diff --git a/.env.example b/.env.example
index 9d3259b328..8ccabe455b 100644
--- a/.env.example
+++ b/.env.example
@@ -297,7 +297,7 @@ E2E_TEST_CALCOM_GCAL_KEYS=
 # You can use: `openssl rand -base64 32` to generate one
 CALCOM_CREDENTIAL_SYNC_SECRET=""
 # This is the header name that will be used to verify the webhook secret. Should be in lowercase
-CALCOM_CREDENTIAL_SYNC_SECRET_HEADER_NAME="calcom-webhook-secret"
+CALCOM_CREDENTIAL_SYNC_HEADER_NAME="calcom-credential-sync-secret"
 CALCOM_CREDENTIAL_SYNC_ENDPOINT=""
 # Key should match on Cal.com and your application
 # must be 24 bytes for AES256 encryption algorithm
diff --git a/apps/api/lib/helpers/verifyCredentialSyncEnabled.ts b/apps/api/lib/helpers/verifyCredentialSyncEnabled.ts
new file mode 100644
index 0000000000..a797bb2db2
--- /dev/null
+++ b/apps/api/lib/helpers/verifyCredentialSyncEnabled.ts
@@ -0,0 +1,24 @@
+import type { NextMiddleware } from "next-api-middleware";
+
+import { APP_CREDENTIAL_SHARING_ENABLED } from "@calcom/lib/constants";
+
+export const verifyCredentialSyncEnabled: NextMiddleware = async (req, res, next) => {
+  const { isAdmin } = req;
+
+  if (!isAdmin) {
+    return res.status(403).json({ error: "Only admin API keys can access credential syncing endpoints" });
+  }
+
+  if (!APP_CREDENTIAL_SHARING_ENABLED) {
+    return res.status(501).json({ error: "Credential syncing is not enabled" });
+  }
+
+  if (
+    req.headers[process.env.CALCOM_CREDENTIAL_SYNC_HEADER_NAME || "calcom-credential-sync-secret"] !==
+    process.env.CALCOM_CREDENTIAL_SYNC_SECRET
+  ) {
+    return res.status(401).json({ message: "Invalid credential sync secret" });
+  }
+
+  await next();
+};
diff --git a/apps/api/lib/helpers/withMiddleware.ts b/apps/api/lib/helpers/withMiddleware.ts
index 43fcb46f88..b0d0922afb 100644
--- a/apps/api/lib/helpers/withMiddleware.ts
+++ b/apps/api/lib/helpers/withMiddleware.ts
@@ -13,6 +13,7 @@ import {
 } from "./httpMethods";
 import { rateLimitApiKey } from "./rateLimitApiKey";
 import { verifyApiKey } from "./verifyApiKey";
+import { verifyCredentialSyncEnabled } from "./verifyCredentialSyncEnabled";
 import { withPagination } from "./withPagination";
 
 const middleware = {
@@ -28,6 +29,7 @@ const middleware = {
   extendRequest,
   pagination: withPagination,
   captureErrors,
+  verifyCredentialSyncEnabled,
 };
 
 type Middleware = keyof typeof middleware;
diff --git a/apps/api/lib/validations/credential-sync.ts b/apps/api/lib/validations/credential-sync.ts
new file mode 100644
index 0000000000..04e248c047
--- /dev/null
+++ b/apps/api/lib/validations/credential-sync.ts
@@ -0,0 +1,64 @@
+import { z } from "zod";
+
+import { HttpError } from "@calcom/lib/http-error";
+
+const userId = z.string().transform((val) => {
+  const userIdInt = parseInt(val);
+
+  if (isNaN(userIdInt)) {
+    throw new HttpError({ message: "userId is not a valid number", statusCode: 400 });
+  }
+
+  return userIdInt;
+});
+const appSlug = z.string();
+const credentialId = z.string().transform((val) => {
+  const credentialIdInt = parseInt(val);
+
+  if (isNaN(credentialIdInt)) {
+    throw new HttpError({ message: "credentialId is not a valid number", statusCode: 400 });
+  }
+
+  return credentialIdInt;
+});
+const encryptedKey = z.string();
+
+export const schemaCredentialGetParams = z.object({
+  userId,
+  appSlug: appSlug.optional(),
+});
+
+export const schemaCredentialPostParams = z.object({
+  userId,
+  createSelectedCalendar: z
+    .string()
+    .optional()
+    .transform((val) => {
+      return val === "true";
