diff --git a/openidm-servlet/src/main/java/org/forgerock/openidm/ui/internal/service/ResourceServlet.java b/openidm-servlet/src/main/java/org/forgerock/openidm/ui/internal/service/ResourceServlet.java
index c9702b57ca..49ce07eb5d 100644
--- a/openidm-servlet/src/main/java/org/forgerock/openidm/ui/internal/service/ResourceServlet.java
+++ b/openidm-servlet/src/main/java/org/forgerock/openidm/ui/internal/service/ResourceServlet.java
@@ -15,7 +15,7 @@
  * limitations under the License.
  *
  * Portions copyright 2013-2015 ForgeRock AS.
- * Portions Copyrighted 2024-2025 3A Systems LLC.
+ * Portions Copyrighted 2024-2026 3A Systems LLC.
  */
 package org.forgerock.openidm.ui.internal.service;
 
@@ -25,6 +25,7 @@
 import java.io.OutputStream;
 import java.net.URL;
 import java.net.URLConnection;
+import java.nio.charset.StandardCharsets;
 import java.util.Dictionary;
 import java.util.Hashtable;
 import java.util.Map;
@@ -38,6 +39,7 @@
 import org.forgerock.openidm.config.enhanced.EnhancedConfig;
 import org.forgerock.openidm.core.IdentityServer;
 import org.forgerock.openidm.core.PropertyUtil;
+import org.forgerock.openidm.core.ServerConstants;
 import org.forgerock.openidm.servletregistration.ServletRegistration;
 import org.ops4j.pax.web.service.WebContainer;
 import org.osgi.service.component.ComponentContext;
@@ -129,6 +131,7 @@ protected void doGet(HttpServletRequest req, HttpServletResponse res)
             }
 
             // Never cache index.html to ensure we always have the current product version for asset requests
+            // (Cache-Control is also set in handleIndexHtml for the index.html special case)
             if (target.equals("/index.html")) {
                 res.setHeader("Cache-Control", "no-cache");
             }
@@ -157,12 +160,53 @@ protected void doGet(HttpServletRequest req, HttpServletResponse res)
 
             if (url == null) {
                 res.sendError(HttpServletResponse.SC_NOT_FOUND);
+            } else if (target.equals("/index.html")) {
+                handleIndexHtml(res, url);
             } else {
                 handle(req, res, url, target);
             }
         }
     }
 
+    /**
+     * Serves index.html with the openidm.context.path injected as a global JS variable.
+     * Replaces {@code </head>} with a small inline script that sets
+     * {@code window.__openidm_context_path} before RequireJS boots.
+     */
+    private void handleIndexHtml(HttpServletResponse res, URL url) throws IOException {
+        res.setContentType("text/html");
+        res.setHeader("Cache-Control", "no-cache");
+
+        String contextPath = System.getProperty(
+                ServerConstants.OPENIDM_CONTEXT_PATH_PROPERTY,
+                ServerConstants.OPENIDM_CONTEXT_PATH_DEFAULT);
+        // Strip leading slash — the UI Constants.context value does not use it
+        String contextValue = contextPath.startsWith("/") ? contextPath.substring(1) : contextPath;
+
+        byte[] raw;
+        try (InputStream is = url.openStream()) {
+            raw = is.readAllBytes();
+        }
+        String html = new String(raw, StandardCharsets.UTF_8);
+
+        // Inject a tiny script right before </head> so it is available before RequireJS loads.
+        // Escape characters that could break out of the JS string or the script tag.
+        String safeContextValue = contextValue
+                .replace("&", "&amp;")
+                .replace("<", "\\u003c")
+                .replace(">", "\\u003e")
+                .replace("\"", "\\\"")
+                .replace("'", "\\'");
+        String injection = "<script>window.__openidm_context_path=\""
+                + safeContextValue + "\";</script>\n</head>";
+        // replaceFirst to guard against malformed HTML with multiple </head> tags
+        html = html.replaceFirst("</head>", injection);
+
+        byte[] out = html.getBytes(StandardCharsets.UTF_8);
+        res.setContentLength(out.length);
+        res.getOutputStream().write(out);
+    }
+
     /**
      * Initializes the servlet and registers it with the WebContainer.
      * 
diff --git a/openidm-ui/openidm-ui-api/src/main/resources/index.html b/openidm-ui/openidm-ui-api/src/main/resources/index.html
index bfa7a784c8..58e3f76f6d 100755
--- a/openidm-ui/openidm-ui-api/src/main/resources/index.html
+++ b/openidm-ui/openidm-ui-api/src/main/resources/index.html
@@ -51,7 +51,8 @@
                 url = decodeURIComponent(url[1]);
             } else {
                 // default Swagger JSON URL
-                url = "/openidm/?_api";
+                var ctx = (window.__openidm_context_path || "openidm");
+                url = "/" + ctx + "/?_api";
             }
 
