diff --git a/src/services/relay/claudeConsoleRelayService.js b/src/services/relay/claudeConsoleRelayService.js
index 50c05275..a8590c52 100644
--- a/src/services/relay/claudeConsoleRelayService.js
+++ b/src/services/relay/claudeConsoleRelayService.js
@@ -1472,14 +1472,22 @@ class ClaudeConsoleRelayService {
         : `${cleanUrl}/v1/messages?beta=true`
       const payload = createClaudeTestPayload(model, { stream: true })
 
-      await sendStreamTestRequest({
+      const extraHeaders = account.userAgent ? { 'User-Agent': account.userAgent } : {}
+      const requestOptions = {
         apiUrl,
-        authorization: `Bearer ${account.apiKey}`,
         responseStream,
         payload,
         proxyAgent: claudeConsoleAccountService._createProxyAgent(account.proxy),
-        extraHeaders: account.userAgent ? { 'User-Agent': account.userAgent } : {}
-      })
+        extraHeaders
+      }
+
+      if (account.apiKey && account.apiKey.startsWith('sk-ant-')) {
+        requestOptions.extraHeaders['x-api-key'] = account.apiKey
+      } else {
+        requestOptions.authorization = `Bearer ${account.apiKey}`
+      }
+
+      await sendStreamTestRequest(requestOptions)
     } catch (error) {
       logger.error(`❌ Test account connection failed:`, error)
       if (!responseStream.headersSent) {
diff --git a/src/utils/testPayloadHelper.js b/src/utils/testPayloadHelper.js
index 4a2187b5..66df8305 100644
--- a/src/utils/testPayloadHelper.js
+++ b/src/utils/testPayloadHelper.js
@@ -146,7 +146,7 @@ async function sendStreamTestRequest(options) {
       'Content-Type': 'application/json',
       'anthropic-version': '2023-06-01',
       'User-Agent': 'claude-cli/2.0.52 (external, cli)',
-      authorization,
+      ...(authorization ? { authorization } : {}),
       ...extraHeaders
     },
     timeout,
diff --git a/tests/claudeConsoleRelayService.test.js b/tests/claudeConsoleRelayService.test.js
index 67dbfde4..a678a026 100644
--- a/tests/claudeConsoleRelayService.test.js
+++ b/tests/claudeConsoleRelayService.test.js
@@ -32,7 +32,7 @@ describe('claudeConsoleRelayService.testAccountConnection', () => {
     jest.clearAllMocks()
   })
 
-  it('passes selected model stream payload to sendStreamTestRequest', async () => {
+  it('passes selected model stream payload and bearer auth for non sk-ant key', async () => {
     claudeConsoleAccountService.getAccount.mockResolvedValue({
       name: 'Console A1',
       apiUrl: 'https://console.example.com',
@@ -55,8 +55,42 @@ describe('claudeConsoleRelayService.testAccountConnection', () => {
     expect(createClaudeTestPayload).toHaveBeenCalledWith('claude-sonnet-4-6', { stream: true })
     expect(sendStreamTestRequest).toHaveBeenCalledWith(
       expect.objectContaining({
-        payload
+        payload,
+        authorization: 'Bearer test-key'
       })
     )
   })
+
+  it('passes selected model stream payload and x-api-key for sk-ant key', async () => {
+    claudeConsoleAccountService.getAccount.mockResolvedValue({
+      name: 'Console A1',
+      apiUrl: 'https://console.example.com',
+      apiKey: 'sk-ant-test-key',
+      proxy: null,
+      userAgent: null
+    })
+    claudeConsoleAccountService._createProxyAgent.mockReturnValue(undefined)
+
+    const payload = {
+      model: 'claude-sonnet-4-6',
+      stream: true
+    }
+    createClaudeTestPayload.mockReturnValue(payload)
+    sendStreamTestRequest.mockResolvedValue(undefined)
+
+    const res = {}
+    await claudeConsoleRelayService.testAccountConnection('a1', res, 'claude-sonnet-4-6')
+
+    expect(createClaudeTestPayload).toHaveBeenCalledWith('claude-sonnet-4-6', { stream: true })
+    const requestOptions = sendStreamTestRequest.mock.calls[0][0]
+    expect(requestOptions).toEqual(
+      expect.objectContaining({
+        payload,
+        extraHeaders: expect.objectContaining({
+          'x-api-key': 'sk-ant-test-key'
+        })
+      })
+    )
+    expect(requestOptions).not.toHaveProperty('authorization')
+  })
 })