diff --git a/docs/reference.asciidoc b/docs/reference.asciidoc
index eee72b07c..92db3bbab 100644
--- a/docs/reference.asciidoc
+++ b/docs/reference.asciidoc
@@ -4942,14 +4942,14 @@ Retrieves Logstash Pipelines used by Central Management
 {ref}/logstash-api-get-pipeline.html[Endpoint documentation]
 [source,ts]
 ----
-client.logstash.getPipeline({ id })
+client.logstash.getPipeline({ ... })
 ----
 
 [discrete]
 ==== Arguments
 
 * *Request (object):*
-** *`id` (string | string[])*: List of pipeline identifiers.
+** *`id` (Optional, string | string[])*: List of pipeline identifiers.
 
 [discrete]
 ==== put_pipeline
diff --git a/src/api/api/logstash.ts b/src/api/api/logstash.ts
index 0b85093de..9367e308a 100644
--- a/src/api/api/logstash.ts
+++ b/src/api/api/logstash.ts
@@ -73,14 +73,15 @@ export default class Logstash {
     * Retrieves Logstash Pipelines used by Central Management
     * @see {@link https://www.elastic.co/guide/en/elasticsearch/reference/master/logstash-api-get-pipeline.html | Elasticsearch API documentation}
     */
-  async getPipeline (this: That, params: T.LogstashGetPipelineRequest | TB.LogstashGetPipelineRequest, options?: TransportRequestOptionsWithOutMeta): Promise<T.LogstashGetPipelineResponse>
-  async getPipeline (this: That, params: T.LogstashGetPipelineRequest | TB.LogstashGetPipelineRequest, options?: TransportRequestOptionsWithMeta): Promise<TransportResult<T.LogstashGetPipelineResponse, unknown>>
-  async getPipeline (this: That, params: T.LogstashGetPipelineRequest | TB.LogstashGetPipelineRequest, options?: TransportRequestOptions): Promise<T.LogstashGetPipelineResponse>
-  async getPipeline (this: That, params: T.LogstashGetPipelineRequest | TB.LogstashGetPipelineRequest, options?: TransportRequestOptions): Promise<any> {
+  async getPipeline (this: That, params?: T.LogstashGetPipelineRequest | TB.LogstashGetPipelineRequest, options?: TransportRequestOptionsWithOutMeta): Promise<T.LogstashGetPipelineResponse>
+  async getPipeline (this: That, params?: T.LogstashGetPipelineRequest | TB.LogstashGetPipelineRequest, options?: TransportRequestOptionsWithMeta): Promise<TransportResult<T.LogstashGetPipelineResponse, unknown>>
+  async getPipeline (this: That, params?: T.LogstashGetPipelineRequest | TB.LogstashGetPipelineRequest, options?: TransportRequestOptions): Promise<T.LogstashGetPipelineResponse>
+  async getPipeline (this: That, params?: T.LogstashGetPipelineRequest | TB.LogstashGetPipelineRequest, options?: TransportRequestOptions): Promise<any> {
     const acceptedPath: string[] = ['id']
     const querystring: Record<string, any> = {}
     const body = undefined
 
+    params = params ?? {}
     for (const key in params) {
       if (acceptedPath.includes(key)) {
         continue
diff --git a/src/api/types.ts b/src/api/types.ts
index c879844ca..85992592f 100644
--- a/src/api/types.ts
+++ b/src/api/types.ts
@@ -4930,7 +4930,7 @@ export interface MappingFieldNamesField {
   enabled: boolean
 }
 
