Which authorization framework provides limited third-party access to HTTP services?

OAuth 2.0 is an authorization framework that enables a third-party application to obtain limited access to an HTTP service, such as a user's resources, without exposing the user's credentials. It achieves this by issuing access tokens with specific scopes and durations. IPsec is a suite of protocols used for securing IP communications, not for third-party authorization to HTTP services. GRE (Generic Routing Encapsulation) is a tunneling protocol used to encapsulate a wide variety of network layer protocols inside virtual point-to-point links over an IP network. Basic Auth is a simple authentication scheme where credentials (username and password) are sent in plain text (or base64 encoded) with each request, providing direct access rather than limited third-party authorization.