diff --git a/apps/emqx_gateway/src/emqx_gateway_api.erl b/apps/emqx_gateway/src/emqx_gateway_api.erl
new file mode 100644
index 000000000..0aca3c8f3
--- /dev/null
+++ b/apps/emqx_gateway/src/emqx_gateway_api.erl
@@ -0,0 +1,389 @@
+%%--------------------------------------------------------------------
+%% Copyright (c) 2021 EMQ Technologies Co., Ltd. All Rights Reserved.
+%%
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License.
+%% You may obtain a copy of the License at
+%%
+%%     http://www.apache.org/licenses/LICENSE-2.0
+%%
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
+%%--------------------------------------------------------------------
+%%
+-module(emqx_gateway_api).
+
+-behaviour(minirest_api).
+
+-compile(nowarn_unused_function).
+
+%% minirest behaviour callbacks
+-export([api_spec/0]).
+
+%% http handlers
+-export([ gateway/2
+        , gateway_insta/2
+        ]).
+
+-define(EXAMPLE_GATEWAY_LIST,
+        [ #{ name => <<"lwm2m">>
+           , status => <<"running">>
+           , started_at => <<"2021-08-19T11:45:56.006373+08:00">>
+           , max_connection => 1024000
+           , current_connection => 12
+           , listeners => [
+                #{name => <<"lw-udp-1">>, status => <<"activing">>},
+                #{name => <<"lw-udp-2">>, status => <<"inactived">>}
+             ]
+           }
+        ]).
+
+-define(EXAMPLE_STOMP_GATEWAY_CONF, #{
+            frame => #{
+                max_headers => 10,
+                max_headers_length => 1024,
+                max_body_length => 8192
+            },
+            listener => #{
+                tcp => #{<<"default-stomp-listener">> => #{
+                            bind => <<"61613">>
+                       }}
+            }
+        }).
+
+-define(EXAMPLE_MQTTSN_GATEWAY_CONF, #{
+        }).
+
+-define(EXAMPLE_GATEWAY_STATS, #{
+            max_connection => 10240000,
+            current_connection => 1000,
+            messages_in => 100.24,
+            messages_out => 32.5
+        }).
+
+%%--------------------------------------------------------------------
+%% minirest behaviour callbacks
+%%--------------------------------------------------------------------
+
+api_spec() ->
+    {apis(), schemas()}.
+
+apis() ->
+    [ {"/gateway", metadata(gateway), gateway}  
+    , {"/gateway/:name", metadata(gateway_insta), gateway_insta}
+    , {"/gateway/:name/stats", metadata(gateway_insta_stats), gateway_insta_stats}
+    ].
+
+metadata(gateway) ->
+    #{get => #{
+        description => <<"Get gateway list">>,
+        parameters => [
+            #{name => status,
+              in => query,
+              schema => #{type => string},
+              required => false
+             }
+        ],
+        responses => #{
+            <<"200">> => #{
+                description => <<"OK">>,
+                content => #{
+                    'application/json' => #{
+                        schema => minirest:ref(<<"gateway_overrview">>),
+                        examples => #{
+                            simple => #{
+                                summary => <<"Gateway List Example">>,
+                                value => emqx_json:encode(?EXAMPLE_GATEWAY_LIST)
+                            }
+                        }
+                    }
+                }         
+            }
+        }
+     }};
+
+metadata(gateway_insta) ->
+    UriNameParamDef = #{name => name,
+                        in => path,
+                        schema => #{type => string},
+                        required => true
+                       },
+    NameNotFoundRespDef =
+        #{description => <<"Not Found">>,
+          content => #{
+            'application/json' => #{
+                schema => minirest:ref(<<"error">>),
+                examples => #{
+                    simple => #{
+                        summary => <<"Not Found">>,
+                        value => #{
+                            code => <<"NOT_FOUND">>,
+                            message => <<"gateway xxx not found">>
+                        }
+                    }
+                }
+            }
+         }},
+    #{delete => #{
+        description => <<"Delete/Unload the gateway">>,
+        parameters => [UriNameParamDef],
+        responses => #{
+            <<"404">> => NameNotFoundRespDef,
+            <<"204">> => #{description => <<"No Content">>}
+        }
+      },
+      get => #{
+        description => <<"Get the gateway configurations">>,
+        parameters => [UriNameParamDef],
+        responses => #{
+            <<"404">> => NameNotFoundRespDef,
+            <<"200">> => #{
+                description => <<"OK">>,
+                content => #{
+                    'application/json' => #{
+                        schema => minirest:ref(<<"gateway_conf">>),
