyCapAttributes

body = OnDemandConcurrencyCapAttributes(
    on_demand_concurrency_cap=20.0,
)

configuration = Configuration()
with ApiClient(configuration) as api_client:
    api_instance = SyntheticsApi(api_client)
    response = api_instance.set_on_demand_concurrency_cap(body=body)

    print(response)
```

#### Instructions

First [install the library and its dependencies](https://docs.datadoghq.com/api/latest.md?code-lang=python) and then save the example to `example.py` and run following commands:
    DD_SITE="datadoghq.com" DD_API_KEY="<API-KEY>" DD_APP_KEY="<APP-KEY>" python3 "example.py"
##### 

```ruby
# Save new value for on-demand concurrency cap returns "OK" response

require "datadog_api_client"
api_instance = DatadogAPIClient::V2::SyntheticsAPI.new

body = DatadogAPIClient::V2::OnDemandConcurrencyCapAttributes.new({
  on_demand_concurrency_cap: 20,
})
p api_instance.set_on_demand_concurrency_cap(body)
```

#### Instructions

First [install the library and its dependencies](https://docs.datadoghq.com/api/latest.md?code-lang=ruby) and then save the example to `example.rb` and run following commands:
    DD_SITE="datadoghq.com" DD_API_KEY="<API-KEY>" DD_APP_KEY="<APP-KEY>" rb "example.rb"
##### 

```rust
// Save new value for on-demand concurrency cap returns "OK" response
use datadog_api_client::datadog;
use datadog_api_client::datadogV2::api_synthetics::SyntheticsAPI;
use datadog_api_client::datadogV2::model::OnDemandConcurrencyCapAttributes;

#[tokio::main]
async fn main() {
    let body = OnDemandConcurrencyCapAttributes::new().on_demand_concurrency_cap(20.0 as f64);
    let configuration = datadog::Configuration::new();
    let api = SyntheticsAPI::with_config(configuration);
    let resp = api.set_on_demand_concurrency_cap(body).await;
    if let Ok(value) = resp {
        println!("{:#?}", value);
    } else {
        println!("{:#?}", resp.unwrap_err());
    }
}
```

#### Instructions

First [install the library and its dependencies](https://docs.datadoghq.com/api/latest.md?code-lang=rust) and then save the example to `src/main.rs` and run following commands:
    DD_SITE="datadoghq.com" DD_API_KEY="<API-KEY>" DD_APP_KEY="<APP-KEY>" cargo run
##### 

```typescript
/**
 * Save new value for on-demand concurrency cap returns "OK" response
 */

import { client, v2 } from "@datadog/datadog-api-client";

const configuration = client.createConfiguration();
const apiInstance = new v2.SyntheticsApi(configuration);

const params: v2.SyntheticsApiSetOnDemandConcurrencyCapRequest = {
  body: {
    onDemandConcurrencyCap: 20,
  },
};

apiInstance
  .setOnDemandConcurrencyCap(params)
  .then((data: v2.OnDemandConcurrencyCapResponse) => {
    console.log(
      "API called successfully. Returned data: " + JSON.stringify(data)
    );
  })
  .catch((error: any) => console.error(error));
```

#### Instructions

First [install the library and its dependencies](https://docs.datadoghq.com/api/latest.md?code-lang=typescript) and then save the example to `example.ts` and run following commands:
    DD_SITE="datadoghq.com" DD_API_KEY="<API-KEY>" DD_APP_KEY="<APP-KEY>" tsc "example.ts"
{% /tab %}