-export type MappingFieldType = 'none' | 'geo_point' | 'geo_shape' | 'ip' | 'binary' | 'keyword' | 'text' | 'search_as_you_type' | 'date' | 'date_nanos' | 'boolean' | 'completion' | 'nested' | 'object' | 'murmur3' | 'token_count' | 'percolator' | 'integer' | 'long' | 'short' | 'byte' | 'float' | 'half_float' | 'scaled_float' | 'double' | 'integer_range' | 'float_range' | 'long_range' | 'double_range' | 'date_range' | 'ip_range' | 'alias' | 'join' | 'rank_feature' | 'rank_features' | 'flattened' | 'shape' | 'histogram' | 'constant_keyword' | 'aggregate_metric_double' | 'dense_vector' | 'match_only_text'
+export type MappingFieldType = 'none' | 'geo_point' | 'geo_shape' | 'ip' | 'binary' | 'keyword' | 'text' | 'search_as_you_type' | 'date' | 'date_nanos' | 'boolean' | 'completion' | 'nested' | 'object' | 'murmur3' | 'token_count' | 'percolator' | 'integer' | 'long' | 'short' | 'byte' | 'float' | 'half_float' | 'scaled_float' | 'double' | 'integer_range' | 'float_range' | 'long_range' | 'double_range' | 'date_range' | 'ip_range' | 'alias' | 'join' | 'rank_feature' | 'rank_features' | 'flattened' | 'shape' | 'histogram' | 'constant_keyword' | 'aggregate_metric_double' | 'dense_vector' | 'sparse_vector' | 'match_only_text'
 
 export interface MappingFlattenedProperty extends MappingPropertyBase {
   boost?: double
@@ -11809,7 +11809,7 @@ export interface LogstashDeletePipelineRequest extends RequestBase {
 export type LogstashDeletePipelineResponse = boolean
 
 export interface LogstashGetPipelineRequest extends RequestBase {
-  id: Ids
+  id?: Ids
 }
 
 export type LogstashGetPipelineResponse = Record<Id, LogstashPipeline>
diff --git a/src/api/typesWithBodyKey.ts b/src/api/typesWithBodyKey.ts
index 619658ce9..97bdcd548 100644
--- a/src/api/typesWithBodyKey.ts
+++ b/src/api/typesWithBodyKey.ts
@@ -5003,7 +5003,7 @@ export interface MappingFieldNamesField {
   enabled: boolean
 }
 
-export type MappingFieldType = 'none' | 'geo_point' | 'geo_shape' | 'ip' | 'binary' | 'keyword' | 'text' | 'search_as_you_type' | 'date' | 'date_nanos' | 'boolean' | 'completion' | 'nested' | 'object' | 'murmur3' | 'token_count' | 'percolator' | 'integer' | 'long' | 'short' | 'byte' | 'float' | 'half_float' | 'scaled_float' | 'double' | 'integer_range' | 'float_range' | 'long_range' | 'double_range' | 'date_range' | 'ip_range' | 'alias' | 'join' | 'rank_feature' | 'rank_features' | 'flattened' | 'shape' | 'histogram' | 'constant_keyword' | 'aggregate_metric_double' | 'dense_vector' | 'match_only_text'
+export type MappingFieldType = 'none' | 'geo_point' | 'geo_shape' | 'ip' | 'binary' | 'keyword' | 'text' | 'search_as_you_type' | 'date' | 'date_nanos' | 'boolean' | 'completion' | 'nested' | 'object' | 'murmur3' | 'token_count' | 'percolator' | 'integer' | 'long' | 'short' | 'byte' | 'float' | 'half_float' | 'scaled_float' | 'double' | 'integer_range' | 'float_range' | 'long_range' | 'double_range' | 'date_range' | 'ip_range' | 'alias' | 'join' | 'rank_feature' | 'rank_features' | 'flattened' | 'shape' | 'histogram' | 'constant_keyword' | 'aggregate_metric_double' | 'dense_vector' | 'sparse_vector' | 'match_only_text'
 
 export interface MappingFlattenedProperty extends MappingPropertyBase {
   boost?: double
@@ -11989,7 +11989,7 @@ export interface LogstashDeletePipelineRequest extends RequestBase {
 export type LogstashDeletePipelineResponse = boolean
 
 export interface LogstashGetPipelineRequest extends RequestBase {
-  id: Ids
+  id?: Ids
 }
 
 export type LogstashGetPipelineResponse = Record<Id, LogstashPipeline>