diff --git a/README.md b/README.md
index 1d49d3ac..f045dcca 100644
--- a/README.md
+++ b/README.md
@@ -34,7 +34,6 @@ Key features of the current API proposal:
 * ability to request a workflow run using CWL or WDL (and maybe future formats)
 * ability to parameterize that workflow using a JSON schema (ideally a future version would be in common between CWL and WDL)
 * ability to get information about running workflows, status, errors, output file locations, etc.
-* to search for workflows by arbitrary key/values
 
 Outstanding questions:
 
diff --git a/openapi/workflow_execution_service.swagger.yaml b/openapi/workflow_execution_service.swagger.yaml
index d5484e62..d0c15b19 100644
--- a/openapi/workflow_execution_service.swagger.yaml
+++ b/openapi/workflow_execution_service.swagger.yaml
@@ -97,14 +97,6 @@ paths:
           in: query
           required: false
           type: string
-        - name: tag_search
-          description: |-
-            OPTIONAL
-            For each key, if the key's value is empty string then match runs that are tagged with
-            this key regardless of value.
-          in: query
-          required: false
-          type: string
       tags:
         - WorkflowExecutionService
     post: