diff --git a/dist/cleanup/index.js b/dist/cleanup/index.js
index 2251c34..bb0a7d1 100644
--- a/dist/cleanup/index.js
+++ b/dist/cleanup/index.js
@@ -16401,7 +16401,7 @@ var splitHeader = (value) => {
 };
 
 // src/submodules/serde/value/NumericValue.ts
-var NumericValue = class {
+var NumericValue = class _NumericValue {
   constructor(string, type) {
     this.string = string;
     this.type = type;
@@ -16428,15 +16428,19 @@ var NumericValue = class {
   toString() {
     return this.string;
   }
-  [Symbol.hasInstance](object) {
+  static [Symbol.hasInstance](object) {
     if (!object || typeof object !== "object") {
       return false;
     }
     const _nv = object;
+    const prototypeMatch = _NumericValue.prototype.isPrototypeOf(object.constructor?.prototype);
+    if (prototypeMatch) {
+      return prototypeMatch;
+    }
     if (typeof _nv.string === "string" && typeof _nv.type === "string" && _nv.constructor?.name === "NumericValue") {
       return true;
     }
-    return false;
+    return prototypeMatch;
   }
 };
 function nv(input) {
@@ -17535,6 +17539,7 @@ var getEndpointFromInstructions = /* @__PURE__ */ __name(async (commandInput, in
     }
     if (endpointFromConfig) {
       clientConfig.endpoint = () => Promise.resolve(toEndpointV1(endpointFromConfig));
+      clientConfig.isCustomEndpoint = true;
     }
   }
   const endpointParams = await resolveParams(commandInput, instructionsSupplier, clientConfig);
diff --git a/dist/index.js b/dist/index.js
index 6a5a594..8db8931 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -17102,7 +17102,7 @@ var splitHeader = (value) => {
 };
 
 // src/submodules/serde/value/NumericValue.ts
-var NumericValue = class {
+var NumericValue = class _NumericValue {
   constructor(string, type) {
     this.string = string;
     this.type = type;
@@ -17129,15 +17129,19 @@ var NumericValue = class {
   toString() {
     return this.string;
   }
-  [Symbol.hasInstance](object) {
+  static [Symbol.hasInstance](object) {
     if (!object || typeof object !== "object") {
       return false;
     }
     const _nv = object;
+    const prototypeMatch = _NumericValue.prototype.isPrototypeOf(object.constructor?.prototype);
+    if (prototypeMatch) {
+      return prototypeMatch;
+    }
     if (typeof _nv.string === "string" && typeof _nv.type === "string" && _nv.constructor?.name === "NumericValue") {
       return true;
     }
-    return false;
+    return prototypeMatch;
   }
 };
 function nv(input) {
@@ -18236,6 +18240,7 @@ var getEndpointFromInstructions = /* @__PURE__ */ __name(async (commandInput, in
     }
     if (endpointFromConfig) {
       clientConfig.endpoint = () => Promise.resolve(toEndpointV1(endpointFromConfig));
+      clientConfig.isCustomEndpoint = true;
     }
   }
   const endpointParams = await resolveParams(commandInput, instructionsSupplier, clientConfig);