> ## Documentation Index
> Fetch the complete documentation index at: https://docs.neynar.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Sign In with Farcaster

Sign In with Farcaster (SIWF) is a way for users to sign into any app using their
Farcaster identity.

When a user signs into your application with Farcaster you'll be able to use
public social data like their social graph and profile information to provide
a streamlined onboarding experience and social-powered features.

### How does it work?

1. Show a "Sign in with Farcaster" button to the user.
2. Wait for the user to click, scan a QR code and approve the request in Farcaster.
3. Receive and verify a signature from Farcaster.
4. Show the logged in user's profile picture and username.

<img src="https://mintlify.s3.us-west-1.amazonaws.com/neynar/farcaster/developers/siwf/siwf_demo.avifs" alt="Sign In with Farcaster demo" />

## Next Steps

* Integrate SIWF to your app today with [AuthKit](/farcaster/auth-kit/).
* Read about the underlying standard in [FIP-11: Sign In With
  Farcaster](https://github.com/farcasterxyz/protocol/discussions/110).