diff --git a/apps/emqx_bridge/test/emqx_bridge_v2_tests.erl b/apps/emqx_bridge/test/emqx_bridge_v2_tests.erl
index d85830828..9fe2d2e76 100644
--- a/apps/emqx_bridge/test/emqx_bridge_v2_tests.erl
+++ b/apps/emqx_bridge/test/emqx_bridge_v2_tests.erl
@@ -25,8 +25,8 @@
 non_deprecated_fields(Fields) ->
     [K || {K, Schema} <- Fields, not hocon_schema:is_deprecated(Schema)].
 
-find_resource_opts_fields(SchemaMod, FieldName) ->
-    Fields = hocon_schema:fields(SchemaMod, FieldName),
+find_resource_opts_fields(SchemaMod, StructName) ->
+    Fields = hocon_schema:fields(SchemaMod, StructName),
     case lists:keyfind(resource_opts, 1, Fields) of
         false ->
             undefined;
@@ -35,8 +35,8 @@ find_resource_opts_fields(SchemaMod, FieldName) ->
     end.
 
 get_resource_opts_subfields(Sc) ->
-    ?R_REF(SchemaModRO, FieldNameRO) = hocon_schema:field_schema(Sc, type),
-    ROFields = non_deprecated_fields(hocon_schema:fields(SchemaModRO, FieldNameRO)),
+    ?R_REF(SchemaModRO, StructNameRO) = hocon_schema:field_schema(Sc, type),
+    ROFields = non_deprecated_fields(hocon_schema:fields(SchemaModRO, StructNameRO)),
     proplists:get_keys(ROFields).
 
 %%------------------------------------------------------------------------------
@@ -107,3 +107,33 @@ connector_resource_opts_test() ->
         }
     ),
     ok.
+
+actions_api_spec_post_fields_test() ->
+    ?UNION(Union) = emqx_bridge_v2_schema:post_request(),
+    Schemas =
+        lists:map(
+            fun(?R_REF(SchemaMod, StructName)) ->
+                {SchemaMod, hocon_schema:fields(SchemaMod, StructName)}
+            end,
+            hoconsc:union_members(Union)
+        ),
+    MinimalFields0 =
+        [
+            binary_to_atom(F)
+         || F <- emqx_bridge_v2_schema:top_level_common_action_keys(),
+            F =/= <<"local_topic">>
+        ],
+    MinimalFields = [type, name | MinimalFields0],
+    MissingFields =
+        lists:filtermap(
+            fun({SchemaMod, FieldSchemas}) ->
+                Missing = MinimalFields -- proplists:get_keys(FieldSchemas),
+                case Missing of
+                    [] -> false;
+                    _ -> {true, {SchemaMod, Missing}}
+                end
+            end,
+            Schemas
+        ),
+    ?assertEqual(#{}, maps:from_list(MissingFields)),
+    ok.
diff --git a/apps/emqx_bridge_matrix/src/emqx_bridge_matrix.erl b/apps/emqx_bridge_matrix/src/emqx_bridge_matrix.erl
index 4f7a1a370..205edef56 100644
--- a/apps/emqx_bridge_matrix/src/emqx_bridge_matrix.erl
+++ b/apps/emqx_bridge_matrix/src/emqx_bridge_matrix.erl
@@ -23,6 +23,7 @@
 ]).
 
 -define(CONNECTOR_TYPE, matrix).
+-define(ACTION_TYPE, matrix).
 
 %% -------------------------------------------------------------------------------------------------
 %% api
@@ -44,7 +45,7 @@ namespace() -> "bridge_matrix".
 roots() -> [].
 