+                        examples => #{
+                            simple1 => #{
+                                summary => <<"Stomp Gateway">>,
+                                value => emqx_json:encode(?EXAMPLE_STOMP_GATEWAY_CONF)
+                            },
+                            simple2 => #{
+                                summary => <<"MQTT-SN Gateway">>,
+                                value => emqx_json:encode(?EXAMPLE_MQTTSN_GATEWAY_CONF)
+                            }
+                        }
+                    }
+                }
+            }
+        }
+      },
+      put => #{
+        description => <<"Update the gateway configurations/status">>,
+        parameters => [UriNameParamDef],
+        requestBody => #{
+            content => #{
+                'application/json' => #{
+                    schema => minirest:ref(<<"gateway_conf">>),
+                    examples => #{
+                        simple1 => #{
+                            summary => <<"Stom Gateway">>,
+                            value => emqx_json:encode(?EXAMPLE_STOMP_GATEWAY_CONF)
+                        },
+                        simple2 => #{
+                            summary => <<"MQTT-SN Gateway">>,
+                            value => emqx_json:encode(?EXAMPLE_MQTTSN_GATEWAY_CONF)
+                        }
+                    }
+                }
+            }
+        },
+        responses => #{
+            <<"404">> => NameNotFoundRespDef,
+            <<"204">> => #{description => <<"Created">>}
+        }
+      }
+     };
+
+metadata(gateway_insta_stats) ->
+    #{get => #{
+        description => <<"Get gateway Statistic">>,
+        responses => #{
+            <<"200">> => #{
+                description => <<"OK">>,
+                content => #{
+                    'application/json' => #{
+                        schema => minirest:ref(<<"gateway_stats">>),
+                        examples => #{
+                            simple => #{
+                                summary => <<"Gateway Statistic">>,
+                                value => emqx_json:encode(?EXAMPLE_GATEWAY_STATS)
+                            }
+                        }
+                    }
+                }         
+            }
+        }
+     }}.
+
+schemas() ->
+    [ #{<<"gateway_overrview">> => schema_for_gateway_overrview()}
+    , #{<<"gateway_conf">> => schema_for_gateway_conf()}
+    , #{<<"gateway_stats">> => schema_for_gateway_stats()}
+    ].
+
+schema_for_gateway_overrview() ->
+    #{type => array,
+      items => #{
+        type => object,
+        properties => #{
+            name => #{
+                type => string,
+                example => <<"lwm2m">>
+            },
+            status => #{
+                type => string,
+                enum => [<<"running">>, <<"stopped">>, <<"unloaded">>],
+                example => <<"running">>
+            },
+            started_at => #{
+                type => string,
+                example => <<"2021-08-19T11:45:56.006373+08:00">>
+            },
+            max_connection => #{
+                type => integer,
+                example => 1024000
+            },
+            current_connection => #{
+                type => integer,
+                example => 1000
+            },
+            listeners => #{
+                type => array,
+                items => #{
+                    type => object,
+                    properties => #{
+                        name => #{
+                            type => string,
+                            example => <<"lw-udp">>
+                        },
+                        status => #{
+                            type => string,
+                            enum => [<<"activing">>, <<"inactived">>]
+                        }
+                    }
+                }
+            }
+        }
+      }
+     }.
+
+schema_for_gateway_conf() ->
+   #{oneOf =>
+     [ schema_for_gateway_conf_stomp()
+     , schema_for_gateway_conf_mqttsn()
+     , schema_for_gateway_conf_coap()
+     , schema_for_gateway_conf_lwm2m()
+     , schema_for_gateway_conf_exproto()
+     ]}.
+
+schema_for_clientinfo_override() ->
+    #{type => object,
+      properties => #{
+        clientid => #{type => string},
+        username => #{type => string},
+        password => #{type => string}
+     }}.
+
+schema_for_authenticator() ->
+    %% TODO.
+    #{type => object, properties => #{
+        a_key => #{type => string}
+     }}.
+
+schema_for_tcp_listener() ->
+    %% TODO.
+    #{type => object, properties => #{
+        a_key => #{type => string}
+     }}.
+
+schema_for_udp_listener() ->
+    %% TODO.
+    #{type => object, properties => #{
+        a_key => #{type => string}
+     }}.
