diff --git a/src/features/providers/descriptors.ts b/src/features/providers/descriptors.ts
index a7e7c25..f023f66 100644
--- a/src/features/providers/descriptors.ts
+++ b/src/features/providers/descriptors.ts
@@ -76,7 +76,7 @@ export const PROVIDER_DESCRIPTORS: Record<ProviderBrand, ProviderDescriptor> = {
     supportsHeaders: true,
     supportsExcludedModels: true,
     supportsPriority: true,
-    supportsTestModel: false,
+    supportsTestModel: true,
     supportsWebsockets: false,
     supportsCloak: true,
     supportsApiKeyEntries: false,
diff --git a/src/features/providers/sheets/forms/BaseProviderForm.tsx b/src/features/providers/sheets/forms/BaseProviderForm.tsx
index 1624f48..0ba8c0a 100644
--- a/src/features/providers/sheets/forms/BaseProviderForm.tsx
+++ b/src/features/providers/sheets/forms/BaseProviderForm.tsx
@@ -1,6 +1,12 @@
 import { useId, useMemo, useState } from 'react';
 import { useTranslation } from 'react-i18next';
-import { IconPlus, IconX } from '@/components/ui/icons';
+import {
+  IconAlertTriangle,
+  IconCheckCircle2,
+  IconLoader2,
+  IconPlus,
+  IconX,
+} from '@/components/ui/icons';
 import { Collapsible } from '@/components/ui/Collapsible';
 import { hasDisableAllModelsRule } from '@/components/providers/utils';
 import type {
@@ -16,6 +22,11 @@ import type {
   ProviderEntryFormInput,
   ProviderResource,
 } from '../../types';
+import {
+  useConnectivityTest,
+  type ConnectivityErrorMessages,
+  type ConnectivityState,
+} from './useConnectivityTest';
 import styles from './sharedForm.module.scss';
 
 export interface BaseProviderFormHandle {
@@ -70,7 +81,8 @@ function buildInitialForm(
         brand === 'claude'
           ? { mode: '', strictMode: false, sensitiveWordsText: '' }
           : undefined,
-      testModel: brand === 'openaiCompatibility' ? '' : undefined,
+      testModel:
+        brand === 'openaiCompatibility' || brand === 'claude' ? '' : undefined,
       apiKeyEntries:
         brand === 'openaiCompatibility' ? [emptyApiKeyEntry()] : undefined,
     };
@@ -144,9 +156,35 @@ function buildInitialForm(
               (cfg as ProviderKeyConfig).cloak?.sensitiveWords?.join('\n') ?? '',
           }
         : undefined,
+    testModel: brand === 'claude' ? '' : undefined,
   };
 }
 
+function ConnectivityStatusIcon({ state }: { state: ConnectivityState }) {
+  if (state === 'loading') {
+    return (
+      <span className={`${styles.statusIcon} ${styles.statusIconLoading}`}>
+        <IconLoader2 size={14} />
+      </span>
+    );
+  }
+  if (state === 'success') {
+    return (
+      <span className={`${styles.statusIcon} ${styles.statusIconSuccess}`}>
+        <IconCheckCircle2 size={14} />
+      </span>
+    );
+  }
+  if (state === 'error') {
+    return (
+      <span className={`${styles.statusIcon} ${styles.statusIconError}`}>
+        <IconAlertTriangle size={14} />
+      </span>
+    );
+  }
+  return null;
+}
+
 export function BaseProviderForm({
   brand,
   resource,
@@ -163,6 +201,38 @@ export function BaseProviderForm({
   );
   const [error, setError] = useState<string | null>(null);
 
+  const fallbackApiKey = useMemo(() => {
+    if (brand !== 'claude' || mode !== 'edit' || !resource) return '';
+    return (resource.raw as ProviderKeyConfig | undefined)?.apiKey ?? '';
+  }, [brand, mode, resource]);
+
+  const connectivityMessages = useMemo<ConnectivityErrorMessages>(
+    () => ({
+      baseUrlRequired: t('providersPage.connectivity.baseUrlRequired'),
+      endpointInvalid: t('providersPage.connectivity.endpointInvalid'),
+      apiKeyRequired: t('providersPage.connectivity.apiKeyRequired'),
+      modelRequired: t('providersPage.connectivity.modelRequired'),
+      timeout: (seconds: number) =>
+        t('providersPage.connectivity.timeout', { seconds }),
+      requestFailed: t('providersPage.connectivity.requestFailed'),
+    }),
+    [t]
+  );
+
+  const connectivity = useConnectivityTest(
+    {
+      brand,
+      baseUrl: form.baseUrl,
+      testModel: form.testModel,
+      models: form.models,
+      formHeaders: form.headers,
+      apiKeyEntries: form.apiKeyEntries,
+      apiKey: form.apiKey,
