diff --git a/README.md b/README.md
index dbae484..134b429 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,27 @@
 # nodetifications
+
 Notifications made easy in NodeJS!
+
+## Features
+- Very (c)lean package! < 4kB zipped and < 8kB unzipped, and documented with JSDoc annotations.
+- Multiple providers and notification modes in 1 package.
+- Very lean dependency, which means less points of failure.
+- Highly flexible to your needs, change provider/creds anywhere in between.
+- Standardized response formats. All successful requests will return JSON responses.
+- Promise based for asynchronous support and no [callback hell](http://callbackhell.com/).
+
+## Installation
+
+```zsh
+npm install nodetifications
+```
+
+## Usage
+
+Complete usage docs with sample code - COMING SOON.
+
+## Contributing
+Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.
+
+## License
+[MIT](https://choosealicense.com/licenses/mit/)
\ No newline at end of file
diff --git a/index.js b/index.js
new file mode 100644
index 0000000..a5104f8
--- /dev/null
+++ b/index.js
@@ -0,0 +1,77 @@
+import fetch, { Headers } from 'node-fetch';
+
+import { GenericError } from './utils/errors.js';
+
+const errorCheck = (from, to, userId, password) => {
+  if (!userId || !password) {
+    throw new GenericError({
+      errType: 'INVALID_CREDENTIALS',
+      errMsg: 'Invalid userId and password provided, check the credentials again'
+    })
+  }
+  if (!from) throw new GenericError({
+    errType: 'INVALID_FROM',
+    errMsg: 'Invalid From Number'
+  })
+  if (!to) throw new GenericError({
+    errType: 'INVALID_TO',
+    errMsg: 'Invalid To Number'
+  })
+}
+
+const gupShupSMSBaseURL = 'https://enterprise.smsgupshup.com/GatewayAPI/rest';
+const twilioSMSBaseURL = (userId) => `https://api.twilio.com/2010-04-01/Accounts/${userId}/Messages.json`;
+
+export class SMS {
+  constructor({ userId, password, provider, from } = {}) {
+    this.userId = userId;
+    this.password = password;
+    this.provider = provider;
+    this.from = from;
+  }
+
+  sendSMS({
+    provider = this.provider,
+    from = this.from,
+    to,
+    message = [],
+    userId = this.userId,
+    password = this.password
+  } = {}) {
+    if (provider !== this.provider && (userId === this.userId || password === this.password)) {
+      throw new GenericError({
+        errType: 'INVALID_CREDENTIALS',
+        errMsg: 'Provider has changed but the credentials have not, if you\'re using the same creds in multiple places, please stop. Get some help.'
+      })
+    }
+    let encodedMessage;
+    errorCheck(from, to, userId, password);
+    if (typeof message !== 'string') {
+      if (message[0]) {
+        encodedMessage = message.reduce(
+          (interimMessage, line, index) => `${interimMessage}${encodeURIComponent(line)}${index === message.length - 1 ? '' : '%0A'}`
+          , '');
+      } else {
+        encodedMessage = ''
+      }
+    } else {
+      message = encodeURIComponent(message);
+    }
+    switch (provider) {
+      case 'gupshup': return fetch(`${gupShupSMSBaseURL}?method=SendMessage&send_to=${to}&msg=${encodedMessage}&msg_type=TEXT&userid=${userId}&auth_scheme=plain&password=${password}&v=1.1&format=json`).then(result => result.json());
+      case 'twilio': const headers = new Headers();
+        const auth = Buffer.from(`${userId}:${password}`);
+        headers.append('Authorization', 'Basic ' + auth.toString('base64'));
+        return fetch(twilioSMSBaseURL(userId), { method: 'POST', headers, body: { Body: encodedMessage, From: encodeURIComponent(from), To: encodeURIComponent(to) } }).then(response => response.json());
+      default: throw new GenericError({
+        errType: 'PROVIDER_ERR',
+        errMsg: 'Invalid provider',
+        additionalDetails: 'If you would like to see this provider integrated, please raise an issue on https://github.com/ParadoxInfinite/nodetifications/issues/.'