+    }),
+  createDestinationCalendar: z
+    .string()
+    .optional()
+    .transform((val) => {
+      return val === "true";
+    }),
+});
+
+export const schemaCredentialPostBody = z.object({
+  appSlug,
+  encryptedKey,
+});
+
+export const schemaCredentialPatchParams = z.object({
+  userId,
+  credentialId,
+});
+
+export const schemaCredentialPatchBody = z.object({
+  encryptedKey,
+});
+
+export const schemaCredentialDeleteParams = z.object({
+  userId,
+  credentialId,
+});
diff --git a/apps/api/pages/api/credential-sync/_delete.ts b/apps/api/pages/api/credential-sync/_delete.ts
new file mode 100644
index 0000000000..cfcbd719b0
--- /dev/null
+++ b/apps/api/pages/api/credential-sync/_delete.ts
@@ -0,0 +1,64 @@
+import type { NextApiRequest } from "next";
+
+import { defaultResponder } from "@calcom/lib/server";
+
+import { schemaCredentialDeleteParams } from "~/lib/validations/credential-sync";
+
+/**
+ * @swagger
+ * /credential-sync:
+ *   delete:
+ *     operationId: deleteUserAppCredential
+ *     summary: Delete a credential record for a user
+ *     parameters:
+ *       - in: query
+ *         name: apiKey
+ *         required: true
+ *         schema:
+ *           type: string
+ *         description: Your API key
+ *       - in: query
+ *         name: userId
+ *         required: true
+ *         schema:
+ *           type: string
+ *         description: ID of the user to fetch the credentials for
+ *       - in: query
+ *         name: credentialId
+ *         required: true
+ *         schema:
+ *           type: string
+ *         description: ID of the credential to update
+ *     tags:
+ *     - credentials
+ *     responses:
+ *       200:
+ *         description: OK
+ *       401:
+ *        description: Authorization information is missing or invalid.
+ *       505:
+ *        description: Credential syncing not enabled
+ */
+async function handler(req: NextApiRequest) {
+  const { prisma } = req;
+
+  const { userId: reqUserId, credentialId: reqCredentialId } = schemaCredentialDeleteParams.parse(req.query);
+
+  const userId = parseInt(reqUserId);
+  const credentialId = parseInt(reqCredentialId);
+
+  const credential = await prisma.credential.delete({
+    where: {
+      id: credentialId,
+      userId,
+    },
+    select: {
+      id: true,
+      appId: true,
+    },
+  });
+
+  return { credentialDeleted: credential };
+}
+
+export default defaultResponder(handler);
diff --git a/apps/api/pages/api/credential-sync/_get.ts b/apps/api/pages/api/credential-sync/_get.ts
new file mode 100644
index 0000000000..b2d56102c4
--- /dev/null
+++ b/apps/api/pages/api/credential-sync/_get.ts
@@ -0,0 +1,63 @@
+import type { NextApiRequest } from "next";
+
+import { defaultResponder } from "@calcom/lib/server";
+
+import { schemaCredentialGetParams } from "~/lib/validations/credential-sync";
+
+/**
+ * @swagger
+ * /credential-sync:
+ *   get:
+ *     operationId: getUserAppCredentials
+ *     summary: Get all app credentials for a user
+ *     parameters:
+ *       - in: query
+ *         name: apiKey
+ *         required: true
+ *         schema:
+ *           type: string
+ *         description: Your API key
+ *       - in: query
+ *         name: userId
+ *         required: true
+ *         schema:
+ *           type: string
+ *         description: ID of the user to fetch the credentials for
+ *     tags:
+ *     - credentials
+ *     responses:
+ *       200:
+ *         description: OK
+ *       401:
+ *        description: Authorization information is missing or invalid.