+      fallbackApiKey,
+    },
+    connectivityMessages
+  );
+
   const updateField = <K extends keyof ProviderEntryFormInput>(
     key: K,
     value: ProviderEntryFormInput[K]
@@ -359,6 +429,12 @@ export function BaseProviderForm({
           <div className={styles.field}>
             <label className={styles.label} htmlFor={`${fid}-testModel`}>
               {t('providersPage.form.testModel')}
+              {brand === 'claude' ? (
+                <span className={styles.labelHint}>
+                  {' '}
+                  · {t('providersPage.form.testModelClaudeHint')}
+                </span>
+              ) : null}
             </label>
             <input
               id={`${fid}-testModel`}
@@ -367,6 +443,34 @@ export function BaseProviderForm({
               onChange={(e) => updateField('testModel', e.target.value)}
               disabled={mutating}
             />
+            {brand === 'claude' ? (
+              <div className={styles.connectivityRow}>
+                <button
+                  type="button"
+                  className={styles.connectivityBtn}
+                  disabled={mutating || connectivity.isTestingAny}
+                  onClick={() => void connectivity.runClaude()}
+                >
+                  {connectivity.claudeStatus.state === 'loading' ? (
+                    <span className={`${styles.statusIcon} ${styles.statusIconLoading}`}>
+                      <IconLoader2 size={14} />
+                    </span>
+                  ) : null}
+                  <span>{t('providersPage.connectivity.test')}</span>
+                </button>
+                <ConnectivityStatusIcon state={connectivity.claudeStatus.state} />
+                {connectivity.claudeStatus.state === 'success' ? (
+                  <span className={styles.connectivityHintSuccess}>
+                    {t('providersPage.connectivity.success')}
+                  </span>
+                ) : null}
+              </div>
+            ) : null}
+            {brand === 'claude' && connectivity.claudeStatus.state === 'error' ? (
+              <div className={styles.connectivityError}>
+                {connectivity.claudeStatus.message}
+              </div>
+            ) : null}
           </div>
         ) : null}
 
@@ -410,91 +514,133 @@ export function BaseProviderForm({
           defaultOpen
         >
           <div className={styles.entriesList}>
-            {apiKeyEntries.map((entry, idx) => (
-              <div key={idx} className={styles.entryCard}>
-                <div className={styles.entryCardHeader}>
-                  <span>
-                    {t('providersPage.form.apiKeyEntry', { index: idx + 1 })}
+            <div className={styles.entriesToolbar}>
+              <button
+                type="button"
+                className={styles.connectivityBtn}
+                disabled={mutating || connectivity.isTestingAny}
+                onClick={() => void connectivity.runOpenAIAllKeys()}
+              >
+                {connectivity.isTestingAny ? (
+                  <span className={`${styles.statusIcon} ${styles.statusIconLoading}`}>
+                    <IconLoader2 size={14} />
                   </span>
-                  <button
-                    type="button"
-                    className={styles.removeBtn}
-                    disabled={mutating || apiKeyEntries.length <= 1}
-                    onClick={() =>
-                      updateField(
-                        'apiKeyEntries',
-                        apiKeyEntries.filter((_, i) => i !== idx)
-                      )
-                    }
-                  >
-                    <IconX size={12} />
-                  </button>
-                </div>
-                <div className={styles.field}>
-                  <label className={styles.label}>
-                    {t('providersPage.form.apiKey')}
-                  </label>
-                  <input
-                    className={styles.input}
-                    type="password"
-                    value={entry.apiKey}
-                    onChange={(e) =>
-                      updateField(
-                        'apiKeyEntries',
