diff --git a/mailing-list-api/mailing-lists.js b/mailing-list-api/mailing-lists.js
deleted file mode 100644
index bc7c08a..0000000
--- a/mailing-list-api/mailing-lists.js
+++ /dev/null
@@ -1,8 +0,0 @@
-module.exports = {
-  staff: ["talea@techtonica.org", "michelle@techtonica.org"],
-  "cohort-h1-2020": [
-    "ali@techtonica.org",
-    "humail@techtonica.org",
-    "khadar@techtonica.org",
-  ],
-};
diff --git a/mailing-list-api/package.json b/mailing-list-api/package.json
index 8b70aaa..29d0ef3 100644
--- a/mailing-list-api/package.json
+++ b/mailing-list-api/package.json
@@ -1,9 +1,11 @@
 {
   "name": "@module-node/mailing-list-api",
+  "type": "module",
   "version": "1.0.0",
   "license": "CC-BY-SA-4.0",
   "description": "You must update this package",
   "scripts": {
+    "start": "nodemon src/server.js",
     "test": "jest"
   },
   "repository": {
@@ -15,6 +17,11 @@
   },
   "homepage": "https://github.com/CodeYourFuture/CYF-Coursework-Template#readme",
   "devDependencies": {
-    "jest": "^26.6.3"
+    "jest": "^26.6.3",
+    "nodemon": "^3.1.0"
+  },
+  "dependencies": {
+    "dotenv": "^16.4.5",
+    "express": "^4.19.2"
   }
 }
diff --git a/mailing-list-api/src/app.js b/mailing-list-api/src/app.js
new file mode 100644
index 0000000..4121ba4
--- /dev/null
+++ b/mailing-list-api/src/app.js
@@ -0,0 +1,19 @@
+import express from "express";
+import cors from "cors";
+import readFileMiddleware from "./middlewares/readFileMiddleware.js";
+import { resolveFilePath } from "./utils/resolveFilePath.js";
+import allListRouter from "./routers/allListRoute.js";
+
+const app = express();
+
+app.use(express.json());
+app.use(cors());
+
+app.get("/", (req, res) => {
+  res.send(
+    'please go to \n/list ---> for all group names \n/list/:name ---> for mail list of a group of members\nyou can delete or update a group as well \n(please provide group name and members for update method as below)\n ---> {"name": "group-name","members": ["me@me.com", ...]}'
+  );
+});
+app.use("/lists", readFileMiddleware(resolveFilePath()), allListRouter);
+
+export { app };
diff --git a/mailing-list-api/src/data/mailing-lists.json b/mailing-list-api/src/data/mailing-lists.json
new file mode 100644
index 0000000..c46e6c4
--- /dev/null
+++ b/mailing-list-api/src/data/mailing-lists.json
@@ -0,0 +1,17 @@
+{
+  "staff": [
+    "talea@techtonica.org",
+    "michelle@techtonica.org"
+  ],
+  "cohort-h1-2020": [
+    "ali@techtonica.org",
+    "humail@techtonica.org",
+    "khadar@techtonica.org"
+  ],
+  "my-new-list": [
+    "me@me.com.uk"
+  ],
+  "test1": [
+    "me@me.com"
+  ]
+}
\ No newline at end of file
diff --git a/mailing-list-api/src/middlewares/readFileMiddleware.js b/mailing-list-api/src/middlewares/readFileMiddleware.js
new file mode 100644
index 0000000..1ab315a
--- /dev/null
+++ b/mailing-list-api/src/middlewares/readFileMiddleware.js
@@ -0,0 +1,14 @@
+import fs from "fs";
+
+const readFileMiddleware = (absoluteFilePath) => (req, res, next) => {
+  fs.readFile(absoluteFilePath, "utf8", (err, data) => {
+    if (err) {
+      return next(err);
+    }
+    const lists = new Map(Object.entries(JSON.parse(data)));
+    req.fileContent = lists;
+    next();
+  });
+};
+
+export default readFileMiddleware;
diff --git a/mailing-list-api/src/routers/allListRoute.js b/mailing-list-api/src/routers/allListRoute.js
new file mode 100644
index 0000000..13b69e6
--- /dev/null
+++ b/mailing-list-api/src/routers/allListRoute.js
