> For the complete documentation index, see [llms.txt](https://timechain.gitbook.io/neucron-javascript-sdk/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://timechain.gitbook.io/neucron-javascript-sdk/payments-and-operations/customers.md).

# Customers

Accessor: `sdk.customer`

Create and manage customers for invoices, collections, and AR workflows.

## Method surface

| Method                          | Purpose        |
| ------------------------------- | -------------- |
| `sdk.customer.getCustomers()`   | getCustomers   |
| `sdk.customer.getCustomer()`    | getCustomer    |
| `sdk.customer.createCustomer()` | createCustomer |
| `sdk.customer.updateCustomer()` | updateCustomer |
| `sdk.customer.deleteCustomer()` | deleteCustomer |
| `sdk.customer.inviteCustomer()` | inviteCustomer |

## Basic usage

```typescript
import NeucronSDK from '@timechainlabs/neucron-ts-sdk';

const sdk = new NeucronSDK({ authToken: process.env.NEUCRON_TOKEN });

// Use sdk.customer methods after authentication.
```

## Notes

* Methods return `Promise<HttpResponse<T>>` unless they are local helpers such as token getters/setters.
* Authenticate with `sdk.auth.login()` or initialize with `authToken` before protected calls.
* Pass `businessId` on business-scoped operations; constructor-level `businessId` is typed but not applied globally.
* Request and response schemas are exported from `@timechainlabs/neucron-ts-sdk` and `@timechainlabs/neucron-ts-sdk/schemas`.