diff --git a/.env.example b/.env.example
index 6c96c15..471a3c4 100644
--- a/.env.example
+++ b/.env.example
@@ -14,6 +14,7 @@ PUBLIC_SEARCH=no                       # yes | no — enable the search box (req
 PUBLIC_LABELS=                         # comma-separated discussion labels (e.g., bug,feature,question)
 PUBLIC_NOSTRCONNECT_RELAYS=            # comma-separated relays for nostrconnect:// (bunker) login; defaults to bucket.coracle.social,relay.primal.net
 PUBLIC_BLOSSOM_URL=                    # Blossom server URL for uploads (e.g., https://blossom.primal.net)
+PUBLIC_EXTERNAL_CLIENT=                # external client for profiles/events, {e} is the bech32 entity; default https://njump.me/{e}
 # Theme color overrides — quote the value, a leading # is read as a comment otherwise
 PUBLIC_ACCENT_COLOR=                   # override the accent color (default #e32a6d), e.g. "#00ff00"; hover shade derived
 PUBLIC_SECONDARY_COLOR=                # override the secondary color (default #ffaf25), e.g. "#0000ff"; hover shade derived
diff --git a/README.md b/README.md
index bb279b2..99566c5 100644
--- a/README.md
+++ b/README.md
@@ -34,6 +34,7 @@ Squalk is configured entirely through environment variables (all prefixed `PUBLI
 | `PUBLIC_SEARCH` | no | `no` | `yes` to show a search box at the top of the homepage. Requires a relay with NIP-50 search support. |
 | `PUBLIC_LABELS` | no | — | Comma-separated discussion labels offered when composing, e.g. `bug,feature,question`. |
 | `PUBLIC_BLOSSOM_URL` | no | — | Blossom server URL used for media uploads, e.g. `https://blossom.primal.net`. Uploads are disabled when unset. |
+| `PUBLIC_EXTERNAL_CLIENT` | no | `https://njump.me/{e}` | URL template of the external Nostr client used to open profiles and events outside the forum. `{e}` is replaced with the bech32 entity (npub, nevent, naddr), e.g. `https://nostr.at/{e}`. |
 | `PUBLIC_ACCENT_COLOR` | no | `#e32a6d` | Override the accent (primary) color. Quote the value (`"#00ff00"`) — an unquoted leading `#` is read as a comment. The hover shade is derived automatically. |
 | `PUBLIC_SECONDARY_COLOR` | no | `#ffaf25` | Override the secondary color. Same quoting rule and derived hover shade as above. |
 
diff --git a/src/lib/components/PostContent.svelte b/src/lib/components/PostContent.svelte
index 2dbd18b..66a0db1 100644
--- a/src/lib/components/PostContent.svelte
+++ b/src/lib/components/PostContent.svelte
@@ -2,6 +2,7 @@
   import { loadNostrUser, type NostrUser } from "$lib/gadgets";
   import * as nip19 from "@nostr/tools/nip19";
   import { profilePath } from "$lib/forum/profiles";
+  import { externalLink } from "$lib/config";
   import {
     resolveThreadRef,
     threadRefHref,
@@ -311,7 +312,7 @@
       const entity = dest.slice(6).toLowerCase();
       try {
         nip19.decode(entity);
-        return { type: "link", href: `https://njump.me/${entity}`, label };
+        return { type: "link", href: externalLink(entity), label };
       } catch {
         return { type: "text", value: label };
       }
@@ -642,7 +643,7 @@
         >
       {:else}
         <a
-          href="https://njump.me/{inline.entity}"
+          href={externalLink(inline.entity)}
           target="_blank"
           rel="noopener noreferrer"
           class="text-accent break-all hover:underline">{inline.label}</a
diff --git a/src/lib/config.ts b/src/lib/config.ts
index 3f7f4c2..9599b7f 100644
--- a/src/lib/config.ts
+++ b/src/lib/config.ts
@@ -73,3 +73,20 @@ export const FAVICON =
     encodeURIComponent(
       `<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 32 32"><path fill-rule="evenodd" fill="${ACCENT_COLOR || DEFAULT_ACCENT}" d="M16 0a16 16 0 1 0 0 32a16 16 0 1 0 0-32zM16 8a8 8 0 1 1 0 16a8 8 0 1 1 0-16z"/></svg>`,
     );
+
+// External Nostr client used to open events and profiles that live outside
+// the forum. {e} is replaced with the bech32 entity (npub, nevent, naddr...).
+const DEFAULT_EXTERNAL_CLIENT = "https://njump.me/{e}";
+export const EXTERNAL_CLIENT = env.PUBLIC_EXTERNAL_CLIENT?.includes("{e}")
+  ? env.PUBLIC_EXTERNAL_CLIENT
+  : DEFAULT_EXTERNAL_CLIENT;
+export const EXTERNAL_CLIENT_NAME = (() => {
+  try {
+    return new URL(EXTERNAL_CLIENT.replace("{e}", "x")).hostname;
+  } catch {
+    return "external client";
+  }
+})();
+export function externalLink(entity: string): string {
+  return EXTERNAL_CLIENT.replace("{e}", entity);
+}
diff --git a/src/lib/linkify.ts b/src/lib/linkify.ts
index abc3117..4ffbe36 100644
--- a/src/lib/linkify.ts
+++ b/src/lib/linkify.ts
@@ -1,5 +1,5 @@
 import * as nip19 from "@nostr/tools/nip19";
-import { RELAY_URL } from "./config";
+import { RELAY_URL, externalLink } from "./config";
 
 // Curated TLD list: gTLDs, popular new gTLDs, common ccTLDs
 const TLDS = [
@@ -157,7 +157,7 @@ function decodeEntity(entity: string): ChatToken | null {
       return {
         type: "entity",
         entity,
-        href: `https://njump.me/${entity}`,
+        href: externalLink(entity),
         label: shortNostrEntity(entity),
         id: decoded.type === "note" ? decoded.data : decoded.data.id,
       };
@@ -165,7 +165,7 @@ function decodeEntity(entity: string): ChatToken | null {
       return {
         type: "entity",
         entity,
-        href: `https://njump.me/${entity}`,
+        href: externalLink(entity),
         label: shortNostrEntity(entity),
       };
   } catch {
diff --git a/src/routes/profile/[id]/+page.svelte b/src/routes/profile/[id]/+page.svelte
index 42b7ebc..b23f953 100644
--- a/src/routes/profile/[id]/+page.svelte
+++ b/src/routes/profile/[id]/+page.svelte
@@ -1,6 +1,6 @@
 <script lang="ts">
   import { page } from "$app/state";
-  import { MODE } from "$lib/config";
+  import { MODE, EXTERNAL_CLIENT_NAME, externalLink } from "$lib/config";
   import { getGroupName } from "$lib/group.svelte";
   import { groupsStore } from "$lib/groups.svelte";
   import {
@@ -235,12 +235,12 @@
             </span>
           {/if}
           <a
-            href="https://njump.me/{npub}"
+            href={externalLink(npub)}
             target="_blank"
             rel="noopener noreferrer"
             class="text-accent text-sm hover:underline"
           >
-            View on njump ↗
+            View on {EXTERNAL_CLIENT_NAME} ↗
           </a>
         </div>