@@ -0,0 +1,62 @@
+import { Router } from "express";
+import { resolveFilePath } from "../utils/resolveFilePath.js";
+import writeFile from "../utils/writeFile.js";
+
+const router = Router();
+
+router.get("/", (req, res) => {
+  const lists = req.fileContent;
+  const keys = Array.from(lists.keys());
+
+  if (lists.size === 0) {
+    res.status(200).json([]);
+  }
+
+  res.status(200).json(keys);
+});
+
+router.get("/:name", (req, res) => {
+  const lists = req.fileContent;
+  const requestedName = req.params.name;
+  const requestedValue = lists.get(requestedName);
+
+  if (!requestedValue) {
+    res.status(404).send("no such member");
+  }
+
+  res.status(200).json({ [requestedName]: requestedValue });
+});
+
+router.delete("/:name", (req, res) => {
+  const lists = req.fileContent;
+  const deletingName = req.params.name;
+  const isDeleted = lists.delete(deletingName);
+
+  if (!isDeleted) {
+    res.status(404).send("no such member");
+  }
+
+  const newObjectForWriting = Object.fromEntries(lists);
+  writeFile(newObjectForWriting, resolveFilePath());
+
+  res.status(200).send("member deleted");
+});
+
+router.put("/:name", (req, res) => {
+  const lists = req.fileContent;
+  const newName = req.body.name;
+  const newMembers = req.body.members;
+  lists.set(newName, newMembers);
+
+  if (!newName.trim() || !newMembers || !Array.isArray(newMembers) || !(newMembers.length > 0)) {
+    res.status(404).send("can not add member");
+  }
+
+  const newObjectForWriting = Object.fromEntries(lists);
+
+  writeFile(newObjectForWriting, resolveFilePath());
+
+  res.status(200).send("new member added");
+});
+
+export default router;
diff --git a/mailing-list-api/src/server.js b/mailing-list-api/src/server.js
new file mode 100644
index 0000000..370f4dd
--- /dev/null
+++ b/mailing-list-api/src/server.js
@@ -0,0 +1,9 @@
+import { app } from "./app.js";
+import dotenv from "dotenv";
+
+dotenv.config();
+const PORT = parseInt(process.env.PORT || "3000");
+
+app.listen(PORT, () => {
+  console.log(`app is listening on port ${PORT}`);
+});
diff --git a/mailing-list-api/src/utils/resolveFilePath.js b/mailing-list-api/src/utils/resolveFilePath.js
new file mode 100644
index 0000000..68d99ef
--- /dev/null
+++ b/mailing-list-api/src/utils/resolveFilePath.js
@@ -0,0 +1,8 @@
+import path from "path";
+import { fileURLToPath } from "url";
+
+export const resolveFilePath = () => {
+  const relativeFilePath = "./data/mailing-lists.json";
+  const __dirname = path.dirname(fileURLToPath(import.meta.url));
+  return path.resolve(__dirname, "..", relativeFilePath);
+};
diff --git a/mailing-list-api/src/utils/writeFile.js b/mailing-list-api/src/utils/writeFile.js
new file mode 100644
index 0000000..f0c1f9f
--- /dev/null
+++ b/mailing-list-api/src/utils/writeFile.js
@@ -0,0 +1,8 @@
+import fs from "fs";
+
+const writeFile = (data, path) => {
+  const jsonData = JSON.stringify(data, null, 2);
+  fs.writeFileSync(path, jsonData);
+};
+
+export default writeFile;
diff --git a/package-lock.json b/package-lock.json
index a600e80..79a52bc 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -42,8 +42,13 @@
       "name": "@module-node/mailing-list-api",
       "version": "1.0.0",
       "license": "CC-BY-SA-4.0",
+      "dependencies": {
+        "dotenv": "^16.4.5",
+        "express": "^4.19.2"
+      },
       "devDependencies": {
-        "jest": "^26.6.3"
+        "jest": "^26.6.3",
+        "nodemon": "^3.1.0"
       }
