diff --git a/api/main_endpoints/routes/MembershipPayment.js b/api/main_endpoints/routes/MembershipPayment.js
new file mode 100644
index 000000000..093dd8817
--- /dev/null
+++ b/api/main_endpoints/routes/MembershipPayment.js
@@ -0,0 +1,71 @@
+const express = require('express');
+const router = express.Router();
+const bodyParser = require('body-parser');
+router.use(bodyParser.json());
+const {
+  BAD_REQUEST,
+  SERVER_ERROR,
+  NOT_FOUND,
+  OK,
+} = require('../../util/constants').STATUS_CODES;
+const membershipState = require('../../util/constants').MEMBERSHIP_STATE;
+const User = require('../models/User');
+const { getMemberExpirationDate, updateMembershipExpiration } = require('../util/userHelpers');
+const { findVerifyPayment, rejectPayment } = require('../util/membershipPaymentQueries');
+const { decodeToken } = require('../util/token-functions.js');
+
+router.post('/verifyMembership', async (req, res) => {
+  const decoded = await decodeToken(req, membershipState.PENDING);
+  if (decoded.status !== OK) {
+    return res.sendStatus(decoded.status);
+  }
+
+  const { confirmationCode } = req.body;
+  const userId = decoded.token._id;
+
+  if (!confirmationCode) {
+    return res.sendStatus(BAD_REQUEST);
+  }
+
+  const paymentDocument = await findVerifyPayment(confirmationCode, userId);
+  if (paymentDocument === null){
+    return res.sendStatus(SERVER_ERROR);
+  }
+  if (paymentDocument === false){
+    return res.sendStatus(NOT_FOUND);
+  }
+
+  const paymentId = paymentDocument._id;
+  const { amount } = paymentDocument;
+
+  if (amount < 20){
+    const rejected = await rejectPayment(paymentId);
+    if (rejected === null){
+      return res.sendStatus(SERVER_ERROR);
+    }
+    if (rejected === false){
+      return res.sendStatus(NOT_FOUND);
+    }
+    return res.sendStatus(BAD_REQUEST);
+  }
+
+  let semestersToAdd = 0;
+  if (amount >= 30) {
+    semestersToAdd = 2;
+  } else {
+    semestersToAdd = 1;
+  }
+
+  const membershipUpdateResult = await updateMembershipExpiration(
+    decoded.token._id,
+    semestersToAdd
+  );
+
+  if (membershipUpdateResult === null) {
+    return res.sendStatus(SERVER_ERROR);
+  }
+  if (membershipUpdateResult === false) {
+    return res.status(NOT_FOUND).send('User not found.');
+  }
+  return res.sendStatus(OK);
+});
diff --git a/api/main_endpoints/util/membershipPaymentQueries.js b/api/main_endpoints/util/membershipPaymentQueries.js
new file mode 100644
index 000000000..27361c2ba
--- /dev/null
+++ b/api/main_endpoints/util/membershipPaymentQueries.js
@@ -0,0 +1,62 @@
+import MembershipPayment from '../main_endpoints/models/MembershipPayment.js';
+
+const status = {
+  PENDING: 'pending',
+  COMPLETED: 'completed',
+  REJECTED: 'rejected',
+};
+
+function findVerifyPayment(confirmationCode, userId) {
+  return new Promise((resolve) => {
+    try {
+      MembershipPayment.findOneAndUpdate(
+        {
+          confirmationCode,
+          status: status.PENDING,
+        },
+        {
+          $set: { userId, status: status.COMPLETED },
+        },
+        {
+          new: true,
+          runValidators: true,
+        },
+        (error, result) => {
+          if (error) {
+            return resolve(null);
+          }
+          if (!result) {
+            return resolve(false);
+          }
+          return resolve(result);
+        }
+      );
+    } catch (error) {
+      return resolve(null);
+    }
+  });
+}
+
+function rejectPayment(paymentId) {
+  return new Promise((resolve) => {
+    try {
+      MembershipPayment.findByIdAndUpdate(
+        paymentId,
+        { $set: { status: status.REJECTED } },
+        (error, result) => {
+          if (error) {
+            return resolve(null);
+          }
+          if (!result) {
+            return resolve(false);
+          }
+          return resolve(true);
+        }
+      );
+    } catch (error) {
+      return resolve(null);
+    }
+  });
+}
+
+module.exports = { findVerifyPayment, rejectPayment };
diff --git a/api/main_endpoints/util/userHelpers.js b/api/main_endpoints/util/userHelpers.js
index 8ac327872..022aa9abc 100644
--- a/api/main_endpoints/util/userHelpers.js
+++ b/api/main_endpoints/util/userHelpers.js
@@ -203,6 +203,30 @@ function checkIfPageCountResets(lastLogin) {
   return lastLoginWasOverOneWeekAgo || aSundayHasPassedSinceLastLogin;
 }
 
+/**
+ * Update a user's membershipValidUntil date
+ * @param {String} userId - The user's ID
+ * @param {Number} numberOfSemestersToSignUpFor - Number of semesters to extend
+ * @returns {Object} result - Contains success status and message
+ */
+async function updateMembershipExpiration(userId, numberOfSemestersToSignUpFor) {
+  try {
+    const newExpiration = getMemberExpirationDate(numberOfSemestersToSignUpFor);
+    const user = await User.findByIdAndUpdate(
+      userId,
+      { membershipValidUntil: newExpiration },
+      { new: true },
+    );
+    if (!user) {
+      return false;
+    }
+    return true;
+  } catch (error) {
+    logger.error('Error updating membership:', error);
+    return null;
+  }
+}
+
 module.exports = {
   registerUser,
   getMemberExpirationDate,
@@ -211,4 +235,5 @@ module.exports = {
   userWithEmailExists,
   checkIfPageCountResets,
   findPasswordReset,
+  updateMembershipExpiration
 };