diff --git a/.gitignore b/.gitignore
index 09777b5..acb77b8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,4 +4,5 @@ node_modules
 .vercel
 .idea
 
-.claude
\ No newline at end of file
+.claude
+.env*.local
diff --git a/scripts/github/__mock__/mockGithubApiResponse.ts b/scripts/github/__mock__/mockGithubApiResponse.ts
new file mode 100644
index 0000000..fb1bbb0
--- /dev/null
+++ b/scripts/github/__mock__/mockGithubApiResponse.ts
@@ -0,0 +1,51 @@
+import { GitHubApiResponse } from "../../../types";
+
+const MOCK_RESPONSE: GitHubApiResponse = {
+  data: {
+    user: {
+      followers: { totalCount: 42 },
+      repositories: {
+        edges: [
+          {
+            node: {
+              stargazerCount: 15,
+              forkCount: 3,
+              languages: {
+                edges: [
+                  { node: { name: "TypeScript", color: "#3178c6" } },
+                  { node: { name: "JavaScript", color: "#f1e05a" } },
+                ],
+              },
+            },
+          },
+          {
+            node: {
+              stargazerCount: 8,
+              forkCount: 1,
+              languages: {
+                edges: [
+                  { node: { name: "TypeScript", color: "#3178c6" } },
+                  { node: { name: "CSS", color: "#563d7c" } },
+                ],
+              },
+            },
+          },
+          {
+            node: {
+              stargazerCount: 5,
+              forkCount: 0,
+              languages: {
+                edges: [{ node: { name: "Python", color: "#3572A5" } }],
+              },
+            },
+          },
+        ],
+      },
+      contributionsCollection: {
+        contributionCalendar: { totalContributions: 847 },
+      },
+    },
+  },
+};
+
+export { MOCK_RESPONSE };
diff --git a/scripts/github/githubApiClient.ts b/scripts/github/githubApiClient.ts
index f4921a3..0fe15a1 100644
--- a/scripts/github/githubApiClient.ts
+++ b/scripts/github/githubApiClient.ts
@@ -1,62 +1,59 @@
 import https from "https";
 import dotenv from "dotenv";
 import { GitHubApiResponse } from "../../types";
+import { MOCK_RESPONSE } from "./__mock__/mockGithubApiResponse";
 
 dotenv.config();
 
 const createHeaders = (): Record<string, string> => ({
-	"user-agent": "Github-Stats",
-	Authorization: `Bearer ${process.env.GITHUB_TOKEN}`,
-	"Content-Type": "application/json",
-	Accept: "application/json",
+  "user-agent": "Github-Stats",
+  Authorization: `Bearer ${process.env.GITHUB_TOKEN}`,
+  "Content-Type": "application/json",
+  Accept: "application/json",
 });
 
 const makeGraphQLRequest = (query: string): Promise<GitHubApiResponse> => {
-	const options: https.RequestOptions = {
-		hostname: "api.github.com",
-		path: "/graphql",
-		method: "POST",
-		headers: createHeaders(),
-	};
-
-	return new Promise<GitHubApiResponse>((resolve, reject) => {
-		const req = https.request(options, (res) => {
-			const buffers: Buffer[] = [];
-
-			res.on("data", (d: Buffer) => {
-				buffers.push(d);
-			});
-
-			res.on("end", () => {
-				try {
-					resolve(
-						JSON.parse(
-							Buffer.concat(buffers).toString()
-						) as GitHubApiResponse
-					);
-				} catch (e) {
-					reject(
-						new Error(
-							`Failed to parse GitHub API response: ${(e as Error).message}`
-						)
-					);
-				}
-			});
-		});
-
-		req.on("error", (error: Error) => {
-			console.log(error);
-			reject(error);
-		});
-
-		req.setTimeout(30000, () => {
-			req.destroy();
-			reject(new Error("GitHub API request timed out"));
-		});
-
-		req.write(JSON.stringify({ query }));
-		req.end();
-	});
+  if (process.env.MOCK_GITHUB === "true") {
+    return Promise.resolve(MOCK_RESPONSE);
+  }
+
+  const options: https.RequestOptions = {
+    hostname: "api.github.com",
+    path: "/graphql",
+    method: "POST",
+    headers: createHeaders(),
+  };
+
+  return new Promise<GitHubApiResponse>((resolve, reject) => {
+    const req = https.request(options, (res) => {
+      const buffers: Buffer[] = [];
+
+      res.on("data", (d: Buffer) => {
+        buffers.push(d);
+      });
+
+      res.on("end", () => {
+        try {
+          resolve(JSON.parse(Buffer.concat(buffers).toString()) as GitHubApiResponse);
+        } catch (e) {
+          reject(new Error(`Failed to parse GitHub API response: ${(e as Error).message}`));
+        }
+      });
+    });
+
+    req.on("error", (error: Error) => {
+      console.log(error);
+      reject(error);
+    });
+
+    req.setTimeout(30000, () => {
+      req.destroy();
+      reject(new Error("GitHub API request timed out"));
+    });
+
+    req.write(JSON.stringify({ query }));
+    req.end();
+  });
 };
 
 export { makeGraphQLRequest };