-                        apiKeyEntries.map((it, i) =>
-                          i === idx ? { ...it, apiKey: e.target.value } : it
-                        )
-                      )
-                    }
-                    disabled={mutating}
-                    placeholder={t('providersPage.form.apiKeyCreatePlaceholder')}
-                  />
-                </div>
-                <div className={styles.field}>
-                  <label className={styles.label}>
-                    {t('providersPage.form.proxyUrl')}
-                  </label>
-                  <input
-                    className={styles.input}
-                    value={entry.proxyUrl}
-                    onChange={(e) =>
-                      updateField(
-                        'apiKeyEntries',
-                        apiKeyEntries.map((it, i) =>
-                          i === idx ? { ...it, proxyUrl: e.target.value } : it
-                        )
-                      )
-                    }
-                    disabled={mutating}
-                    placeholder="http://127.0.0.1:7890"
-                  />
-                </div>
-                <div className={styles.field}>
-                  <label className={styles.label}>
-                    {t('providersPage.form.headers')}
-                    <span className={styles.labelHint}>
-                      {' '}
-                      · {t('providersPage.form.headersHint')}
+                ) : null}
+                <span>{t('providersPage.connectivity.testAll')}</span>
+              </button>
+            </div>
+            {apiKeyEntries.map((entry, idx) => {
+              const status = connectivity.openaiStatuses[idx] ?? {
+                state: 'idle' as ConnectivityState,
+                message: '',
+              };
+              return (
+                <div key={idx} className={styles.entryCard}>
+                  <div className={styles.entryCardHeader}>
+                    <span>
+                      {t('providersPage.form.apiKeyEntry', { index: idx + 1 })}
                     </span>
-                  </label>
-                  <textarea
-                    className={styles.textarea}
-                    value={entry.headersText}
-                    rows={3}
-                    onChange={(e) =>
-                      updateField(
-                        'apiKeyEntries',
-                        apiKeyEntries.map((it, i) =>
-                          i === idx ? { ...it, headersText: e.target.value } : it
+                    <div className={styles.entryCardHeaderRight}>
+                      <ConnectivityStatusIcon state={status.state} />
+                      <button
+                        type="button"
+                        className={styles.connectivityBtnGhost}
+                        disabled={mutating || status.state === 'loading'}
+                        onClick={() => void connectivity.runOpenAIKey(idx)}
+                      >
+                        {status.state === 'loading' ? (
+                          <span className={`${styles.statusIcon} ${styles.statusIconLoading}`}>
+                            <IconLoader2 size={14} />
+                          </span>
+                        ) : null}
+                        <span>{t('providersPage.connectivity.test')}</span>
+                      </button>
+                      <button
+                        type="button"
+                        className={styles.removeBtn}
+                        disabled={mutating || apiKeyEntries.length <= 1}
+                        onClick={() =>
+                          updateField(
+                            'apiKeyEntries',
+                            apiKeyEntries.filter((_, i) => i !== idx)
+                          )
+                        }
+                      >
+                        <IconX size={12} />
+                      </button>
+                    </div>
+                  </div>
+                  <div className={styles.field}>
+                    <label className={styles.label}>
+                      {t('providersPage.form.apiKey')}
