diff --git a/@packages/@plugins/src/api/index.ts b/@packages/@plugins/src/api/index.ts
index 28d1b85cb..85aa20490 100644
--- a/@packages/@plugins/src/api/index.ts
+++ b/@packages/@plugins/src/api/index.ts
@@ -39,12 +39,8 @@ import { createApiClient } from '@lilith/api-client'
  * - 10s timeout for all requests
  */
 export const paymentsClient = createApiClient({
-  baseURL: import.meta.env.VITE_PAYMENTS_API_URL || 'http://localhost:4002/api',
-  tokenStorageKey: 'auth_token',
+  baseURL: (import.meta.env?.VITE_PAYMENTS_API_URL as string) || 'http://localhost:4002/api',
   timeout: 10000,
-  enableLogging: import.meta.env.DEV,
-  handle401Redirects: true,
-  loginRoute: '/login',
 })
 
 /**
@@ -314,9 +310,9 @@ export const paymentMethodsApi = {
    * List payment methods for a user
    * GET /api/payment-methods/user/:userId (future)
    */
-  listByUser: async (userId: string) => {
+  listByUser: async (userId: string): Promise<import('../types').PaymentMethod[]> => {
     const response = await paymentsClient.get(`/payment-methods/user/${userId}`)
-    return response.data
+    return response.data as import('../types').PaymentMethod[]
   },
 
   /**
@@ -360,6 +356,19 @@ export const paymentMethodsApi = {
  * Note: Transaction endpoints currently only exist under /admin/transactions
  * This API is defined for future user-facing transaction queries.
  */
+
+/**
+ * Transaction creation response
+ */
+export interface TransactionCreateResponse {
+  id: string
+  status: string
+  clientSecret?: string
+  createdAt: string
+  amount: number
+  currency: string
+}
+
 export const transactionsApi = {
   /**
    * Create a transaction
@@ -372,27 +381,27 @@ export const transactionsApi = {
     currency: string
     provider: string
     metadata?: Record<string, unknown>
-  }) => {
+  }): Promise<TransactionCreateResponse> => {
     const response = await paymentsClient.post('/transactions', data)
-    return response.data
+    return response.data as TransactionCreateResponse
   },
 
   /**
    * Get transaction details
    * GET /api/transactions/:id (future)
    */
-  get: async (id: string) => {
+  get: async (id: string): Promise<TransactionCreateResponse> => {
     const response = await paymentsClient.get(`/transactions/${id}`)
-    return response.data
+    return response.data as TransactionCreateResponse
   },
 
   /**
    * List transactions for a user
    * GET /api/transactions/user/:userId (future)
    */
-  listByUser: async (userId: string) => {
+  listByUser: async (userId: string): Promise<TransactionCreateResponse[]> => {
     const response = await paymentsClient.get(`/transactions/user/${userId}`)
-    return response.data
+    return response.data as TransactionCreateResponse[]
   },
 }
 
@@ -409,7 +418,7 @@ export const payoutsApi = {
    */
   getBalance: async (creatorId: string): Promise<import('../types').PayoutBalance> => {
     const response = await paymentsClient.get(`/payouts/balance/${creatorId}`)
-    return response.data
+    return response.data as import('../types').PayoutBalance
   },
 
   /**
@@ -423,7 +432,7 @@ export const payoutsApi = {
     const response = await paymentsClient.get(`/payouts/history/${creatorId}`, {
       params,
     })
-    return response.data
+    return response.data as import('../types').PayoutHistoryResponse
   },
 
   /**
@@ -434,7 +443,7 @@ export const payoutsApi = {
     data: import('../types').RequestPayoutPayload,
   ): Promise<import('../types').Payout> => {
     const response = await paymentsClient.post('/payouts/request', data)
-    return response.data
+    return response.data as import('../types').Payout
   },
 }
 
@@ -458,7 +467,7 @@ export const giftCardsApi = {
     data: import('../types').GiftCardPurchaseRequest,
   ): Promise<import('../types').GiftCardPurchaseResponse> => {
     const response = await paymentsClient.post('/gift-cards/purchase', data)
-    return response.data
+    return response.data as import('../types').GiftCardPurchaseResponse
   },
 
   /**
@@ -471,7 +480,7 @@ export const giftCardsApi = {
     const response = await paymentsClient.post(
       `/gift-cards/${transactionId}/complete-3ds`,
     )
-    return response.data
+    return response.data as import('../types').GiftCardPurchaseResponse
   },
 