+ *       505:
+ *        description: Credential syncing not enabled
+ */
+async function handler(req: NextApiRequest) {
+  const { prisma } = req;
+
+  const { appSlug, userId } = schemaCredentialGetParams.parse(req.query);
+
+  let credentials = await prisma.credential.findMany({
+    where: {
+      userId,
+      ...(appSlug && { appId: appSlug }),
+    },
+    select: {
+      id: true,
+      appId: true,
+    },
+  });
+
+  //   For apps we're transitioning to using the term slug to keep things consistent
+  credentials = credentials.map((credential) => {
+    return {
+      ...credential,
+      appSlug: credential.appId,
+    };
+  });
+
+  return { credentials };
+}
+
+export default defaultResponder(handler);
diff --git a/apps/api/pages/api/credential-sync/_patch.ts b/apps/api/pages/api/credential-sync/_patch.ts
new file mode 100644
index 0000000000..3ccd20d35a
--- /dev/null
+++ b/apps/api/pages/api/credential-sync/_patch.ts
@@ -0,0 +1,86 @@
+import type { NextApiRequest } from "next";
+
+import { minimumTokenResponseSchema } from "@calcom/app-store/_utils/oauth/parseRefreshTokenResponse";
+import { symmetricDecrypt } from "@calcom/lib/crypto";
+import { defaultResponder } from "@calcom/lib/server";
+
+import { schemaCredentialPatchParams, schemaCredentialPatchBody } from "~/lib/validations/credential-sync";
+
+/**
+ * @swagger
+ * /credential-sync:
+ *   patch:
+ *     operationId: updateUserAppCredential
+ *     summary: Update a credential record for a user
+ *     parameters:
+ *       - in: query
+ *         name: apiKey
+ *         required: true
+ *         schema:
+ *           type: string
+ *         description: Your API key
+ *       - in: query
+ *         name: userId
+ *         required: true
+ *         schema:
+ *           type: string
+ *         description: ID of the user to fetch the credentials for
+ *       - in: query
+ *         name: credentialId
+ *         required: true
+ *         schema:
+ *           type: string
+ *         description: ID of the credential to update
+ *     tags:
+ *     - credentials
+ *     requestBody:
+ *       description: Update a new credential
+ *       required: true
+ *       content:
+ *         application/json:
+ *           schema:
+ *             type: object
+ *             required:
+ *               - encryptedKey
+ *             properties:
+ *               encryptedKey:
+ *                 type: string
+ *     responses:
+ *       200:
+ *         description: OK
+ *       401:
+ *        description: Authorization information is missing or invalid.
+ *       505:
+ *        description: Credential syncing not enabled
+ */
+async function handler(req: NextApiRequest) {
+  const { prisma } = req;
+
+  const { userId, credentialId } = schemaCredentialPatchParams.parse(req.query);
+
+  const { encryptedKey } = schemaCredentialPatchBody.parse(req.body);
+
+  const decryptedKey = JSON.parse(
+    symmetricDecrypt(encryptedKey, process.env.CALCOM_APP_CREDENTIAL_ENCRYPTION_KEY || "")
+  );
+
+  const key = minimumTokenResponseSchema.parse(decryptedKey);
+
+  const credential = await prisma.credential.update({
+    where: {
+      id: credentialId,
+      userId,
+    },
+    data: {
+      key,
+    },
+    select: {
+      id: true,
+      appId: true,
+    },
+  });
+
+  return { credential };
+}
+
+export default defaultResponder(handler);
diff --git a/apps/api/pages/api/credential-sync/_post.ts b/apps/api/pages/api/credential-sync/_post.ts
new file mode 100644
index 0000000000..a7e5b85137
--- /dev/null
+++ b/apps/api/pages/api/credential-sync/_post.ts
@@ -0,0 +1,142 @@
+import type { NextApiRequest } from "next";
+
+import { getCalendar } from "@calcom/app-store/_utils/getCalendar";
+import { minimumTokenResponseSchema } from "@calcom/app-store/_utils/oauth/parseRefreshTokenResponse";
+import { appStoreMetadata } from "@calcom/app-store/appStoreMetaData";
+import { symmetricDecrypt } from "@calcom/lib/crypto";
+import { HttpError } from "@calcom/lib/http-error";
+import { defaultResponder } from "@calcom/lib/server";
+
+import { schemaCredentialPostParams, schemaCredentialPostBody } from "~/lib/validations/credential-sync";
+
+/**
+ * @swagger
+ * /credential-sync:
+ *   post:
+ *     operationId: createUserAppCredential
+ *     summary: Create a credential record for a user
+ *     parameters:
+ *       - in: query
+ *         name: apiKey
+ *         required: true
+ *         schema:
+ *           type: string
+ *         description: Your API key
+ *       - in: query
+ *         name: userId
+ *         required: true
+ *         schema:
+ *           type: string
+ *         description: ID of the user to fetch the credentials for
+ *     tags:
+ *     - credentials
+ *     requestBody:
+ *       description: Create a new credential
+ *       required: true
+ *       content:
+ *         application/json:
+ *           schema:
+ *             type: object
+ *             required:
+ *               - encryptedKey
+ *               - appSlug
+ *             properties:
+ *               encryptedKey:
+ *                 type: string
+ *               appSlug:
+ *                type: string
+ *     responses:
+ *       200:
+ *         description: OK
+ *       401:
+ *        description: Authorization information is missing or invalid.
