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1. Log in to the API Publisher.
2. Select the option to design a new API and click Start Creating.
    

3. Give the information in the table below. To add resources, click the Add button.
   

   Field		Sample value
   Name		WeatherLocation_API
   Context		/weatherlocation
   Version		1.0.0
   Resources	URL pattern	{town}
   	Request types	GET

   

4. After the resource is added, expand its GET method , add the following parameterand note that a parameter by the name town is added under the resource. You use it to pass additional information the payload to the backend. Once done, click Implement.
   

   Parameter Name	Description	Parameter Type	Data Type	Required
   town	Give the town name here	Query	String	True

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5. In the Prototype sections under the Implement tab, click the implementation method as Inline.
    

6. Expand the GET method and give the following as the script. It reads the payload that the user sends with the API request , converts it to JSON and returns the same value in the resultand returns it as a JSON value.

   Code Block
   mc.setProperty('CONTENT_TYPE', 'application/json'); var town = mc.getProperty('uri.var.town'); mc.setPayloadJSON('{ "Town" : "'+town+'"}');

   

7. Click the Deploy as a Prototype button.

8. Go to the API Store, click the Prototyped APIs menu and note that the newly deployed API is listed there.
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   Tip
   Tip: You can invoke prototyped APIs without signing in to the API Store or subscribing to the API. The purpose of a prototype is advertising and giving an early implementation for users to test.

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9. Click the API to open it and go to its API Console tab.
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10. Expand the GET method, give any value for the town (say London) and invoke the API.
     

11. Note the payload you gave as a JSON output in the response.
     

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