Connect for free using Sign In with Neynar (SIWN). The app gets read and/or write access, Neynar pays for onchain registration.
https://demo.neynar.com
This is required to pass user credentials back to your application securely. This cannot contain wildcards or IP addresses.data-client_id
in the button code00b75745-xxxx-xxxx-xxxx-xxxxxxxxxxxx
signer_uuid
and fid
will be passed in via the data
object in the callback function.
signer_uuid
is unique to your app and is used to write to Farcaster on behalf of the user (same uuid format)fid
: This is the unique Farcaster identifier for the user e.g. 6131
user
: Neynar hydrated user object.signer_uuid
securely on your backend or the browser’s local storage, it’s not meant to be exposed to the user or anyone other than you. Switch the app to the logged-in state for that Farcaster user.
Handle insufficient permissions for the API calls except forstatusCode: 403
, errorResponse.code: InsufficientPermission
fid
for any read APIs and the signer_uuid
to do any write actions on behalf of the user in your App. You can try this flow yourself at demo.neynar.com