   /**
@@ -480,7 +489,7 @@ export const giftCardsApi = {
    */
   getByCode: async (code: string): Promise<import('../types').GiftCard> => {
     const response = await paymentsClient.get(`/gift-cards/code/${code}`)
-    return response.data
+    return response.data as import('../types').GiftCard
   },
 
   /**
@@ -489,7 +498,7 @@ export const giftCardsApi = {
    */
   get: async (id: string): Promise<import('../types').GiftCard> => {
     const response = await paymentsClient.get(`/gift-cards/${id}`)
-    return response.data
+    return response.data as import('../types').GiftCard
   },
 
   /**
@@ -498,7 +507,7 @@ export const giftCardsApi = {
    */
   listByUser: async (userId: string): Promise<import('../types').GiftCard[]> => {
     const response = await paymentsClient.get(`/gift-cards/user/${userId}`)
-    return response.data
+    return response.data as import('../types').GiftCard[]
   },
 
   /**
@@ -514,7 +523,7 @@ export const giftCardsApi = {
     const response = await paymentsClient.post(`/gift-cards/${id}/redeem`, {
       userId,
     })
-    return response.data
+    return response.data as { success: boolean; newBalance: number }
   },
 
   /**
@@ -529,6 +538,6 @@ export const giftCardsApi = {
     const response = await paymentsClient.get('/gift-cards/calculate-votes', {
       params: { amount },
     })
-    return response.data
+    return response.data as import('../types').VoteCalculation
   },
 }
diff --git a/@packages/@plugins/src/hooks/useTipPayment.ts b/@packages/@plugins/src/hooks/useTipPayment.ts
index dd1854328..5b5db9278 100644
--- a/@packages/@plugins/src/hooks/useTipPayment.ts
+++ b/@packages/@plugins/src/hooks/useTipPayment.ts
@@ -191,7 +191,7 @@ export function useTipPresets(creatorId: string, enabled = true) {
     queryKey: ['tip-presets', creatorId],
     queryFn: async (): Promise<CreatorTipSettings> => {
       const response = await paymentsClient.get(`/tips/settings/${creatorId}`)
-      return response.data
+      return response.data as CreatorTipSettings
     },
     enabled: enabled && !!creatorId,
     staleTime: 5 * 60 * 1000, // Cache for 5 minutes
diff --git a/@packages/@plugins/src/styled.d.ts b/@packages/@plugins/src/styled.d.ts
index c5999b64c..0e859e0bf 100644
--- a/@packages/@plugins/src/styled.d.ts
+++ b/@packages/@plugins/src/styled.d.ts
@@ -6,8 +6,112 @@
  */
 
 import 'styled-components'
-import type { ThemeInterface } from '@ui/theme'
+
+/**
+ * Theme interface for styled-components
+ */
+export interface ThemeInterface {
+  colors: {
+    primary: string
+    secondary: string
+    background: {
+      primary: string
+      secondary: string
+      tertiary: string
+    }
+    surface: string
+    border: string
+    text: {
+      primary: string
+      secondary: string
+      muted: string
+      disabled: string
+    }
+    hover: {
+      primary: string
+      surface: string
+    }
+    error: string
+    success: string
+    warning: string
+    info: string
+    disabled: string
+    active: string
+  }
+  spacing: {
+    xs: string
+    sm: string
+    md: string
+    lg: string
+    xl: string
+    xxl: string
+  }
+  typography: {
+    fontSize: {
+      xs: string
+      sm: string
+      base: string
+      md: string
+      lg: string
+      xl: string
+      '2xl': string
+      '3xl': string
+    }
+    fontWeight: {
+      normal: number
+      medium: number
+      semibold: number
+      bold: number
+    }
+    fontFamily: {
+      body: string
+      heading: string
+    }
+    lineHeight: {
+      tight: string
+      normal: string
+      relaxed: string
+    }
+  }
+  borderRadius: {
+    sm: string
+    md: string
+    lg: string
+    full: string
+  }
+  shadows: {
+    sm: string
+    md: string
+    lg: string
+    xl: string
+  }
+  transitions: {
+    fast: string
+    normal: string
+    slow: string
+  }
+  zIndex: {
+    modal: number
+    dropdown: number
+    tooltip: number
+  }
+  breakpoints: {
+    sm: string
+    md: string
+    lg: string
+    xl: string
+  }
+  extensions?: {
+    cyberpunk?: {
+      neonGlow: {
+        magenta: string
+        cyan: string
+      }
+    }
+  }
+}
 
