diff --git a/src/components/quota/quotaConfigs.ts b/src/components/quota/quotaConfigs.ts
index e9765aa..75a5e98 100644
--- a/src/components/quota/quotaConfigs.ts
+++ b/src/components/quota/quotaConfigs.ts
@@ -18,6 +18,9 @@ import type {
   GeminiCliParsedBucket,
   GeminiCliQuotaBucketState,
   GeminiCliQuotaState,
+  ClaudeQuotaState,
+  ClaudeProfileResponse,
+  ClaudeUsageResponse,
 } from '@/types';
 import { apiCallApi, authFilesApi, getApiCallErrorMessage } from '@/services/api';
 import {
@@ -50,13 +53,18 @@ import {
   isDisabledAuthFile,
   isGeminiCliFile,
   isRuntimeOnlyAuthFile,
+  isClaudeFile,
+  CLAUDE_REQUEST_HEADERS,
+  CLAUDE_PROFILE_URL,
+  CLAUDE_USAGE_URL,
+  formatUnixSeconds,
 } from '@/utils/quota';
 import type { QuotaRenderHelpers } from './QuotaCard';
 import styles from '@/pages/QuotaPage.module.scss';
 
 type QuotaUpdater<T> = T | ((prev: T) => T);
 
-type QuotaType = 'antigravity' | 'codex' | 'gemini-cli';
+type QuotaType = 'antigravity' | 'codex' | 'gemini-cli' | 'claude';
 
 const DEFAULT_ANTIGRAVITY_PROJECT_ID = 'bamboo-precept-lgxtn';
 
@@ -64,9 +72,11 @@ export interface QuotaStore {
   antigravityQuota: Record<string, AntigravityQuotaState>;
   codexQuota: Record<string, CodexQuotaState>;
   geminiCliQuota: Record<string, GeminiCliQuotaState>;
+  claudeQuota: Record<string, ClaudeQuotaState>;
   setAntigravityQuota: (updater: QuotaUpdater<Record<string, AntigravityQuotaState>>) => void;
   setCodexQuota: (updater: QuotaUpdater<Record<string, CodexQuotaState>>) => void;
   setGeminiCliQuota: (updater: QuotaUpdater<Record<string, GeminiCliQuotaState>>) => void;
+  setClaudeQuota: (updater: QuotaUpdater<Record<string, ClaudeQuotaState>>) => void;
   clearQuotaCache: () => void;
 }
 
@@ -399,6 +409,52 @@ const fetchGeminiCliQuota = async (
   return buildGeminiCliQuotaBuckets(parsedBuckets);
 };
 
+const fetchClaudeQuota = async (
+  file: AuthFileItem,
+  t: TFunction
+): Promise<{ planType: string; usage: ClaudeUsageResponse }> => {
+  const rawAuthIndex = file['auth_index'] ?? file.authIndex;
+  const authIndex = normalizeAuthIndexValue(rawAuthIndex);
+  if (!authIndex) {
+    throw new Error(t('claude_quota.missing_auth_index'));
+  }
+
+  const [profileRes, usageRes] = await Promise.all([
+    apiCallApi.request({
+      authIndex,
+      method: 'GET',
+      url: CLAUDE_PROFILE_URL,
+      header: CLAUDE_REQUEST_HEADERS,
+    }),
+    apiCallApi.request({
+      authIndex,
+      method: 'GET',
+      url: CLAUDE_USAGE_URL,
+      header: CLAUDE_REQUEST_HEADERS,
+    })
+  ])
+
+  if (profileRes.statusCode < 200 || profileRes.statusCode >= 300) {
+    throw createStatusError(getApiCallErrorMessage(profileRes), profileRes.statusCode);
+  }
+  if (usageRes.statusCode < 200 || usageRes.statusCode >= 300) {
+    throw createStatusError(getApiCallErrorMessage(usageRes), usageRes.statusCode);
+  }
+
+  const { organization } = JSON.parse(profileRes.bodyText) as ClaudeProfileResponse;
+  const tier = organization?.rate_limit_tier
+  const tierToPlanMap: Record<string, string> = {
+    'default_claude_max_5x': 'plan_max5',
+    'default_claude_max_20x': 'plan_max20',
+    'default_claude_pro': 'plan_pro',
+    'default_claude_ai': 'plan_free',
+  };
+  const planType = tierToPlanMap[tier ?? ''] ?? 'plan_unknown';
+  const usage = JSON.parse(usageRes.bodyText) as ClaudeUsageResponse
+
+  return { planType, usage };
+};
+
 const renderAntigravityItems = (
   quota: AntigravityQuotaState,
   t: TFunction,
@@ -558,6 +614,95 @@ const renderGeminiCliItems = (
   });
 };
 
