Farcaster Toolkit

The FarcasterToolkit is a simple langchain toolkit that exports some useful tools to create new casts on Farcaster, or to reply to existing ones.

This tools can be useful to create a Farcaster AI Agent capable of writing casts on Farcaster.

Usage

In order to get the tools of the FarcasterToolkit, you need to have a valid SIGNER_UUID and a NEYNAR_API_KEY that will be used to send the casts to Farcaster.

import { FarcasterToolkit } from "@brian-ai/langchain";
 
const { tools } = new FarcasterToolkit({
  neynarApiKey: process.env.NEYNAR_API_KEY,
  signerUUID: process.env.SIGNER_UUID,
});
 
// import the tools in your langchain agent

Tools

Publish cast

The publishCast tool is a tool that allows the agent to publish a new cast on Farcaster.

await publishCastTool.invoke({
  text: "Brian is such an awesome project!",
});

Reply to cast

The replyTast tool is a tool that allows the agent to reply to an existing cast on Farcaster.

await replyCastTool.invoke({
  text: "This is a reply to an existing cast!",
  cast: CAST_ID,
});