diff --git a/.changeset/orange-dragons-repair.md b/.changeset/orange-dragons-repair.md
new file mode 100644
index 0000000..63da30a
--- /dev/null
+++ b/.changeset/orange-dragons-repair.md
@@ -0,0 +1,5 @@
+---
+"khalti-epayment": patch
+---
+
+add builders
diff --git a/epaymentv2/khaltiInstanceServer.ts b/epaymentv2/khaltiInstanceServer.ts
deleted file mode 100644
index e69de29..0000000
diff --git a/epaymentv2/paymentLookup.ts b/epaymentv2/paymentLookup.ts
index 3946b35..71ac8da 100644
--- a/epaymentv2/paymentLookup.ts
+++ b/epaymentv2/paymentLookup.ts
@@ -21,16 +21,13 @@ export interface PaymentLookupRequest {
 /**
  * Represents the base structure of a successful lookup API response.
  */
-export interface PaymentLookupSuccessResponse {
+interface PaymentLookupGeneralResponse {
   /** The initial payment identifier. */
   pidx: string;
 
   /** The total amount of the transaction (in what currency? Assuming Paisa here). */
   total_amount: number;
 
-  /** The current status of the transaction. */
-  status: PaymentStatus;
-
   /** The unique transaction identifier assigned by Khalti. */
   transaction_id: string | null;
 
@@ -39,13 +36,24 @@ export interface PaymentLookupSuccessResponse {
 
   /** Indicates whether the transaction has been refunded. */
   refunded: boolean;
+
+  /** The current status of the transaction. */
+  status: PaymentStatus;
+}
+
+/**
+ * Represents a specific lookup response for a 'Success' transaction.
+ */
+export interface PaymentLookupSuccessResponse
+  extends PaymentLookupGeneralResponse {
+  status: "Completed"; // Enforce the specific status
 }
 
 /**
  * Represents a specific lookup response for a 'Pending' transaction.
  */
 export interface PaymentLookupPendingResponse
-  extends PaymentLookupSuccessResponse {
+  extends PaymentLookupGeneralResponse {
   status: "Pending"; // Enforce the specific status
   transaction_id: null; // Transaction ID not yet generated
 }
@@ -54,7 +62,7 @@ export interface PaymentLookupPendingResponse
  * Represents a specific lookup response for an 'Initiated' transaction.
  */
 export interface PaymentLookupInitiatedResponse
-  extends PaymentLookupSuccessResponse {
+  extends PaymentLookupGeneralResponse {
   status: "Initiated";
 }
 
@@ -62,7 +70,7 @@ export interface PaymentLookupInitiatedResponse
  * Represents a specific lookup response for a 'Refunded' transaction.
  */
 export interface PaymentLookupRefundedResponse
-  extends PaymentLookupSuccessResponse {
+  extends PaymentLookupGeneralResponse {
   status: "Refunded";
   refunded: true;
 }
@@ -71,7 +79,7 @@ export interface PaymentLookupRefundedResponse
  * Represents a specific lookup response for an 'Expired' transaction.
  */
 export interface PaymentLookupExpiredResponse
-  extends PaymentLookupSuccessResponse {
+  extends PaymentLookupGeneralResponse {
   status: "Expired";
   transaction_id: null;
 }
@@ -80,12 +88,13 @@ export interface PaymentLookupExpiredResponse
  * Represents a specific lookup response for a 'UserCanceled' transaction.
  */
 export interface PaymentLookupCanceledResponse
-  extends PaymentLookupSuccessResponse {
+  extends PaymentLookupGeneralResponse {
   status: "UserCanceled";
   transaction_id: null;
 }
 
 export type AllLookupResponse =
+  | PaymentLookupSuccessResponse
   | PaymentLookupPendingResponse
   | PaymentLookupInitiatedResponse
   | PaymentLookupRefundedResponse
diff --git a/index.ts b/index.ts
index fb3443b..5942e8d 100644
--- a/index.ts
+++ b/index.ts
@@ -1,9 +1,12 @@
-import axios from "axios";
+import axios, { AxiosInstance } from "axios";
 import type {
   InitiatePaymentRequest,
   InitiatePaymentResponse,
 } from "./epaymentv2/initiatePayment";
-import type { AllLookupResponse } from "./epaymentv2/paymentLookup";
+import type {
+  AllLookupResponse,
+  PaymentLookupRequest,
+} from "./epaymentv2/paymentLookup";
 
 async function awTry<T>(promise: unknown) {
   try {
@@ -15,36 +18,104 @@ async function awTry<T>(promise: unknown) {
   }
 }
 