             if (window.SwaggerTranslator) {
diff --git a/openidm-ui/openidm-ui-common/src/main/js/org/forgerock/openidm/ui/common/util/Constants.js b/openidm-ui/openidm-ui-common/src/main/js/org/forgerock/openidm/ui/common/util/Constants.js
index db45bdb12a..6f8c3585f9 100644
--- a/openidm-ui/openidm-ui-common/src/main/js/org/forgerock/openidm/ui/common/util/Constants.js
+++ b/openidm-ui/openidm-ui-common/src/main/js/org/forgerock/openidm/ui/common/util/Constants.js
@@ -12,12 +12,15 @@
  * information: "Portions copyright [year] [name of copyright owner]".
  *
  * Copyright 2016 ForgeRock AS.
+ * Portions Copyright 2026 3A Systems, LLC.
  */
 
 define([
     "org/forgerock/commons/ui/common/util/Constants"
 ], function (commonConstants) {
-    commonConstants.context = "openidm";
+    commonConstants.context = (typeof window !== "undefined" && window.__openidm_context_path)
+        ? window.__openidm_context_path
+        : "openidm";
 
     commonConstants.HEADER_PARAM_PASSWORD = "X-OpenIDM-Password";
     commonConstants.HEADER_PARAM_USERNAME = "X-OpenIDM-Username";
diff --git a/openidm-ui/openidm-ui-common/src/test/qunit/tests/org/forgerock/openidm/ui/common/util/ConstantsTest.js b/openidm-ui/openidm-ui-common/src/test/qunit/tests/org/forgerock/openidm/ui/common/util/ConstantsTest.js
index 3e9e7c24f0..33963938d4 100644
--- a/openidm-ui/openidm-ui-common/src/test/qunit/tests/org/forgerock/openidm/ui/common/util/ConstantsTest.js
+++ b/openidm-ui/openidm-ui-common/src/test/qunit/tests/org/forgerock/openidm/ui/common/util/ConstantsTest.js
@@ -23,4 +23,28 @@ define([
             "Custom context should produce the correct REST API path prefix");
         Constants.context = originalContext;
     });
-});
\ No newline at end of file
+
+    QUnit.test("window.__openidm_context_path overrides the default context", function (assert) {
+        var originalValue = window.__openidm_context_path;
+        window.__openidm_context_path = "myidm";
+        var contextValue = (typeof window !== "undefined" && window.__openidm_context_path)
+            ? window.__openidm_context_path
+            : "openidm";
+        assert.equal(contextValue, "myidm",
+            "window.__openidm_context_path should override the default 'openidm' context");
+        window.__openidm_context_path = originalValue;
+    });
+
+    QUnit.test("window.__openidm_context_path falls back to 'openidm' when unset", function (assert) {
+        var originalValue = window.__openidm_context_path;
+        delete window.__openidm_context_path;
+        var contextValue = (typeof window !== "undefined" && window.__openidm_context_path)
+            ? window.__openidm_context_path
+            : "openidm";
+        assert.equal(contextValue, "openidm",
+            "Should fall back to 'openidm' when window.__openidm_context_path is not set");
+        if (originalValue !== undefined) {
+            window.__openidm_context_path = originalValue;
+        }
+    });
+});