diff --git a/package.json b/package.json
index 2c61ba9..c48115d 100644
--- a/package.json
+++ b/package.json
@@ -17,14 +17,28 @@
   "license": "ISC",
   "dependencies": {
     "fast-glob": "^3.2.11",
-    "graphql": "^16.5.0"
+    "graphql": "^16.5.0",
+    "retes": "^0.26.0"
   },
   "devDependencies": {
     "@types/node": "^17.0.35",
     "tsm": "^2.2.1",
-    "tsup": "^5.12.8",
+    "tsup": "^6.0.1",
     "typescript": "^4.7.2",
     "uvu": "^0.5.3",
     "watchlist": "^0.3.1"
+  },
+  "exports": {
+    "./package.json": "./package.json",
+    "./middleware": {
+      "types": "./middleware.d.ts",
+      "import": "./middleware.mjs",
+      "require": "./middleware.js"
+    },
+    ".": {
+      "types": "./index.d.ts",
+      "import": "./index.mjs",
+      "require": "./index.js"
+    }
   }
 }
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 63eb4b7..fcf2a51 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -4,8 +4,9 @@ specifiers:
   '@types/node': ^17.0.35
   fast-glob: ^3.2.11
   graphql: ^16.5.0
+  retes: ^0.26.0
   tsm: ^2.2.1
-  tsup: ^5.12.8
+  tsup: ^6.0.1
   typescript: ^4.7.2
   uvu: ^0.5.3
   watchlist: ^0.3.1
@@ -13,12 +14,13 @@ specifiers:
 dependencies:
   fast-glob: 3.2.11
   graphql: 16.5.0
-  typescript: 4.7.2
+  retes: 0.26.0
 
 devDependencies:
   '@types/node': 17.0.35
   tsm: 2.2.1
-  tsup: 5.12.8_typescript@4.7.2
+  tsup: 6.0.1_typescript@4.7.2
+  typescript: 4.7.2
   uvu: 0.5.3
   watchlist: 0.3.1
 
@@ -95,6 +97,13 @@ packages:
       load-tsconfig: 0.2.3
     dev: true
 
+  /busboy/1.6.0:
+    resolution: {integrity: sha512-8SFQbg/0hQ9xy3UNTB0YEnsNBbWfhf7RtnzpL7TkBiTBRfrQ9Fxcnz7VJsleJpyp6rVLvXiuORqjlHi5q+PYuA==}
+    engines: {node: '>=10.16.0'}
+    dependencies:
+      streamsearch: 1.1.0
+    dev: false
+
   /cac/6.7.12:
     resolution: {integrity: sha512-rM7E2ygtMkJqD9c7WnFU6fruFcN3xe4FM5yUmgxhZzIKJk4uHl9U/fhwdajGFQbQuv43FAUo1Fe8gX/oIKDeSA==}
     engines: {node: '>=8'}
@@ -669,6 +678,12 @@ packages:
     engines: {node: '>=8'}
     dev: true
 
+  /retes/0.26.0:
+    resolution: {integrity: sha512-hF8B2/ccHysMhBrYAkzOGWK2OmkFR/7efkbB0G3Hj7ePDUdKv0Ki8iQjoJOPkw+q2QIQ8fbPVY5VC2OwheNODg==}
+    dependencies:
+      busboy: 1.6.0
+    dev: false
+
   /reusify/1.0.4:
     resolution: {integrity: sha512-U9nH88a3fc/ekCF1l0/UP1IosiuIjyTh7hBvXVMHYgVcfGvt897Xguj2UOLDeI5BG2m7/uwyaLVT6fbtCwTyzw==}
     engines: {iojs: '>=1.0.0', node: '>=0.10.0'}
@@ -721,6 +736,11 @@ packages:
       whatwg-url: 7.1.0
     dev: true
 
+  /streamsearch/1.1.0:
+    resolution: {integrity: sha512-Mcc5wHehp9aXz1ax6bZUyY5afg9u2rv5cqQI3mRrYkGC8rW2hM02jWuwjtL++LS5qinSyhj2QfLyNsuc+VsExg==}
+    engines: {node: '>=10.0.0'}
+    dev: false
+
   /strip-final-newline/2.0.0:
     resolution: {integrity: sha512-BrpvfNAE3dcvq7ll3xVumzjKjZQ5tI1sEUIKr3Uoks0XUl45St3FlatVqef9prk4jRDzhW6WZg+3bk93y6pLjA==}
     engines: {node: '>=6'}
@@ -781,12 +801,19 @@ packages:
       esbuild: 0.14.39
     dev: true
 
