Creating An Application Without Instance URL
Navigate to URL
Open your browser and visit: https://<your-tenant>.apisecapps.com
Start Adding a New Application
Click on the "Add Application" button.

Select OpenAPI Spec
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Choose the "OpenAPI Spec" option.

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Click "Next" to proceed.

Enter Application Details
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Fill the form, App Name

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Click on the "Click To Upload Spec" option to upload the document.

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Select the "OpenAPI Spec" document from the file explorer.

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Click on the "Continue" button

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Click on the "Onboard" button

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Wait until the application is created.

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Now we have created an application with unreachable base URL.