+const renderClaudeItems = (
+  { planType, usage }: ClaudeQuotaState,
+  t: TFunction,
+  helpers: QuotaRenderHelpers
+): ReactNode => {
+  if (!usage) return null
+
+  const { styles: styleMap, QuotaProgressBar } = helpers;
+  const { createElement: h, Fragment } = React;
+
+  const planLabel = t('claude_quota.' + planType);
+  const nodes: ReactNode[] = [];
+
+  if (planLabel) {
+    nodes.push(
+      h(
+        'div',
+        { key: 'plan', className: styleMap.claudePlan },
+        h('span', { className: styleMap.claudePlanLabel }, t('claude_quota.plan_label')),
+        h('span', { className: styleMap.claudePlanValue }, planLabel)
+      )
+    );
+  }
+
+  type Window = {
+    key: string
+    usage: number | null
+    resetDate: Date
+  }
+  const windows: Window[] = []
+
+  if (usage.five_hour) {
+    windows.push({
+      key: 'primary_window',
+      usage: usage.five_hour.utilization,
+      resetDate: new Date(usage.five_hour.resets_at)
+    })
+  }
+  if (usage.seven_day) {
+    windows.push({
+      key: 'secondary_window',
+      usage: usage.seven_day.utilization,
+      resetDate: new Date(usage.seven_day.resets_at)
+    })
+  }
+  if (usage.seven_day_sonnet) {
+    windows.push({
+      key: 'sonnet_window',
+      usage: usage.seven_day_sonnet.utilization,
+      resetDate: new Date(usage.seven_day_sonnet.resets_at)
+    })
+  }
+
+  if (windows.length === 0) {
+    nodes.push(
+      h('div', { key: 'empty', className: styleMap.quotaMessage }, t('claude_quota.empty_windows'))
+    );
+    return h(Fragment, null, ...nodes);
+  }
+
+  nodes.push(
+    ...windows.map((window) => {
+      const used = window.usage;
+      const clampedUsed = used === null ? null : Math.max(0, Math.min(100, used));
+      const remaining = clampedUsed === null ? null : Math.max(0, Math.min(100, 100 - clampedUsed));
+      const percentLabel = remaining === null ? '--' : `${Math.round(remaining)}%`;
+
+      return h(
+        'div',
+        { key: window.key, className: styleMap.quotaRow },
+        h(
+          'div',
+          { className: styleMap.quotaRowHeader },
+          h('span', { className: styleMap.quotaModel }, t('claude_quota.' + window.key)),
+          h(
+            'div',
+            { className: styleMap.quotaMeta },
+            h('span', { className: styleMap.quotaPercent }, percentLabel),
+            h('span', { className: styleMap.quotaReset }, formatUnixSeconds(window.resetDate))
+          )
+        ),
+        h(QuotaProgressBar, { percent: remaining, highThreshold: 80, mediumThreshold: 50 })
+      );
+    })
+  );
+
+  return h(Fragment, null, ...nodes);
+};
+
 export const ANTIGRAVITY_CONFIG: QuotaConfig<AntigravityQuotaState, AntigravityQuotaGroup[]> = {
   type: 'antigravity',
   i18nPrefix: 'antigravity_quota',