-  /tsup/5.12.8_typescript@4.7.2:
-    resolution: {integrity: sha512-fSBzUBtrnAQ+XKPfj1KcZ2Pl0EUlKBqpbTmRAs+2mL34fQlowrm6ccQgOYyMe9MMAcejMP6/7Rw3qKjx1lreZA==}
+  /tsup/6.0.1_typescript@4.7.2:
+    resolution: {integrity: sha512-2Pl1YkEEvzfg4aYgwUILaHV0wwZQKO7mNHMQChyzdCNlQqf11eug7gWk86XCb3CvRofCXBX87x73BTGjyS3cOQ==}
+    engines: {node: '>=14'}
     hasBin: true
     peerDependencies:
+      '@swc/core': ^1
+      postcss: ^8.4.12
       typescript: ^4.1.0
     peerDependenciesMeta:
+      '@swc/core':
+        optional: true
+      postcss:
+        optional: true
       typescript:
         optional: true
     dependencies:
@@ -806,7 +833,6 @@ packages:
       tree-kill: 1.2.2
       typescript: 4.7.2
     transitivePeerDependencies:
-      - postcss
       - supports-color
       - ts-node
     dev: true
@@ -815,6 +841,7 @@ packages:
     resolution: {integrity: sha512-Mamb1iX2FDUpcTRzltPxgWMKy3fhg0TN378ylbktPGPK/99KbDtMQ4W1hwgsbPAsG3a0xKa1vmw4VKZQbkvz5A==}
     engines: {node: '>=4.2.0'}
     hasBin: true
+    dev: true
 
   /uvu/0.5.3:
     resolution: {integrity: sha512-brFwqA3FXzilmtnIyJ+CxdkInkY/i4ErvP7uV0DnUVxQcQ55reuHphorpF+tZoVHK2MniZ/VJzI7zJQoc9T9Yw==}
diff --git a/src/const.ts b/src/const.ts
new file mode 100644
index 0000000..a7f264b
--- /dev/null
+++ b/src/const.ts
@@ -0,0 +1,2 @@
+export const SALEOR_DOMAIN_HEADER = "saleor-domain";
+export const SALEOR_EVENT_HEADER = "saleor-event";
\ No newline at end of file
diff --git a/src/middleware.ts b/src/middleware.ts
new file mode 100644
index 0000000..ac49495
--- /dev/null
+++ b/src/middleware.ts
@@ -0,0 +1,43 @@
+import type { Middleware } from "retes";
+
+import { Response } from 'retes/response';
+
+import * as Const from './const';
+
+export const withBaseURL: Middleware = (handler) => async (request) => {
+  const { host, "x-forwarded-proto": protocol = "http" } = request.headers;
+
+  request.context.baseURL = `${protocol}://${host}`;
+
+  const response = await handler(request);
+  return response;
+}
+
+export const withSaleorDomainPresent: Middleware = (handler) => async (request) => {
+  const saleor_domain = request.headers[Const.SALEOR_DOMAIN_HEADER];
+
+  if (!saleor_domain) {
+    return Response.BadRequest({ success: false, message: "Missing Saleor domain header." });
+  }
+
+  return handler(request);
+};
+
+export const withSaleorEventMatch = (expectedEvent: string): Middleware => (handler) => async (request) => {
+  const receivedEvent = request.headers[Const.SALEOR_EVENT_HEADER];
+
+  if (receivedEvent !== expectedEvent) {
+    return Response.BadRequest({ success: false, message: "Invalid Saleor Event" });
+  }
+
+  return handler(request);
+};
+
+export const withAuthTokenRequired: Middleware = (handler) => async (request) => {
+  const auth_token = request.params.auth_token;
+  if (!auth_token) {
+    return Response.BadRequest({ success: false, message: "Missing auth token." });
+  }
+
+  return handler(request);
+};
\ No newline at end of file