diff --git a/src/createServer.js b/src/createServer.js
index 89724c920..456df195d 100644
--- a/src/createServer.js
+++ b/src/createServer.js
@@ -1,3 +1,72 @@
-// Write code here
-// Also, you can create additional files in the src folder
-// and import (require) them here
+/* eslint-disable max-len */
+const http = require('http');
+const { convertToCase } = require('./convertToCase');
+
+const AVAILABLE_CASES = ['SNAKE', 'KEBAB', 'CAMEL', 'PASCAL', 'UPPER'];
+
+function createServer() {
+  const server = http.createServer((req, res) => {
+    res.setHeader('Content-Type', 'application/json');
+
+    const url = new URL(req.url, 'http://localhost');
+
+    const textToConvert = decodeURIComponent(url.pathname.slice(1));
+    const toCase = url.searchParams.get('toCase');
+
+    const errors = [];
+
+    if (!textToConvert) {
+      errors.push({
+        message:
+          'Text to convert is required. Correct request is: "/<TEXT_TO_CONVERT>?toCase=<CASE_NAME>".',
+      });
+    }
+
+    if (!toCase) {
+      errors.push({
+        message:
+          '"toCase" query param is required. Correct request is: "/<TEXT_TO_CONVERT>?toCase=<CASE_NAME>".',
+      });
+    }
+
+    if (toCase && !AVAILABLE_CASES.includes(toCase)) {
+      errors.push({
+        message:
+          'This case is not supported. Available cases: SNAKE, KEBAB, CAMEL, PASCAL, UPPER.',
+      });
+    }
+
+    if (errors.length > 0) {
+      res.statusCode = 400;
+      res.statusMessage = 'Bad request';
+
+      res.end(
+        JSON.stringify({
+          errors,
+        }),
+      );
+
+      return;
+    }
+
+    const result = convertToCase(textToConvert, toCase);
+
+    res.statusCode = 200;
+    res.statusMessage = 'OK';
+
+    res.end(
+      JSON.stringify({
+        originalCase: result.originalCase,
+        targetCase: toCase,
+        originalText: textToConvert,
+        convertedText: result.convertedText,
+      }),
+    );
+  });
+
+  return server;
+}
+
+module.exports = {
+  createServer,
+};