     },
     "node_modules/@ampproject/remapping": {
@@ -1567,12 +1572,12 @@
       }
     },
     "node_modules/body-parser": {
-      "version": "1.20.1",
-      "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.20.1.tgz",
-      "integrity": "sha512-jWi7abTbYwajOytWCQc37VulmWiRae5RyTpaCyDcS5/lMdtwSz5lOpDE67srw/HYe35f1z3fDQw+3txg7gNtWw==",
+      "version": "1.20.2",
+      "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.20.2.tgz",
+      "integrity": "sha512-ml9pReCu3M61kGlqoTm2umSXTlRTuGTx0bfYj+uIUKKYycG5NtSbeetV3faSU6R7ajOPw0g/J1PvK4qNy7s5bA==",
       "dependencies": {
         "bytes": "3.1.2",
-        "content-type": "~1.0.4",
+        "content-type": "~1.0.5",
         "debug": "2.6.9",
         "depd": "2.0.0",
         "destroy": "1.2.0",
@@ -1580,7 +1585,7 @@
         "iconv-lite": "0.4.24",
         "on-finished": "2.4.1",
         "qs": "6.11.0",
-        "raw-body": "2.5.1",
+        "raw-body": "2.5.2",
         "type-is": "~1.6.18",
         "unpipe": "1.0.0"
       },
@@ -1692,13 +1697,18 @@
       }
     },
     "node_modules/call-bind": {
-      "version": "1.0.5",
-      "resolved": "https://registry.npmjs.org/call-bind/-/call-bind-1.0.5.tgz",
-      "integrity": "sha512-C3nQxfFZxFRVoJoGKKI8y3MOEo129NQ+FgQ08iye+Mk4zNZZGdjfs06bVTr+DBSlA66Q2VEcMki/cUCP4SercQ==",
+      "version": "1.0.7",
+      "resolved": "https://registry.npmjs.org/call-bind/-/call-bind-1.0.7.tgz",
+      "integrity": "sha512-GHTSNSYICQ7scH7sZ+M2rFopRoLh8t2bLSW6BbgrtLsahOIB5iyAVJf9GjWK3cYTDaMj4XdBpM1cA6pIS0Kv2w==",
       "dependencies": {
+        "es-define-property": "^1.0.0",
+        "es-errors": "^1.3.0",
         "function-bind": "^1.1.2",
-        "get-intrinsic": "^1.2.1",
-        "set-function-length": "^1.1.1"
+        "get-intrinsic": "^1.2.4",
+        "set-function-length": "^1.2.1"
+      },
+      "engines": {
+        "node": ">= 0.4"
       },
       "funding": {
         "url": "https://github.com/sponsors/ljharb"
@@ -1965,9 +1975,9 @@
       "dev": true
     },
     "node_modules/cookie": {
-      "version": "0.5.0",
-      "resolved": "https://registry.npmjs.org/cookie/-/cookie-0.5.0.tgz",
-      "integrity": "sha512-YZ3GUyn/o8gfKJlnlX7g7xq4gyO6OSuhGPKaaGssGB2qgDUS0gPgtTvoyZLTt9Ab6dC4hfc9dV5arkvc/OCmrw==",
+      "version": "0.6.0",
+      "resolved": "https://registry.npmjs.org/cookie/-/cookie-0.6.0.tgz",
+      "integrity": "sha512-U71cyTamuh1CRNCfpGY6to28lxvNwPG4Guz/EVjgf3Jmzv0vlDp1atT9eS5dDjMYHucpHbWns6Lwf3BKz6svdw==",
       "engines": {
         "node": ">= 0.6"
       }
@@ -2092,16 +2102,19 @@
       }
     },
     "node_modules/define-data-property": {
-      "version": "1.1.1",
-      "resolved": "https://registry.npmjs.org/define-data-property/-/define-data-property-1.1.1.tgz",
-      "integrity": "sha512-E7uGkTzkk1d0ByLeSc6ZsFS79Axg+m1P/VsgYsxHgiuc3tFSj+MjMIwe90FC4lOAZzNBdY7kkO2P2wKdsQ1vgQ==",
+      "version": "1.1.4",
+      "resolved": "https://registry.npmjs.org/define-data-property/-/define-data-property-1.1.4.tgz",
+      "integrity": "sha512-rBMvIzlpA8v6E+SJZoo++HAYqsLrkg7MSfIinMPFhmkorw7X+dOXVJQs+QT69zGkzMyfDnIMN2Wid1+NbL3T+A==",
       "dependencies": {
-        "get-intrinsic": "^1.2.1",
-        "gopd": "^1.0.1",
-        "has-property-descriptors": "^1.0.0"
+        "es-define-property": "^1.0.0",
+        "es-errors": "^1.3.0",
+        "gopd": "^1.0.1"
       },
       "engines": {
         "node": ">= 0.4"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/ljharb"
