diff --git a/package-lock.json b/package-lock.json
index 980038a..4e7518c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@leanstacks/serverless-common",
-  "version": "1.2.0",
+  "version": "1.3.0-alpha.2",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "@leanstacks/serverless-common",
-      "version": "1.2.0",
+      "version": "1.3.0-alpha.2",
       "license": "MIT",
       "devDependencies": {
         "@aws-sdk/client-cognito-identity-provider": "^3.523.0",
diff --git a/package.json b/package.json
index 6ff4f5c..2801e33 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@leanstacks/serverless-common",
-  "version": "1.2.0",
+  "version": "1.3.0-alpha.2",
   "description": "LeanStacks organization common serverless components.",
   "main": "dist/cjs/index.js",
   "module": "dist/esm/index.js",
diff --git a/src/utils/middyfy.ts b/src/utils/middyfy.ts
index 14ba0f0..91f8ae9 100644
--- a/src/utils/middyfy.ts
+++ b/src/utils/middyfy.ts
@@ -3,6 +3,9 @@ import httpEventNormalizer from '@middy/http-event-normalizer';
 import jsonBodyParser from '@middy/http-json-body-parser';
 import {
   APIGatewayProxyEvent,
+  APIGatewayProxyEventBase,
+  APIGatewayProxyEventPathParameters,
+  APIGatewayProxyEventQueryStringParameters,
   APIGatewayProxyResult,
   Context,
   ScheduledEvent,
@@ -16,11 +19,58 @@ import { loggerInitializer } from '../middlewares/logger-initializer';
 import { validator } from '../middlewares/validator-joi';
 import { httpErrorHandler } from '../middlewares/error-handler-http';
 
+/**
+ * An API Gateway authorizer context for requests authorized with the
+ * LeanStacks client token.
+ */
+export type LSAPIClientAuthorizerContext = {
+  preferred_username: string;
+};
+
+/**
+ * An API Gateway authorizer context for requests authorized with a
+ * Cognito token.
+ */
+export type LSCognitoAuthorizerContext = {
+  email: string;
+  family_name: string;
+  given_name: string;
+  permissions: {
+    [teamId: string]: string[];
+  };
+  preferred_username: string;
+  user_id: string;
+};
+
+/**
+ * An API Gateway event which has been normalized by middleware.
+ * @template TAuthorizerContext - The authorizer context type.
+ * @template TBody - Optional. The body type. Default: `null`.
+ * @template TPathParameters - Optional. The path parameters type. Default: `APIGatewayProxyEventPathParameters`.
+ * @template TQueryString - Optional. The query string parameters type. Default: `APIGatewayProxyEventQueryStringParameters`.
+ * @see {@link APIGatewayProxyEventBase}
+ * @see {@link APIGatewayProxyEventPathParameters}
+ * @see {@link APIGatewayProxyEventQueryStringParameters}
+ */
+export type NormalizedAPIGatewayProxyEvent<
+  TAuthorizerContext,
+  TBody = null,
+  TPathParameters = APIGatewayProxyEventPathParameters,
+  TQueryString = APIGatewayProxyEventQueryStringParameters,
+> = Omit<
+  APIGatewayProxyEventBase<TAuthorizerContext>,
+  'body' | 'pathParameters' | 'queryStringParameters'
+> & {
+  body: TBody;
+  pathParameters: TPathParameters;
+  queryStringParameters: TQueryString;
+};
+
 /**
  * The AWS Lambda handler function signature for API Gateway proxy events.
  */
-export type APIGatewayHandlerFn = (
-  event: APIGatewayProxyEvent,
+export type APIGatewayHandlerFn<TEvent = APIGatewayProxyEvent> = (
+  event: TEvent,
   context: Context,
 ) => Promise<APIGatewayProxyResult>;