Today we will introduce a chrome extension for Cowin.

The chrome extension is a tool that helps you to use Cowin in a more efficient way. With just one click, you could save the content of the web page you are watching into your Cowin account.

It is convenient and fast!

Chrome Extension For Cowin

A browser extension for superfast automated booking of vaccine slots on CoWIN.

Installation
Chrome web store
CoWIN: Vaccinator 💉 is available on the chrome web store. Just click on Add to Chrome to add this extension to your browser.

Manual install
To manually install this extension, you need to enable the Developer mode.
Open extensions(chrome://extensions/) and check the box for “Developer mode” in the top right. For more details, click here.
You can now drag and drop or load the unpacked directory of files to install.

Drag and drop
Download the packed crx file from here.
Open extensions, or visit chrome://extensions/ and drag-and-drop the downloaded crx file on this page.

Load unpacked
Download the zipped zip file from here.
Unzip/extract files in a folder.
Open extensions, or visit chrome://extensions/ and click on “Load unpacked” to select the folder where you have extracted the zip file contents.

Uses
After installation, visit the CoWIN self-registration portal.
You’ll see a button to start the bot. Click on that button, fill in your details, and click on book my vaccine.
The bot will automatically fill in all your details on the CoWin website, and you only need to enter the OTP.
Once you enter the OTP, the bot will continuously search for available slots, and if found, it will auto-book it for you.

In case the bot is stuck or behaves unexpectedly, stop the bot and try refreshing the page.
All the data provided by you always stay on your computer. It is not stored/shared anywhere else.

Advanced Features
Superfast login
The bot saves your mobile number so, in case of log out, you only need to provide the OTP for a superfast login experience.

Multiple Pin Code
You can enter multiple comma(,) separated pin codes. The bot will search for the vaccine availability at all provided pin codes one by one.

Search By State & District
You can also search for vaccine availability with State & District. You can only search with pin codes or state and district.

Multi-User Accounts
The bot supports accounts with multiple registered members. You need to select the correct Member Number On Dashboard. Example: If you have 3 registered members in one account, you can use this bot to book vaccines for all the 3 members one by one. You just need to provide the correct member number(the order in which they are present on the dashboard) for every member on the dashboard.

Dose 2
The bot also supports automated superfast booking for the second dose of vaccine.

Vaccine Preference
You can select the vaccine type from Covishield / Covaxin / Sputnik. You can also limit your search for only free vaccines.

Choose Vaccine Centre
If Let Me Choose The Vaccination Center is checked, the bot will hide all unavailable slots so you can choose the vaccine center from the list of all available centers, based on your preference.

Autobook
If Autobook is selected, the bot will automatically select the available vaccination center and a time slot to autocomplete the booking for you.

Retry Interval
The interval after which the bot should retry searching. CoWIN allows 20 searches within 15 mins, please provide this value responsibly.

Rate Limit Pause
If selected, the bot automatically pauses after it reaches the 20 search rate limit in 15 mins and it automatically continues after the cool-down period.

Audio Alerts
You get an audio alert when a slot is found or when you need to enter your OTP so that you never miss the opportunity to book a slot.

Screenshots
Fill in your details.

Autobook vaccine

Let me choose vaccination center

Dose 2 vaccine

Bot Running…

Vaccine found submit now

Rate limit pause

Development
Clone the repository from github.com/ashish-r/cowin-vaccinator. DeepScan grade

npm run build
Transpiles the code to es5, bundles with manifest.json, and creates a zip file under the bin directory.

cowin bot chrome extension for desktop

Install and manage extensions
You can customize Chrome on your desktop by adding extensions from the Chrome Web Store.

Install an extension
Important: You can’t add extensions when you browse in Incognito mode or as a guest.

Open the Chrome Web Store.
Find and select the extension you want.
Click Add to Chrome.
Some extensions will let you know if they need certain permissions or data. To approve, click Add extension.
Important: Make sure you only approve extensions that you trust.
To use the extension, click the icon to the right of the address bar.

If you’re using a computer through your work or school, your organization might block some extensions.

Install on your phone
Install with a Windows or Mac application
Install with Enhanced Safe Browsing
Manage your extensions
On your computer, open Chrome.
At the top right, click More More and then More tools and then Extensions.
Make your changes:
Turn on/off: Turn the extension on or off.
Allow incognito: On the extension, click Details. Turn on Allow in incognito.
Fix corruptions: Find a corrupted extension and click Repair. Confirm by clicking Repair extension.
Allow site access: On the extension, click Details. Next to “Allow this extension to read and change all your data on websites you visit,” change the extension’s site access to On click, On specific sites, or On all sites.
Remove possible malware
Let extensions read and change site data
Some extensions need permission to read and change site data. You can change your extensions’ permissions anytime.

On your computer, open Chrome .
At the top right, click Extensions .
Click More Organize and then point to “This can read and change site data.”
Decide which permission to give the extension:
When you click the extension: This setting only allows the extension to access the current site in the open tab or window when you click the extension. If you close the tab or window, you’ll have to click the extension to turn it on again.
On [current site]: Allow the extension to automatically read and change data on the current site.
On all sites: Allow the extension to automatically read and change data on all sites.
Add or remove access to a specific site
On your computer, open Chrome.
At the top right, click More More and then More tools and then Extensions.
On the extension, click Details.
Under “Permissions,” add or remove a site:
Add: To the right of “Allowed sites,” click Add.
If you don’t see this option, change “Allow this extension to read and change all your data on websites you visit” to On specific sites.
Remove: To the right of the site, tap More More and then Remove.
Uninstall an extension
To the right of your address bar, look for the extension’s icon. Right-click the icon and select Remove from Chrome.

If you don’t see the extension’s icon:

On your computer, open Chrome.
At the top right, click More More and then More tools and then Extensions.
On to the extension you want to remove, click Remove.
Confirm by clicking Remove.

Conclusion

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