diff --git a/api/OpenSearchApi.d.ts b/api/OpenSearchApi.d.ts
index ade3c01fb..42eb79c91 100644
--- a/api/OpenSearchApi.d.ts
+++ b/api/OpenSearchApi.d.ts
@@ -673,6 +673,24 @@ export default class OpenSearchAPI {
 
   };
 
+  list: {
+    help (params?: API.List_Help_Request, options?: TransportRequestOptions): TransportRequestPromise<API.List_Help_Response>;
+    help (callback: callbackFn<API.List_Help_Response>): TransportRequestCallback;
+    help (params: API.List_Help_Request, callback: callbackFn<API.List_Help_Response>): TransportRequestCallback;
+    help (params: API.List_Help_Request, options: TransportRequestOptions, callback: callbackFn<API.List_Help_Response>): TransportRequestCallback;
+
+    indices (params?: API.List_Indices_Request, options?: TransportRequestOptions): TransportRequestPromise<API.List_Indices_Response>;
+    indices (callback: callbackFn<API.List_Indices_Response>): TransportRequestCallback;
+    indices (params: API.List_Indices_Request, callback: callbackFn<API.List_Indices_Response>): TransportRequestCallback;
+    indices (params: API.List_Indices_Request, options: TransportRequestOptions, callback: callbackFn<API.List_Indices_Response>): TransportRequestCallback;
+
+    shards (params?: API.List_Shards_Request, options?: TransportRequestOptions): TransportRequestPromise<API.List_Shards_Response>;
+    shards (callback: callbackFn<API.List_Shards_Response>): TransportRequestCallback;
+    shards (params: API.List_Shards_Request, callback: callbackFn<API.List_Shards_Response>): TransportRequestCallback;
+    shards (params: API.List_Shards_Request, options: TransportRequestOptions, callback: callbackFn<API.List_Shards_Response>): TransportRequestCallback;
+
+  };
+
   ml: {
     registerAgents (params?: API.Ml_RegisterAgents_Request, options?: TransportRequestOptions): TransportRequestPromise<API.Ml_RegisterAgents_Response>;
     registerAgents (callback: callbackFn<API.Ml_RegisterAgents_Response>): TransportRequestCallback;
@@ -1326,19 +1344,23 @@ export default class OpenSearchAPI {
   };
 
   sql: {
-    settings (params: API.Sql_Settings_Request, options?: TransportRequestOptions): TransportRequestPromise<API.Sql_Settings_Response>;
+    settings (params?: API.Sql_Settings_Request, options?: TransportRequestOptions): TransportRequestPromise<API.Sql_Settings_Response>;
+    settings (callback: callbackFn<API.Sql_Settings_Response>): TransportRequestCallback;
     settings (params: API.Sql_Settings_Request, callback: callbackFn<API.Sql_Settings_Response>): TransportRequestCallback;
     settings (params: API.Sql_Settings_Request, options: TransportRequestOptions, callback: callbackFn<API.Sql_Settings_Response>): TransportRequestCallback;
 
-    query (params: API.Sql_Query_Request, options?: TransportRequestOptions): TransportRequestPromise<API.Sql_Query_Response>;
+    query (params?: API.Sql_Query_Request, options?: TransportRequestOptions): TransportRequestPromise<API.Sql_Query_Response>;
+    query (callback: callbackFn<API.Sql_Query_Response>): TransportRequestCallback;
     query (params: API.Sql_Query_Request, callback: callbackFn<API.Sql_Query_Response>): TransportRequestCallback;
     query (params: API.Sql_Query_Request, options: TransportRequestOptions, callback: callbackFn<API.Sql_Query_Response>): TransportRequestCallback;
 
-    explain (params: API.Sql_Explain_Request, options?: TransportRequestOptions): TransportRequestPromise<API.Sql_Explain_Response>;
+    explain (params?: API.Sql_Explain_Request, options?: TransportRequestOptions): TransportRequestPromise<API.Sql_Explain_Response>;
+    explain (callback: callbackFn<API.Sql_Explain_Response>): TransportRequestCallback;
     explain (params: API.Sql_Explain_Request, callback: callbackFn<API.Sql_Explain_Response>): TransportRequestCallback;
     explain (params: API.Sql_Explain_Request, options: TransportRequestOptions, callback: callbackFn<API.Sql_Explain_Response>): TransportRequestCallback;
 
-    close (params: API.Sql_Close_Request, options?: TransportRequestOptions): TransportRequestPromise<API.Sql_Close_Response>;
+    close (params?: API.Sql_Close_Request, options?: TransportRequestOptions): TransportRequestPromise<API.Sql_Close_Response>;
+    close (callback: callbackFn<API.Sql_Close_Response>): TransportRequestCallback;
     close (params: API.Sql_Close_Request, callback: callbackFn<API.Sql_Close_Response>): TransportRequestCallback;
     close (params: API.Sql_Close_Request, options: TransportRequestOptions, callback: callbackFn<API.Sql_Close_Response>): TransportRequestCallback;
 
@@ -1347,7 +1369,8 @@ export default class OpenSearchAPI {
     getStats (params: API.Sql_GetStats_Request, callback: callbackFn<API.Sql_GetStats_Response>): TransportRequestCallback;
     getStats (params: API.Sql_GetStats_Request, options: TransportRequestOptions, callback: callbackFn<API.Sql_GetStats_Response>): TransportRequestCallback;
 