+
+%% It should be generated by _schema.erl module
+%% and emqx_gateway.conf
+schema_for_gateway_conf_stomp() ->
+    #{type => object,
+      properties => #{
+        frame => #{
+            type => object,
+            properties => #{
+                max_headers => #{type => integer},
+                max_headers_length => #{type => integer},
+                max_body_length => #{type => integer}
+            }
+        },
+        clientinfo_override => schema_for_clientinfo_override(),
+        authenticator => schema_for_authenticator(),
+        listener => schema_for_tcp_listener()
+      }
+     }.
+
+schema_for_gateway_conf_mqttsn() ->
+    #{type => object,
+      properties => #{
+        gateway_id => #{type => integer},
+        broadcast => #{type => boolean},
+        enable_stats => #{type => boolean},
+        enable_qos3 => #{type => boolean},
+        idle_timeout => #{type => integer},
+        predefined => #{
+            type => array,
+            items => #{
+                type => object,
+                properties => #{
+                    id => #{type => integer},
+                    topic => #{type => string}
+                }
+            }
+        },
+        clientinfo_override => schema_for_clientinfo_override(),
+        authenticator => schema_for_authenticator(),
+        listener => schema_for_udp_listener()
+     }}.
+
+
+schema_for_gateway_conf_coap() ->
+    #{type => object,
+      properties => #{
+        clientinfo_override => schema_for_clientinfo_override(),
+        authenticator => schema_for_authenticator(),
+        listener => schema_for_udp_listener()
+     }}.
+
+schema_for_gateway_conf_lwm2m() ->
+    #{type => object,
+      properties => #{
+        clientinfo_override => schema_for_clientinfo_override(),
+        authenticator => schema_for_authenticator(),
+        listener => schema_for_udp_listener()
+     }}.
+
+schema_for_gateway_conf_exproto() ->
+    #{type => object,
+      properties => #{
+        clientinfo_override => schema_for_clientinfo_override(),
+        authenticator => schema_for_authenticator(),
+        listener => #{oneOf => [schema_for_tcp_listener(),
+                                schema_for_udp_listener()
+                               ]
+                     }
+     }}.
+
+schema_for_gateway_stats() ->
+    #{type => object,
+      properties => #{
+        a_key => #{type => string}
+     }}.
+
+%%--------------------------------------------------------------------
+%% http handlers
+
+gateway(get, _Request) ->
+    {200, ok}.
+
+gateway_insta(delete, _Request) ->
+    {200, ok};
+gateway_insta(get, _Request) ->
+    {200, ok};
+gateway_insta(put, _Request) ->
+    {200, ok}.
+
+gateway_insta_stats(get, _Req) ->
+    {401, <<"Implement it later (maybe 5.1)">>}.
+
diff --git a/apps/emqx_gateway/src/emqx_gateway_api_authn.erl b/apps/emqx_gateway/src/emqx_gateway_api_authn.erl
new file mode 100644
index 000000000..85eb4ddc7
--- /dev/null
+++ b/apps/emqx_gateway/src/emqx_gateway_api_authn.erl
@@ -0,0 +1,25 @@
+%%--------------------------------------------------------------------
+%% Copyright (c) 2021 EMQ Technologies Co., Ltd. All Rights Reserved.
+%%
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License.
+%% You may obtain a copy of the License at
+%%
+%%     http://www.apache.org/licenses/LICENSE-2.0
+%%
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
+%%--------------------------------------------------------------------
+%%
+-module(emqx_gateway_api_authn).
+
+-behaviour(minirest_api).
+
+%% minirest behaviour callbacks
+-export([api_spec/0]).
+
+api_spec() ->
+    {[], []}.
diff --git a/apps/emqx_gateway/src/emqx_gateway_api_client.erl b/apps/emqx_gateway/src/emqx_gateway_api_client.erl
new file mode 100644
index 000000000..03fb056ad
--- /dev/null
+++ b/apps/emqx_gateway/src/emqx_gateway_api_client.erl
@@ -0,0 +1,25 @@
+%%--------------------------------------------------------------------
+%% Copyright (c) 2021 EMQ Technologies Co., Ltd. All Rights Reserved.
+%%
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License.
+%% You may obtain a copy of the License at
+%%
+%%     http://www.apache.org/licenses/LICENSE-2.0
+%%
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
+%%--------------------------------------------------------------------
+%%
+-module(emqx_gateway_api_client).
+
+-behaviour(minirest_api).
+
+%% minirest behaviour callbacks
+-export([api_spec/0]).
+
+api_spec() ->
+    {[], []}.