IndieAuth is a way to use your own domain name to sign in to websites — it's like OpenID, but works with services you likely already use, and is much easier to setup.
IndieAuth was built to make it as easy as possible for users and for developers to start using this new way of signing in on the web, without the complexities of OpenID.
IndieAuth is part of taking back control of your online identity. Instead of logging in to websites as "you on Twitter" or "you on Facebook", you should be able to log in as just "you". We should not be relying on Twitter or Facebook to provide our authenticated identities, we should be able to use our own domain names to log in to sites everywhere.
The #1 reason to setup IndieAuth is because you've found this wiki, and setting up IndieAuth will allow you to login and contribute to the community, including doing common things like:
Use IndieAuth for your OpenID
To use indieauth.com as an OpenID delegate for the OpenID identifier of your site, add the following two link tags to the HTML (inside the
<link rel="openid.delegate" href="http://aaronparecki.com/" /> <link rel="openid.server" href="https://indieauth.com/openid" />
Many Micropub implementations use IndieAuth for authentication, including:
(This section is a stub and needs expansion!)
There are a growing number of web sites that you can log into using IndieAuth and gain additional functionality:
Table of Contents
Why is my https domain not working?
Q: Why does entering just my domain name (which automatically redirects http to https) not work in IndieAuth?
A: To log in with indieauth as a domain served over HTTPS, you have to type the whole URL, including https://, otherwise most implementations will assume HTTP, and HTTP to HTTPS redirects are considered insecure (especially important for purposes of authentication!)
Why is Twitter not working
While there are several reasons why Twitter might not working for IndieAuth sign-in, here are some common things to look for:
Why is GitHub not working
Why am I getting "insecure redirect" errors?
Why is Google+ not working
Why is IndieAuth and GitHub Pages not playing nicely?
Are you getting a funny error when trying to log into IndieAuth with credentials hosted on your Github Pages powered website? This is likely due to an outdated DNS record!
What is happening is that if your DNS record points to the old github pages IP address, it sometimes 301 redirects to `/` which is non-standard and IndieAuth does not currently support relative URLs when discovering credentials. See this issue: https://github.com/aaronpk/IndieAuth/issues/46#issuecomment-34565297
Github also wrote a blog post about this change, which many people missed: https://github.com/blog/1715-faster-more-awesome-github-pages
For how to do distributed or delegated IndieAuth, see distributed-indieauth.
How do I use a specific other site for my IndieAuth
Is it good to delegate auth to 3rd parties
Is it good to delegate authentication to third parties like Facebook or Twitter for IndieAuth?
IndieAuth only relies on third parties for ephemeral authentication, once per IndieAuth login attempt. Because the reliance is only ephemeral/transactional, the delegation is ok. It's not great, but it's ok, and certainly better than directly using (Facebook Connect) or the equivalents for other silos.
IndieAuth also provides better UI flow and fallbacks than OpenID, while re-using the OAuth flow that users are familiar with from Twitter, Github etc., so it's an incremental improvement over other open identity solutions.
What if I have more than one domain
IndieAuth requires symmetric rel=me links on your page and the OAuth provider profile page, and since most silos (like Github and Twitter) only allow you to put one rel=me link on your profile, you cannot use any one profile for multiple domains. There are a few alternatives:
Why not use a DNS TXT record
Q: Why not allow configuring a rel=me link by adding a DNS TXT record to the domain?
A: Two reasons:
Why not OpenID Email etc
See: Why web sign-in.
Why not WebFinger
Why not add WebFinger support to IndieAuth?
"The problem is it's too easy to not own your email address (@gmail.com, etc) so it's not really an "indie" identifier. The point of IndieAuth is to encourage people to own their online identity."
Why is the IndieAuth verification response form-encoded instead of JSON
IndieAuth uses standard form-encoding for requests and response because it has been a standard encoding format since the beginning of the web. If it were a JSON response, then 7 years down the road you'd be asking "why is the response in JSON instead of ____" where ____ is the next trendy thing that replaces JSON. (Remember when XML was the new hotness?)
