diff --git a/.env.example b/.env.example
index f391615..36a0250 100644
--- a/.env.example
+++ b/.env.example
@@ -12,6 +12,10 @@ NEXT_PUBLIC_MANIFEST_RESOURCE_URI="resource.ttl"
 # Admin WebID used for booting the demo (replace with your WebID)
 NEXT_PUBLIC_ADMIN_WEBID="https://id.inrupt.com/your-webid"
 
+# OIDC issuer URL for authentication
+# Default Inrupt provider, can be changed to other Solid-compatible providers
+NEXT_PUBLIC_OIDC_ISSUER="https://login.inrupt.com"
+
 # Notes:
 # - Never commit secrets. This file is safe to commit because it contains placeholders only.
 # - For private credentials (if any), keep them in `.env` or `.env.local` which are ignored by git.
diff --git a/src/Config.ts b/src/Config.ts
index 54da619..003bba5 100644
--- a/src/Config.ts
+++ b/src/Config.ts
@@ -32,4 +32,13 @@ export class Config {
 
         return value;
     }
+
+    public static get oidcIssuer(): string {
+        const value = process.env.NEXT_PUBLIC_OIDC_ISSUER;
+        if (value === undefined) {
+            throw new Error(`${errorTemplate}NEXT_PUBLIC_OIDC_ISSUER`);
+        }
+
+        return value;
+    }
 }
diff --git a/src/components/ui/ListEditor.tsx b/src/components/ui/ListEditor.tsx
index 2db981e..4586bf5 100644
--- a/src/components/ui/ListEditor.tsx
+++ b/src/components/ui/ListEditor.tsx
@@ -178,7 +178,7 @@ export function ListEditor() {
             console.log("unauthenticated");
 
             await login({
-                oidcIssuer: "https://login.inrupt.com", // TODO: config
+                oidcIssuer: Config.oidcIssuer,
                 clientName: "My application",
             });
         }