-    postStats (params: API.Sql_PostStats_Request, options?: TransportRequestOptions): TransportRequestPromise<API.Sql_PostStats_Response>;
+    postStats (params?: API.Sql_PostStats_Request, options?: TransportRequestOptions): TransportRequestPromise<API.Sql_PostStats_Response>;
+    postStats (callback: callbackFn<API.Sql_PostStats_Response>): TransportRequestCallback;
     postStats (params: API.Sql_PostStats_Request, callback: callbackFn<API.Sql_PostStats_Response>): TransportRequestCallback;
     postStats (params: API.Sql_PostStats_Request, options: TransportRequestOptions, callback: callbackFn<API.Sql_PostStats_Response>): TransportRequestCallback;
 
diff --git a/api/OpenSearchApi.js b/api/OpenSearchApi.js
index 4ca4e5f7e..6eb8a2556 100644
--- a/api/OpenSearchApi.js
+++ b/api/OpenSearchApi.js
@@ -34,6 +34,7 @@ class OpenSearchAPI {
       insights: new(require('./insights/_api'))(this),
       ism: new(require('./ism/_api'))(this),
       knn: new(require('./knn/_api'))(this),
+      list: new(require('./list/_api'))(this),
       ml: new(require('./ml/_api'))(this),
       nodes: new(require('./nodes/_api'))(this),
       notifications: new(require('./notifications/_api'))(this),
@@ -161,6 +162,7 @@ class OpenSearchAPI {
       insights: { get() { return this[kApiModules].insights } },
       ism: { get() { return this[kApiModules].ism } },
       knn: { get() { return this[kApiModules].knn } },
+      list: { get() { return this[kApiModules].list } },
       ml: { get() { return this[kApiModules].ml } },
       nodes: { get() { return this[kApiModules].nodes } },
       notifications: { get() { return this[kApiModules].notifications } },
diff --git a/api/_types/_common.d.ts b/api/_types/_common.d.ts
index e9256d354..3dbaf6aab 100644
--- a/api/_types/_common.d.ts
+++ b/api/_types/_common.d.ts
@@ -204,6 +204,8 @@ export type FieldSizeUsage = {
 
 export type FieldValue = boolean | undefined | number | Record<string, any> | string
 
+export type FieldWithDirection = Record<string, SortOrder>
+
 export type FieldWithOrder = Record<string, ScoreSort>
 
 export type FlushStats = {
@@ -770,7 +772,7 @@ export type SlicesCalculation = 'auto'
 
 export type Sort = SortCombinations | SortCombinations[]
 
-export type SortCombinations = Field | FieldWithOrder | SortOptions
+export type SortCombinations = Field | FieldWithDirection | FieldWithOrder | SortOptions
 
 export type SortMode = 'avg' | 'max' | 'median' | 'min' | 'sum'
 
diff --git a/api/_types/_common.mapping.d.ts b/api/_types/_common.mapping.d.ts
index 832981f9c..3a32ec4c1 100644
--- a/api/_types/_common.mapping.d.ts
+++ b/api/_types/_common.mapping.d.ts
@@ -159,6 +159,12 @@ export type FieldNamesField = {
   enabled: boolean;
 }
 
+export type FlatObjectProperty = PropertyBase & {
+  aggregatable?: boolean;
+  searchable?: boolean;
+  type: 'flat_object';
+}
+
 export type FlattenedProperty = PropertyBase & {
   boost?: number;
   depth_limit?: number;
@@ -331,7 +337,7 @@ export type PercolatorProperty = PropertyBase & {
   type: 'percolator';
 }
 
-export type Property = BinaryProperty | BooleanProperty | JoinProperty | KeywordProperty | MatchOnlyTextProperty | PercolatorProperty | RankFeatureProperty | RankFeaturesProperty | SearchAsYouTypeProperty | TextProperty | VersionProperty | WildcardProperty | DateNanosProperty | DateProperty | AggregateMetricDoubleProperty | DenseVectorProperty | SparseVectorProperty | FlattenedProperty | NestedProperty | ObjectProperty | CompletionProperty | ConstantKeywordProperty | FieldAliasProperty | HistogramProperty | IpProperty | Murmur3HashProperty | TokenCountProperty | GeoPointProperty | GeoShapeProperty | XyPointProperty | XyShapeProperty | ByteNumberProperty | DoubleNumberProperty | FloatNumberProperty | HalfFloatNumberProperty | IntegerNumberProperty | LongNumberProperty | ScaledFloatNumberProperty | ShortNumberProperty | UnsignedLongNumberProperty | DateRangeProperty | DoubleRangeProperty | FloatRangeProperty | IntegerRangeProperty | IpRangeProperty | LongRangeProperty | KnnVectorProperty
+export type Property = BinaryProperty | BooleanProperty | JoinProperty | KeywordProperty | MatchOnlyTextProperty | PercolatorProperty | RankFeatureProperty | RankFeaturesProperty | SearchAsYouTypeProperty | TextProperty | VersionProperty | WildcardProperty | DateNanosProperty | DateProperty | AggregateMetricDoubleProperty | DenseVectorProperty | SparseVectorProperty | FlattenedProperty | FlatObjectProperty | NestedProperty | ObjectProperty | CompletionProperty | ConstantKeywordProperty | FieldAliasProperty | HistogramProperty | IpProperty | Murmur3HashProperty | TokenCountProperty | GeoPointProperty | GeoShapeProperty | XyPointProperty | XyShapeProperty | ByteNumberProperty | DoubleNumberProperty | FloatNumberProperty | HalfFloatNumberProperty | IntegerNumberProperty | LongNumberProperty | ScaledFloatNumberProperty | ShortNumberProperty | UnsignedLongNumberProperty | DateRangeProperty | DoubleRangeProperty | FloatRangeProperty | IntegerRangeProperty | IpRangeProperty | LongRangeProperty | KnnVectorProperty
 
 export type PropertyBase = {
   dynamic?: DynamicMapping;
diff --git a/api/_types/cluster.allocation_explain.d.ts b/api/_types/cluster.allocation_explain.d.ts
index 31555a22e..7d4d1c444 100644
--- a/api/_types/cluster.allocation_explain.d.ts
+++ b/api/_types/cluster.allocation_explain.d.ts
@@ -71,7 +71,7 @@ export type NodeAllocationExplanation = {
   node_name: Common.Name;
   store?: AllocationStore;
   transport_address: Common.TransportAddress;
-  weight_ranking: number;
+  weight_ranking?: number;
 }
 
 export type NodeDiskUsage = {
diff --git a/api/_types/flow_framework.common.d.ts b/api/_types/flow_framework.common.d.ts
index 16576ccb3..521780490 100644
--- a/api/_types/flow_framework.common.d.ts
+++ b/api/_types/flow_framework.common.d.ts
@@ -14,6 +14,7 @@
  * modify the API generator.
  */
 