+      });
+    }
+  }
+}
+
+export default {
+  SMS
+};
\ No newline at end of file
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..de1de77
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,98 @@
+{
+  "name": "nodetifications",
+  "version": "0.0.1",
+  "lockfileVersion": 2,
+  "requires": true,
+  "packages": {
+    "": {
+      "name": "nodetifications",
+      "version": "0.0.1",
+      "license": "MIT",
+      "dependencies": {
+        "node-fetch": "^3.0.0"
+      }
+    },
+    "node_modules/data-uri-to-buffer": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/data-uri-to-buffer/-/data-uri-to-buffer-3.0.1.tgz",
+      "integrity": "sha512-WboRycPNsVw3B3TL559F7kuBUM4d8CgMEvk6xEJlOp7OBPjt6G7z8WMWlD2rOFZLk6OYfFIUGsCOWzcQH9K2og==",
+      "engines": {
+        "node": ">= 6"
+      }
+    },
+    "node_modules/fetch-blob": {
+      "version": "3.1.3",
+      "resolved": "https://registry.npmjs.org/fetch-blob/-/fetch-blob-3.1.3.tgz",
+      "integrity": "sha512-ax1Y5I9w+9+JiM+wdHkhBoxew+zG4AJ2SvAD1v1szpddUIiPERVGBxrMcB2ZqW0Y3PP8bOWYv2zqQq1Jp2kqUQ==",
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/jimmywarting"
+        },
+        {
+          "type": "paypal",
+          "url": "https://paypal.me/jimmywarting"
+        }
+      ],
+      "dependencies": {
+        "web-streams-polyfill": "^3.0.3"
+      },
+      "engines": {
+        "node": "^12.20 || >= 14.13"
+      }
+    },
+    "node_modules/node-fetch": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/node-fetch/-/node-fetch-3.0.0.tgz",
+      "integrity": "sha512-bKMI+C7/T/SPU1lKnbQbwxptpCrG9ashG+VkytmXCPZyuM9jB6VU+hY0oi4lC8LxTtAeWdckNCTa3nrGsAdA3Q==",
+      "dependencies": {
+        "data-uri-to-buffer": "^3.0.1",
+        "fetch-blob": "^3.1.2"
+      },
+      "engines": {
+        "node": "^12.20.0 || ^14.13.1 || >=16.0.0"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/node-fetch"
+      }
+    },
+    "node_modules/web-streams-polyfill": {
+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/web-streams-polyfill/-/web-streams-polyfill-3.1.1.tgz",
+      "integrity": "sha512-Czi3fG883e96T4DLEPRvufrF2ydhOOW1+1a6c3gNjH2aIh50DNFBdfwh2AKoOf1rXvpvavAoA11Qdq9+BKjE0Q==",
+      "engines": {
+        "node": ">= 8"
+      }
+    }
+  },
+  "dependencies": {
+    "data-uri-to-buffer": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/data-uri-to-buffer/-/data-uri-to-buffer-3.0.1.tgz",
+      "integrity": "sha512-WboRycPNsVw3B3TL559F7kuBUM4d8CgMEvk6xEJlOp7OBPjt6G7z8WMWlD2rOFZLk6OYfFIUGsCOWzcQH9K2og=="
+    },
+    "fetch-blob": {
+      "version": "3.1.3",
+      "resolved": "https://registry.npmjs.org/fetch-blob/-/fetch-blob-3.1.3.tgz",
+      "integrity": "sha512-ax1Y5I9w+9+JiM+wdHkhBoxew+zG4AJ2SvAD1v1szpddUIiPERVGBxrMcB2ZqW0Y3PP8bOWYv2zqQq1Jp2kqUQ==",
+      "requires": {
+        "web-streams-polyfill": "^3.0.3"
+      }
+    },
+    "node-fetch": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/node-fetch/-/node-fetch-3.0.0.tgz",
+      "integrity": "sha512-bKMI+C7/T/SPU1lKnbQbwxptpCrG9ashG+VkytmXCPZyuM9jB6VU+hY0oi4lC8LxTtAeWdckNCTa3nrGsAdA3Q==",
+      "requires": {
+        "data-uri-to-buffer": "^3.0.1",
+        "fetch-blob": "^3.1.2"
+      }
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+    "web-streams-polyfill": {
+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/web-streams-polyfill/-/web-streams-polyfill-3.1.1.tgz",
+      "integrity": "sha512-Czi3fG883e96T4DLEPRvufrF2ydhOOW1+1a6c3gNjH2aIh50DNFBdfwh2AKoOf1rXvpvavAoA11Qdq9+BKjE0Q=="
