keystone/api-ref/source/v3-ext/federation/identity-provider/samples/list-protocol-response.json

{
    "links": {
        "next": null,
        "previous": null,
        "self": "http://example.com/identity/v3/OS-FEDERATION/identity_providers/ACME/protocols"
    },
    "protocols": [
        {
            "id": "saml2",
            "links": {
                "identity_provider": "http://example.com/identity/v3/OS-FEDERATION/identity_providers/ACME",
                "self": "http://example.com/identity/v3/OS-FEDERATION/identity_providers/ACME/protocols/saml2"
            },
            "mapping_id": "xyz234"
        }
    ]
}