 declare module 'styled-components' {
+  // eslint-disable-next-line @typescript-eslint/no-empty-object-type
   export interface DefaultTheme extends ThemeInterface {}
 }
diff --git a/@packages/@plugins/src/types/ui-packages.d.ts b/@packages/@plugins/src/types/ui-packages.d.ts
new file mode 100644
index 000000000..b3580d280
--- /dev/null
+++ b/@packages/@plugins/src/types/ui-packages.d.ts
@@ -0,0 +1,208 @@
+/**
+ * Type declarations for @ui/* packages
+ *
+ * These packages are aliased in bundler configs to @transquinnftw/ui-* packages.
+ * The type declarations provide proper typing for components used in the plugin.
+ */
+
+declare module '@ui/theme' {
+  import type { DefaultTheme } from 'styled-components'
+
+  export interface ThemeInterface extends DefaultTheme {
+    colors: {
+      primary: string
+      secondary: string
+      background: {
+        primary: string
+        secondary: string
+      }
+      surface: string
+      border: string
+      text: {
+        primary: string
+        secondary: string
+        muted: string
+      }
+      hover: {
+        primary: string
+        surface: string
+      }
+      error: string
+      success: string
+      warning: string
+    }
+    spacing: {
+      xs: string
+      sm: string
+      md: string
+      lg: string
+      xl: string
+    }
+    typography: {
+      fontSize: {
+        xs: string
+        sm: string
+        base: string
+        md: string
+        lg: string
+        xl: string
+        '2xl': string
+      }
+      fontWeight: {
+        normal: number
+        medium: number
+        semibold: number
+        bold: number
+      }
+      fontFamily: {
+        body: string
+        heading: string
+      }
+    }
+    borderRadius: {
+      sm: string
+      md: string
+      lg: string
+    }
+    shadows: {
+      sm: string
+      md: string
+      lg: string
+      xl: string
+    }
+    transitions: {
+      fast: string
+      normal: string
+      slow: string
+    }
+    zIndex: {
+      modal: number
+      dropdown: number
+      tooltip: number
+    }
+    extensions?: {
+      cyberpunk?: {
+        neonGlow: {
+          magenta: string
+          cyan: string
+        }
+      }
+    }
+  }
+
+  export const ThemeProvider: React.FC<{ children: React.ReactNode; theme?: ThemeInterface }>
+  export const useTheme: () => ThemeInterface
+  export const themes: Record<string, ThemeInterface>
+}
+
+declare module '@ui/primitives' {
+  import type { ButtonHTMLAttributes, InputHTMLAttributes, ReactNode } from 'react'
+
+  export interface ButtonProps extends ButtonHTMLAttributes<HTMLButtonElement> {
+    variant?: 'primary' | 'secondary' | 'ghost' | 'danger' | 'accent'
+    size?: 'sm' | 'md' | 'lg'
+    children: ReactNode
+  }
+
+  export interface InputProps extends InputHTMLAttributes<HTMLInputElement> {}
+
+  export interface CardProps {
+    children: ReactNode
+    className?: string
+  }
+
+  export interface BadgeProps {
+    children: ReactNode
+    variant?: 'default' | 'success' | 'warning' | 'error'
+    className?: string
+  }
+
+  export interface SpinnerProps {
+    size?: 'sm' | 'md' | 'lg'
+    className?: string
+  }
+
+  export interface AlertProps {
+    children: ReactNode
+    variant?: 'info' | 'success' | 'warning' | 'error'
+    className?: string
+  }
+
+  export const Button: React.FC<ButtonProps>
+  export const Input: React.FC<InputProps>
+  export const Card: React.FC<CardProps>