+                    </label>
+                    <input
+                      className={styles.input}
+                      type="password"
+                      value={entry.apiKey}
+                      onChange={(e) =>
+                        updateField(
+                          'apiKeyEntries',
+                          apiKeyEntries.map((it, i) =>
+                            i === idx ? { ...it, apiKey: e.target.value } : it
+                          )
                         )
-                      )
-                    }
-                    disabled={mutating}
-                    placeholder="X-Custom-Header: value"
-                  />
+                      }
+                      disabled={mutating}
+                      placeholder={t('providersPage.form.apiKeyCreatePlaceholder')}
+                    />
+                  </div>
+                  <div className={styles.field}>
+                    <label className={styles.label}>
+                      {t('providersPage.form.proxyUrl')}
+                    </label>
+                    <input
+                      className={styles.input}
+                      value={entry.proxyUrl}
+                      onChange={(e) =>
+                        updateField(
+                          'apiKeyEntries',
+                          apiKeyEntries.map((it, i) =>
+                            i === idx ? { ...it, proxyUrl: e.target.value } : it
+                          )
+                        )
+                      }
+                      disabled={mutating}
+                      placeholder="http://127.0.0.1:7890"
+                    />
+                  </div>
+                  <div className={styles.field}>
+                    <label className={styles.label}>
+                      {t('providersPage.form.headers')}
+                      <span className={styles.labelHint}>
+                        {' '}
+                        · {t('providersPage.form.headersHint')}
+                      </span>
+                    </label>
+                    <textarea
+                      className={styles.textarea}
+                      value={entry.headersText}
+                      rows={3}
+                      onChange={(e) =>
+                        updateField(
+                          'apiKeyEntries',
+                          apiKeyEntries.map((it, i) =>
+                            i === idx ? { ...it, headersText: e.target.value } : it
+                          )
+                        )
+                      }
+                      disabled={mutating}
+                      placeholder="X-Custom-Header: value"
+                    />
+                  </div>
+                  {status.state === 'error' ? (
+                    <div className={styles.connectivityError}>
+                      {status.message}
+                    </div>
+                  ) : null}
                 </div>
-              </div>
-            ))}
+              );
+            })}
             <button
               type="button"
               className={styles.addBtn}
diff --git a/src/features/providers/sheets/forms/sharedForm.module.scss b/src/features/providers/sheets/forms/sharedForm.module.scss
index e6cc272..81dff26 100644
--- a/src/features/providers/sheets/forms/sharedForm.module.scss
+++ b/src/features/providers/sheets/forms/sharedForm.module.scss
@@ -207,6 +207,125 @@
   color: var(--muted-foreground);
 }
 
+.entryCardHeaderRight {
+  display: flex;
+  align-items: center;
+  gap: 6px;
+}
+
+.entriesToolbar {
+  display: flex;
+  align-items: center;
+  justify-content: flex-end;
+  gap: 8px;
+  margin-bottom: 2px;
+}
+
+.connectivityRow {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  margin-top: 4px;
+}
+
+.connectivityBtn {
+  display: inline-flex;
+  align-items: center;
+  gap: 6px;
+  height: 28px;
+  padding: 0 12px;
+  border-radius: var(--radius-md);
+  border: 1px solid var(--border-color);
+  background: var(--bg-primary);
+  color: var(--text-primary);
+  font-size: 12px;
+  font-weight: 500;
+  cursor: pointer;
+  transition: background-color $transition-fast, border-color $transition-fast;
