diff --git a/fed/api.py b/fed/api.py
index d89cc71..6b020eb 100644
--- a/fed/api.py
+++ b/fed/api.py
@@ -92,6 +92,33 @@ def init(
                     'carol': '127.0.0.1:10003',
                 }
         party: optional; self party.
+        config: optional; a dict describes general job configurations. Currently the
+            supported configurations are [`cross_silo_comm`, 'barrier_on_initializing'].
+            * `cross_silo_comm`: optional; a dict describes the cross-silo common
+                configs, the supported configs can be referred to
+                `fed.config.CrossSiloMessageConfig` and
+                `fed.config.GrpcCrossSiloMessageConfig`. Note that, the
+                `cross_silo_comm.messages_max_size_in_bytes` will be overrided
+                if `cross_silo_comm.grpc_channel_options` is provided and contains
+                `grpc.max_send_message_length` or `grpc.max_receive_message_length`.
+            * `barrier_on_initializing`: optional; a bool value indicates whether to
+                wait for all parties to be ready before starting the job. If set
+                to True, the job will be started after all parties are ready,
+                otherwise, the job will be started immediately after the current
+                party is ready.
+
+            Example:
+
+            .. code:: python
+                {
+                    "cross_silo_comm": {
+                        "messages_max_size_in_bytes": 500*1024,
+                        "timeout_in_ms": 1000,
+                        "exit_on_sending_failure": True,
+                        "expose_error_trace": True,
+                    },
+                    "barrier_on_initializing": True,
+                }
         tls_config: optional; a dict describes the tls config. E.g.
             For alice,
 
diff --git a/fed/config.py b/fed/config.py
index a4d1a23..386984c 100644
--- a/fed/config.py
+++ b/fed/config.py
@@ -95,8 +95,7 @@ class CrossSiloMessageConfig:
             cross-silo sending. If True, a SIGTERM will be signaled to self
             if failed to sending cross-silo data.
         messages_max_size_in_bytes: The maximum length in bytes of
-            cross-silo messages.
-            If None, the default value of 500 MB is specified.
+            cross-silo messages. If None, the default value of 500 MB is specified.
         timeout_in_ms: The timeout in mili-seconds of a cross-silo RPC call.
             It's 60000 by default.
         http_header: The HTTP header, e.g. metadata in grpc, sent with the RPC request.
diff --git a/fed/proxy/grpc/grpc_proxy.py b/fed/proxy/grpc/grpc_proxy.py
index f1dfc71..85b7256 100644
--- a/fed/proxy/grpc/grpc_proxy.py
+++ b/fed/proxy/grpc/grpc_proxy.py
@@ -60,8 +60,21 @@ def parse_grpc_options(proxy_config: CrossSiloMessageConfig):
         dict: A dictionary containing the gRPC channel options.
     """
     grpc_channel_options = {}
-    if proxy_config is not None and isinstance(
-            proxy_config, GrpcCrossSiloMessageConfig):
+    if proxy_config is not None:
+        # NOTE(NKcqx): `messages_max_size_in_bytes` is a common cross-silo
+        # config that should be extracted and filled into proper grpc's
+        # channel options.
+        # However, `GrpcCrossSiloMessageConfig` provides a more flexible way
+        # to configure grpc channel options, i.e. the `grpc_channel_options`
+        # field, which may override the `messages_max_size_in_bytes` field.
+        if (isinstance(proxy_config, CrossSiloMessageConfig)):
+            if (proxy_config.messages_max_size_in_bytes is not None):
+                grpc_channel_options.update({
+                    'grpc.max_send_message_length':
+                        proxy_config.messages_max_size_in_bytes,
+                    'grpc.max_receive_message_length':
+                        proxy_config.messages_max_size_in_bytes,
+                })
         if isinstance(proxy_config, GrpcCrossSiloMessageConfig):
             if proxy_config.grpc_channel_options is not None:
                 grpc_channel_options.update(proxy_config.grpc_channel_options)
diff --git a/fed/tests/test_grpc_options_on_proxies.py b/fed/tests/test_grpc_options_on_proxies.py
index 6a09c75..cb14e92 100644
--- a/fed/tests/test_grpc_options_on_proxies.py
+++ b/fed/tests/test_grpc_options_on_proxies.py
@@ -61,7 +61,7 @@ def _assert_on_proxy(proxy_actor):
     ray.shutdown()
 