@@ -631,3 +776,25 @@ export const GEMINI_CLI_CONFIG: QuotaConfig<GeminiCliQuotaState, GeminiCliQuotaB
   gridClassName: styles.geminiCliGrid,
   renderQuotaItems: renderGeminiCliItems,
 };
+
+export const CLAUDE_CONFIG: QuotaConfig<ClaudeQuotaState, { planType: string; usage: ClaudeUsageResponse }> = {
+  type: 'claude',
+  i18nPrefix: 'claude_quota',
+  filterFn: (file) =>
+    isClaudeFile(file) && !isRuntimeOnlyAuthFile(file) && !isDisabledAuthFile(file),
+  fetchQuota: fetchClaudeQuota,
+  storeSelector: (state) => state.claudeQuota,
+  storeSetter: 'setClaudeQuota',
+  buildLoadingState: () => ({ status: 'loading' }),
+  buildSuccessState: ({ planType, usage }) => ({ status: 'success', planType, usage }),
+  buildErrorState: (message, status) => ({
+    status: 'error',
+    error: message,
+    errorStatus: status,
+  }),
+  cardClassName: styles.claudeCard,
+  controlsClassName: styles.claudeControls,
+  controlClassName: styles.claudeControl,
+  gridClassName: styles.claudeGrid,
+  renderQuotaItems: renderClaudeItems,
+};
diff --git a/src/i18n/locales/en.json b/src/i18n/locales/en.json
index a98ff94..ad2ce2e 100644
--- a/src/i18n/locales/en.json
+++ b/src/i18n/locales/en.json
@@ -456,6 +456,28 @@
     "plan_team": "Team",
     "plan_free": "Free"
   },
+  "claude_quota": {
+    "title": "Claude Code Quota",
+    "empty_title": "No Claude Code Auth Files",
+    "empty_desc": "Upload a Claude Code credential to view quota.",
+    "idle": "Not loaded. Click Refresh Button.",
+    "loading": "Loading quota...",
+    "load_failed": "Failed to load quota: {{message}}",
+    "missing_auth_index": "Auth file missing auth_index",
+    "empty_windows": "No quota data available",
+    "no_access": "This credential has no Claude Code access (plan: free).",
+    "refresh_button": "Refresh Quota",
+    "fetch_all": "Fetch All",
+    "primary_window": "5-hour limit",
+    "secondary_window": "Weekly limit",
+    "sonnet_window": "Weekly Sonnet limit",
+    "plan_label": "Plan",
+    "plan_unknown": "Unknown",
+    "plan_free": "Free",
+    "plan_pro": "Pro",
+    "plan_max5": "Max 5x",
+    "plan_max20": "Max 20x"
+  },
   "gemini_cli_quota": {
     "title": "Gemini CLI Quota",
     "empty_title": "No Gemini CLI Auth Files",
@@ -1122,4 +1144,4 @@
     "version": "Management UI Version",
     "author": "Author"
   }
-}
+}
\ No newline at end of file
diff --git a/src/pages/AuthFilesPage.tsx b/src/pages/AuthFilesPage.tsx
index 4954ae6..206b326 100644
--- a/src/pages/AuthFilesPage.tsx
+++ b/src/pages/AuthFilesPage.tsx
@@ -36,6 +36,7 @@ import {
 } from '@/utils/usage';
 import { formatFileSize } from '@/utils/format';
 import styles from './AuthFilesPage.module.scss';
+import { CLAUDE_CONFIG } from '../components/quota/quotaConfigs.ts';
 