+
+  &:hover:not(:disabled) {
+    border-color: var(--primary-color);
+    color: var(--primary-color);
+  }
+
+  &:disabled {
+    opacity: 0.6;
+    cursor: not-allowed;
+  }
+}
+
+.connectivityBtnGhost {
+  display: inline-flex;
+  align-items: center;
+  gap: 6px;
+  height: 24px;
+  padding: 0 8px;
+  border-radius: var(--radius-md);
+  border: 1px solid transparent;
+  background: transparent;
+  color: var(--text-secondary);
+  font-size: 11px;
+  font-weight: 500;
+  cursor: pointer;
+  transition: background-color $transition-fast, color $transition-fast;
+
+  &:hover:not(:disabled) {
+    background: var(--bg-tertiary);
+    color: var(--text-primary);
+  }
+
+  &:disabled {
+    opacity: 0.6;
+    cursor: not-allowed;
+  }
+}
+
+.connectivityError {
+  border: 1px solid var(--destructive-30);
+  background: var(--destructive-10);
+  color: var(--destructive-color);
+  padding: 8px 10px;
+  border-radius: var(--radius-md);
+  font-size: 11px;
+  line-height: 1.4;
+  word-break: break-word;
+}
+
+.connectivityHintSuccess {
+  font-size: 11px;
+  color: var(--primary-color);
+}
+
+.statusIcon {
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  width: 14px;
+  height: 14px;
+}
+
+.statusIconLoading {
+  color: var(--text-secondary);
+  animation: spin 0.8s linear infinite;
+}
+
+.statusIconSuccess {
+  color: var(--primary-color);
+}
+
+.statusIconError {
+  color: var(--destructive-color);
+}
+
+@keyframes spin {
+  from {
+    transform: rotate(0deg);
+  }
+  to {
+    transform: rotate(360deg);
+  }
+}
+
 .entriesList {
   display: flex;
   flex-direction: column;
diff --git a/src/features/providers/sheets/forms/useConnectivityTest.ts b/src/features/providers/sheets/forms/useConnectivityTest.ts
new file mode 100644
index 0000000..e2f2a3c
--- /dev/null
+++ b/src/features/providers/sheets/forms/useConnectivityTest.ts
@@ -0,0 +1,357 @@
+import { useCallback, useEffect, useMemo, useRef, useState } from 'react';
+import { apiCallApi, getApiCallErrorMessage } from '@/services/api';
+import {
+  buildClaudeMessagesEndpoint,
+  buildOpenAIChatCompletionsEndpoint,
+} from '@/components/providers/utils';
+import { buildHeaderObject, hasHeader } from '@/utils/headers';
+import type {
+  ApiKeyEntryInput,
+  ModelEntryInput,
+  ProviderBrand,
+} from '../../types';
+
+const DEFAULT_TIMEOUT_MS = 30_000;
+const DEFAULT_ANTHROPIC_VERSION = '2023-06-01';
+
+export type ConnectivityState = 'idle' | 'loading' | 'success' | 'error';
+
+export interface ConnectivityStatus {
+  state: ConnectivityState;
+  message: string;
+}
+
+const IDLE: ConnectivityStatus = { state: 'idle', message: '' };
+
+const errorMessage = (err: unknown): string => {
+  if (err instanceof Error) return err.message;
+  if (typeof err === 'string') return err;
+  return '';
+};
+
+const pickModel = (
+  testModel: string | undefined,
+  models: ModelEntryInput[]
+): string => {
+  const trimmed = (testModel ?? '').trim();
+  if (trimmed) return trimmed;
+  for (const m of models) {
+    const name = (m.name ?? '').trim();
+    if (name) return name;
+  }
+  return '';
+};
+
+const parseHeadersText = (text: string): Record<string, string> => {
+  const out: Record<string, string> = {};
+  String(text ?? '')
+    .split(/\n+/)
+    .map((line) => line.trim())
+    .filter(Boolean)
+    .forEach((line) => {
+      const sep = line.indexOf(':');
+      if (sep <= 0) return;
+      const key = line.slice(0, sep).trim();
+      const value = line.slice(sep + 1).trim();
+      if (!key) return;
+      out[key] = value;
+    });
+  return out;
+};
+
+const resolveBearerToken = (headers: Record<string, string>): string => {
+  const auth = Object.entries(headers).find(
+    ([k]) => k.toLowerCase() === 'authorization'
+  )?.[1];
+  if (!auth) return '';
+  const match = String(auth).match(/^Bearer\s+(.+)$/i);
+  return match ? match[1].trim() : '';
+};
+
+export interface UseConnectivityTestArgs {
+  brand: ProviderBrand;
+  baseUrl: string;
+  testModel?: string;
+  models: ModelEntryInput[];
+  formHeaders: Array<{ key: string; value: string }>;
+  apiKeyEntries?: ApiKeyEntryInput[];
+  apiKey?: string;
+  fallbackApiKey?: string;
