keybase doesn't do OAuth but requires you to do unix beard like dance to prove identity AND publicly claim you are a keybase.io user .

keybase.md

Keybase proof

I hereby claim:

• I am timball on github.
• I am timball (https://keybase.io/timball) on keybase.
• I have a public key whose fingerprint is B579 29B0 F6C8 C7AA 3840 E053 FE02 BB97 511F BD54

To claim this, I am signing this object:

{
    "body": {
        "key": {
            "fingerprint": "b57929b0f6c8c7aa3840e053fe02bb97511fbd54",
            "host": "keybase.io",
            "key_id": "fe02bb97511fbd54",
            "uid": "52cd36bcdddde578bddae55fdbf12900",
            "username": "timball"
        },
        "service": {
            "name": "github",
            "username": "timball"
        },
        "type": "web_service_binding",
        "version": 1
    },
    "ctime": 1401994044,
    "expire_in": 157680000,
    "prev": "4750ba6c98bdea2ed155154c30886e4315cba0e303cd963717638e1a3213a132",
    "seqno": 3,
    "tag": "signature"
}

with the PGP key whose fingerprint is B579 29B0 F6C8 C7AA 3840 E053 FE02 BB97 511F BD54 (captured above as body.key.fingerprint), yielding the PGP signature:

-----BEGIN PGP MESSAGE-----
Version: GnuPG v1
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=dzMs
-----END PGP MESSAGE-----

And finally, I am proving ownership of the github account by posting this as a gist.

My publicly-auditable identity:

https://keybase.io/timball

From the command line:

Consider the keybase command line program.

# look me up
keybase id timball

# encrypt a message to me
keybase encrypt timball -m 'a secret message...'

# ...and more...