Proposal for content negotiation: https://www.tuxed.net/fkooman/blog/proposed_changes_to_indieauth_protocol.html#content_negotiation — Wwelves.org perpetual-tripper 02:26, 5 March 2015 (PST)
See Frequently Asked Questions for more FAQs.
The IndieAuth.com Service
The IndieAuth.com service lets you support RelMeAuth logins without writing all the OAuth code for each provider! It also supports a few additional non-OAuth providers such as Email, SMS and GPG.
The IndieAuth.com source code is available on GitHub. Feel free to fork it and submit pull requests if you make any changes!
Auth consumers (e.g. Upcoming.org: https://www.kickstarter.com/projects/waxpancake/the-return-of-upcomingorg/posts/1167812) want to quickly allow users to to follow people and organizations they're already interested in, e.g. their lists of followings from their personal website. Opening the Source and The Great Auth Debate, ,
For events in particular, people are likely to want to attend events with friends.
Auth consumers (e.g. Upcoming.org: https://www.kickstarter.com/projects/waxpancake/the-return-of-upcomingorg/posts/1167812) want location information for users. Knowing a user's current location is critical information for event sites, e.g. getting current city at login time (for onboarding, or showing events near you). Opening the Source and The Great Auth Debate, ,
Please open specific bugs and action items on the IndieAuth Github project. This page is for collecting thoughts that may not yet be action items or for things that apply to the IndieAuth protocol in general rather than the indieauth.com implementation.
Contact page support
Some sites (which? list examples below) have a separate /about or /contact page where they list all their other profiles with rel-me links, and then link to that separate page from their home page with rel=me. This is a valid way to support web-sign-in per the relmeauth spec.
However, IndieAuth does not currently support following one-deep rel-me links on people's sites to look for auth providers.
Note: Crawling the second level of links will add significant time to the "scan" part of indieauth. One optimization is to only crawl a second level link if it's on the same domain as the authenticating domain. This means you wouldn't be able to have the chain example.com -> about.me/example -> github.com/example, you'd have to have something like example.com -> example.com/about -> github.com/example. Aaronparecki.com 09:08, 1 September 2013 (PDT)
Sites in the wild with a contact page separate to the homepage
Need Simple Copy Paste How To
The explanation in http://waterpigs.co.uk/articles/indiewebcamp-signin-ux/ provides a list of three lengthy descriptions of what you need to setup IndieAuth, which was then subsequently criticized as "this is not a straightforward process" in the post: http://aralbalkan.com/notes/on-evolving-indieauth/
Thus we need a a simple copy paste how to that is not three lengthy descriptions.
Any explanation of how to use IndieAuth needs to start with a 1-2 sentence summary. No more.
Explanations for IndieAuth need to be at least as simple to understand as those for Twitter Sign-in and Facebook Connect.
Selectively Displaying rel-me Info
Selectively Displaying rel-me Info (e.g. hiding your phone number).
Tantek points out that he would like to be able to use SMS auth on IndieAuth, but doesn't want his cell phone number public on his site. 
Ideally your site would know that the request was coming from an (your?) IndieAuth server, and only render your phone number if so.
This would require either
Here is a potential example flow.
2 public key
Please document here if there is some other existing mechanism that can solve this!
A potential workaround is putting your phone number in a
Better Error Handling
My experience was that I had a slight URL mismatch when I first tried to set up IndieAuth, something like an http/https goof or having a trailing slash in one place and no trailing slash in the other. Whatever the problem, it prevented sign-in. I figured out that problem, but when I tried to sign back in, I got the error:
Parameter "profile" must be one of the rel=me links in the site specified in the "me" parameter
This didn’t make any sense to me, as a novice to IndieAuth. After several failed retries, I finally realized that IndieAuth.com had cached my old URL and needed me to rescan to pick up the corrected information. Once I did that, everything worked -- Eric Meyer
Two possible fixes here:
What About RDFa Problems
If you use RDFa and are having problems, see rel=me: What about RDFa Problems.
Want to help? See if you can contribute to one or more of the following: