diff --git a/chat-storage.js b/chat-storage.js
index 34d8438..a7254c2 100644
--- a/chat-storage.js
+++ b/chat-storage.js
@@ -360,21 +360,26 @@ document.addEventListener("DOMContentLoaded", () => {
         const width = Number(urlObj.searchParams.get('width')) || img.naturalWidth || 512;
         const height = Number(urlObj.searchParams.get('height')) || img.naturalHeight || 512;
         const model = urlObj.searchParams.get('model') || (document.getElementById('model-select')?.value || undefined);
-        let newUrl = img.src;
-        try {
-            if (window.polliLib && window.polliClient && prompt) {
-                newUrl = window.polliLib.mcp.generateImageUrl(window.polliClient, {
-                    prompt, width, height, seed: newSeed, nologo: true, model
-                });
-            } else {
-                urlObj.searchParams.set('seed', String(newSeed));
-                newUrl = urlObj.toString();
-            }
-        } catch (e) {
-            console.warn('polliLib generateImageUrl failed; falling back to seed swap', e);
-            urlObj.searchParams.set('seed', String(newSeed));
-            newUrl = urlObj.toString();
-        }
+        let newUrl = img.src;
+        try {
+            if (window.polliLib && window.polliClient && prompt) {
+                newUrl = window.polliLib.mcp.generateImageUrl(window.polliClient, {
+                    prompt, width, height, seed: newSeed, nologo: true, model
+                });
+            } else {
+                urlObj.searchParams.set('seed', String(newSeed));
+                newUrl = urlObj.toString();
+            }
+        } catch (e) {
+            console.warn('polliLib generateImageUrl failed; falling back to seed swap', e);
+            urlObj.searchParams.set('seed', String(newSeed));
+            newUrl = urlObj.toString();
+        }
+        const newUrlObj = new URL(newUrl);
+        if (!newUrlObj.searchParams.has('referrer') && window.polliClient?.referrer) {
+            newUrlObj.searchParams.set('referrer', window.polliClient.referrer); // retain referrer for API tiering
+        }
+        const finalUrl = newUrlObj.toString();
         const loadingDiv = document.createElement("div");
         loadingDiv.className = "ai-image-loading";
         const spinner = document.createElement("div");
@@ -396,8 +401,8 @@ document.addEventListener("DOMContentLoaded", () => {
             loadingDiv.style.alignItems = "center";
             showToast("Failed to refresh image");
         };
-        img.src = newUrl;
-    }
+        img.src = finalUrl;
+    }
     function openImageInNewTab(img, imageId) {
         console.log(`Opening image in new tab with ID: ${imageId}`);
         if (!img.src) {
diff --git a/simple.js b/simple.js
index b59cf9a..7459884 100644
--- a/simple.js
+++ b/simple.js
@@ -588,21 +588,26 @@ document.addEventListener("DOMContentLoaded", () => {
             const width = Number(urlObj.searchParams.get('width')) || img.naturalWidth || 512;
             const height = Number(urlObj.searchParams.get('height')) || img.naturalHeight || 512;
             const model = urlObj.searchParams.get('model') || (document.getElementById('model-select')?.value || undefined);
-            let newUrl = img.src;
-            try {
-                if (window.polliLib && window.polliClient && prompt) {
-                    newUrl = window.polliLib.mcp.generateImageUrl(window.polliClient, {
-                        prompt, width, height, seed: newSeed, nologo: true, model
-                    });
-                } else {
-                    urlObj.searchParams.set('seed', String(newSeed));
-                    newUrl = urlObj.toString();
-                }
-            } catch (e) {
-                console.warn('polliLib generateImageUrl failed; falling back to seed swap', e);
-                urlObj.searchParams.set('seed', String(newSeed));
-                newUrl = urlObj.toString();
-            }
+            let newUrl = img.src;
+            try {
+                if (window.polliLib && window.polliClient && prompt) {
+                    newUrl = window.polliLib.mcp.generateImageUrl(window.polliClient, {
+                        prompt, width, height, seed: newSeed, nologo: true, model
+                    });
+                } else {
+                    urlObj.searchParams.set('seed', String(newSeed));
+                    newUrl = urlObj.toString();
+                }
+            } catch (e) {
+                console.warn('polliLib generateImageUrl failed; falling back to seed swap', e);
+                urlObj.searchParams.set('seed', String(newSeed));
+                newUrl = urlObj.toString();
+            }
+            const newUrlObj = new URL(newUrl);
+            if (!newUrlObj.searchParams.has('referrer') && window.polliClient?.referrer) {
+                newUrlObj.searchParams.set('referrer', window.polliClient.referrer); // retain referrer for API tiering
+            }
+            const finalUrl = newUrlObj.toString();
 
             const loadingDiv = document.createElement("div");
             loadingDiv.className = "simple-ai-image-loading";
@@ -626,8 +631,8 @@ document.addEventListener("DOMContentLoaded", () => {
                 loadingDiv.style.alignItems = "center";
                 window.showToast("Failed to refresh image");
             };
-            img.src = newUrl;
-        }
+            img.src = finalUrl;
+        }
 
         function openImageInNewTab(img, imageId) {
             console.log(`Opening image in new tab with ID: ${imageId} in simple mode`);