> ## Documentation Index
> Fetch the complete documentation index at: https://docs.apinizer.com/llms.txt
> Use this file to discover all available pages before exploring further.
# Business Rule Application Based on Variable Content Using Custom Variable Map
In this scenario, a Mock API will be created on Apinizer. In the request to be made, the value **stop=true** will be added to the **customVariableMap** variable using script.
In the next stage, a **Business Rule** policy will be added and the value in **customVariableMap** will be checked. If this value is **stop=true**, **the request will be prevented from going to the backend**
Let's add policies through Add policy.
We add **Script** and **Business Rule** as policies.
In the **Script** policy, by selecting the **Groovy** language, stop=true will be assigned to the customVariableMap value.
Let's select the **stop** action we determined in the Business Rule policy.
Select **"'Custom Variable'"** from the **Conditions** field, write **stop** in the name field, and save.
With the rule you added below, if the value in **customVariableMap** is **"'true'"**, the request will not be forwarded to the backend.
When the test is performed from the console below, a response message indicating that the request was stopped is returned.
