diff --git a/package.json b/package.json
index 116e7dc..6621895 100644
--- a/package.json
+++ b/package.json
@@ -3,6 +3,7 @@
 	"description": "Paylike API",
 	"version": "2.0.2",
 	"main": "src",
+	"types": "src/index.d.ts",
 	"repository": "paylike/node-api",
 	"scripts": {
 		"test": "node test",
diff --git a/src/index.d.ts b/src/index.d.ts
new file mode 100644
index 0000000..095f738
--- /dev/null
+++ b/src/index.d.ts
@@ -0,0 +1,298 @@
+// Type definitions for Paylike
+
+import * as Promise from 'bluebird'
+
+declare class Paylike {
+  constructor(appKey: string)
+
+  transactions: Paylike.Transactions
+  merchants: Paylike.Merchants
+  cards: Paylike.Cards
+  apps: Paylike.Apps
+  service: Paylike.Service
+}
+
+declare namespace Paylike {
+
+  export interface PaylikeError extends Error {
+    message: string
+  }
+  export interface PaylikeErrorConstructor extends Error {
+    new (message: string): PaylikeError
+    (message: string): PaylikeError
+    prototype: PaylikeError
+  }
+  export const Error: PaylikeErrorConstructor
+
+
+  export interface AuthorizationError extends PaylikeError {
+    message: string
+  }
+  export interface AuthorizationErrorConstructor extends PaylikeError {
+    new (message: string): AuthorizationError
+    (message: string): AuthorizationError
+    prototype: AuthorizationError
+  }
+  export const AuthorizationError: AuthorizationErrorConstructor
+
+
+  export interface PermissionsError extends PaylikeError {
+    message: string
+  }
+  export interface PermissionsErrorConstructor extends PaylikeError {
+    new (message: string): PermissionsError
+    (message: string): PermissionsError
+    prototype: PermissionsError
+  }
+  export const PermissionsError: PermissionsErrorConstructor
+
+
+  export interface NotFoundError extends PaylikeError {
+    message: string
+  }
+  export interface NotFoundErrorConstructor extends PaylikeError {
+    new (message: string): NotFoundError
+    (message: string): NotFoundError
+    prototype: NotFoundError
+  }
+  export const NotFoundError: NotFoundErrorConstructor
+
+
+  export interface ConflictError extends PaylikeError {
+    message: string
+  }
+  export interface ConflictErrorConstructor extends PaylikeError {
+    new (message: string): ConflictError
+    (message: string): ConflictError
+    prototype: ConflictError
+  }
+  export const ConflictError: ConflictErrorConstructor
+
+
+  export interface ValidationError extends PaylikeError {
+    message: string
+  }
+  export interface ValidationErrorConstructor extends PaylikeError {
+    new (message: string): ValidationError
+    (message: string): ValidationError
+    prototype: ValidationError
+  }
+  export const ValidationError: ValidationErrorConstructor
+
+  interface Cursor<T> {
+    after: (id: string) => Cursor<T>
+    before: (id: string) => Cursor<T>
+    limit: (limit: number) => Cursor<T>
+    stream: (highWaterMark: number) => any
+    toArray: () => Promise<Array<T>>
+  }
+
+  interface Apps {
+    create: (opts: any, cb?: (err) => void) => Promise<void>
+    findOne: (cb?: (err) => void) => Promise<App>
+  }
+
+  interface App {
+    id: string
+    name: string
+    key: string
+  }
+
+  interface Merchants {
+    create: (opts: any) => Promise<string>
+    update: (merchantId: string, opts: any) => Promise<void>
+    findOne: (merchantId: string) => Promise<Merchant>
+
+    apps: Merchants.Apps
+    users: Merchants.Users
+    lines: Merchants.Lines
+    transactions: Merchants.Transactions
+  }
+
+  interface Merchant {
+    name: string           // optional
+    currency: string       // required, three letter ISO
+    test: boolean          // optional, defaults to false
+    email: string          // required, contact email
+    website: string        // required, website with implementation
+    descriptor: string     // required, text on client bank statements
+    company: Merchant.Company
+    bank: Merchant.Bank    // optional
+  }
+
+  namespace Merchant {
+    interface Company {
+      country: string      // required, ISO 3166 code (e.g. DK)
+      number: string       // optional, registration number ("CVR" in Denmark)
+    }
+
+    interface Bank {
+      iban: string         // optional, (format: XX00000000, XX is country code, length varies)
+    }
+  }
+
+  namespace Merchants {
+    interface Users {
+      add: (merchantId: string, opts: any, cb?: (err: any, value?: any) => void) => Promise<void>
+      revoke: (merchantId: string, userId: string, cb?: (err: any, value?: any) => void) => Promise<void>
