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Farcaster sign-in runs through Neynar, so the application you register is a Neynar app and the keys you copy back are Neynar’s.
PostQueen uses Neynar as the Farcaster API provider. You need a Neynar developer account to obtain the API credentials below.

Set up Farcaster

1

Create a Neynar app

Go to the Neynar dashboard and create a new app. You will get a Client ID and a Secret Key.
There is no redirect URI to set here, which is why this page has no callback block while every other OAuth network does. Farcaster sign-in goes through Neynar’s widget, so PostQueen hands it the client ID directly rather than building a callback path for the network to return to.
2

Add credentials to your environment

Add the following to your .env file:
3

Restart PostQueen

Stop PostQueen if it is running and start it again so the new environment variables are picked up.
4

Add the channel

In the PostQueen web interface, click Add Channel, select Farcaster, and complete the Neynar login flow. Your Farcaster account will appear in the channel list.
The channel is in the left sidebar with its avatar and name. That is the whole confirmation: if it is in the list, she can post to it.

Next steps

What she can post to Farcaster

Limits, post types and settings

Configuration reference

Every variable she reads

Connect errors

Invalid state, invalid_grant and the rest

Another channel

Every network, and what each one asks for