diff --git a/browser/templates/_types/order/_items.html b/browser/templates/_types/order/_items.html
index fdf0a0c..27b2a9f 100644
--- a/browser/templates/_types/order/_items.html
+++ b/browser/templates/_types/order/_items.html
@@ -7,7 +7,7 @@
       <ul class="divide-y divide-stone-100 text-xs sm:text-sm">
         {% for item in order.items %}
           <li>
-            <a class="w-full py-2 flex gap-3" href="{{ market_url('/product/' + item.product.slug + '/') }}">
+            <a class="w-full py-2 flex gap-3" href="{{ market_product_url(item.product.slug) }}">
               {# Thumbnail #}
               <div class="w-12 h-12 sm:w-14 sm:h-14 rounded-md bg-stone-100 flex-shrink-0 overflow-hidden">
                 {% if item.product and item.product.image %}
diff --git a/browser/templates/_types/product/_cart.html b/browser/templates/_types/product/_cart.html
index dfdb6c1..1f173aa 100644
--- a/browser/templates/_types/product/_cart.html
+++ b/browser/templates/_types/product/_cart.html
@@ -7,9 +7,9 @@
   
   {% if not quantity %}
     <form
-      action="{{ market_url('/product/' + slug + '/cart') }}"
+      action="{{ market_product_url(slug, 'cart') }}"
       method="post"
-      hx-post="{{ market_url('/product/' + slug + '/cart') }}"
+      hx-post="{{ market_product_url(slug, 'cart') }}"
       hx-target="#cart-mini"
       hx-swap="outerHTML"
       class="rounded flex items-center"
@@ -38,9 +38,9 @@
     <div class="rounded flex items-center gap-2">
       <!-- minus -->
       <form
-        action="{{ market_url('/product/' + slug + '/cart') }}"
+        action="{{ market_product_url(slug, 'cart') }}"
         method="post"
-        hx-post="{{ market_url('/product/' + slug + '/cart') }}"
+        hx-post="{{ market_product_url(slug, 'cart') }}"
         hx-target="#cart-mini"
         hx-swap="outerHTML"
       >
@@ -80,9 +80,9 @@
 
       <!-- plus -->
       <form
-        action="{{ market_url('/product/' + slug + '/cart') }}"
+        action="{{ market_product_url(slug, 'cart') }}"
         method="post"
-        hx-post="{{ market_url('/product/' + slug + '/cart') }}"
+        hx-post="{{ market_product_url(slug, 'cart') }}"
         hx-target="#cart-mini"
         hx-swap="outerHTML"
       >
@@ -139,7 +139,7 @@
       <div class="flex flex-col sm:flex-row sm:items-start justify-between gap-2 sm:gap-3">
         <div class="min-w-0">
           <h2 class="text-sm sm:text-base md:text-lg font-semibold text-stone-900">
-            {% set href=market_url('/product/' + p.slug + '/') %}
+            {% set href=market_product_url(p.slug, market_place=item.market_place) %}
             <a
               href="{{ href }}"
               hx_get="{{href}}"
@@ -189,9 +189,9 @@
         <div class="flex items-center gap-2 text-xs sm:text-sm text-stone-700">
           <span class="text-[0.65rem] sm:text-xs uppercase tracking-wide text-stone-500">Quantity</span>
           <form
-            action="{{ market_url('/product/' + p.slug + '/cart') }}"
+            action="{{ market_product_url(p.slug, 'cart', item.market_place) }}"
             method="post"
-            hx-post="{{ market_url('/product/' + p.slug + '/cart') }}"
+            hx-post="{{ market_product_url(p.slug, 'cart', item.market_place) }}"
             hx-target="#cart-mini"
             hx-swap="outerHTML"
           >
@@ -212,9 +212,9 @@
             {{ item.quantity }}
           </span>
           <form
-            action="{{ market_url('/product/' + p.slug + '/cart') }}"
+            action="{{ market_product_url(p.slug, 'cart', item.market_place) }}"
             method="post"
-            hx-post="{{ market_url('/product/' + p.slug + '/cart') }}"
+            hx-post="{{ market_product_url(p.slug, 'cart', item.market_place) }}"
             hx-target="#cart-mini"
             hx-swap="outerHTML"
           >
diff --git a/infrastructure/jinja_setup.py b/infrastructure/jinja_setup.py
index 2317e0d..14acd5d 100644
--- a/infrastructure/jinja_setup.py
+++ b/infrastructure/jinja_setup.py
@@ -13,7 +13,7 @@ from shared.browser.app.csrf import generate_csrf_token
 from shared.browser.app.authz import has_access
 from shared.browser.app.filters import register as register_filters
 
-from .urls import coop_url, market_url, cart_url, events_url, login_url, page_cart_url
+from .urls import coop_url, market_url, cart_url, events_url, login_url, page_cart_url, market_product_url
 
 
 def setup_jinja(app: Quart) -> None:
@@ -94,6 +94,7 @@ def setup_jinja(app: Quart) -> None:
     app.jinja_env.globals["events_url"] = events_url
     app.jinja_env.globals["login_url"] = login_url
     app.jinja_env.globals["page_cart_url"] = page_cart_url
+    app.jinja_env.globals["market_product_url"] = market_product_url
 
     # register jinja filters
     register_filters(app)
diff --git a/infrastructure/urls.py b/infrastructure/urls.py
index a753689..ef1e85e 100644
--- a/infrastructure/urls.py
+++ b/infrastructure/urls.py
@@ -43,6 +43,24 @@ def page_cart_url(page_slug: str, path: str = "/") -> str:
     return cart_url(f"/{page_slug}{path}")
 
 
+def market_product_url(product_slug: str, suffix: str = "", market_place=None) -> str:
+    """Build a market product URL with the correct page/market prefix.
+
+    Resolves the prefix from:
+      - market app context: g.post_slug + g.market_slug
+      - cart app context:   g.page_slug + market_place.slug
+    """
+    from quart import g
+
+    page_slug = getattr(g, "post_slug", None) or getattr(g, "page_slug", None)
+    ms = getattr(g, "market_slug", None) or (
+        getattr(market_place, "slug", None) if market_place else None
+    )
+    prefix = f"/{page_slug}/{ms}" if page_slug and ms else ""
+    tail = f"/{suffix}" if suffix else "/"
+    return market_url(f"{prefix}/product/{product_slug}{tail}")
+
+
 def login_url(next_url: str = "") -> str:
     if next_url:
         return coop_url(f"/auth/login/?next={quote(next_url, safe='')}")