+import * as Common from './_common'
 
 export type All = boolean
 
@@ -40,10 +41,12 @@ export type FlowFrameworkDeleteResponse = {
 export type FlowFrameworkGetResponse = {
   created_time?: number;
   description?: string;
+  last_provisioned_time?: number;
   last_updated_time?: number;
   name?: string;
   use_case?: string;
   user?: user;
+  version?: version;
   workflows?: Record<string, any>;
 }
 
@@ -57,7 +60,7 @@ export type FlowFrameworkUpdate = {
 
 export type hits = {
   hits?: itemsObject[];
-  max_score?: number;
+  max_score?: undefined | number;
   total?: total;
 }
 
@@ -93,13 +96,14 @@ export type SearchWorkflowRequest = {
 
 export type shards = {
   failed?: number;
+  skipped?: number;
   successful?: number;
   total?: number;
 }
 
 export type StateHits = {
   hits?: StateItems[];
-  max_score?: number;
+  max_score?: undefined | number;
   total?: total;
 }
 
@@ -141,6 +145,10 @@ export type version = {
 
 export type WorkflowID = string
 
+export type WorkflowIDResponse = {
+  workflow_id?: string;
+}
+
 export type WorkflowSearchResponse = {
   _shards?: shards;
   hits?: hits;
@@ -178,7 +186,10 @@ export type WorkflowStep = {
   inputs?: string[];
   outputs?: string[];
   required_plugins?: string[];
+  timeout?: Common.Duration;
 }
 
 export type WorkflowStepName = string
 
+export type WorkflowSteps = Record<string, WorkflowStep>
+
diff --git a/api/_types/flow_framework.errors.d.ts b/api/_types/flow_framework.errors.d.ts
index 5eda51732..7f9be3f61 100644
--- a/api/_types/flow_framework.errors.d.ts
+++ b/api/_types/flow_framework.errors.d.ts
@@ -20,7 +20,10 @@ export type BadRequestError = {
   status?: number;
 }
 
-export type ConflictError = Record<string, any>
+export type ConflictError = {
+  error?: string;
+  status?: number;
+}
 
 export type DeprovisioningError = {
   error: string;
@@ -35,22 +38,39 @@ export type DuplicateKeyError = {
   status?: number;
 }
 
-export type FlowFrameworkAPIDisabledError = Record<string, any>
+export type FlowFrameworkAPIDisabledError = {
+  error?: string;
+  status?: number;
+}
 
-export type InvalidParameterError = Record<string, any>
+export type InvalidParameterError = {
+  error?: string;
+  status?: number;
+}
 
 export type InvalidRequestBodyFieldError = {
   error?: string;
   status?: number;
 }
 
-export type InvalidTemplateVersionError = Record<string, any>
+export type InvalidTemplateVersionError = {
+  error?: string;
+}
 
-export type MaxWorkflowsLimitError = Record<string, any>
+export type MaxWorkflowsLimitError = {
+  code?: number;
+  error?: string;
+}
 
-export type MissingParameterError = Record<string, any>
+export type MissingParameterError = {
+  error?: string;
+  status?: number;
+}
 
-export type ParameterConflictError = Record<string, any>
+export type ParameterConflictError = {
+  error?: string;
+  status?: number;
+}
 
 export type RequestBodyParsingFailedError = {
   error?: string;
@@ -66,15 +86,31 @@ export type TemplateNameRequiredError = {
   error?: string;
 }
 
-export type TemplateNotFoundError = Record<string, any>
+export type TemplateNotFoundError = {
+  code?: number;
+  error?: string;
+}
 
-export type UnsupportedFieldUpdateError = Record<string, any>
+export type UnsupportedFieldUpdateError = {
+  error?: string;
+}
 
-export type WorkFlowIdNullError = Record<string, any>
+export type WorkFlowIdNullError = {
+  error?: string;
+  status?: number;
+}
 
-export type WorkflowParsingError = Record<string, any>
+export type WorkflowParsingError = {
+  error?: string;
+}
 
-export type WorkflowSaveError = Record<string, any>
+export type WorkflowSaveError = {
+  error?: string;
+  status?: number;
+}
 
-export type WorkflowStepsRetrieveError = Record<string, any>
+export type WorkflowStepsRetrieveError = {
+  code?: number;
+  error?: string;
+}
 
diff --git a/api/_types/indices._common.d.ts b/api/_types/indices._common.d.ts
index 42a5c0091..c70a0323d 100644
--- a/api/_types/indices._common.d.ts
+++ b/api/_types/indices._common.d.ts
@@ -74,6 +74,11 @@ export type FielddataFrequencyFilter = {
 
 export type IndexCheckOnStartup = 'checksum' | 'false' | 'true'
 
+export type IndexError = {
+  error?: IndexErrorCause;
+  status?: number;
+}
+
 export type IndexErrorCause = {
   index?: Common.IndexName;
   index_uuid?: Common.Uuid;
diff --git a/api/_types/query._common.d.ts b/api/_types/query._common.d.ts
index 49b0582d9..c9540bd2a 100644
--- a/api/_types/query._common.d.ts
+++ b/api/_types/query._common.d.ts
@@ -53,12 +53,17 @@ export type DataSourceRetrieve = {
   status: string;
 }
 
-export type ErrorResponse = {
+export type Error = {
   reason: string;
   root_cause: RootCause[];
   type: string;
 }
 
+export type ErrorResponse = {
+  error?: Error;
+  status?: number;
+}
+
 export type RootCause = {
   reason: string;
   type: string;
diff --git a/api/_types/security._common.d.ts b/api/_types/security._common.d.ts
index de48173c1..f8e3ec5c2 100644
--- a/api/_types/security._common.d.ts
+++ b/api/_types/security._common.d.ts
@@ -183,6 +183,11 @@ export type DynamicOptions = {
   respect_request_indices_options?: boolean;
 }
 
