Creating a cast action with analytics using Neynar

Creating a cast action with analytics using Neynar

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Cast Action

In this guide, we’ll make a cast action with the neynar SDK and frog.fm, within a few minutes! The cast action will fetch the follower count of the cast's author using its fid and display it. We'll also validate the requests using Neynar's frame validator which provides analytics as well!

Before we begin, you can access the [complete source code](https://github.com/neynarxyz/farcaster-examples/tree/main/cast-action) for this guide on GitHub.

Let's get started!

Creating a new frames project

We will use [bun](https://bun.sh/) and [frog](https://frog.fm/) for building the cast action in this guide, but feel free to use [framejs](https://framesjs.org/), [onchainkit](https://onchainkit.xyz/), or anything else as well!

Enter this command in your terminal to create a new app:

Enter a name for your project and it will spin up a new project for you. Once the project is created install the dependencies:

cd <project_name>
bun install

Now, let's install the dependencies that we are going to need to build out this action:

bun add @neynar/nodejs-sdk dotenv

Creating the cast action route

Head over to the `src/index.ts` file. Here, you'll be able to see a starter frame on the / route. But first, let's change the Frog configuration to use `/api` as the base path and use neynar for hubs like this:.