+ *       505:
+ *        description: Credential syncing not enabled
+ */
+async function handler(req: NextApiRequest) {
+  const { prisma } = req;
+
+  if (!req.body) {
+    throw new HttpError({ message: "Request body is missing", statusCode: 400 });
+  }
+
+  const { userId, createSelectedCalendar, createDestinationCalendar } = schemaCredentialPostParams.parse(
+    req.query
+  );
+
+  const { appSlug, encryptedKey } = schemaCredentialPostBody.parse(req.body);
+
+  const decryptedKey = JSON.parse(
+    symmetricDecrypt(encryptedKey, process.env.CALCOM_APP_CREDENTIAL_ENCRYPTION_KEY || "")
+  );
+
+  const key = minimumTokenResponseSchema.parse(decryptedKey);
+
+  // Need to get app type
+  const app = await prisma.app.findUnique({
+    where: { slug: appSlug },
+    select: { dirName: true, categories: true },
+  });
+
+  if (!app) {
+    throw new HttpError({ message: "App not found", statusCode: 500 });
+  }
+
+  const createCalendarResources =
+    app.categories.some((category) => category === "calendar") &&
+    (createSelectedCalendar || createDestinationCalendar);
+
+  const appMetadata = appStoreMetadata[app.dirName as keyof typeof appStoreMetadata];
+
+  const credential = await prisma.credential.create({
+    data: {
+      userId,
+      appId: appSlug,
+      key,
+      type: appMetadata.type,
+    },
+    include: {
+      user: {
+        select: {
+          email: true,
+        },
+      },
+    },
+  });
+
+  if (createCalendarResources) {
+    const calendar = await getCalendar(credential);
+    const calendars = await calendar.listCalendars();
+
+    const calendarToCreate = calendars.find((calendar) => calendar.primary) || calendars[0];
+
+    if (createSelectedCalendar) {
+      await prisma.selectedCalendar.createMany({
+        data: [
+          {
+            userId,
+            integration: appMetadata.type,
+            externalId: calendarToCreate.externalId,
+            credentialId: credential.id,
+          },
+        ],
+        skipDuplicates: true,
+      });
+    }
+    if (createDestinationCalendar) {
+      await prisma.destinationCalendar.create({
+        data: {
+          integration: appMetadata.type,
+          externalId: calendarToCreate.externalId,
+          credential: { connect: { id: credential.id } },
+          primaryEmail: calendarToCreate.email || credential.user.email,
+          user: { connect: { id: userId } },
+        },
+      });
+    }
+  }
+
+  return { credential: { id: credential.id, type: credential.type } };
+}
+
+export default defaultResponder(handler);
diff --git a/apps/api/pages/api/credential-sync/index.ts b/apps/api/pages/api/credential-sync/index.ts
new file mode 100644
index 0000000000..8def51c2bd
--- /dev/null
+++ b/apps/api/pages/api/credential-sync/index.ts
@@ -0,0 +1,12 @@
+import { defaultHandler } from "@calcom/lib/server";
+
+import { withMiddleware } from "~/lib/helpers/withMiddleware";
+