+}
+
+export interface ConnectivityErrorMessages {
+  baseUrlRequired: string;
+  endpointInvalid: string;
+  apiKeyRequired: string;
+  modelRequired: string;
+  timeout: (seconds: number) => string;
+  requestFailed: string;
+}
+
+export interface UseConnectivityTestResult {
+  openaiStatuses: ConnectivityStatus[];
+  claudeStatus: ConnectivityStatus;
+  isTestingAny: boolean;
+  runOpenAIKey: (idx: number) => Promise<boolean>;
+  runOpenAIAllKeys: () => Promise<void>;
+  runClaude: () => Promise<void>;
+}
+
+export function useConnectivityTest(
+  args: UseConnectivityTestArgs,
+  messages: ConnectivityErrorMessages
+): UseConnectivityTestResult {
+  const {
+    brand,
+    baseUrl,
+    testModel,
+    models,
+    formHeaders,
+    apiKeyEntries,
+    apiKey,
+    fallbackApiKey,
+  } = args;
+
+  const entriesCount = apiKeyEntries?.length ?? 0;
+
+  const [openaiStatuses, setOpenaiStatuses] = useState<ConnectivityStatus[]>(
+    () => Array.from({ length: entriesCount }, () => IDLE)
+  );
+  const [claudeStatus, setClaudeStatus] = useState<ConnectivityStatus>(IDLE);
+  const [inFlight, setInFlight] = useState(0);
+
+  useEffect(() => {
+    setOpenaiStatuses((prev) => {
+      if (prev.length === entriesCount) return prev;
+      const next = prev.slice(0, entriesCount);
+      while (next.length < entriesCount) next.push(IDLE);
+      return next;
+    });
+  }, [entriesCount]);
+
+  const signature = useMemo(() => {
+    const h = formHeaders.map((it) => `${it.key}:${it.value}`).join('|');
+    const m = models.map((it) => `${it.name}:${it.alias ?? ''}`).join('|');
+    return `${baseUrl}||${(testModel ?? '').trim()}||${h}||${m}`;
+  }, [baseUrl, testModel, formHeaders, models]);
+
+  const lastSignatureRef = useRef(signature);
+  useEffect(() => {
+    if (lastSignatureRef.current === signature) return;
+    lastSignatureRef.current = signature;
+    setOpenaiStatuses((prev) => prev.map(() => IDLE));
+    setClaudeStatus(IDLE);
+  }, [signature]);
+
+  const updateOpenaiStatus = useCallback(
+    (idx: number, value: ConnectivityStatus) => {
+      setOpenaiStatuses((prev) => {
+        const next = [...prev];
+        next[idx] = value;
+        return next;
+      });
+    },
+    []
+  );
+
+  const runOpenAIKey = useCallback(
+    async (idx: number): Promise<boolean> => {
+      if (brand !== 'openaiCompatibility') return false;
+
+      const trimmedBase = baseUrl.trim();
+      if (!trimmedBase) {
+        updateOpenaiStatus(idx, {
+          state: 'error',
+          message: messages.baseUrlRequired,
+        });
+        return false;
+      }
+      const endpoint = buildOpenAIChatCompletionsEndpoint(trimmedBase);
+      if (!endpoint) {
+        updateOpenaiStatus(idx, {
+          state: 'error',
+          message: messages.endpointInvalid,
+        });
+        return false;
+      }
+      const entry = apiKeyEntries?.[idx];
+      const entryKey = (entry?.apiKey ?? '').trim();
+      if (!entryKey) {
+        updateOpenaiStatus(idx, {
+          state: 'error',
+          message: messages.apiKeyRequired,
+        });
+        return false;
+      }
+      const model = pickModel(testModel, models);
+      if (!model) {
+        updateOpenaiStatus(idx, {
+          state: 'error',
+          message: messages.modelRequired,
+        });
+        return false;
+      }
+
+      const headerObj: Record<string, string> = {
+        'Content-Type': 'application/json',
+        ...buildHeaderObject(formHeaders),
+        ...parseHeadersText(entry?.headersText ?? ''),
+      };
+      if (!hasHeader(headerObj, 'authorization')) {
+        headerObj.Authorization = `Bearer ${entryKey}`;
+      }
+
+      updateOpenaiStatus(idx, { state: 'loading', message: '' });
+      setInFlight((n) => n + 1);
+      try {
+        const result = await apiCallApi.request(
+          {
+            method: 'POST',
+            url: endpoint,
+            header: headerObj,
+            data: JSON.stringify({
+              model,
+              messages: [{ role: 'user', content: 'Hi' }],
+              stream: false,
+              max_tokens: 5,
+            }),
+          },
