## Hypersub subscription check

**Group:** Subscriber APIs

Use this when you need: **Hypersub subscription check**.

## Usage

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

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

const res = await client.fetchSubscriptionCheck({
  addresses: "example", // Comma separated list of Ethereum addresses, up to 350 at a time
  contractAddress: "example", // Ethereum address of the STP contract
  chainId: "example", // Chain ID of the STP contract
});
console.log(res);
```

## Parameters

| Parameter        | Type    | Required | Description                                                        |
| ---------------- | ------- | -------- | ------------------------------------------------------------------ |
| `addresses`      | `string`| ✅       | Comma separated list of Ethereum addresses, up to 350 at a time   |
| `contractAddress`| `string`| ✅       | Ethereum address of the STP contract                                |
| `chainId`       | `string`| ✅       | Chain ID of the STP contract                                       |

## Response

Returns a `RequestArgs` object.

## Error Handling

```
try {
  const res = await client.fetchSubscriptionCheck({
    addresses: "example",
    contractAddress: "example",
    chainId: "example"
  });
  // 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.