(PowerShell) Okta Client Credentials FLow

The Client Credentials flow is recommended for use in machine-to-machine authentication. Your application will need to securely store its Client ID and Secret and pass those to Okta in exchange for an access token. At a high-level, the flow only has two steps:

• Your application passes its client credentials to your Okta authorization server.
• If the credentials are accurate, Okta responds with an access token.

Note: This example uses "customScope". You'll replace it with whatever scope(s) you've defined for your app. Scopes are defined in your Authorization Server. See Okta Authorization Server / Scopes

For more information, see https://developer.okta.com/docs/guides/implement-client-creds/use-flow/

Chilkat .NET Downloads Chilkat .NET Assemblies

Add-Type -Path "C:\chilkat\ChilkatDotNet47-9.5.0-x64\ChilkatDotNet47.dll"

# This example assumes the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

$http = New-Object Chilkat.Http

# Implements the following CURL command:

# curl --request POST \
#   --url https://{yourOktaDomain}/oauth2/default/v1/token \
#   --header 'accept: application/json' \
#   --user "client_id:client_secret" \
#   --header 'cache-control: no-cache' \
#   --header 'content-type: application/x-www-form-urlencoded' \
#   --data 'grant_type=client_credentials&scope=customScope'

$http.Login = "client_id"
$http.Password = "client_secret"

$req = New-Object Chilkat.HttpRequest
$req.HttpVerb = "POST"
$req.Path = "/oauth2/default/v1/token"
$req.ContentType = "application/x-www-form-urlencoded"
$req.AddParam("grant_type","client_credentials")
$req.AddParam("scope","customScope")

$req.AddHeader("accept","application/json")

$resp = $http.PostUrlEncoded("https://{yourOktaDomain}/oauth2/default/v1/token",$req)
if ($http.LastMethodSuccess -eq $false) {
    $($http.LastErrorText)
    exit
}

$sbResponseBody = New-Object Chilkat.StringBuilder
$resp.GetBodySb($sbResponseBody)
$jResp = New-Object Chilkat.JsonObject
$jResp.LoadSb($sbResponseBody)
$jResp.EmitCompact = $false

$("Response Body:")
$($jResp.Emit())

$respStatusCode = $resp.StatusCode
$("Response Status Code = " + $respStatusCode)
if ($respStatusCode -ge 400) {
    $("Response Header:")
    $($resp.Header)
    $("Failed.")

    exit
}

# Sample JSON response:
# (Sample code for parsing the JSON response is shown below)

# {
#   "access_token": "eyJraWQiO ... B2CnCLj7GRUW3mQ",
#   "token_type": "Bearer",
#   "expires_in": 3600,
#   "scope": "customScope"
# }

# Sample code for parsing the JSON response...
# Use the following online tool to generate parsing code from sample JSON:
# Generate Parsing Code from JSON

$access_token = $jResp.StringOf("access_token")
$token_type = $jResp.StringOf("token_type")
$expires_in = $jResp.IntOf("expires_in")
$scope = $jResp.StringOf("scope")