diff --git a/src/api.test.ts b/src/api.test.ts
index 0e718ef..e9abbae 100644
--- a/src/api.test.ts
+++ b/src/api.test.ts
@@ -1,4 +1,8 @@
-import Forgejo from "./api";
+// SPDX-FileCopyrightText: 2023 Aravinth Manivannan <realaravinth@batsense.net>
+//
+// SPDX-License-Identifier: AGPL-3.0-or-later
+
+import Forgejo from "./index";
 import authtoken from "../secrets/user1-accesstoken.json";
 
 const token = authtoken["sha1"];
diff --git a/src/index.ts b/src/index.ts
new file mode 100644
index 0000000..4bdbcac
--- /dev/null
+++ b/src/index.ts
@@ -0,0 +1,235 @@
+// SPDX-FileCopyrightText: 2023 Aravinth Manivannan <realaravinth@batsense.net>
+//
+// SPDX-License-Identifier: AGPL-3.0-or-later
+
+import Auth from "./auth";
+import User from "./spec/user";
+import Notification from "./spec/notification";
+import Issue from "./spec/issue";
+import Repository from "./spec/repository";
+import Comment from "./spec/comments";
+
+class Forgejo {
+  url: URL;
+  username: string;
+  token?: Auth;
+  /**
+   * Represents a Forgejo instance.
+   * @constructor
+   * @param {string} url - The URL of the Forgejo instance
+   * @param {string} username - username of the logged in user
+   */
+  constructor(url: string, username: string) {
+    this.url = new URL(url);
+    this.username = username;
+  }
+
+  /**
+   * Authenticate with token
+   * @param {Auth} token - access token
+   */
+  setTokenAuth(token: string) {
+    this.token = new Auth(token);
+  }
+
+  getTokenAuth(): Auth {
+    if (this.token) {
+      return this.token;
+    } else {
+      throw new Error("set authentication token before use");
+    }
+  }
+
+  getTokenAuthHeader() {
+    return { Authorization: `token ${this.getTokenAuth().getToken()}` };
+  }
+
+  /**
+   * Get logged in user
+   */
+  async getUser(): Promise<User> {
+    this.url.pathname = "/api/v1/user";
+    let res = await fetch(this.url, {
+      method: "GET",
+      credentials: "include",
+      headers: this.getTokenAuthHeader(),
+    });
+    return await res.json();
+  }
+
+  /**
+   * Get all notifications
+   */
+  async getNotifications(): Promise<Array<Notification>> {
+    this.url.pathname = "/api/v1/notifications";
+    let res = await fetch(this.url, {
+      method: "GET",
+      credentials: "include",
+      headers: this.getTokenAuthHeader(),
+    });
+
+    return await res.json();
+  }
+  /**
+   * Get number of unread notifications
+   */
+  async getNumUnreadNotifications(): Promise<number> {
+    this.url.pathname = "/api/v1/notifications/new";
+    let res = await fetch(this.url, {
+      method: "GET",
+      credentials: "include",
+      headers: this.getTokenAuthHeader(),
+    });
+
+    let data = await res.json();
+    return data["new"];
+  }
+
+  /**
+   * Get Notification Thread
+   * @param {number} id - The ID of a notification thread
+   */
+  async getNotificationThread(id: number): Promise<Notification> {
+    this.url.pathname = `/api/v1/notifications/threads/${id}`;
+    let res = await fetch(this.url, {
+      method: "GET",
+      credentials: "include",
+      headers: this.getTokenAuthHeader(),
+    });
+    return await res.json();
+  }
+
+  /**
+   * Get the time at which the issue was last read
+   */
+  lastReadTime(issue: Issue): Date {
+    return new Date("01/01/01"); // TODO: return last read time from storage. If unread, return 0
+  }
+
+  /**
+   * Check if logged in user is mentioned in the issue
+   */
+  async findMentionsInIssue(owner: string, repo: string, id: number) {
+    let issue = await this.getIssue(owner, repo, id);
+    issue = await this.getCommentsForIssue(issue);
+    let unreadTime = this.lastReadTime(issue);
+
+    const mentionUtil = (str: string): boolean => {
+      return str.includes(this.username);
+    };
+
+    const items = [];
+
+    if (new Date(issue.created_at) > unreadTime) {
+      items.push(issue.title);
+      items.push(issue.body);
+    }
+
+    issue.lazy_comments_data.forEach((comment) => {
+      if (comment.created_at > unreadTime) {
+        items.push(comment.body);
+        return;
+      }
+      if (comment.updated_at) {
+        if (comment.updated_at > unreadTime) {
+          items.push(comment.body);
+          return;
+        }
+      }
+    });
+
+    let mention = false;
+    items.forEach((item) => {
+      if (mentionUtil(item)) {
+        mention = true;
+        return;
+      }
+    });
+    return mention;
+  }
+
+  /**
+   * Mark Notification Read
+   * @param {number} id - The ID of a notification thread
+   */
+  async markNotificationRead(id: number) {
+    this.url.pathname = `/api/v1/notifications/threads/${id}`;
+    await fetch(this.url, { method: "PATCH" });
+  }
+
+  /**
+   * Mark Notification Read for a specific repository
+   * @param {string} owner - Name of the owner of the repository
+   * @param {string} repo - Name of the repository
+   */
+  async markNotificationReadForRepo(owner: string, repo: string) {
+    this.url.pathname = `/api/v1/repos/${owner}/${repo}/notifications`;
+    await fetch(this.url, { method: "PUT" });
+  }
+
+  /**
+   * Get Issue and its comments
+   * @param {str} owner - The owner of the repository
+   * @param {str} repo - The name of the repository
+   * @param {number} id - The ID of an issue
+   */
+  async getIssue(owner: string, repo: string, id: number): Promise<Issue> {
+    this.url.pathname = `/api/v1/repos/${owner}/${repo}/issues/${id}`;
+    let res = await fetch(this.url, {
+      method: "GET",
+      credentials: "include",
+      headers: this.getTokenAuthHeader(),
+    });
+    let issue = await res.json();
+
+    if (typeof issue.created_at === "string") {
+      issue.created_at = new Date(issue.created_at);
+    }
+
+    if (issue.updated_at) {
+      if (typeof issue.updated_at === "string") {
+        issue.updated_at = new Date(issue.updated_at);
+      }
+    }
+
+    if (issue.closed_at) {
+      if (typeof issue.closed_at === "string") {
+        issue.closed_at = new Date(issue.closed_at);
+      }
+    }
+
+    return issue;
+  }
+
+  async getCommentsForIssue(issue: Issue): Promise<Issue> {
+    // TODO: check if issue.number != issue.id causes problems. I'm assuming
+    // Issue.number is the local repository issue ID and issue.id is DB ID
+    this.url.pathname = `/api/v1/repos/${issue.repository.owner}/${issue.repository.name}/issues/${issue.number}/comments`;
+    let res = await fetch(this.url, {
+      method: "GET",
+      credentials: "include",
+      headers: this.getTokenAuthHeader(),
+    });
+    let c: Array<Comment> = await res.json();
+
+    c = c.map((comment) => {
+      if (typeof comment.created_at === "string") {
+        comment.created_at = new Date(comment.created_at);
+      }
+
+      if (comment.updated_at) {
+        if (typeof comment.updated_at === "string") {
+          comment.updated_at = new Date(comment.updated_at);
+        }
+      }
+      return comment;
+    });
+
+    issue.lazy_comments_data = c;
+
+    return issue;
+  }
+}
+
+export default Forgejo;
+export { Repository, Notification, User, Comment, Issue, Auth };