> ## Documentation Index
> Fetch the complete documentation index at: https://docs.unseen.finance/llms.txt
> Use this file to discover all available pages before exploring further.

# Server SDK — Errors & types

> UnseenApiError and exported TypeScript types from @unseen_fi/sdk.

This reference closes the Node SDK section: **`UnseenApiError`** for failure handling plus the exported **TypeScript mirrors** you see in tooling.

## UnseenApiError

Thrown when the HTTP response is not successful.

| Field     | Meaning                                      |
| --------- | -------------------------------------------- |
| `message` | Human-readable error string from the API.    |
| `status`  | HTTP status code (e.g. 401, 404, 422).       |
| `code`    | Machine-readable code (e.g. `unauthorized`). |
| `details` | Optional structured validation or context.   |

```ts theme={null}
import { UnseenApiError } from "@unseen_fi/sdk";

try {
  await unseen.payments.get("pay_bad");
} catch (e) {
  if (e instanceof UnseenApiError) {
    console.error(e.status, e.code, e.details);
  }
  throw e;
}
```

## Exported types

The package re-exports types such as `UnseenClientConfig`, `Network`, `CreatePaymentInput`, `Payment`, `PaymentStatus`, `PaymentList`, `ListPaymentsInput`, `VerifyResult`, `TxSignaturesResult`, `Pagination`, `Merchant`, and `ApiErrorBody` from the main entry.

Use your editor’s “Go to definition” on imports for the canonical fields.

**Next:** [Webhooks overview](/webhooks/overview)