 
-def test_grpc_max_size():
+def test_grpc_max_size_by_channel_options():
     p_alice = multiprocessing.Process(target=run, args=('alice',))
     p_bob = multiprocessing.Process(target=run, args=('bob',))
     p_alice.start()
@@ -71,6 +71,101 @@ def test_grpc_max_size():
     assert p_alice.exitcode == 0 and p_bob.exitcode == 0
 
 
+def run2(party):
+    compatible_utils.init_ray(address='local')
+    addresses = {
+        'alice': '127.0.0.1:11019',
+        'bob': '127.0.0.1:11018',
+    }
+    fed.init(
+        addresses=addresses,
+        party=party,
+        config={
+            "cross_silo_comm": {
+                "messages_max_size_in_bytes": 100,
+            },
+        },
+    )
+
+    def _assert_on_proxy(proxy_actor):
+        config = ray.get(proxy_actor._get_proxy_config.remote())
+        options = config['grpc_options']
+        assert ("grpc.max_send_message_length", 100) in options
+        assert ("grpc.max_receive_message_length", 100) in options
+        assert ('grpc.so_reuseport', 0) in options
+
+    sender_proxy = ray.get_actor(sender_proxy_actor_name())
+    receiver_proxy = ray.get_actor(receiver_proxy_actor_name())
+    _assert_on_proxy(sender_proxy)
+    _assert_on_proxy(receiver_proxy)
+
+    a = dummpy.party('alice').remote()
+    b = dummpy.party('bob').remote()
+    fed.get([a, b])
+
+    fed.shutdown()
+    ray.shutdown()
+
+
+def test_grpc_max_size_by_common_config():
+    p_alice = multiprocessing.Process(target=run2, args=('alice',))
+    p_bob = multiprocessing.Process(target=run2, args=('bob',))
+    p_alice.start()
+    p_bob.start()
+    p_alice.join()
+    p_bob.join()
+    assert p_alice.exitcode == 0 and p_bob.exitcode == 0
+
+
+def run3(party):
+    compatible_utils.init_ray(address='local')
+    addresses = {
+        'alice': '127.0.0.1:11019',
+        'bob': '127.0.0.1:11018',
+    }
+    fed.init(
+        addresses=addresses,
+        party=party,
+        config={
+            "cross_silo_comm": {
+                "messages_max_size_in_bytes": 100,
+                "grpc_channel_options": [
+                    ('grpc.max_send_message_length', 200),
+                    ],
+            },
+        },
+    )
+
+    def _assert_on_proxy(proxy_actor):
+        config = ray.get(proxy_actor._get_proxy_config.remote())
+        options = config['grpc_options']
+        assert ("grpc.max_send_message_length", 200) in options
+        assert ("grpc.max_receive_message_length", 100) in options
+        assert ('grpc.so_reuseport', 0) in options
+
+    sender_proxy = ray.get_actor(sender_proxy_actor_name())
+    receiver_proxy = ray.get_actor(receiver_proxy_actor_name())
+    _assert_on_proxy(sender_proxy)
+    _assert_on_proxy(receiver_proxy)
+
+    a = dummpy.party('alice').remote()
+    b = dummpy.party('bob').remote()
+    fed.get([a, b])
+
+    fed.shutdown()
+    ray.shutdown()
+
+
+def test_grpc_max_size_by_both_config():
+    p_alice = multiprocessing.Process(target=run3, args=('alice',))
+    p_bob = multiprocessing.Process(target=run3, args=('bob',))
+    p_alice.start()
+    p_bob.start()
+    p_alice.join()
+    p_bob.join()
+    assert p_alice.exitcode == 0 and p_bob.exitcode == 0
+
+
 if __name__ == "__main__":
     import sys