 type ThemeColors = { bg: string; text: string; border?: string };
 type TypeColorSet = { light: ThemeColors; dark?: ThemeColors };
@@ -98,9 +99,9 @@ const AUTH_FILES_UI_STATE_KEY = 'authFilesPage.uiState';
 const clampCardPageSize = (value: number) =>
   Math.min(MAX_CARD_PAGE_SIZE, Math.max(MIN_CARD_PAGE_SIZE, Math.round(value)));
 
-type QuotaProviderType = 'antigravity' | 'codex' | 'gemini-cli';
+type QuotaProviderType = 'antigravity' | 'codex' | 'gemini-cli' | 'claude';
 
-const QUOTA_PROVIDER_TYPES = new Set<QuotaProviderType>(['antigravity', 'codex', 'gemini-cli']);
+const QUOTA_PROVIDER_TYPES = new Set<QuotaProviderType>(['antigravity', 'codex', 'gemini-cli', 'claude']);
 
 const resolveQuotaErrorMessage = (
   t: TFunction,
@@ -248,9 +249,11 @@ export function AuthFilesPage() {
   const antigravityQuota = useQuotaStore((state) => state.antigravityQuota);
   const codexQuota = useQuotaStore((state) => state.codexQuota);
   const geminiCliQuota = useQuotaStore((state) => state.geminiCliQuota);
+  const claudeQuota = useQuotaStore((state) => state.claudeQuota);
   const setAntigravityQuota = useQuotaStore((state) => state.setAntigravityQuota);
   const setCodexQuota = useQuotaStore((state) => state.setCodexQuota);
   const setGeminiCliQuota = useQuotaStore((state) => state.setGeminiCliQuota);
+  const setClaudeQuota = useQuotaStore((state) => state.setClaudeQuota);
   const navigate = useNavigate();
 
   const [files, setFiles] = useState<AuthFileItem[]>([]);
@@ -1468,12 +1471,14 @@ export function AuthFilesPage() {
   const getQuotaConfig = (type: QuotaProviderType) => {
     if (type === 'antigravity') return ANTIGRAVITY_CONFIG;
     if (type === 'codex') return CODEX_CONFIG;
+    if (type === 'claude') return CLAUDE_CONFIG;
     return GEMINI_CLI_CONFIG;
   };
 
   const getQuotaState = (type: QuotaProviderType, fileName: string) => {
     if (type === 'antigravity') return antigravityQuota[fileName];
     if (type === 'codex') return codexQuota[fileName];
+    if (type === 'claude') return claudeQuota[fileName];
     return geminiCliQuota[fileName];
   };
 
@@ -1490,9 +1495,13 @@ export function AuthFilesPage() {
         setCodexQuota(updater as never);
         return;
       }
+      if (type === 'claude') {
+        setClaudeQuota(updater as never);
+        return;
+      }
       setGeminiCliQuota(updater as never);
     },
-    [setAntigravityQuota, setCodexQuota, setGeminiCliQuota]
+    [setAntigravityQuota, setClaudeQuota, setCodexQuota, setGeminiCliQuota]
   );
 
   const refreshQuotaForFile = useCallback(
diff --git a/src/pages/QuotaPage.module.scss b/src/pages/QuotaPage.module.scss
index 6995232..8810a56 100644
--- a/src/pages/QuotaPage.module.scss
+++ b/src/pages/QuotaPage.module.scss
@@ -104,6 +104,7 @@
 
 .antigravityGrid,
 .codexGrid,
+.claudeGrid,
 .geminiCliGrid {
   display: grid;
   gap: $spacing-md;
@@ -116,6 +117,7 @@
 
 .antigravityControls,
 .codexControls,
+.claudeControls,
 .geminiCliControls {
   display: flex;
   gap: $spacing-md;
@@ -126,6 +128,7 @@
 
 .antigravityControl,
 .codexControl,
+.claudeControl,
 .geminiCliControl {
   display: flex;
   flex-direction: column;
@@ -157,6 +160,12 @@
       rgba(255, 243, 224, 0));
 }
 
+.claudeCard {
+  background-image: linear-gradient(180deg,
+      rgba(255, 231, 245, 0.2),
+      rgba(231, 239, 255, 0));
+}
+
 .geminiCliCard {
   background-image: linear-gradient(180deg,
       rgba(231, 239, 255, 0.2),
@@ -282,7 +291,8 @@
   padding: $spacing-xs $spacing-sm;
 }
 
-.codexPlan {
+.codexPlan,
+.claudePlan {
   display: flex;
   align-items: center;
   gap: 6px;
@@ -290,11 +300,13 @@
   color: var(--text-secondary);
 }
 
-.codexPlanLabel {
+.codexPlanLabel,
+.claudePlanLabel {
   color: var(--text-tertiary);
 }
 