+export type Error = {
+  message?: string;
+  status?: 'BAD_REQUEST' | 'CONFLICT' | 'FORBIDDEN' | 'INTERNAL_SERVER_ERROR' | 'NOT_FOUND' | 'NOT_IMPLEMENTED' | 'UNAUTHORIZED';
+}
+
 export type GenerateOBOToken = {
   authenticationToken?: string;
   durationSeconds?: string;
diff --git a/api/flowFramework/delete.d.ts b/api/flowFramework/delete.d.ts
index a577c227f..4bd889dd9 100644
--- a/api/flowFramework/delete.d.ts
+++ b/api/flowFramework/delete.d.ts
@@ -27,5 +27,5 @@ export type FlowFramework_Delete_Response = ApiResponse & {
   body: FlowFramework_Delete_ResponseBody;
 }
 
-export type FlowFramework_Delete_ResponseBody = Record<string, any>
+export type FlowFramework_Delete_ResponseBody = FlowFramework_Common.FlowFrameworkDeleteResponse
 
diff --git a/api/flowFramework/deprovision.d.ts b/api/flowFramework/deprovision.d.ts
index 2c9fefec9..666958eae 100644
--- a/api/flowFramework/deprovision.d.ts
+++ b/api/flowFramework/deprovision.d.ts
@@ -27,5 +27,5 @@ export type FlowFramework_Deprovision_Response = ApiResponse & {
   body: FlowFramework_Deprovision_ResponseBody;
 }
 
-export type FlowFramework_Deprovision_ResponseBody = Record<string, any>
+export type FlowFramework_Deprovision_ResponseBody = FlowFramework_Common.WorkflowIDResponse
 
diff --git a/api/flowFramework/get.d.ts b/api/flowFramework/get.d.ts
index cb7001598..dce19cf82 100644
--- a/api/flowFramework/get.d.ts
+++ b/api/flowFramework/get.d.ts
@@ -26,5 +26,5 @@ export type FlowFramework_Get_Response = ApiResponse & {
   body: FlowFramework_Get_ResponseBody;
 }
 
-export type FlowFramework_Get_ResponseBody = Record<string, any>
+export type FlowFramework_Get_ResponseBody = FlowFramework_Common.FlowFrameworkGetResponse
 
diff --git a/api/flowFramework/getStatus.d.ts b/api/flowFramework/getStatus.d.ts
index 80eaeeaf8..49e36fdf5 100644
--- a/api/flowFramework/getStatus.d.ts
+++ b/api/flowFramework/getStatus.d.ts
@@ -27,5 +27,5 @@ export type FlowFramework_GetStatus_Response = ApiResponse & {
   body: FlowFramework_GetStatus_ResponseBody;
 }
 
-export type FlowFramework_GetStatus_ResponseBody = Record<string, any>
+export type FlowFramework_GetStatus_ResponseBody = FlowFramework_Common.WorkFlowStatusFullResponse | FlowFramework_Common.WorkFlowStatusDefaultResponse
 
diff --git a/api/flowFramework/getSteps.d.ts b/api/flowFramework/getSteps.d.ts
index ebc0e0137..2f4b4428b 100644
--- a/api/flowFramework/getSteps.d.ts
+++ b/api/flowFramework/getSteps.d.ts
@@ -26,5 +26,5 @@ export type FlowFramework_GetSteps_Response = ApiResponse & {
   body: FlowFramework_GetSteps_ResponseBody;
 }
 
-export type FlowFramework_GetSteps_ResponseBody = Record<string, any>
+export type FlowFramework_GetSteps_ResponseBody = FlowFramework_Common.WorkflowSteps
 
diff --git a/api/flowFramework/provision.d.ts b/api/flowFramework/provision.d.ts
index 7105c4c59..c75925804 100644
--- a/api/flowFramework/provision.d.ts
+++ b/api/flowFramework/provision.d.ts
@@ -27,5 +27,5 @@ export type FlowFramework_Provision_Response = ApiResponse & {
   body: FlowFramework_Provision_ResponseBody;
 }
 
-export type FlowFramework_Provision_ResponseBody = Record<string, any>
+export type FlowFramework_Provision_ResponseBody = FlowFramework_Common.WorkflowIDResponse
 
diff --git a/api/flowFramework/search.d.ts b/api/flowFramework/search.d.ts
index 010b96b0c..cd8b992d6 100644
--- a/api/flowFramework/search.d.ts
+++ b/api/flowFramework/search.d.ts
@@ -26,5 +26,5 @@ export type FlowFramework_Search_Response = ApiResponse & {
   body: FlowFramework_Search_ResponseBody;
 }
 
-export type FlowFramework_Search_ResponseBody = Record<string, any>
+export type FlowFramework_Search_ResponseBody = FlowFramework_Common.WorkflowSearchResponse
 
diff --git a/api/flowFramework/searchState.d.ts b/api/flowFramework/searchState.d.ts
index 0b9d2d1fa..5113d2b97 100644
--- a/api/flowFramework/searchState.d.ts
+++ b/api/flowFramework/searchState.d.ts
@@ -26,5 +26,5 @@ export type FlowFramework_SearchState_Response = ApiResponse & {
   body: FlowFramework_SearchState_ResponseBody;
 }
 
-export type FlowFramework_SearchState_ResponseBody = Record<string, any>
+export type FlowFramework_SearchState_ResponseBody = FlowFramework_Common.WorkflowSearchStateResponse
 
