diff --git a/packages/doorman-api/src/functions/api/door/checkOtp.ts b/packages/doorman-api/src/functions/api/door/checkOtp.ts
new file mode 100644
index 0000000..abce8cc
--- /dev/null
+++ b/packages/doorman-api/src/functions/api/door/checkOtp.ts
@@ -0,0 +1,53 @@
+/**
+ * Try to get buzzer number for a given OTP
+ */
+
+import { ServerlessEventObject, ServerlessFunctionSignature } from "@twilio-labs/serverless-runtime-types/types";
+import { TwilioContext } from "../../../types/TwilioContext";
+import { createDynaBridgeClient } from "../../../utils/ddb";
+import { withMetrics } from "../../../common/DoormanHandler";
+import { z } from "zod";
+import { UserAgentHeader } from "../../../utils/blockUserAgent";
+import { setResponseJson } from "../../../utils/responseUtils";
+import { getLogCallID } from "../../../schema/LogCall";
+import { isTTLInFuture } from "../../../common/TTLHelper";
+
+export const CheckOtpRequestSchema = z.object({
+  otp: z.string(),
+});
+
+export type CheckOtpRequest = z.infer<typeof CheckOtpRequestSchema>;
+export interface CheckOtpRequestTwilio extends ServerlessEventObject<CheckOtpRequest, UserAgentHeader> { };
+
+export const CheckOtpResponseSchema = z.object({
+  buzzer: z.string(),
+});
+
+export type CheckOtpResponse = z.infer<typeof CheckOtpResponseSchema>;
+
+export const handler: ServerlessFunctionSignature<TwilioContext, CheckOtpRequestTwilio> = withMetrics("checkotp", async (context, event, callback, metricsRegistry) => {
+  const response = new Twilio.Response();
+  const req = CheckOtpRequestSchema.parse(event);
+
+  let otp = req.otp;
+
+  const db = createDynaBridgeClient(context);
+
+  const log = await db.entities.logCall.findById(getLogCallID(otp));
+
+  if (!log || !isTTLInFuture(log)) {
+    setResponseJson(response, 404, {
+      msg: "OTP expired or not found",
+    })
+  } else {
+    setResponseJson(response, 200, {
+      buzzer: log.caller,
+    });
+  }
+
+  // destroy the internal client after
+  // @ts-ignore
+  db.ddbClient.destroy();
+
+  return callback(null, response);
+});
diff --git a/packages/doorman-api/tst/integ-local.test.ts b/packages/doorman-api/tst/integ-local.test.ts
index c72e5d0..2d2c017 100644
--- a/packages/doorman-api/tst/integ-local.test.ts
+++ b/packages/doorman-api/tst/integ-local.test.ts
@@ -5,6 +5,7 @@ import { StatusResponse } from "../src/functions/api/door/status";
 import { sleep } from "bun";
 import { ONBOARDING_DOOR_NAME, ONBOARDING_DOOR_PIN } from "../src/schema/DoorConfig";
 import { LogCallResponse } from "../src/functions/api/door/logCall";
+import { CheckOtpResponse } from "../src/functions/api/door/checkOtp";
 
 // these tests should only run locally
 if (process.env.STAGE === 'staging') {
@@ -109,7 +110,15 @@ describe("call log path works", () => {
     expect(logCallRes.status).toBe(200);
 
     const otp = (await logCallRes.json() as LogCallResponse).otp
-    expect(otp.length).toBe(4)
+    expect(otp.length).toBe(4);
+
+    const checkOtpRes = await fetch(baseUrl + `/api/door/checkOtp?otp=${otp}`);
+
+    expect(checkOtpRes.status).toBe(200);
+
+    // check OTP 
+    const caller = (await checkOtpRes.json() as CheckOtpResponse).buzzer;
+    expect(caller).toBe(buzzerNumber);
   });
 
   test("call log after door closed, should not return OTP", async () => {