diff --git a/src/extensions/types.ts b/src/extensions/types.ts
index 62abf5df..2027fb09 100644
--- a/src/extensions/types.ts
+++ b/src/extensions/types.ts
@@ -191,6 +191,31 @@ export interface ExtensionContext {
   log(level: 'debug' | 'info' | 'warn' | 'error', message: string, ...args: any[]): void
 }
 
+/**
+ * HTTP route handler types
+ * Used by extensions that expose HTTP endpoints (e.g. LNURL, .well-known)
+ */
+export interface HttpRequest {
+  method: string
+  path: string
+  params: Record<string, string>
+  query: Record<string, string>
+  headers: Record<string, string>
+  body?: any
+}
+
+export interface HttpResponse {
+  status: number
+  body: any
+  headers?: Record<string, string>
+}
+
+export interface HttpRoute {
+  method: 'GET' | 'POST'
+  path: string
+  handler: (req: HttpRequest) => Promise<HttpResponse>
+}
+
 /**
  * Extension interface - what extensions must implement
  */
@@ -217,6 +242,12 @@ export interface Extension {
    * Return true if extension is healthy
    */
   healthCheck?(): Promise<boolean>
+
+  /**
+   * Get HTTP routes exposed by this extension
+   * The main HTTP server will mount these routes
+   */
+  getHttpRoutes?(): HttpRoute[]
 }
 
 /**