diff --git a/api/index.d.ts b/api/index.d.ts
index 1cd27fffe..ddf97692b 100644
--- a/api/index.d.ts
+++ b/api/index.d.ts
@@ -159,6 +159,9 @@ import { Ingest_DeletePipeline_Request, Ingest_DeletePipeline_Response, Ingest_D
 import { Ingest_PutPipeline_Request, Ingest_PutPipeline_RequestBody, Ingest_PutPipeline_Response, Ingest_PutPipeline_ResponseBody } from './ingest/putPipeline';
 import { Ingest_ProcessorGrok_Request, Ingest_ProcessorGrok_Response, Ingest_ProcessorGrok_ResponseBody } from './ingest/processorGrok';
 import { Insights_TopQueries_Request, Insights_TopQueries_Response, Insights_TopQueries_ResponseBody } from './insights/topQueries';
+import { List_Help_Request, List_Help_Response, List_Help_ResponseBody } from './list/help';
+import { List_Indices_Request, List_Indices_Response, List_Indices_ResponseBody } from './list/indices';
+import { List_Shards_Request, List_Shards_Response, List_Shards_ResponseBody } from './list/shards';
 import { Nodes_Info_Request, Nodes_Info_Response, Nodes_Info_ResponseBody } from './nodes/info';
 import { Nodes_HotThreads_Request, Nodes_HotThreads_Response, Nodes_HotThreads_ResponseBody } from './nodes/hotThreads';
 import { Nodes_ReloadSecureSettings_Request, Nodes_ReloadSecureSettings_RequestBody, Nodes_ReloadSecureSettings_Response, Nodes_ReloadSecureSettings_ResponseBody } from './nodes/reloadSecureSettings';
@@ -500,6 +503,9 @@ export {
   Ingest_PutPipeline_Request, Ingest_PutPipeline_RequestBody, Ingest_PutPipeline_Response, Ingest_PutPipeline_ResponseBody,
   Ingest_ProcessorGrok_Request, Ingest_ProcessorGrok_Response, Ingest_ProcessorGrok_ResponseBody,
   Insights_TopQueries_Request, Insights_TopQueries_Response, Insights_TopQueries_ResponseBody,
+  List_Help_Request, List_Help_Response, List_Help_ResponseBody,
+  List_Indices_Request, List_Indices_Response, List_Indices_ResponseBody,
+  List_Shards_Request, List_Shards_Response, List_Shards_ResponseBody,
   Nodes_Info_Request, Nodes_Info_Response, Nodes_Info_ResponseBody,
   Nodes_HotThreads_Request, Nodes_HotThreads_Response, Nodes_HotThreads_ResponseBody,
   Nodes_ReloadSecureSettings_Request, Nodes_ReloadSecureSettings_RequestBody, Nodes_ReloadSecureSettings_Response, Nodes_ReloadSecureSettings_ResponseBody,
diff --git a/api/list/_api.js b/api/list/_api.js
new file mode 100644
index 000000000..68709214f
--- /dev/null
+++ b/api/list/_api.js
@@ -0,0 +1,28 @@
+/*
+ * Copyright OpenSearch Contributors
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ *
+ */
+
+/*
+ * This file was generated from the OpenSearch API Spec. Do NOT edit it
+ * manually. If you want to make changes, either update the spec or
+ * modify the API generator.
+ */
+
+'use strict';
+
+/** @namespace API-List */
+
+function ListApi(bindObj) {
+  this.help = require('./help').bind(bindObj);
+  this.indices = require('./indices').bind(bindObj);
+  this.shards = require('./shards').bind(bindObj);
+
+}
+
+module.exports = ListApi;
diff --git a/api/list/help.d.ts b/api/list/help.d.ts
new file mode 100644
index 000000000..f9fdfde73
--- /dev/null
+++ b/api/list/help.d.ts
@@ -0,0 +1,27 @@
+/*
+ * Copyright OpenSearch Contributors
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ *
+ */
+
+/*
+ * This file was generated from the OpenSearch API Spec. Do NOT edit it
+ * manually. If you want to make changes, either update the spec or
+ * modify the API generator.
+ */
+
+import { ApiResponse } from '../../lib/Transport'
+import * as Global from '../_types/_global'
+
+export type List_Help_Request = Global.Params & Record<string, any>
+
+export type List_Help_Response = ApiResponse & {
+  body: List_Help_ResponseBody;
+}
+
+export type List_Help_ResponseBody = Record<string, any>
+
diff --git a/api/list/help.js b/api/list/help.js
new file mode 100644
index 000000000..7f74b972f
--- /dev/null
+++ b/api/list/help.js
@@ -0,0 +1,45 @@
+/*
+ * Copyright OpenSearch Contributors
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ *
+ */
+
+/*
+ * This file was generated from the OpenSearch API Spec. Do NOT edit it
+ * manually. If you want to make changes, either update the spec or
+ * modify the API generator.
+ */
+
+'use strict';
+
+const { normalizeArguments } = require('../utils');
+
+/**
+ * Returns help for the List APIs.
+ * <br/> See Also: {@link https://opensearch.org/docs/latest/api-reference/list/index/ - list.help}
+ *
+ * @memberOf API-List
+ *
+ * @param {object} [params] - (Unused)
+ * @param {TransportRequestOptions} [options] - Options for {@link Transport#request}
+ * @param {function} [callback] - Callback that handles errors and response
+ *
+ * @returns {{abort: function(), then: function(), catch: function()}|Promise<never>|*}
+ */
+function helpFunc(params, options, callback) {
+  [params, options, callback] = normalizeArguments(params, options, callback);
+
+  let { body, ...querystring } = params;
+
+  const path = '/_list';
+  const method = 'GET';
+  body = body || '';
+
+  return this.transport.request({ method, path, querystring, body }, options, callback);
+}
+
+module.exports = helpFunc;
diff --git a/api/list/indices.d.ts b/api/list/indices.d.ts
new file mode 100644
index 000000000..870294194
--- /dev/null
+++ b/api/list/indices.d.ts
@@ -0,0 +1,51 @@
+/*
+ * Copyright OpenSearch Contributors
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ *
+ */
+
+/*
+ * This file was generated from the OpenSearch API Spec. Do NOT edit it
+ * manually. If you want to make changes, either update the spec or
+ * modify the API generator.
+ */
+
+import { ApiResponse } from '../../lib/Transport'
+import * as Cat_Indices from '../_types/cat.indices'
+import * as Common from '../_types/_common'
+import * as Global from '../_types/_global'
+
+export type List_Indices_Request = Global.Params & {
+  bytes?: Common.ByteUnit;
+  cluster_manager_timeout?: Common.Duration;
+  expand_wildcards?: Common.ExpandWildcards;
+  format?: string;
+  h?: string[];
+  health?: Common.HealthStatus;
+  help?: boolean;
+  include_unloaded_segments?: boolean;
+  index?: Common.Indices;
+  local?: boolean;
+  master_timeout?: Common.Duration;
+  next_token?: undefined | string;
+  pri?: boolean;
+  s?: string[];
+  size?: number;
+  sort?: 'asc' | 'desc';
+  time?: Common.TimeUnit;
+  v?: boolean;
+}
+
+export type List_Indices_Response = ApiResponse & {
+  body: List_Indices_ResponseBody;
+}
+
+export type List_Indices_ResponseBody = {
+  indices?: Cat_Indices.IndicesRecord[];
+  next_token?: undefined | string;
+}
+
diff --git a/api/list/indices.js b/api/list/indices.js
new file mode 100644
index 000000000..19fa6ffae
--- /dev/null
+++ b/api/list/indices.js
@@ -0,0 +1,65 @@
+/*
+ * Copyright OpenSearch Contributors
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ *
+ */
+
+/*
+ * This file was generated from the OpenSearch API Spec. Do NOT edit it
+ * manually. If you want to make changes, either update the spec or
+ * modify the API generator.
+ */
+
+'use strict';
+
+const { normalizeArguments, parsePathParam } = require('../utils');
+
+/**
+ * Returns paginated information about indexes including number of primaries and replicas, document counts, disk size.
+ * <br/> See Also: {@link https://opensearch.org/docs/latest/api-reference/list/list-indices/ - list.indices}
+ *
+ * @memberOf API-List
+ *
+ * @param {object} [params]