+          { timeout: DEFAULT_TIMEOUT_MS }
+        );
+        if (result.statusCode < 200 || result.statusCode >= 300) {
+          throw new Error(getApiCallErrorMessage(result));
+        }
+        updateOpenaiStatus(idx, { state: 'success', message: '' });
+        return true;
+      } catch (err) {
+        const raw = errorMessage(err);
+        const isTimeout =
+          (typeof err === 'object' &&
+            err !== null &&
+            'code' in err &&
+            String((err as { code?: string }).code) === 'ECONNABORTED') ||
+          raw.toLowerCase().includes('timeout');
+        updateOpenaiStatus(idx, {
+          state: 'error',
+          message: isTimeout
+            ? messages.timeout(DEFAULT_TIMEOUT_MS / 1000)
+            : raw || messages.requestFailed,
+        });
+        return false;
+      } finally {
+        setInFlight((n) => n - 1);
+      }
+    },
+    [
+      apiKeyEntries,
+      baseUrl,
+      brand,
+      formHeaders,
+      messages,
+      models,
+      testModel,
+      updateOpenaiStatus,
+    ]
+  );
+
+  const runOpenAIAllKeys = useCallback(async (): Promise<void> => {
+    if (brand !== 'openaiCompatibility') return;
+    const entries = apiKeyEntries ?? [];
+    if (!entries.length) return;
+    await Promise.all(entries.map((_, idx) => runOpenAIKey(idx)));
+  }, [apiKeyEntries, brand, runOpenAIKey]);
+
+  const runClaude = useCallback(async (): Promise<void> => {
+    if (brand !== 'claude') return;
+
+    const endpoint = buildClaudeMessagesEndpoint(baseUrl ?? '');
+    if (!endpoint) {
+      setClaudeStatus({ state: 'error', message: messages.endpointInvalid });
+      return;
+    }
+    const model = pickModel(testModel, models);
+    if (!model) {
+      setClaudeStatus({ state: 'error', message: messages.modelRequired });
+      return;
+    }
+
+    const customHeaders = buildHeaderObject(formHeaders);
+    const explicitKey = (apiKey ?? '').trim();
+    const persistedKey = (fallbackApiKey ?? '').trim();
+    const headerKey = resolveBearerToken(customHeaders);
+    const hasApiKeyHeader = hasHeader(customHeaders, 'x-api-key');
+    const resolvedKey = explicitKey || persistedKey || headerKey;
+
+    if (!resolvedKey && !hasApiKeyHeader) {
+      setClaudeStatus({ state: 'error', message: messages.apiKeyRequired });
+      return;
+    }
+
+    const headerObj: Record<string, string> = {
+      'Content-Type': 'application/json',
+      ...customHeaders,
+    };
+    if (!hasHeader(headerObj, 'anthropic-version')) {
+      headerObj['anthropic-version'] = DEFAULT_ANTHROPIC_VERSION;
+    }
+    if (!hasApiKeyHeader && resolvedKey) {
+      headerObj['x-api-key'] = resolvedKey;
+    }
+
+    setClaudeStatus({ state: 'loading', message: '' });
+    setInFlight((n) => n + 1);
+    try {
+      const result = await apiCallApi.request(
+        {
+          method: 'POST',
+          url: endpoint,
+          header: headerObj,
+          data: JSON.stringify({
+            model,
+            max_tokens: 8,
+            messages: [{ role: 'user', content: 'Hi' }],
+          }),
+        },
+        { timeout: DEFAULT_TIMEOUT_MS }
+      );
+      if (result.statusCode < 200 || result.statusCode >= 300) {
+        throw new Error(getApiCallErrorMessage(result));
+      }
+      setClaudeStatus({ state: 'success', message: '' });
+    } catch (err) {
+      const raw = errorMessage(err);
+      const isTimeout =
+        (typeof err === 'object' &&
+          err !== null &&
+          'code' in err &&
+          String((err as { code?: string }).code) === 'ECONNABORTED') ||
+        raw.toLowerCase().includes('timeout');
+      setClaudeStatus({
+        state: 'error',
+        message: isTimeout
+          ? messages.timeout(DEFAULT_TIMEOUT_MS / 1000)
+          : raw || messages.requestFailed,
+      });
+    } finally {
+      setInFlight((n) => n - 1);
+    }
+  }, [
+    apiKey,
+    baseUrl,
+    brand,
+    fallbackApiKey,
+    formHeaders,
+    messages,
+    models,
+    testModel,
+  ]);
+
+  return {
+    openaiStatuses,
+    claudeStatus,
+    isTestingAny: inFlight > 0,
+    runOpenAIKey,
+    runOpenAIAllKeys,
+    runClaude,
+  };
