Open Source Protocol


The Open Source Protocol is a way of telling developers where to access the source code for your website, if the source code is hosted in an open source repository on the public internet.

The OS Protocol uses metatags. To include an open source metatag on your website, simply add <meta /> tags for the following properties:

This is not a place to link to code that is described on your website; rather, this is for the code for the actual website. That way, if anyone reading your website sees an error - a spelling mistake, broken CSS, etc. - or something they want to examine - a cool paralax library, etc. - they can quickly fetch the source code.

The os protocol is loosely based on the Open Graph protocol, which in turn is based on RDFa. os stands for “open source”.

A link element must be added in order to adhere to the standard. This is similar to the now deprecated profile attribute, which used to go into the <HEAD />.


<link rel="profile" href="" />
<meta property="os:repo" content="" />
<meta property="os:rcs_type" content="git" />
<meta property="os:src" content="" />

Optional tags

Other tags that can be used:


<meta property="os:issue" content="" />
<meta property="os:commit" content="1sda73d" />
<meta property="os:branch" content="gh-pages" />


For use in the repository, to show your compliance and spread the word:


Participating Websites

This is a list of websites which have adopted this protocol. If you know of any others, please add them here.

Projects building on OSP:


This is a work in progress. Please open an issue to discuss how the Open Source Protocol can be improved. PRs are encouraged!

If you use the OSProtocol, please add your site above. Also, tell your friends.

To automatically copy from master to gh-pages, use the hook on gh-pages in dev. (Note: It doesn’t like git add -p).


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This project is maintained by RichardLitt.