diff --git a/public/app.js b/public/app.js
index bd0f3ea..897b033 100644
--- a/public/app.js
+++ b/public/app.js
@@ -138,6 +138,7 @@ const els = {
   wavelogKeyInput: document.getElementById("wavelogKeyInput"),
   wavelogKeySaveBtn: document.getElementById("wavelogKeySaveBtn"),
   wavelogKeyMessage: document.getElementById("wavelogKeyMessage"),
+  wavelogInstanceLink: document.getElementById("wavelogInstanceLink"),
   openwebrxTxStatePill: document.getElementById("openwebrxTxStatePill"),
   rotorCurrent: document.getElementById("rotorCurrent"),
   rotorCompass: document.getElementById("rotorCompass"),
@@ -1505,6 +1506,7 @@ async function refreshCurrentUser() {
     const result = await api("/v1/me", { authRequired: true });
     state.user = result.user;
     state.wavelogApiKey = typeof result.wavelogApiKey === "string" ? result.wavelogApiKey : "";
+    state.wavelogBaseUrl = typeof result.wavelogBaseUrl === "string" ? result.wavelogBaseUrl : "";
     applyWavelogKeyToInput();
     renderUserSettingsAuthMethods();
     await ensureLanguageFromUserPreference();
@@ -1698,6 +1700,16 @@ function applyWavelogKeyToInput() {
   if (els.wavelogKeyInput) {
     els.wavelogKeyInput.value = String(state.wavelogApiKey || "");
   }
+  if (els.wavelogInstanceLink) {
+    const url = String(state.wavelogBaseUrl || "").trim();
+    if (url) {
+      els.wavelogInstanceLink.href = url;
+      els.wavelogInstanceLink.hidden = false;
+    } else {
+      els.wavelogInstanceLink.removeAttribute("href");
+      els.wavelogInstanceLink.hidden = true;
+    }
+  }
 }
 
 async function saveWavelogKey() {
@@ -1723,6 +1735,9 @@ async function openOpenWebRxSession() {
     const session = result && result.session ? result.session : null;
     if (result && typeof result.wavelogApiKey === "string") {
       state.wavelogApiKey = result.wavelogApiKey;
+      if (typeof result.wavelogBaseUrl === "string") {
+        state.wavelogBaseUrl = result.wavelogBaseUrl;
+      }
       applyWavelogKeyToInput();
     }
     const sessionTicket = session && session.ticket ? String(session.ticket) : "";
@@ -1752,6 +1767,9 @@ async function openOpenWebRxExternal() {
     const session = result && result.session ? result.session : null;
     if (result && typeof result.wavelogApiKey === "string") {
       state.wavelogApiKey = result.wavelogApiKey;
+      if (typeof result.wavelogBaseUrl === "string") {
+        state.wavelogBaseUrl = result.wavelogBaseUrl;
+      }
       applyWavelogKeyToInput();
     }
     const sessionTicket = session && session.ticket ? String(session.ticket) : "";
diff --git a/public/i18n/de.json b/public/i18n/de.json
index 30fd217..5da7f5a 100644
--- a/public/i18n/de.json
+++ b/public/i18n/de.json
@@ -56,6 +56,7 @@
     "Key speichern": "Key speichern",
     "Frequenz und Mode der Station werden beim Bandwechsel an dein Wavelog-Logbuch gesendet.": "Frequenz und Mode der Station werden beim Bandwechsel an dein Wavelog-Logbuch gesendet.",
     "Wavelog API Key gespeichert.": "Wavelog API Key gespeichert.",
+    "Wavelog öffnen": "Wavelog öffnen",
     "Reservierungen": "Reservierungen",
     "Naechsten Slot reservieren": "Naechsten Slot reservieren",
     "SWR Uebersicht": "SWR Uebersicht",
diff --git a/public/i18n/en.json b/public/i18n/en.json
index 6f5e4e7..9d98d70 100644
--- a/public/i18n/en.json
+++ b/public/i18n/en.json
@@ -56,6 +56,7 @@
     "Key speichern": "Save key",
     "Frequenz und Mode der Station werden beim Bandwechsel an dein Wavelog-Logbuch gesendet.": "The station's frequency and mode are sent to your Wavelog logbook on band change.",
     "Wavelog API Key gespeichert.": "Wavelog API key saved.",
+    "Wavelog öffnen": "Open Wavelog",
     "Reservierungen": "Reservations",
     "Naechsten Slot reservieren": "Reserve next slot",
     "SWR Uebersicht": "SWR Overview",
diff --git a/public/index.html b/public/index.html
index a26bf3a..df58f0e 100644
--- a/public/index.html
+++ b/public/index.html
@@ -167,7 +167,10 @@
                 <p class="muted">Session Key (Ticket): <code id="openwebrxSessionTicket">-</code></p>
               </div>
               <div id="wavelogKeyBox" class="stack">
-                <label for="wavelogKeyInput">Wavelog API Key (Rig-Key)</label>
+                <div class="section-head">
+                  <label for="wavelogKeyInput">Wavelog API Key (Rig-Key)</label>
+                  <a id="wavelogInstanceLink" target="_blank" rel="noopener noreferrer" hidden>Wavelog öffnen</a>
+                </div>
                 <input id="wavelogKeyInput" type="text" autocomplete="off" spellcheck="false" placeholder="Wavelog API Key" />
                 <div class="actions">
                   <button id="wavelogKeySaveBtn" type="button" class="ghost-btn">Key speichern</button>
diff --git a/server/index.js b/server/index.js
index 86e1fe0..11df935 100644
--- a/server/index.js
+++ b/server/index.js
@@ -360,7 +360,7 @@ async function routeRequest(req, res) {
     if (method === "GET" && url.pathname === "/v1/me") {
       const auth = requireAuth(req, res);
       if (!auth) return;
-      return sendJson(res, 200, { user: sanitizeUser(auth.user), wavelogApiKey: auth.user.wavelogApiKey || "", capabilities: userCapabilities(auth.user) });
+      return sendJson(res, 200, { user: sanitizeUser(auth.user), wavelogApiKey: auth.user.wavelogApiKey || "", wavelogBaseUrl: wavelogBaseUrlPublic(), capabilities: userCapabilities(auth.user) });
     }
 
     if (method === "GET" && url.pathname === "/v1/auth/session/diag") {
@@ -3641,7 +3641,8 @@ async function handleOpenWebRxSessionIssue(res, user) {
   return sendJson(res, 200, {
     ok: true,
     session: result,
-    wavelogApiKey: user.wavelogApiKey || ""
+    wavelogApiKey: user.wavelogApiKey || "",
+    wavelogBaseUrl: wavelogBaseUrlPublic()
   });
 }
 
@@ -3719,6 +3720,12 @@ async function handleOpenWebRxBandSelect(res, user, body) {
   }
 }
 
+// Public Wavelog base URL (for the UI link). Comes from runtime env only, so the
+// private hostname is never baked into this (public) repo.
+function wavelogBaseUrlPublic() {
+  return String(process.env.WAVELOG_BASE_URL || "").trim().replace(/\/+$/, "");
+}
+
 // Push a frequency/mode to the active operator's Wavelog logbook (CAT API).
 // Best-effort: never throws into the caller's flow.
 async function sendWavelogCat(user, frequencyHz, mode) {