+    }
+  }
+}
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..837f01f
--- /dev/null
+++ b/package.json
@@ -0,0 +1,34 @@
+{
+  "name": "nodetifications",
+  "version": "0.0.1",
+  "description": "Notifications made easy in NodeJS",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "type": "module",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/ParadoxInfinite/nodetifications.git"
+  },
+  "keywords": [
+    "notifications",
+    "node",
+    "gupshup"
+  ],
+  "types": "./types/index.d.ts",
+  "files": [
+    "index.js",
+    "types/index.d.ts",
+    "utils/errors.js"
+  ],
+  "author": "Samarth Kulkarni",
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/ParadoxInfinite/nodetifications/issues"
+  },
+  "homepage": "https://github.com/ParadoxInfinite/nodetifications#readme",
+  "dependencies": {
+    "node-fetch": "^3.0.0"
+  }
+}
diff --git a/types/index.d.ts b/types/index.d.ts
new file mode 100644
index 0000000..0ccf8f5
--- /dev/null
+++ b/types/index.d.ts
@@ -0,0 +1,32 @@
+export class SMS {
+  /**
+   * @param {string} userId - User ID to authenticate with the provider
+   * @param {string} password - Password to authenticate with the provider
+   * @param {string} provider - Provider to send messages from. Currently valid providers: `twilio` and `gupshup`
+   * @param {string} from - Number from which to send the SMS, can be changed per request too, @see `SMS.sendSMS`
+   */
+  constructor({ userId, password, provider, from }: {
+    userId: string,
+    password: string,
+    provider: string,
+    from: string
+  })
+
+  /**
+   * @param {string} provider - Defaults to constructor value, but can give a different `provider` than before, however this makes `userId` and `password` mandatory.
+   * @param {string} from - Defaults to constructor value, but can be different than the `from` before.
+   * @param {string} to - Mandatory value, recipients's phone number.
+   * @param {Array} message - Array of strings, each element is a new line. Blank string(without whitespace) for a blank new line.
+   * @param {string} userId - Defaults to constructor value, but mandatory when `provider` is passed and different from constructor.
+   * @param {string} password - Defaults to constructor value, but mandatory when `provider` is passed and different from constructor.
+   * @returns {Promise} A response promise from the provider, if successful, the response will be in JSON format. Errors need to be handled separately.
+   */
+  sendSMS({ provider, from, to, message, userId, password }: {
+    provider: string,
+    from: string,
+    to: string,
+    message: Array<string>,
+    userId: string,
+    password: string
+  }): Promise<any>
+}
\ No newline at end of file
diff --git a/utils/errors.js b/utils/errors.js
new file mode 100644
index 0000000..23b281f
--- /dev/null
+++ b/utils/errors.js
@@ -0,0 +1,22 @@
+const Reset = "\x1b[0m"
+const Bright = "\x1b[1m"
+
+const FgWhite = "\x1b[37m"
+
+const BgRed = "\x1b[41m"
+
+export class GenericError extends Error {
+  constructor({
+    errType = 'UNKNOWN_ERROR',
+    errMsg = 'Unknown error occured',
+    additionalDetails = "If you would like to report this to the author, please raise an issue here: https://github.com/ParadoxInfinite/nodetifications/issues/"
+  }) {
+    super();
+    this.name = `${Bright}${BgRed}${FgWhite}${errType}`,
+      this.message = `${errMsg}.${Reset}\n${additionalDetails}`
+  }
+}
+
+export default {
+  GenericError
+}
\ No newline at end of file