OAuth 2.0 Client Credentials Flow
You can use the client credentials flow with OAuth 2.0. The client credentials flow is machine-to-machine and does not require any user interaction. Administrators and users with the OAuth 2.0 Authorized Applications Management permission can set up the flow, upload and revoke certificates for applications on the OAuth 2.0 Client Credentials (M2M) Setup page.
The OAuth 2.0 client credentials flow consists of a POST request to the token endpoint and a system response containing an access token.
For more information, see POST Request to the Token Endpoint and the Access Token Response.