diff --git a/src/app/api/gateways/health/health-utils.test.ts b/src/app/api/gateways/health/health-utils.test.ts
index c1e330a..d7d079e 100644
--- a/src/app/api/gateways/health/health-utils.test.ts
+++ b/src/app/api/gateways/health/health-utils.test.ts
@@ -80,7 +80,7 @@ function buildGatewayProbeUrl(host: string, port: number): string | null {
       if (!parsed.port && Number.isFinite(port) && port > 0) {
         parsed.port = String(port)
       }
-      if (!parsed.pathname) parsed.pathname = '/'
+      parsed.pathname = parsed.pathname.replace(/\/+$/, '') + '/api/health'
       return parsed.toString()
     } catch {
       return null
@@ -88,7 +88,7 @@ function buildGatewayProbeUrl(host: string, port: number): string | null {
   }
 
   if (!Number.isFinite(port) || port <= 0) return null
-  return `http://${rawHost}:${port}/`
+  return `http://${rawHost}:${port}/api/health`
 }
 
 function parseGatewayVersion(headers: Record<string, string | null>): string | null {
@@ -180,7 +180,7 @@ describe('isBlockedUrl', () => {
 
 describe('buildGatewayProbeUrl', () => {
   it('builds URL from bare host + port', () => {
-    expect(buildGatewayProbeUrl('example.com', 8080)).toBe('http://example.com:8080/')
+    expect(buildGatewayProbeUrl('example.com', 8080)).toBe('http://example.com:8080/api/health')
   })
 
   it('preserves https:// protocol', () => {
diff --git a/src/app/api/gateways/health/route.ts b/src/app/api/gateways/health/route.ts
index 3f58d33..381637d 100644
--- a/src/app/api/gateways/health/route.ts
+++ b/src/app/api/gateways/health/route.ts
@@ -144,7 +144,7 @@ function buildGatewayProbeUrl(host: string, port: number): string | null {
       if (!parsed.port && Number.isFinite(port) && port > 0) {
         parsed.port = String(port)
       }
-      if (!parsed.pathname) parsed.pathname = '/'
+      parsed.pathname = parsed.pathname.replace(/\/+$/, '') + '/api/health'
       return parsed.toString()
     } catch {
       return null
@@ -152,7 +152,7 @@ function buildGatewayProbeUrl(host: string, port: number): string | null {
   }
 
   if (!Number.isFinite(port) || port <= 0) return null
-  return `http://${rawHost}:${port}/`
+  return `http://${rawHost}:${port}/api/health`
 }
 
 /**