-const khaltiInstanceServer = axios.create({
-  baseURL: "https://a.khalti.com/api/v2",
-  headers: {
-    "Content-Type": "application/json",
-    Authorization: `Key f79110302bbf46828fca3a7b7514da97`, // live secret key
-  },
-  responseType: "json",
-});
-
-const paymentLookup = async (pidx: string) => {
-  const [response, error] = await awTry<{ data: AllLookupResponse }>(
-    khaltiInstanceServer.get(`/epayment/lookup?pidx=${pidx}`)
-  );
-  if (error) {
-    console.log("Error, in lookupPayment: ", error);
-  }
-  return response.data;
+const paymentLookup = (instance: AxiosInstance) => {
+  return async ({ pidx }: PaymentLookupRequest) => {
+    const [response, error] = await awTry<{ data: AllLookupResponse }>(
+      instance.get(`/epayment/lookup?pidx=${pidx}`)
+    );
+    if (error) {
+      console.log("Error, in lookupPayment: ", error);
+    }
+    return response.data;
+  };
 };
 
-const initiatePayment = async (payload: InitiatePaymentRequest) => {
-  const [response, error] = await awTry<{ data: InitiatePaymentResponse }>(
-    khaltiInstanceServer.post("/epayment/initiate/", payload)
-  );
-  if (error) {
-    console.log("Error, in initiatePayment: ", error);
-  }
-  return response.data;
+const initiatePayment = (instance: AxiosInstance) => {
+  return async (payload: InitiatePaymentRequest) => {
+    const [response, error] = await awTry<{ data: InitiatePaymentResponse }>(
+      instance.post("/epayment/initiate/", payload)
+    );
+
+    if (error) {
+      console.log("Error, in initiatePayment: ", error);
+    }
+    return response.data;
+  };
 };
 
-export const khaltiApi = {
-  initiatePayment,
-  paymentLookup,
+export const createKhaltiInstance = ({
+  env,
+  secretKey,
+}: {
+  env: "sandbox" | "production";
+  secretKey: string;
+}) => {
+  const urls = {
+    sandbox: "https://a.khalti.com/api/v2",
+    production: "https://khalti.com/api/v2",
+  };
+  const instance = axios.create({
+    baseURL: urls[env],
+    headers: {
+      "Content-Type": "application/json",
+      Authorization: `Key ${secretKey}`, // live secret key
+    },
+    responseType: "json",
+  });
+
+  return {
+    paymentLookup: paymentLookup(instance),
+    initiatePayment: initiatePayment(instance),
+  };
 };
+
+// const ins = createKhaltiInstance({
+//   env: "sandbox",
+//   secretKey: "Asd",
+// });
+
+// async function a() {
+//   const { payment_url, pidx } = await ins.initiatePayment({
+//     return_url: "https://example.com/payment/",
+//     website_url: "https://example.com/",
+//     amount: 1300,
+//     purchase_order_id: "test12",
+//     purchase_order_name: "test",
+//     customer_info: {
+//       name: "Khalti Bahadur",
+//       email: "example@gmail.com",
+//       phone: "9800000123",
+//     },
+//     amount_breakdown: [
+//       {
+//         label: "Mark Price",
+//         amount: 1000,
+//       },
+//       {
+//         label: "VAT",
+//         amount: 300,
+//       },
+//     ],
+//     product_details: [
+//       {
+//         identity: "1234567890",
+//         name: "Khalti logo",
+//         total_price: 1300,
+//         quantity: 1,
+//         unit_price: 1300,
+//       },
+//     ],
+//     merchant_username: "merchant_name",
+//     merchant_extra: "merchant_extra",
+//   });
+
+//   const ff = await ins.paymentLookup({
+//     pidx,
+//   });
+
+//   if (ff.status === "Completed") {
+//     console.log("Payment Success");
+//   }
+
+//   console.log({ payment_url, pidx });
+// }