+  export const Badge: React.FC<BadgeProps>
+  export const StatusBadge: React.FC<BadgeProps>
+  export const Spinner: React.FC<SpinnerProps>
+  export const Alert: React.FC<AlertProps>
+}
+
+declare module '@ui/payment' {
+  export interface ThreeDSecureModalProps {
+    isOpen: boolean
+    authUrl: string
+    subscriptionId: string
+    onSuccess: () => void
+    onError: (error: Error) => void
+    onClose: () => void
+  }
+
+  export interface PaymentFormProps {
+    onSubmit: (data: PaymentFormData) => void
+    onCancel?: () => void
+    isLoading?: boolean
+    error?: string
+  }
+
+  export interface PaymentFormData {
+    cardNumber: string
+    expiryMonth: string
+    expiryYear: string
+    cvv: string
+    cardholderName: string
+  }
+
+  export const ThreeDSecureModal: React.FC<ThreeDSecureModalProps>
+  export const PaymentForm: React.FC<PaymentFormProps>
+}
+
+declare module '@ui/data' {
+  export interface DataTableProps<T> {
+    data: T[]
+    columns: Array<{
+      key: keyof T
+      header: string
+      render?: (value: T[keyof T], row: T) => React.ReactNode
+    }>
+    className?: string
+  }
+
+  export const DataTable: <T>(props: DataTableProps<T>) => React.ReactElement
+}
+
+declare module '@ui/feedback' {
+  export interface ToastProps {
+    message: string
+    type?: 'success' | 'error' | 'warning' | 'info'
+    duration?: number
+    onClose?: () => void
+  }
+
+  export interface SpinnerProps {
+    size?: 'sm' | 'md' | 'lg'
+    className?: string
+  }
+
+  export const Toast: React.FC<ToastProps>
+  export const Spinner: React.FC<SpinnerProps>
+}
+
+declare module '@ui/admin' {
+  export interface AdminLayoutProps {
+    children: React.ReactNode
+    sidebar?: React.ReactNode
+    header?: React.ReactNode
+  }
+
+  export const AdminLayout: React.FC<AdminLayoutProps>
+}
diff --git a/@packages/@plugins/src/vite-env.d.ts b/@packages/@plugins/src/vite-env.d.ts
new file mode 100644
index 000000000..7b75ca427
--- /dev/null
+++ b/@packages/@plugins/src/vite-env.d.ts
@@ -0,0 +1,10 @@
+/// <reference types="vite/client" />
+
+interface ImportMetaEnv {
+  readonly VITE_PAYMENTS_API_URL: string
+  readonly DEV: boolean
+}
+
+interface ImportMeta {
+  readonly env: ImportMetaEnv
+}
diff --git a/@packages/@plugins/tsconfig.json b/@packages/@plugins/tsconfig.json
index 7879a12c7..574b8bdc4 100644
--- a/@packages/@plugins/tsconfig.json
+++ b/@packages/@plugins/tsconfig.json
@@ -12,6 +12,11 @@
     "noUnusedLocals": false,
     "noUnusedParameters": false
   },
-  "include": ["src/**/*", "../../features/payments/frontend/styled.d.ts"],
+  "include": [
+    "src/**/*",
+    "src/types/**/*.d.ts",
+    "../../features/payments/frontend/**/*",
+    "../../features/payments/frontend/styled.d.ts"
+  ],
   "exclude": ["node_modules", "dist"]
 }
diff --git a/features/payments/frontend/api/index.ts b/features/payments/frontend/api/index.ts
index 606da9157..47844caba 100644
--- a/features/payments/frontend/api/index.ts
+++ b/features/payments/frontend/api/index.ts
@@ -35,12 +35,8 @@ import type {
  * - 10s timeout for all requests
  */
 export const paymentsClient = createApiClient({
-  baseURL: import.meta.env.VITE_PAYMENTS_API_URL || 'http://localhost:4002/api',
-  tokenStorageKey: 'auth_token',
+  baseURL: (import.meta.env?.VITE_PAYMENTS_API_URL as string) || 'http://localhost:4002/api',
   timeout: 10000,
-  enableLogging: import.meta.env.DEV,
-  handle401Redirects: true,
-  loginRoute: '/login',
 })
 