       }
     },
     "node_modules/define-property": {
@@ -2183,6 +2196,17 @@
         "node": ">=8"
       }
     },
+    "node_modules/dotenv": {
+      "version": "16.4.5",
+      "resolved": "https://registry.npmjs.org/dotenv/-/dotenv-16.4.5.tgz",
+      "integrity": "sha512-ZmdL2rui+eB2YwhsWzjInR8LldtZHGDoQ1ugH85ppHKwpUHL7j7rN0Ti9NCnGiQbhaZ11FpR+7ao1dNsmduNUg==",
+      "engines": {
+        "node": ">=12"
+      },
+      "funding": {
+        "url": "https://dotenvx.com"
+      }
+    },
     "node_modules/ee-first": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/ee-first/-/ee-first-1.1.1.tgz",
@@ -2252,6 +2276,25 @@
         "is-arrayish": "^0.2.1"
       }
     },
+    "node_modules/es-define-property": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/es-define-property/-/es-define-property-1.0.0.tgz",
+      "integrity": "sha512-jxayLKShrEqqzJ0eumQbVhTYQM27CfT1T35+gCgDFoL82JLsXqTJ76zv6A0YLOgEnLUMvLzsDsGIrl8NFpT2gQ==",
+      "dependencies": {
+        "get-intrinsic": "^1.2.4"
+      },
+      "engines": {
+        "node": ">= 0.4"
+      }
+    },
+    "node_modules/es-errors": {
+      "version": "1.3.0",
+      "resolved": "https://registry.npmjs.org/es-errors/-/es-errors-1.3.0.tgz",
+      "integrity": "sha512-Zf5H2Kxt2xjTvbJvP2ZWLEICxA6j+hAmMzIlypy4xcBg1vKVnx89Wy0GbS+kf5cwCVFFzdCFh2XSCFNULS6csw==",
+      "engines": {
+        "node": ">= 0.4"
+      }
+    },
     "node_modules/escalade": {
       "version": "3.1.1",
       "resolved": "https://registry.npmjs.org/escalade/-/escalade-3.1.1.tgz",
@@ -2455,16 +2498,16 @@
       }
     },
     "node_modules/express": {
-      "version": "4.18.2",
-      "resolved": "https://registry.npmjs.org/express/-/express-4.18.2.tgz",
-      "integrity": "sha512-5/PsL6iGPdfQ/lKM1UuielYgv3BUoJfz1aUwU9vHZ+J7gyvwdQXFEBIEIaxeGf0GIcreATNyBExtalisDbuMqQ==",
+      "version": "4.19.2",
+      "resolved": "https://registry.npmjs.org/express/-/express-4.19.2.tgz",
+      "integrity": "sha512-5T6nhjsT+EOMzuck8JjBHARTHfMht0POzlA60WV2pMD3gyXw2LZnZ+ueGdNxG+0calOJcWKbpFcuzLZ91YWq9Q==",
       "dependencies": {
         "accepts": "~1.3.8",
         "array-flatten": "1.1.1",
-        "body-parser": "1.20.1",
+        "body-parser": "1.20.2",
         "content-disposition": "0.5.4",
         "content-type": "~1.0.4",
-        "cookie": "0.5.0",
+        "cookie": "0.6.0",
         "cookie-signature": "1.0.6",
         "debug": "2.6.9",
         "depd": "2.0.0",
@@ -2742,15 +2785,19 @@
       }
     },
     "node_modules/get-intrinsic": {
-      "version": "1.2.2",
-      "resolved": "https://registry.npmjs.org/get-intrinsic/-/get-intrinsic-1.2.2.tgz",
-      "integrity": "sha512-0gSo4ml/0j98Y3lngkFEot/zhiCeWsbYIlZ+uZOVgzLyLaUw7wxUL+nCTP0XJvJg1AXulJRI3UJi8GsbDuxdGA==",
+      "version": "1.2.4",
+      "resolved": "https://registry.npmjs.org/get-intrinsic/-/get-intrinsic-1.2.4.tgz",
+      "integrity": "sha512-5uYhsJH8VJBTv7oslg4BznJYhDoRI6waYCxMmCdnTrcCrHA/fCFKoTFz2JKKE0HdDFUF7/oQuhzumXJK7paBRQ==",
       "dependencies": {
+        "es-errors": "^1.3.0",
         "function-bind": "^1.1.2",
         "has-proto": "^1.0.1",
         "has-symbols": "^1.0.3",
         "hasown": "^2.0.0"
       },
+      "engines": {
+        "node": ">= 0.4"
+      },
       "funding": {
         "url": "https://github.com/sponsors/ljharb"
       }
@@ -2862,20 +2909,20 @@
       }
     },