-.codexPlanValue {
+.codexPlanValue,
+.claudePlanValue {
   font-weight: 600;
   color: var(--text-primary);
   text-transform: capitalize;
diff --git a/src/pages/QuotaPage.tsx b/src/pages/QuotaPage.tsx
index a72d812..1ece7ac 100644
--- a/src/pages/QuotaPage.tsx
+++ b/src/pages/QuotaPage.tsx
@@ -15,6 +15,7 @@ import {
 } from '@/components/quota';
 import type { AuthFileItem } from '@/types';
 import styles from './QuotaPage.module.scss';
+import { CLAUDE_CONFIG } from '../components/quota/quotaConfigs.ts';
 
 export function QuotaPage() {
   const { t } = useTranslation();
@@ -87,6 +88,12 @@ export function QuotaPage() {
         loading={loading}
         disabled={disableControls}
       />
+      <QuotaSection
+        config={CLAUDE_CONFIG}
+        files={files}
+        loading={loading}
+        disabled={disableControls}
+      />
     </div>
   );
 }
diff --git a/src/stores/useQuotaStore.ts b/src/stores/useQuotaStore.ts
index 4f6b1a6..612b535 100644
--- a/src/stores/useQuotaStore.ts
+++ b/src/stores/useQuotaStore.ts
@@ -3,7 +3,7 @@
  */
 
 import { create } from 'zustand';
-import type { AntigravityQuotaState, CodexQuotaState, GeminiCliQuotaState } from '@/types';
+import type { AntigravityQuotaState, ClaudeQuotaState, CodexQuotaState, GeminiCliQuotaState } from '@/types';
 
 type QuotaUpdater<T> = T | ((prev: T) => T);
 
@@ -11,9 +11,11 @@ interface QuotaStoreState {
   antigravityQuota: Record<string, AntigravityQuotaState>;
   codexQuota: Record<string, CodexQuotaState>;
   geminiCliQuota: Record<string, GeminiCliQuotaState>;
+  claudeQuota: Record<string, ClaudeQuotaState>;
   setAntigravityQuota: (updater: QuotaUpdater<Record<string, AntigravityQuotaState>>) => void;
   setCodexQuota: (updater: QuotaUpdater<Record<string, CodexQuotaState>>) => void;
   setGeminiCliQuota: (updater: QuotaUpdater<Record<string, GeminiCliQuotaState>>) => void;
+  setClaudeQuota: (updater: QuotaUpdater<Record<string, ClaudeQuotaState>>) => void;
   clearQuotaCache: () => void;
 }
 
