diff --git a/neurostore-openapi.yml b/neurostore-openapi.yml
index 2e60b59..917db84 100644
--- a/neurostore-openapi.yml
+++ b/neurostore-openapi.yml
@@ -173,13 +173,34 @@ paths:
       parameters:
         - name: feature_filter
           in: query
-          description: Filter results by feature content using jsonpath syntax
+          description: >
+            Filter results by feature content. Format: "PipelineName[:version]:field_path=value".
+            Examples:
+              - "TestPipeline:1.0.0:groups.diagnosis=ADHD" (specific version)
+              - "TestPipeline:groups.diagnosis=ADHD" (latest version)
+            
+            Field path supports array notation with [], regex search with ~, and comparisons with =, >, <, >=, <=.
           required: false
           schema:
             type: array
             items:
               type: string
-              example: 'groups.diagnosis=ADHD'
+              example: 'TestPipeline:1.0.0:groups.diagnosis=ADHD'
+        - name: pipeline_config
+          in: query
+          description: >
+            Filter results by pipeline config content. Format: "PipelineName[:version]:config_path=value".
+            Examples:
+              - "TestPipeline:1.0.0:preprocessing.smoothing=8" (specific version)
+              - "TestPipeline:model.type=linear" (latest version)
+            
+            Config path supports array notation with [], regex search with ~, and comparisons with =, >, <, >=, <=.
+          required: false
+          schema:
+            type: array
+            items:
+              type: string
+              example: 'TestPipeline:1.0.0:preprocessing.smoothing=8'
         - name: study_id
           in: query
           description: Filter results by base study ID
@@ -188,6 +209,12 @@ paths:
             type: array
             items:
               type: string
+        - name: version
+          in: query
+          description: Filter results by pipeline config version
+          required: false
+          schema:
+            type: string
       responses:
         '200':
           description: OK
@@ -1065,10 +1092,34 @@ paths:
       parameters:
         - name: feature_filter
           in: query
-          description: Filter studies by features
+          description: >
+            Filter studies by feature content. Format: "PipelineName[:version]:field_path=value".
+            Examples:
+              - "TestPipeline:1.0.0:predictions.age_mean>20" (specific version)
+              - "TestPipeline:groups.diagnosis=ADHD" (latest version)
+            
+            Field path supports array notation with [], regex search with ~, and comparisons with =, >, <, >=, <=.
           required: false
           schema:
-            type: string
+            type: array
+            items:
+              type: string
+              example: 'TestPipeline:1.0.0:predictions.age_mean>20'
+        - name: pipeline_config
+          in: query
+          description: >
+            Filter studies by pipeline config content. Format: "PipelineName[:version]:config_path=value".
+            Examples:
+              - "TestPipeline:1.0.0:settings.min_age=20" (specific version)
+              - "TestPipeline:model.type=linear" (latest version)
+            
+            Config path supports array notation with [], regex search with ~, and comparisons with =, >, <, >=, <=.
+          required: false
+          schema:
+            type: array
+            items:
+              type: string
+              example: 'TestPipeline:1.0.0:settings.min_age=20'
         - name: feature_display
           in: query
           description: display features from pipelines