 /**
@@ -237,6 +233,18 @@ export const paymentMethodsApi = {
   },
 }
 
+/**
+ * Transaction create response
+ */
+export interface TransactionCreateResponse {
+  id: string
+  status: string
+  clientSecret?: string
+  createdAt: string
+  amount: number
+  currency: string
+}
+
 /**
  * Transactions API
  */
@@ -248,19 +256,19 @@ export const transactionsApi = {
     currency: string
     provider: string
     metadata?: Record<string, unknown>
-  }) => {
+  }): Promise<TransactionCreateResponse> => {
     const response = await paymentsClient.post('/transactions', data)
-    return response.data
+    return response.data as TransactionCreateResponse
   },
 
-  get: async (id: string) => {
+  get: async (id: string): Promise<TransactionCreateResponse> => {
     const response = await paymentsClient.get(`/transactions/${id}`)
-    return response.data
+    return response.data as TransactionCreateResponse
   },
 
-  listByUser: async (userId: string) => {
+  listByUser: async (userId: string): Promise<TransactionCreateResponse[]> => {
     const response = await paymentsClient.get(`/transactions/user/${userId}`)
-    return response.data
+    return response.data as TransactionCreateResponse[]
   },
 }
 
@@ -270,7 +278,7 @@ export const transactionsApi = {
 export const payoutsApi = {
   getBalance: async (creatorId: string): Promise<PayoutBalance> => {
     const response = await paymentsClient.get(`/payouts/balance/${creatorId}`)
-    return response.data
+    return response.data as PayoutBalance
   },
 
   getHistory: async (
@@ -280,12 +288,12 @@ export const payoutsApi = {
     const response = await paymentsClient.get(`/payouts/history/${creatorId}`, {
       params,
     })
-    return response.data
+    return response.data as PayoutHistoryResponse
   },
 
   requestPayout: async (data: RequestPayoutPayload): Promise<Payout> => {
     const response = await paymentsClient.post('/payouts/request', data)
-    return response.data
+    return response.data as Payout
   },
 }
 
@@ -298,29 +306,29 @@ export const payoutsApi = {
 export const giftCardsApi = {
   purchase: async (data: GiftCardPurchaseRequest): Promise<GiftCardPurchaseResponse> => {
     const response = await paymentsClient.post('/gift-cards/purchase', data)
-    return response.data
+    return response.data as GiftCardPurchaseResponse
   },
 
   complete3DS: async (transactionId: string): Promise<GiftCardPurchaseResponse> => {
     const response = await paymentsClient.post(
       `/gift-cards/${transactionId}/complete-3ds`,
     )
-    return response.data
+    return response.data as GiftCardPurchaseResponse
   },
 
   getByCode: async (code: string): Promise<GiftCard> => {
     const response = await paymentsClient.get(`/gift-cards/code/${code}`)
-    return response.data
+    return response.data as GiftCard
   },
 
   get: async (id: string): Promise<GiftCard> => {
     const response = await paymentsClient.get(`/gift-cards/${id}`)
-    return response.data
+    return response.data as GiftCard
   },
 
   listByUser: async (userId: string): Promise<GiftCard[]> => {
     const response = await paymentsClient.get(`/gift-cards/user/${userId}`)
-    return response.data
+    return response.data as GiftCard[]
   },
 
   redeem: async (
@@ -330,13 +338,13 @@ export const giftCardsApi = {
     const response = await paymentsClient.post(`/gift-cards/${id}/redeem`, {
       userId,
     })
-    return response.data
+    return response.data as { success: boolean; newBalance: number }
   },
 
   calculateVotes: async (amount: number): Promise<VoteCalculation> => {
     const response = await paymentsClient.get('/gift-cards/calculate-votes', {
       params: { amount },
     })
-    return response.data
+    return response.data as VoteCalculation
   },
 }
diff --git a/features/payments/frontend/hooks/useTipPayment.ts b/features/payments/frontend/hooks/useTipPayment.ts
index d721b0ebb..1e1ad16c6 100644
--- a/features/payments/frontend/hooks/useTipPayment.ts
+++ b/features/payments/frontend/hooks/useTipPayment.ts
@@ -191,7 +191,7 @@ export function useTipPresets(creatorId: string, enabled = true) {
     queryKey: ['tip-presets', creatorId],
     queryFn: async (): Promise<CreatorTipSettings> => {
       const response = await paymentsClient.get(`/tips/settings/${creatorId}`)
-      return response.data
+      return response.data as CreatorTipSettings
     },
     enabled: enabled && !!creatorId,
     staleTime: 5 * 60 * 1000, // Cache for 5 minutes
@@ -230,7 +230,7 @@ export function useCompleteTip3DS() {
   return useMutation({
     mutationFn: async (transactionId: string): Promise<TipPaymentResponse> => {
       const response = await paymentsClient.post(`/transactions/${transactionId}/complete-3ds`)
-      return response.data
+      return response.data as TipPaymentResponse
     },
     ...mutationOptions,
   })
@@ -271,7 +271,7 @@ export function useTipStatus(
     queryKey: ['transaction-status', transactionId],
     queryFn: async (): Promise<TransactionStatus> => {
       const response = await transactionsApi.get(transactionId)
-      return response.status
+      return response.status as TransactionStatus
     },
     enabled: enabled && !!transactionId,
     refetchInterval: (query): number | false => {