Create and Publish an API

API creation is the process of linking an existing backend API implementation to the API Publisher so that you can manage and monitor the API's lifecycle, documentation, security, community, and subscriptions. Alternatively, you can provide the API implementation in-line in the API Publisher itself.

Let's get started. See the video tutorial here or a step-by-step walk-through of the video tutorial below.

Here's a step-by-step walk-though of the video tutorial:

1. If you have not registered to the API Cloud yet, go to https://cloud.wso2.com/ and sign up. 
2. Log in to the API Cloud and the API Publisher Web application will open automatically.
3. Close the interactive tutorial that starts automatically if you are a first-time user, and then click New API...
    
4.  Select the option to design a new API and click Start Creating .
   

5. Give the information in the table below and click Add to add the resource.

   Field	Sample value
   Name	PhoneVerification
   Context	/phoneverify Tip: You can define the API's version as a parameter of its context by adding the {version} into the context. For example, {version}/phoneverify. The API Manager assigns the actual version of the API to the {version} parameter internally. For example, https://gateway.api.cloud.wso2.com:8243/t/companyn/1.0.0/phoneverify. Note that the version appears before the context, allowing you to group your APIs based on to versions.
   Version	1.0.0
   Visibility	Public
   Resources	URL Pattern: CheckPhoneNumber Request Types: GET, POST

   

6. After you add the resource, click its GET method to expand it, add the following parameters. You use them to invoke the API using our integrated API Console, which is explained in later tutorials. Once done, click Implement.

   Parameter Name	Description	Parameter Type	Data Type	Required
   PhoneNumber	Give the phone number to be validated	Query	String	True
   LicenseKey	Give the license key as 0 for testing purpose	Query	String	True

   

   Alternatively, click Save to save all the changes made to the API. You can come back later to edit it further by selecting the API and clicking on Edit. For details about the states of the API see Manage the API Lifecycle.

7. Click the Managed API option.
   

8. The Implement tab opens. Enter the information in the table below.

   Field	Sample value
   Endpoint type	HTTP/REST Endpoint
   Production endpoint	This sample service has two operations as CheckPhoneNumber and CheckPhoneNumbers. Let's use CheckPhoneNumber here. http://ws.cdyne.com/phoneverify/phoneverify.asmx To verify the URL, click the Test button next to it.

   

9. Click Manage to go to the Manage tab and enter the information in the table below.

   Field	Sample value	Description
   Tier Availability	Select all	The API can be available at different levels of service. They allow you to limit the number of successful hits to an API during a given period of time.

   

10. Click Save & Publish. This will publish the API that you just created in the API Store so that subscribers can use it. You can save the API without publishing it. Select the API and click the Lifecycle tab to manage the API Lifecycle.
    

You have created an API.

For details on creating APIs using Swagger definitions, see Create APIs using a Swagger URL.