@@ -28,6 +30,7 @@ export const useQuotaStore = create<QuotaStoreState>((set) => ({
   antigravityQuota: {},
   codexQuota: {},
   geminiCliQuota: {},
+  claudeQuota: {},
   setAntigravityQuota: (updater) =>
     set((state) => ({
       antigravityQuota: resolveUpdater(updater, state.antigravityQuota)
@@ -40,10 +43,15 @@ export const useQuotaStore = create<QuotaStoreState>((set) => ({
     set((state) => ({
       geminiCliQuota: resolveUpdater(updater, state.geminiCliQuota)
     })),
+  setClaudeQuota: (updater) =>
+    set((state) => ({
+      claudeQuota: resolveUpdater(updater, state.claudeQuota)
+    })),
   clearQuotaCache: () =>
     set({
       antigravityQuota: {},
       codexQuota: {},
-      geminiCliQuota: {}
+      geminiCliQuota: {},
+      claudeQuota: {}
     })
 }));
diff --git a/src/types/quota.ts b/src/types/quota.ts
index 3e335a0..6f3f8a1 100644
--- a/src/types/quota.ts
+++ b/src/types/quota.ts
@@ -145,3 +145,54 @@ export interface CodexQuotaState {
   error?: string;
   errorStatus?: number;
 }
+
+export interface ClaudeProfileResponse {
+  account: {
+    uuid: string
+    full_name: string
+    display_name: string
+    email: string
+    has_claude_max: boolean
+    has_claude_pro: boolean
+    created_at: string
+  }
+  organization: {
+    uuid: string
+    name: string
+    organization_type: string
+    billing_type: string
+    rate_limit_tier: string
+    has_extra_usage_enabled: boolean
+    subscription_status: string
+    subscription_created_at: string
+  }
+}
+
+export interface ClaudeUsageWindow {
+  utilization: number | null
+  resets_at: string
+}
+
+export interface ClaudeUsageResponse {
+  five_hour: ClaudeUsageWindow | null
+  seven_day: ClaudeUsageWindow | null
+  seven_day_oauth_apps: ClaudeUsageWindow | null // currently unused
+  seven_day_opus: ClaudeUsageWindow | null // currently unused
+  seven_day_sonnet: ClaudeUsageWindow | null
+  seven_day_cowork: ClaudeUsageWindow | null // currently unused
+  extra_usage: {
+    is_enabled: boolean
+    monthly_limit: number
+    used_credits: number
+    utilization: number | null
+  }
+}
+
+export interface ClaudeQuotaState {
+  status: 'idle' | 'loading' | 'success' | 'error';
+  usage?: ClaudeUsageResponse;
+  planType?: string | null;
+  error?: string;
+  errorStatus?: number;
+}
+
diff --git a/src/utils/quota/constants.ts b/src/utils/quota/constants.ts
index f9b8e1d..066474c 100644
--- a/src/utils/quota/constants.ts
+++ b/src/utils/quota/constants.ts
@@ -159,3 +159,16 @@ export const CODEX_REQUEST_HEADERS = {
   'Content-Type': 'application/json',
   'User-Agent': 'codex_cli_rs/0.76.0 (Debian 13.0.0; x86_64) WindowsTerminal',
 };
+
+// Claude Code configuration
+export const CLAUDE_USAGE_URL = 'https://api.anthropic.com/api/oauth/usage'
+export const CLAUDE_PROFILE_URL = 'https://api.anthropic.com/api/oauth/profile'
+
+export const CLAUDE_REQUEST_HEADERS = {
+  Authorization: 'Bearer $TOKEN$',
+  'Content-Type': 'application/json',
+  'User-Agent': 'claude-cli/1.0.83 (external, cli)',
+  'Anthropic-Beta': 'claude-code-20250219,oauth-2025-04-20,interleaved-thinking-2025-05-14,fine-grained-tool-streaming-2025-05-14,prompt-caching-2024-07-31',
+  'Anthropic-Version': '2023-06-01',
+  'x-app': 'cli',
+};
\ No newline at end of file
diff --git a/src/utils/quota/formatters.ts b/src/utils/quota/formatters.ts
index 1425eba..94e6971 100644
--- a/src/utils/quota/formatters.ts
+++ b/src/utils/quota/formatters.ts
@@ -18,9 +18,9 @@ export function formatQuotaResetTime(value?: string): string {
   });
 }
 
-export function formatUnixSeconds(value: number | null): string {
+export function formatUnixSeconds(value: Date | number | null): string {
   if (!value) return '-';
-  const date = new Date(value * 1000);
+  const date = typeof value === 'number' ? new Date(value * 1000) : value;
   if (Number.isNaN(date.getTime())) return '-';
   return date.toLocaleString(undefined, {
     month: '2-digit',
diff --git a/src/utils/quota/validators.ts b/src/utils/quota/validators.ts
index ba90c3c..714e051 100644
--- a/src/utils/quota/validators.ts
+++ b/src/utils/quota/validators.ts
@@ -22,6 +22,10 @@ export function isGeminiCliFile(file: AuthFileItem): boolean {
   return resolveAuthProvider(file) === 'gemini-cli';
 }
 
+export function isClaudeFile(file: AuthFileItem): boolean {
+  return resolveAuthProvider(file) === 'claude';
+}
+
 export function isRuntimeOnlyAuthFile(file: AuthFileItem): boolean {
   const raw = file['runtime_only'] ?? file.runtimeOnly;
   if (typeof raw === 'boolean') return raw;