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Universal provides the ability to define REST API endpoints using PowerShell. When the endpoints are executed by a compatible HTTP client, the PowerShell script will execute and return the result to the end user.
This feature is for developing custom APIs run by Universal. It not required for managing Universal. Universal provides a set of management APIs that are included with the platform.
Execution Environment
The REST API execution environment runs in your default PowerShell version. Unlike Automation jobs, which can also be run via the Universal management API, APIs that you define are run in a single PowerShell process. Because the PowerShell process is not started and stopped for each call to the endpoint, the API is much faster.
You can define the environment that runs the PowerShell Universal API process by specifying the
-ApiEnvironment on Set-PSUSetting. Changing this setting will cause the API process to restart.1
Set-PSUSetting -ApiEnvironment '7.1'
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Performance
Performance is relative to the hardware and network conditions that you are running Universal on. That said, in ideal conditions you can expect the Universal APIs to service about 500 requests per second. This is with an entirely empty endpoint so any script that you add to that endpoint will reduce the throughput. The reduction of throughput will depend on the cmdlets and script executed within the API endpoint.
Variables
There are a set of predefined variables that are available in API endpoints. You'll be able to use these variables in your scripts.
Variable
Description
Type
$Url
URL the client used to call the endpoint
String
$Headers
Headers provided by the client to call the endpoint
Hashtable
$Body
The UTF8 encoded string of the content of the request
String
$Data
Binary byte array for the content of the request
Byte[]
$RemoteIpAddress
The remote IP address used to make the request.
String
$LocalIpAddress
The local IP address used to service the request.
String
$RemotePort
The remote port that was called to make the request.
Integer
$LocalPort
The local port that was used to service the request.
Integer
$Identity
The identity name of the principal accessing the API.
String
Related Cmdlets
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