+      find: (merchantId: string) => Cursor<Merchants.User>
+    }
+
+    interface User {
+      id: string
+      created: Date
+      email: string
+    }
+
+    interface Apps {
+      add: (merchantId: string, opts: any, cb?: (err: any, value?: any) => void) => Promise<void>
+      revoke: (merchantId: string, appId: string, cb?: (err: any, value?: any) => void) => Promise<void>
+      find: (merchantId: string) => Cursor<App>
+    }
+
+    interface Lines {
+      find: (merchantId: string) => Cursor<Merchants.Line>
+    }
+
+    interface Line {
+      id: string
+      created: Date
+      merchantId: string
+      transactionId: string
+      amount: Amount
+      balance: number
+      capture: boolean
+      fee: number
+    }
+
+    interface Amount {
+      amount: number
+      currency: string
+    }
+
+    interface Transactions {
+      create: (merchantId: string, opts: CreateTransactionOptions, cb?: (err: any, value?: string) => void) => Promise<string>
+      find: (merchantId: string) => Cursor<Transaction>
+    }
+  }
+
+  interface CreateTransactionOptions {
+    transactionId?: string
+    cardId?: string
+    amount: number
+    currency: string
+    descriptor?: any
+    custom?: any
+  }
+
+  interface VoidTransactionOptions {
+    amount: number
+  }
+
+  interface RefundTransactionOptions {
+    amount: number
+    descriptor: string
+  }
+
+  interface Transactions {
+    capture: (transactionId: string, opts: CaptureTransactionOptions, cb?: (err: any, value?: any) => void) => Promise<void>
+    refund: (transactionId: string, opts: RefundTransactionOptions, cb?: (err: any, value?: any) => void) => Promise<void>
+    void: (transactionId: string, opts: VoidTransactionOptions, cb?: (err: any, value?: any) => void) => Promise<void>
+    findOne: (transactionId: string) => Promise<Transaction>
+  }
+
+  interface CaptureTransactionOptions {
+    amount: number
+    currency: string
+    descriptor?: string
+  }
+
+  interface Transaction {
+    id: string
+    merchantId: string     // ID of the owning merchant account
+    test: boolean          // whether on a test merchant account
+    created: Date          // Date of transaction
+
+    currency: string       // currency ISO code
+    amount: number         // amount in minor units
+    descriptor: string     // text on bank statement
+
+    pendingAmount: number  // amount available for capture or void
+    capturedAmount: number // amount captured (available for refund)
+    refundedAmount: number // amount refunded (no further action possible)
+    voidedAmount: number   // amount voided (no further action possible)
+    disputedAmount: number // amount involed in disputes such as chargebacks
+
+    card: {
+      bin: string          // first 6 numbers in PAN (card number)
+      last4: string
+      expiry: Date
+      scheme: string       // "visa" or "mastercard"
+    }
+
+    custom: any
+
+    tds: string
+    recurring: boolean     // whether the transaction was made from the server
+    successful: boolean
+    error: false|any       // contains a processing error if unsuccessful
+
+    trail: Array<TrailItem>
+  }
+
+  interface TrailItem {
+    // only one of the following will be present
+    capture?: boolean
+    refund?: boolean
+    void?: boolean
+    dispute?: {
+      id: string
+
+      // only one of the following will be present
+      won?: boolean
+      lost?: boolean
+    }
+
+    created: Date
+
+    amount: number     // amount in minor units and transaction currency
+
+    /*
+     Amount in the merchant account's currency in minor units that
+     the merchant account balance was affected with which in
+     practice means the actual profit from the transaction after
+     fees and/or currency conversion.
+     */
+    balance: number
+
+    fee: any           // detailed description of fees applied
+    descriptor: string // text on bank statement
+
+    lineId: string     // ID of the related accounting line
+  }
+
+  interface Cards {
+    create: (merchantId: string, opts: any) => Promise<string>
+    findOne: (cardId: string) => Promise<Card>
+  }
+
+  interface Card {
+    id: string
+    merchantId: string
+    created: Date
+    bin: string         // first 6 numbers in PAN (card number)
+    last4: string
+    expiry: Date
+    scheme: Card.Scheme // "visa" or "mastercard"
+  }
+
+  namespace Card {
+    type Scheme = 'visa' | 'mastercard'
+  }
+
+  interface Service {
+    request: (verb: string, path: string, query: any, cb?: (err: any, value?: any) => void) => Promise<any>
+  }
+}
+
+export = Paylike