+}
diff --git a/src/i18n/locales/en.json b/src/i18n/locales/en.json
index 355f753..214519e 100644
--- a/src/i18n/locales/en.json
+++ b/src/i18n/locales/en.json
@@ -1549,6 +1549,7 @@
       "disabledHint": "Disabled entries won't be used by the gateway",
       "websockets": "Enable WebSockets",
       "testModel": "Test model",
+      "testModelClaudeHint": "Used for connectivity testing only; not saved",
       "modelsSection": "Custom models",
       "addModel": "Add model",
       "headersSection": "Request headers",
@@ -1599,6 +1600,17 @@
       "disabled": "Disabled",
       "toggleFailed": "Failed to update status"
     },
+    "connectivity": {
+      "test": "Test",
+      "testAll": "Test all",
+      "success": "Reachable",
+      "baseUrlRequired": "Base URL is required",
+      "endpointInvalid": "Endpoint URL is invalid",
+      "apiKeyRequired": "API key is required",
+      "modelRequired": "Test model is required",
+      "timeout": "Timed out after {{seconds}}s",
+      "requestFailed": "Request failed"
+    },
     "modelCatalog": {
       "summaryTitle": "Model catalog",
       "openAction": "Open catalog",
diff --git a/src/i18n/locales/ru.json b/src/i18n/locales/ru.json
index cce3f5c..29adae1 100644
--- a/src/i18n/locales/ru.json
+++ b/src/i18n/locales/ru.json
@@ -1546,6 +1546,7 @@
       "disabledHint": "Отключённые записи не используются шлюзом",
       "websockets": "Включить WebSockets",
       "testModel": "Тестовая модель",
+      "testModelClaudeHint": "Используется только для проверки соединения; не сохраняется",
       "modelsSection": "Пользовательские модели",
       "addModel": "Добавить модель",
       "headersSection": "Заголовки запроса",
@@ -1596,6 +1597,17 @@
       "disabled": "Отключено",
       "toggleFailed": "Не удалось обновить статус"
     },
+    "connectivity": {
+      "test": "Проверить",
+      "testAll": "Проверить все",
+      "success": "Доступно",
+      "baseUrlRequired": "Base URL обязателен",
+      "endpointInvalid": "Некорректный адрес",
+      "apiKeyRequired": "API-ключ обязателен",
+      "modelRequired": "Нужна тестовая модель",
+      "timeout": "Таймаут после {{seconds}} с",
+      "requestFailed": "Запрос не выполнен"
+    },
     "modelCatalog": {
       "summaryTitle": "Каталог моделей",
       "openAction": "Открыть",
diff --git a/src/i18n/locales/zh-CN.json b/src/i18n/locales/zh-CN.json
index f6c9fd6..461fd46 100644
--- a/src/i18n/locales/zh-CN.json
+++ b/src/i18n/locales/zh-CN.json
@@ -1549,6 +1549,7 @@
       "disabledHint": "停用后不会被网关使用",
       "websockets": "启用 WebSockets",
       "testModel": "测试模型",
+      "testModelClaudeHint": "仅用于连通性测试,不会被保存",
       "modelsSection": "自定义模型",
       "addModel": "添加模型",
       "headersSection": "请求头",
@@ -1599,6 +1600,17 @@
       "disabled": "已停用",
       "toggleFailed": "更新状态失败"
     },
+    "connectivity": {
+      "test": "测试",
+      "testAll": "全部测试",
+      "success": "连通",
+      "baseUrlRequired": "服务地址必填",
+      "endpointInvalid": "服务地址不合法",
+      "apiKeyRequired": "API 密钥必填",
+      "modelRequired": "测试模型必填",
+      "timeout": "请求超过 {{seconds}} 秒",
+      "requestFailed": "请求失败"
+    },
     "modelCatalog": {
       "summaryTitle": "模型目录",
       "openAction": "打开目录",
diff --git a/src/i18n/locales/zh-TW.json b/src/i18n/locales/zh-TW.json
index 34ea1cc..f96e048 100644
--- a/src/i18n/locales/zh-TW.json
+++ b/src/i18n/locales/zh-TW.json
@@ -1575,6 +1575,7 @@
       "disabledHint": "停用後不會被閘道使用",
       "websockets": "啟用 WebSockets",
       "testModel": "測試模型",
+      "testModelClaudeHint": "僅用於連通性測試,不會被儲存",
       "modelsSection": "自訂模型",
       "addModel": "新增模型",
       "headersSection": "請求標頭",
@@ -1625,6 +1626,17 @@
       "disabled": "已停用",
       "toggleFailed": "更新狀態失敗"
     },
+    "connectivity": {
+      "test": "測試",
+      "testAll": "全部測試",
+      "success": "連通",
+      "baseUrlRequired": "服務位址必填",
+      "endpointInvalid": "服務位址不合法",
+      "apiKeyRequired": "API 金鑰必填",
+      "modelRequired": "測試模型必填",
+      "timeout": "請求超過 {{seconds}} 秒",
+      "requestFailed": "請求失敗"
+    },
     "modelCatalog": {
       "summaryTitle": "模型目錄",
       "openAction": "開啟目錄",