diff --git a/README.md b/README.md
index 78b4470..dc01127 100644
--- a/README.md
+++ b/README.md
@@ -24,6 +24,13 @@ Browser Authenticator
 
 You may also be interested in [Browser Authenticator](https://github.com/Daplie/browser-authenticator) over at <https://github.com/Daplie/browser-authenticator>
 
+OTPAuth Scheme
+--------------
+
+* <https://github.com/google/google-authenticator/wiki/Key-Uri-Format>
+* `otpauth://totp/<<ISSUER>>:<<ACCOUNT_NAME>>?secret=<<BASE32_KEY>>&issuer=<<ISSUER>>`
+* `otpauth://totp/<<ISSUER>>:<<ACCOUNT_NAME>>?secret=<<BASE32_KEY>>&issuer=<<ISSUER>>&algorithm=<<ALGO>>&digits=<<INT>>&period=<<SECONDS>>`
+
 Usage
 =====