 fields("post") ->
-    emqx_bridge_pgsql:fields("post", matrix);
+    emqx_bridge_pgsql:fields("post", ?ACTION_TYPE, "config");
 fields("config_connector") ->
     emqx_bridge_pgsql:fields("config_connector");
 fields(action) ->
@@ -61,7 +62,7 @@ fields("put_bridge_v2") ->
 fields("get_bridge_v2") ->
     emqx_bridge_pgsql:fields(pgsql_action);
 fields("post_bridge_v2") ->
-    emqx_bridge_pgsql:fields(pgsql_action);
+    emqx_bridge_pgsql:fields("post", ?ACTION_TYPE, pgsql_action);
 fields(Field) when
     Field == "get_connector";
     Field == "put_connector";
diff --git a/apps/emqx_bridge_pgsql/src/emqx_bridge_pgsql.erl b/apps/emqx_bridge_pgsql/src/emqx_bridge_pgsql.erl
index 4c0efe269..50c322941 100644
--- a/apps/emqx_bridge_pgsql/src/emqx_bridge_pgsql.erl
+++ b/apps/emqx_bridge_pgsql/src/emqx_bridge_pgsql.erl
@@ -13,13 +13,15 @@
 -include_lib("snabbkaffe/include/snabbkaffe.hrl").
 -include_lib("emqx_resource/include/emqx_resource.hrl").
 
+%% `hocon_schema' API
 -export([
     namespace/0,
     roots/0,
     fields/1,
-    desc/1,
-    fields/2
+    desc/1
 ]).
+%% for sharing with other actions
+-export([fields/3]).
 
 %% Examples
 -export([
@@ -33,9 +35,7 @@
     values_conn_bridge_examples/2
 ]).
 
--define(PGSQL_HOST_OPTIONS, #{
-    default_port => ?PGSQL_DEFAULT_PORT
-}).
+-define(ACTION_TYPE, pgsql).
 
 %% Hocon Schema Definitions
 namespace() -> "bridge_pgsql".
@@ -81,7 +81,7 @@ fields("put_bridge_v2") ->
 fields("get_bridge_v2") ->
     fields(pgsql_action);
 fields("post_bridge_v2") ->
-    fields(pgsql_action);
+    fields("post", pgsql, pgsql_action);
 fields("config") ->
     [
         {enable, hoconsc:mk(boolean(), #{desc => ?DESC("config_enable"), default => true})},
@@ -99,14 +99,14 @@ fields("config") ->
         (emqx_postgresql:fields(config) --
             emqx_connector_schema_lib:prepare_statement_fields());
 fields("post") ->
-    fields("post", pgsql);
+    fields("post", ?ACTION_TYPE, "config");
 fields("put") ->
     fields("config");
 fields("get") ->
     emqx_bridge_schema:status_fields() ++ fields("post").
 
-fields("post", Type) ->
-    [type_field(Type), name_field() | fields("config")].
+fields("post", Type, StructName) ->
+    [type_field(Type), name_field() | fields(StructName)].
 
 type_field(Type) ->
     {type, hoconsc:mk(hoconsc:enum([Type]), #{required => true, desc => ?DESC("desc_type")})}.
diff --git a/apps/emqx_bridge_timescale/src/emqx_bridge_timescale.erl b/apps/emqx_bridge_timescale/src/emqx_bridge_timescale.erl
index 5d6c5498d..0d1d80879 100644
--- a/apps/emqx_bridge_timescale/src/emqx_bridge_timescale.erl
+++ b/apps/emqx_bridge_timescale/src/emqx_bridge_timescale.erl
@@ -23,6 +23,7 @@
 ]).
 
 -define(CONNECTOR_TYPE, timescale).
+-define(ACTION_TYPE, timescale).
 
 %% -------------------------------------------------------------------------------------------------
 %% api
@@ -44,7 +45,7 @@ namespace() -> "bridge_timescale".
 roots() -> [].
 
 fields("post") ->
-    emqx_bridge_pgsql:fields("post", timescale);
+    emqx_bridge_pgsql:fields("post", ?ACTION_TYPE, "config");
 fields("config_connector") ->
     emqx_postgresql_connector_schema:fields("config_connector");
 fields(action) ->
@@ -61,7 +62,7 @@ fields("put_bridge_v2") ->
 fields("get_bridge_v2") ->
     emqx_bridge_pgsql:fields(pgsql_action);
 fields("post_bridge_v2") ->
-    emqx_bridge_pgsql:fields(pgsql_action);
+    emqx_bridge_pgsql:fields("post", ?ACTION_TYPE, pgsql_action);
 fields(Field) when
     Field == "get_connector";
     Field == "put_connector";