     "node_modules/has-property-descriptors": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/has-property-descriptors/-/has-property-descriptors-1.0.1.tgz",
-      "integrity": "sha512-VsX8eaIewvas0xnvinAe9bw4WfIeODpGYikiWYLH+dma0Jw6KHYqWiWfhQlgOVK8D6PvjubK5Uc4P0iIhIcNVg==",
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/has-property-descriptors/-/has-property-descriptors-1.0.2.tgz",
+      "integrity": "sha512-55JNKuIW+vq4Ke1BjOTjM2YctQIvCT7GFzHwmfZPGo5wnrgkid0YQtnAleFSqumZm4az3n2BS+erby5ipJdgrg==",
       "dependencies": {
-        "get-intrinsic": "^1.2.2"
+        "es-define-property": "^1.0.0"
       },
       "funding": {
         "url": "https://github.com/sponsors/ljharb"
       }
     },
     "node_modules/has-proto": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/has-proto/-/has-proto-1.0.1.tgz",
-      "integrity": "sha512-7qE+iP+O+bgF9clE5+UoBFzE65mlBiVj3tKCrlNQ0Ogwm0BjpT/gK4SlLYDMybDh5I3TCTKnPPa0oMG7JDYrhg==",
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/has-proto/-/has-proto-1.0.3.tgz",
+      "integrity": "sha512-SJ1amZAJUiZS+PhsVLf5tGydlaVB8EdFpaSO4gmiUKUOxk8qzn5AIy4ZeJUmh22znIdk/uMAUT2pl3FxzVUH+Q==",
       "engines": {
         "node": ">= 0.4"
       },
@@ -4539,9 +4586,9 @@
       "dev": true
     },
     "node_modules/nodemon": {
-      "version": "3.0.2",
-      "resolved": "https://registry.npmjs.org/nodemon/-/nodemon-3.0.2.tgz",
-      "integrity": "sha512-9qIN2LNTrEzpOPBaWHTm4Asy1LxXLSickZStAQ4IZe7zsoIpD/A7LWxhZV3t4Zu352uBcqVnRsDXSMR2Sc3lTA==",
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/nodemon/-/nodemon-3.1.0.tgz",
+      "integrity": "sha512-xqlktYlDMCepBJd43ZQhjWwMw2obW/JRvkrLxq5RCNcuDDX1DbcPT+qT1IlIIdf+DhnWs90JpTMe+Y5KxOchvA==",
       "dev": true,
       "dependencies": {
         "chokidar": "^3.5.2",
@@ -5116,9 +5163,9 @@
       }
     },
     "node_modules/raw-body": {
-      "version": "2.5.1",
-      "resolved": "https://registry.npmjs.org/raw-body/-/raw-body-2.5.1.tgz",
-      "integrity": "sha512-qqJBtEyVgS0ZmPGdCFPWJ3FreoqvG4MVQln/kCgF7Olq95IbOp0/BWyMwbdtn4VTvkM8Y7khCQ2Xgk/tcrCXig==",
+      "version": "2.5.2",
+      "resolved": "https://registry.npmjs.org/raw-body/-/raw-body-2.5.2.tgz",
+      "integrity": "sha512-8zGqypfENjCIqGhgXToC8aB2r7YrBX+AQAfIPs/Mlk+BtPTztOvTS01NRW/3Eh60J+a48lt8qsCzirQ6loCVfA==",
       "dependencies": {
         "bytes": "3.1.2",
         "http-errors": "2.0.0",
@@ -5730,14 +5777,16 @@
       "dev": true
     },
     "node_modules/set-function-length": {
-      "version": "1.1.1",
-      "resolved": "https://registry.npmjs.org/set-function-length/-/set-function-length-1.1.1.tgz",
-      "integrity": "sha512-VoaqjbBJKiWtg4yRcKBQ7g7wnGnLV3M8oLvVWwOk2PdYY6PEFegR1vezXR0tw6fZGF9csVakIRjrJiy2veSBFQ==",
+      "version": "1.2.2",
+      "resolved": "https://registry.npmjs.org/set-function-length/-/set-function-length-1.2.2.tgz",
+      "integrity": "sha512-pgRc4hJ4/sNjWCSS9AmnS40x3bNMDTknHgL5UaMBTMyJnU90EgWh1Rz+MC9eFu4BuN/UwZjKQuY/1v3rM7HMfg==",
       "dependencies": {
-        "define-data-property": "^1.1.1",
-        "get-intrinsic": "^1.2.1",
+        "define-data-property": "^1.1.4",
+        "es-errors": "^1.3.0",
+        "function-bind": "^1.1.2",
+        "get-intrinsic": "^1.2.4",
         "gopd": "^1.0.1",
-        "has-property-descriptors": "^1.0.0"
+        "has-property-descriptors": "^1.0.2"
       },
       "engines": {
         "node": ">= 0.4"
@@ -5813,13 +5862,17 @@
       "optional": true
     },
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