## Documentation Index

Fetch the complete documentation index at: [/llms.txt](https://docs.neynar.com/llms.txt)

Use this file to discover all available pages before exploring further.

## Post a cast

**Group:** Cast APIs

Use this when you need: **Post a cast**.

## Usage

```javascript
import { NeynarAPIClient, Configuration } from "@neynar/nodejs-sdk";

const client = new NeynarAPIClient(
  new Configuration({ apiKey: "YOUR_NEYNAR_API_KEY" })
);

const res = await client.publishCast({
  postCastReqBody: { /* request body */ }, // required
});
console.log(res);
```

## Parameters

| Parameter          | Type                  | Required | Description  |
| ------------------ | --------------------- | -------- | ------------ |
| `postCastReqBody` | `PostCastReqBody`    | ✅       | -            |

## Response

Returns a `RequestArgs` object.

## Error Handling

```javascript
try {
  const res = await client.publishCast({
    postCastReqBody: { /* request body */ }
  });
  // use res
} catch (err) {
  // Axios/HTTP errors, invalid params, auth issues, etc.
  console.error(err);
}
```

## Tips

- Provide a **viewerFid** when supported to respect mutes/blocks and include `viewer_context`.
- Keep requests scoped (e.g., use `limit`) to improve latency.
- Cache results where sensible.