diff --git a/tests/api.test.js b/tests/api.test.js
new file mode 100644
index 0000000..749bc7b
--- /dev/null
+++ b/tests/api.test.js
@@ -0,0 +1,122 @@
+require("@testing-library/jest-dom");
+const axios = require("axios");
+const MockAdapter = require("axios-mock-adapter");
+const api = require("../api/index");
+const renderStatsCard = require("../src/renderStatsCard");
+const { renderError } = require("../src/utils");
+
+const stats = {
+  name: "Anurag Hazra",
+  totalStars: 100,
+  totalCommits: 200,
+  totalIssues: 300,
+  totalPRs: 400,
+  contributedTo: 500,
+};
+
+const data = {
+  data: {
+    user: {
+      name: stats.name,
+      repositoriesContributedTo: { totalCount: stats.contributedTo },
+      contributionsCollection: { totalCommitContributions: stats.totalCommits },
+      pullRequests: { totalCount: stats.totalPRs },
+      issues: { totalCount: stats.totalIssues },
+      repositories: {
+        nodes: [{ stargazers: { totalCount: 100 } }],
+      },
+    },
+  },
+};
+
+const error = {
+  errors: [
+    {
+      type: "NOT_FOUND",
+      path: ["user"],
+      locations: [],
+      message: "Could not fetch user",
+    },
+  ],
+};
+
+const mock = new MockAdapter(axios);
+
+afterEach(() => {
+  mock.reset();
+});
+
+describe("Test /api/", () => {
+  it("should test the request", async () => {
+    const req = {
+      query: {
+        username: "anuraghazra",
+      },
+    };
+    const res = {
+      setHeader: jest.fn(),
+      send: jest.fn(),
+    };
+    mock.onPost("https://api.github.com/graphql").reply(200, data);
+
+    await api(req, res);
+
+    expect(res.setHeader).toBeCalledWith("Content-Type", "image/svg+xml");
+    expect(res.send).toBeCalledWith(renderStatsCard(stats, { ...req.query }));
+  });
+
+  it("should render error card on error", async () => {
+    const req = {
+      query: {
+        username: "anuraghazra",
+      },
+    };
+    const res = {
+      setHeader: jest.fn(),
+      send: jest.fn(),
+    };
+    mock.onPost("https://api.github.com/graphql").reply(200, error);
+
+    await api(req, res);
+
+    expect(res.setHeader).toBeCalledWith("Content-Type", "image/svg+xml");
+    expect(res.send).toBeCalledWith(renderError(error.errors[0].message));
+  });
+
+  it("should get the query options", async () => {
+    const req = {
+      query: {
+        username: "anuraghazra",
+        hide: `["issues","prs","contribs"]`,
+        show_icons: true,
+        hide_border: true,
+        line_height: 100,
+        title_color: "fff",
+        icon_color: "fff",
+        text_color: "fff",
+        bg_color: "fff",
+      },
+    };
+    const res = {
+      setHeader: jest.fn(),
+      send: jest.fn(),
+    };
+    mock.onPost("https://api.github.com/graphql").reply(200, data);
+
+    await api(req, res);
+
+    expect(res.setHeader).toBeCalledWith("Content-Type", "image/svg+xml");
+    expect(res.send).toBeCalledWith(
+      renderStatsCard(stats, {
+        hide: ["issues", "prs", "contribs"],
+        show_icons: true,
+        hide_border: true,
+        line_height: 100,
+        title_color: "fff",
+        icon_color: "fff",
+        text_color: "fff",
+        bg_color: "fff",
+      })
+    );
+  });
+});
diff --git a/tests/fetchStats.test.js b/tests/fetchStats.test.js
index ee8de75..8b8c0c0 100644
--- a/tests/fetchStats.test.js
+++ b/tests/fetchStats.test.js
@@ -63,4 +63,4 @@ describe("Test fetchStats", () => {
       "Could not fetch user"
     );
   });
-});
+});
\ No newline at end of file
diff --git a/tests/pin.test.js b/tests/pin.test.js
new file mode 100644
index 0000000..924cc27
--- /dev/null
+++ b/tests/pin.test.js
@@ -0,0 +1,123 @@
+require("@testing-library/jest-dom");
+const axios = require("axios");
+const MockAdapter = require("axios-mock-adapter");
+const pin = require("../api/pin");
+const renderRepoCard = require("../src/renderRepoCard");
+const { renderError } = require("../src/utils");
+
+const data_repo = {
+  repository: {
+    name: "convoychat",
+    stargazers: { totalCount: 38000 },
+    description: "Help us take over the world! React + TS + GraphQL Chat App",
+    primaryLanguage: {
+      color: "#2b7489",
+      id: "MDg6TGFuZ3VhZ2UyODc=",
+      name: "TypeScript",
+    },
+    forkCount: 100,
+  },
+};
+
+const data_user = {
+  data: {
+    user: { repository: data_repo.repository },
+    organization: null,
+  },
+};
+
+const mock = new MockAdapter(axios);
+
+afterEach(() => {
+  mock.reset();
+});
+
+describe("Test /api/pin", () => {
+  it("should test the request", async () => {
+    const req = {
+      query: {
+        username: "anuraghazra",
+        repo: "convoychat",
+      },
+    };
+    const res = {
+      setHeader: jest.fn(),
+      send: jest.fn(),
+    };
+    mock.onPost("https://api.github.com/graphql").reply(200, data_user);
+
+    await pin(req, res);
+
+    expect(res.setHeader).toBeCalledWith("Content-Type", "image/svg+xml");
+    expect(res.send).toBeCalledWith(renderRepoCard(data_repo.repository));
+  });
+
+  it("should get the query options", async () => {
+    const req = {
+      query: {
+        username: "anuraghazra",
+        repo: "convoychat",
+        title_color: "fff",
+        icon_color: "fff",
+        text_color: "fff",
+        bg_color: "fff",
+      },
+    };
+    const res = {
+      setHeader: jest.fn(),
+      send: jest.fn(),
+    };
+    mock.onPost("https://api.github.com/graphql").reply(200, data_user);
+
+    await pin(req, res);
+
+    expect(res.setHeader).toBeCalledWith("Content-Type", "image/svg+xml");
+    expect(res.send).toBeCalledWith(
+      renderRepoCard(data_repo.repository, { ...req.query })
+    );
+  });
+
+  it("should render error card if user repo not found", async () => {
+    const req = {
+      query: {
+        username: "anuraghazra",
+        repo: "convoychat",
+      },
+    };
+    const res = {
+      setHeader: jest.fn(),
+      send: jest.fn(),
+    };
+    mock
+      .onPost("https://api.github.com/graphql")
+      .reply(200, { data: { user: { repository: null }, organization: null } });
+
+    await pin(req, res);
+
+    expect(res.setHeader).toBeCalledWith("Content-Type", "image/svg+xml");
+    expect(res.send).toBeCalledWith(renderError("User Repository Not found"));
+  });
+
+  it("should render error card if org repo not found", async () => {
+    const req = {
+      query: {
+        username: "anuraghazra",
+        repo: "convoychat",
+      },
+    };
+    const res = {
+      setHeader: jest.fn(),
+      send: jest.fn(),
+    };
+    mock
+      .onPost("https://api.github.com/graphql")
+      .reply(200, { data: { user: null, organization: { repository: null } } });
+
+    await pin(req, res);
+
+    expect(res.setHeader).toBeCalledWith("Content-Type", "image/svg+xml");
+    expect(res.send).toBeCalledWith(
+      renderError("Organization Repository Not found")
+    );
+  });
+});