+export default withMiddleware("verifyCredentialSyncEnabled")(
+  defaultHandler({
+    GET: import("./_get"),
+    POST: import("./_post"),
+    PATCH: import("./_patch"),
+    DELETE: import("./_delete"),
+  })
+);
diff --git a/packages/app-store/_utils/oauth/parseRefreshTokenResponse.ts b/packages/app-store/_utils/oauth/parseRefreshTokenResponse.ts
index 958205707a..c148234ffa 100644
--- a/packages/app-store/_utils/oauth/parseRefreshTokenResponse.ts
+++ b/packages/app-store/_utils/oauth/parseRefreshTokenResponse.ts
@@ -2,13 +2,20 @@ import { z } from "zod";
 
 import { APP_CREDENTIAL_SHARING_ENABLED } from "@calcom/lib/constants";
 
-const minimumTokenResponseSchema = z.object({
-  access_token: z.string(),
-  //   Assume that any property with a number is the expiry
-  [z.string().toString()]: z.number(),
-  //   Allow other properties in the token response
-  [z.string().optional().toString()]: z.unknown().optional(),
-});
+export const minimumTokenResponseSchema = z
+  .object({
+    access_token: z.string(),
+  })
+  .passthrough()
+  .superRefine((tokenObject, ctx) => {
+    if (!Object.values(tokenObject).some((value) => typeof value === "number")) {
+      ctx.addIssue({
+        code: z.ZodIssueCode.custom,
+        message:
+          "Missing a field that defines a token expiry date. Check the specific app package to see how token expiry is defined.",
+      });
+    }
+  });
 
 export type ParseRefreshTokenResponse<S extends z.ZodTypeAny> =
   | z.infer<S>
diff --git a/packages/lib/constants.ts b/packages/lib/constants.ts
index bf251817a2..e689309efb 100644
--- a/packages/lib/constants.ts
+++ b/packages/lib/constants.ts
@@ -106,10 +106,11 @@ export const ORGANIZATION_MIN_SEATS = 30;
 export const IS_MAILHOG_ENABLED = process.env.E2E_TEST_MAILHOG_ENABLED === "1";
 export const CALCOM_VERSION = process.env.NEXT_PUBLIC_CALCOM_VERSION as string;
 
+export const APP_CREDENTIAL_SHARING_ENABLED =
+  !!process.env.CALCOM_CREDENTIAL_SYNC_SECRET && !!process.env.CALCOM_APP_CREDENTIAL_ENCRYPTION_KEY;
 export const CREDENTIAL_SYNC_SECRET = process.env.CALCOM_CREDENTIAL_SYNC_SECRET;
 export const CREDENTIAL_SYNC_SECRET_HEADER_NAME =
-  process.env.CALCOM_CREDENTIAL_SYNC_SECRET_HEADER_NAME || "calcom-credential-sync-secret";
-export const APP_CREDENTIAL_SHARING_ENABLED = CREDENTIAL_SYNC_SECRET && CREDENTIAL_SYNC_SECRET_HEADER_NAME;
+  process.env.CALCOM_CREDENTIAL_SYNC_HEADER_NAME || "calcom-credential-sync-secret";
 
 export const DEFAULT_LIGHT_BRAND_COLOR = "#292929";
 export const DEFAULT_DARK_BRAND_COLOR = "#fafafa";
diff --git a/turbo.json b/turbo.json
index 686658d1a6..a5174f8d29 100644
--- a/turbo.json
+++ b/turbo.json
@@ -229,7 +229,9 @@
     "CALCOM_QA_EMAIL",
     "CALCOM_QA_PASSWORD",
     "CALCOM_TELEMETRY_DISABLED",
+    "CALCOM_CREDENTIAL_SYNC_HEADER_NAME",
     "CALENDSO_ENCRYPTION_KEY",
+    "CALCOM_CREDENTIAL_SYNC_SECRET",
     "CI",
     "CLOSECOM_API_KEY",
     "CRON_API_KEY",