This documentation is for WSO2 Identity Server 5.1.0 . View documentation for the latest release.
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Recommended use

This grant is suitable for machine-to-machine authentication or for a client making requests to an API that does not require the user’s permission. This grant should be allowed for use only by trusted clients.

The flow

The client can request an access token using only its client credentials with this grant type. It is similar to the resource owner password credentials grant type except in this case, only the client’s credentials are used to authenticate a request for an access token.

Support for refresh token grant - No

The cURL commands below can be used to try this grant type.

curl -v -X POST -H "Authorization: Basic <base64 encoded client id:client secret value>" -k -d "grant_type=client_credentials" -H "Content-Type:application/x-www-form-urlencoded" https://localhost:9443/oauth2/token
 curl -u <client id>:<client secret> -k -d "grant_type=client_credentials" -H "Content-Type:application/x-www-form-urlencoded" https://localhost:9443/oauth2/token

You will receive a response similiar to the format below. 

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