diff --git a/infer/src/quandary/ClangTrace.ml b/infer/src/quandary/ClangTrace.ml
index 7f8fbd8c7..c5ff34d5e 100644
--- a/infer/src/quandary/ClangTrace.ml
+++ b/infer/src/quandary/ClangTrace.ml
@@ -54,8 +54,6 @@ module SourceKind = struct
       (QuandaryConfig.Source.of_json Config.quandary_sources)
 
 
-  let endpoints = String.Set.of_list (QuandaryConfig.Endpoint.of_json Config.quandary_endpoints)
-
   (* return a list of source kinds if [procedure_name] is in the list of externally specified sources *)
   let get_external_source qualified_pname =
     let return = None in
@@ -164,7 +162,7 @@ module SourceKind = struct
               (Typ.Procname.ObjC_Cpp.get_class_name cpp_pname)
               (Typ.Procname.get_method pname)
           in
-          if String.Set.mem endpoints qualified_pname then
+          if QuandaryConfig.is_endpoint qualified_pname then
             taint_all_but_this_and_return ~make_source:(fun name desc ->
                 UserControlledEndpoint (name, desc) )
           else if overrides_service_method pname tenv then
diff --git a/infer/src/quandary/QuandaryConfig.ml b/infer/src/quandary/QuandaryConfig.ml
index 648b55112..c82b8cbb1 100644
--- a/infer/src/quandary/QuandaryConfig.ml
+++ b/infer/src/quandary/QuandaryConfig.ml
@@ -74,9 +74,7 @@ module Sanitizer = struct
         []
 end
 
-module Endpoint = struct
-  type t = string
-
+module Endpoints = struct
   let of_json = function
     | `List endpoints ->
         let parse_endpoint = Yojson.Basic.Util.to_string in
@@ -84,3 +82,7 @@ module Endpoint = struct
     | _ ->
         []
 end
+
+let is_endpoint =
+  let endpoints = lazy (String.Set.of_list (Endpoints.of_json Config.quandary_endpoints)) in
+  fun name -> String.Set.mem (Lazy.force endpoints) name
diff --git a/infer/src/quandary/QuandaryConfig.mli b/infer/src/quandary/QuandaryConfig.mli
index 35a638afb..4f7ae3024 100644
--- a/infer/src/quandary/QuandaryConfig.mli
+++ b/infer/src/quandary/QuandaryConfig.mli
@@ -27,9 +27,4 @@ module Sanitizer : sig
   val of_json : [> `List of Yojson.Basic.json list] -> t list
 end
 
-module Endpoint : sig
-  (** name of endpoint class *)
-  type t = string
-
-  val of_json : [> `List of Yojson.Basic.json list] -> t list
-end
+val is_endpoint : string -> bool
diff --git a/infer/src/quandary/TaintAnalysis.ml b/infer/src/quandary/TaintAnalysis.ml
index 0c0c4116e..189034b2e 100644
--- a/infer/src/quandary/TaintAnalysis.ml
+++ b/infer/src/quandary/TaintAnalysis.ml
@@ -116,14 +116,10 @@ module Make (TaintSpecification : TaintSpec.S) = struct
           access_tree
 
 
-    let endpoints =
-      lazy (String.Set.of_list (QuandaryConfig.Endpoint.of_json Config.quandary_endpoints))
-
-
     let is_endpoint source =
       match CallSite.pname (TraceDomain.Source.call_site source) with
       | Typ.Procname.Java java_pname ->
-          String.Set.mem (Lazy.force endpoints) (Typ.Procname.Java.get_class_name java_pname)
+          QuandaryConfig.is_endpoint (Typ.Procname.Java.get_class_name java_pname)
       | _ ->
           false