+ * @param {string} [params.bytes] - The unit used to display byte values.
+ * @param {string} [params.cluster_manager_timeout] - Operation timeout for connection to cluster-manager node.
+ * @param {string} [params.expand_wildcards] - The type of index that wildcard patterns can match.
+ * @param {string} [params.format] - A short version of the Accept header, such as `JSON`, `YAML`.
+ * @param {array} [params.h] - Comma-separated list of column names to display.
+ * @param {string} [params.health] - The health status used to limit returned indexes. By default, the response includes indexes of any health status.
+ * @param {boolean} [params.help=false] - Return help information.
+ * @param {boolean} [params.include_unloaded_segments=false] - If true, the response includes information from segments that are not loaded into memory.
+ * @param {boolean} [params.local=false] - Return local information, do not retrieve the state from cluster-manager node.
+ * @param {string} [params.master_timeout] DEPRECATED - Operation timeout for connection to cluster manager node.
+ * @param {null | string} [params.next_token] - Token to retrieve next page of indexes.
+ * @param {boolean} [params.pri=false] - If true, the response only includes information from primary shards.
+ * @param {array} [params.s] - Comma-separated list of column names or column aliases to sort by.
+ * @param {number} [params.size] - Maximum number of indexes to be displayed in a page.
+ * @param {string} [params.sort] - Defines order in which indexes will be displayed. Accepted values are `asc` and `desc`. If `desc`, most recently created indexes would be displayed first.
+ * @param {string} [params.time] - The unit used to display time values.
+ * @param {boolean} [params.v=false] - Verbose mode. Display column headers.
+ * @param {string} [params.index] - Comma-separated list of data streams, indexes, and aliases used to limit the request. Supports wildcards (`*`). To target all data streams and indexes, omit this parameter or use `*` or `_all`.
+ *
+ * @param {TransportRequestOptions} [options] - Options for {@link Transport#request}
+ * @param {function} [callback] - Callback that handles errors and response
+ *
+ * @returns {{abort: function(), then: function(), catch: function()}|Promise<never>|*}
+ */
+function indicesFunc(params, options, callback) {
+  [params, options, callback] = normalizeArguments(params, options, callback);
+
+  let { body, index, ...querystring } = params;
+  index = parsePathParam(index);
+
+  const path = ['/_list/indices/', index].filter(c => c).join('').replace('//', '/');
+  const method = 'GET';
+  body = body || '';
+
+  return this.transport.request({ method, path, querystring, body }, options, callback);
+}
+
+module.exports = indicesFunc;
diff --git a/api/list/shards.d.ts b/api/list/shards.d.ts
new file mode 100644
index 000000000..82fa17c1e
--- /dev/null
+++ b/api/list/shards.d.ts
@@ -0,0 +1,47 @@
+/*
+ * Copyright OpenSearch Contributors
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ *
+ */
+
+/*
+ * This file was generated from the OpenSearch API Spec. Do NOT edit it
+ * manually. If you want to make changes, either update the spec or
+ * modify the API generator.
+ */
+
+import { ApiResponse } from '../../lib/Transport'
+import * as Cat_Shards from '../_types/cat.shards'
+import * as Common from '../_types/_common'
+import * as Global from '../_types/_global'
+
+export type List_Shards_Request = Global.Params & {
+  bytes?: Common.ByteUnit;
+  cluster_manager_timeout?: Common.Duration;
+  format?: string;
+  h?: string[];
+  help?: boolean;
+  index?: Common.Indices;
+  local?: boolean;
+  master_timeout?: Common.Duration;
+  next_token?: undefined | string;
+  s?: string[];
+  size?: number;
+  sort?: 'asc' | 'desc';
+  time?: Common.TimeUnit;
+  v?: boolean;
+}
+
+export type List_Shards_Response = ApiResponse & {
+  body: List_Shards_ResponseBody;
+}
+
+export type List_Shards_ResponseBody = {
+  next_token?: undefined | string;
+  shards?: Cat_Shards.ShardsRecord[];
+}
+
diff --git a/api/list/shards.js b/api/list/shards.js
new file mode 100644
index 000000000..ba43382d6
--- /dev/null
+++ b/api/list/shards.js
@@ -0,0 +1,61 @@
+/*
+ * Copyright OpenSearch Contributors
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ *
+ */
+
+/*
+ * This file was generated from the OpenSearch API Spec. Do NOT edit it
+ * manually. If you want to make changes, either update the spec or
+ * modify the API generator.
+ */
+
+'use strict';
+
+const { normalizeArguments, parsePathParam } = require('../utils');
+
+/**
+ * Returns paginated details of shard allocation on nodes.
+ * <br/> See Also: {@link https://opensearch.org/docs/latest/api-reference/list/list-shards/ - list.shards}
+ *
+ * @memberOf API-List
+ *
+ * @param {object} [params]
+ * @param {string} [params.bytes] - The unit used to display byte values.
+ * @param {string} [params.cluster_manager_timeout] - Operation timeout for connection to cluster-manager node.
+ * @param {string} [params.format] - A short version of the Accept header, such as `JSON`, `YAML`.
+ * @param {array} [params.h] - Comma-separated list of column names to display.
+ * @param {boolean} [params.help=false] - Return help information.
+ * @param {boolean} [params.local=false] - Return local information, do not retrieve the state from cluster-manager node.
+ * @param {string} [params.master_timeout] DEPRECATED - Operation timeout for connection to cluster manager node.
+ * @param {null | string} [params.next_token] - Token to retrieve next page of shards.
+ * @param {array} [params.s] - Comma-separated list of column names or column aliases to sort by.
+ * @param {number} [params.size] - Maximum number of shards to be displayed in a page.
+ * @param {string} [params.sort] - Defines order in which shards will be displayed. Accepted values are `asc` and `desc`. If `desc`, most recently created shards would be displayed first.
+ * @param {string} [params.time] - The unit in which to display time values.
+ * @param {boolean} [params.v=false] - Verbose mode. Display column headers.
+ * @param {string} [params.index] - A comma-separated list of data streams, indexes, and aliases used to limit the request. Supports wildcards (`*`). To target all data streams and indexes, omit this parameter or use `*` or `_all`.
+ *
+ * @param {TransportRequestOptions} [options] - Options for {@link Transport#request}
+ * @param {function} [callback] - Callback that handles errors and response
+ *
+ * @returns {{abort: function(), then: function(), catch: function()}|Promise<never>|*}
+ */
+function shardsFunc(params, options, callback) {
+  [params, options, callback] = normalizeArguments(params, options, callback);
+
+  let { body, index, ...querystring } = params;
+  index = parsePathParam(index);
+
+  const path = ['/_list/shards/', index].filter(c => c).join('').replace('//', '/');
+  const method = 'GET';
+  body = body || '';
+
+  return this.transport.request({ method, path, querystring, body }, options, callback);
+}
+
+module.exports = shardsFunc;
diff --git a/api/sql/close.d.ts b/api/sql/close.d.ts
index e33df7a0a..a6fb7c26b 100644
--- a/api/sql/close.d.ts
+++ b/api/sql/close.d.ts
@@ -19,7 +19,7 @@ import * as Global from '../_types/_global'
 import * as Sql_Common from '../_types/sql._common'
 
 export type Sql_Close_Request = Global.Params & {
-  body: Sql_Common.SqlClose;
+  body?: Sql_Common.SqlClose;
   format?: string;
   sanitize?: boolean;
 }
diff --git a/api/sql/close.js b/api/sql/close.js
index 280ac1dbb..4c814e266 100644
--- a/api/sql/close.js
+++ b/api/sql/close.js
@@ -16,7 +16,7 @@
 
 'use strict';
 
-const { normalizeArguments, handleMissingParam } = require('../utils');
+const { normalizeArguments } = require('../utils');
 
 /**
  * Clear the cursor context.
@@ -24,10 +24,10 @@ const { normalizeArguments, handleMissingParam } = require('../utils');
  *
  * @memberOf API-Sql
  *
- * @param {object} params
+ * @param {object} [params]
  * @param {string} [params.format] - A short version of the Accept header, e.g. json, yaml.
  * @param {boolean} [params.sanitize=true] - Specifies whether to escape special characters in the results
- * @param {object} params.body 
+ * @param {object} [params.body] 
  *
  * @param {TransportRequestOptions} [options] - Options for {@link Transport#request}
  * @param {function} [callback] - Callback that handles errors and response
@@ -36,12 +36,12 @@ const { normalizeArguments, handleMissingParam } = require('../utils');
  */
 function closeFunc(params, options, callback) {
   [params, options, callback] = normalizeArguments(params, options, callback);
-  if (params.body == null) return handleMissingParam('body', this, callback);
 
   let { body, ...querystring } = params;
 
   const path = '/_plugins/_sql/close';
   const method = 'POST';
+  body = body || '';
 
   return this.transport.request({ method, path, querystring, body }, options, callback);
 }
diff --git a/api/sql/explain.d.ts b/api/sql/explain.d.ts
index be70e04ea..2a6284270 100644
--- a/api/sql/explain.d.ts
+++ b/api/sql/explain.d.ts
@@ -19,7 +19,7 @@ import * as Global from '../_types/_global'
 import * as Sql_Common from '../_types/sql._common'
 
 export type Sql_Explain_Request = Global.Params & {
-  body: Sql_Common.Explain;
+  body?: Sql_Common.Explain;
   format?: string;
   sanitize?: boolean;
 }
diff --git a/api/sql/explain.js b/api/sql/explain.js
index aa2c32859..c24e00b87 100644
--- a/api/sql/explain.js
+++ b/api/sql/explain.js
@@ -16,7 +16,7 @@
 
 'use strict';
 
-const { normalizeArguments, handleMissingParam } = require('../utils');
+const { normalizeArguments } = require('../utils');
 
 /**
  * Shows how a query is executed against OpenSearch.
@@ -24,10 +24,10 @@ const { normalizeArguments, handleMissingParam } = require('../utils');
  *
  * @memberOf API-Sql
  *
- * @param {object} params
+ * @param {object} [params]
  * @param {string} [params.format] - A short version of the Accept header, e.g. json, yaml.
  * @param {boolean} [params.sanitize=true] - Specifies whether to escape special characters in the results
- * @param {object} params.body 
+ * @param {object} [params.body] 
  *
  * @param {TransportRequestOptions} [options] - Options for {@link Transport#request}
  * @param {function} [callback] - Callback that handles errors and response
@@ -36,12 +36,12 @@ const { normalizeArguments, handleMissingParam } = require('../utils');
  */
 function explainFunc(params, options, callback) {
   [params, options, callback] = normalizeArguments(params, options, callback);
-  if (params.body == null) return handleMissingParam('body', this, callback);
 
   let { body, ...querystring } = params;
 
   const path = '/_plugins/_sql/_explain';
   const method = 'POST';
+  body = body || '';
 
   return this.transport.request({ method, path, querystring, body }, options, callback);
 }
diff --git a/api/sql/postStats.d.ts b/api/sql/postStats.d.ts
index 159cecc4c..10885bd14 100644
--- a/api/sql/postStats.d.ts
+++ b/api/sql/postStats.d.ts
@@ -19,7 +19,7 @@ import * as Global from '../_types/_global'
 import * as Sql_Common from '../_types/sql._common'
 
 export type Sql_PostStats_Request = Global.Params & {
-  body: Sql_Common.Stats;
+  body?: Sql_Common.Stats;
   format?: string;
   sanitize?: boolean;
 }
diff --git a/api/sql/postStats.js b/api/sql/postStats.js
index 7906f5626..9f5b23624 100644
--- a/api/sql/postStats.js
+++ b/api/sql/postStats.js
@@ -16,7 +16,7 @@
 
 'use strict';
 
-const { normalizeArguments, handleMissingParam } = require('../utils');
+const { normalizeArguments } = require('../utils');
 
 /**
  * By a stats endpoint, you are able to collect metrics for the plugin within the interval.
@@ -24,10 +24,10 @@ const { normalizeArguments, handleMissingParam } = require('../utils');
  *
  * @memberOf API-Sql
  *
- * @param {object} params
+ * @param {object} [params]
  * @param {string} [params.format] - A short version of the Accept header, e.g. json, yaml.
  * @param {boolean} [params.sanitize=true] - Specifies whether to escape special characters in the results
- * @param {object} params.body 
+ * @param {object} [params.body] 
  *
  * @param {TransportRequestOptions} [options] - Options for {@link Transport#request}
  * @param {function} [callback] - Callback that handles errors and response
@@ -36,12 +36,12 @@ const { normalizeArguments, handleMissingParam } = require('../utils');
  */
 function postStatsFunc(params, options, callback) {
   [params, options, callback] = normalizeArguments(params, options, callback);
-  if (params.body == null) return handleMissingParam('body', this, callback);
 
   let { body, ...querystring } = params;
 
   const path = '/_plugins/_sql/stats';
   const method = 'POST';
+  body = body || '';
 
   return this.transport.request({ method, path, querystring, body }, options, callback);
 }
diff --git a/api/sql/query.d.ts b/api/sql/query.d.ts
index 3684e11a4..c2f1d6281 100644
--- a/api/sql/query.d.ts
+++ b/api/sql/query.d.ts
@@ -19,7 +19,7 @@ import * as Global from '../_types/_global'
 import * as Sql_Common from '../_types/sql._common'
 
 export type Sql_Query_Request = Global.Params & {
-  body: Sql_Common.Query;
+  body?: Sql_Common.Query;
   format?: string;
   sanitize?: boolean;
 }
diff --git a/api/sql/query.js b/api/sql/query.js
index bc986ed81..cd0fded90 100644
--- a/api/sql/query.js
+++ b/api/sql/query.js
@@ -16,7 +16,7 @@
 
 'use strict';
 
-const { normalizeArguments, handleMissingParam } = require('../utils');
+const { normalizeArguments } = require('../utils');
 
 /**
  * Send a SQL/PPL query to the SQL plugin.
@@ -24,10 +24,10 @@ const { normalizeArguments, handleMissingParam } = require('../utils');
  *
  * @memberOf API-Sql
  *
- * @param {object} params
+ * @param {object} [params]
  * @param {string} [params.format] - A short version of the Accept header, e.g. json, yaml.
  * @param {boolean} [params.sanitize=true] - Specifies whether to escape special characters in the results
- * @param {object} params.body 
+ * @param {object} [params.body] 
  *
  * @param {TransportRequestOptions} [options] - Options for {@link Transport#request}
  * @param {function} [callback] - Callback that handles errors and response
@@ -36,12 +36,12 @@ const { normalizeArguments, handleMissingParam } = require('../utils');
  */
 function queryFunc(params, options, callback) {
   [params, options, callback] = normalizeArguments(params, options, callback);
-  if (params.body == null) return handleMissingParam('body', this, callback);
 
   let { body, ...querystring } = params;
 
   const path = '/_plugins/_sql';
   const method = 'POST';
+  body = body || '';
 
   return this.transport.request({ method, path, querystring, body }, options, callback);
 }
diff --git a/api/sql/settings.d.ts b/api/sql/settings.d.ts
index 0f0b54147..3ee2e64b8 100644
--- a/api/sql/settings.d.ts
+++ b/api/sql/settings.d.ts
@@ -19,7 +19,7 @@ import * as Global from '../_types/_global'
 import * as Sql_Common from '../_types/sql._common'
 
 export type Sql_Settings_Request = Global.Params & {
-  body: Sql_Settings_RequestBody;
+  body?: Sql_Settings_RequestBody;
   format?: string;
 }
 
diff --git a/api/sql/settings.js b/api/sql/settings.js
index 050bec68a..b627be1fb 100644
--- a/api/sql/settings.js
+++ b/api/sql/settings.js
@@ -16,7 +16,7 @@
 
 'use strict';
 
-const { normalizeArguments, handleMissingParam } = require('../utils');
+const { normalizeArguments } = require('../utils');
 
 /**
  * Adds SQL settings to the standard OpenSearch cluster settings.
@@ -24,9 +24,9 @@ const { normalizeArguments, handleMissingParam } = require('../utils');
  *
  * @memberOf API-Sql
  *
- * @param {object} params
+ * @param {object} [params]
  * @param {string} [params.format] - A short version of the Accept header, e.g. json, yaml.
- * @param {string} params.body 
+ * @param {string} [params.body] 
  *
  * @param {TransportRequestOptions} [options] - Options for {@link Transport#request}
  * @param {function} [callback] - Callback that handles errors and response
@@ -35,12 +35,12 @@ const { normalizeArguments, handleMissingParam } = require('../utils');
  */
 function settingsFunc(params, options, callback) {
   [params, options, callback] = normalizeArguments(params, options, callback);
-  if (params.body == null) return handleMissingParam('body', this, callback);
 
   let { body, ...querystring } = params;
 
   const path = '/_plugins/_query/settings';
   const method = 'PUT';
+  body = body || '';
 
   return this.transport.request({ method, path, querystring, body }, options, callback);
 }