---
title: "Customers"
description: "Customers represent payers in your integration. Create a customer with your own `customer_id` to associate their personal details and saved payment instruments with your business records.\n\nTo save a card, create a checkout for that customer with `purpose = SETUP_RECURRING_PAYMENT`, then process it with the payer's consent and mandate details. See the [tokenization guide](https://developer.sumup.com/online-payments/guides/tokenization-with-payment-sdk/).\n\nUse the Customers endpoints to create, retrieve, or update customer details and to list or deactivate saved payment instruments. For subsequent payments, process a new checkout with the saved instrument's `token` and its associated `customer_id`.\n\n**Objects:**\n\n- [Customer](/api/schemas/Customer/)"
image: "https://developer.sumup.com/og/index.png"
---

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Path: SumUp REST API

Customers represent payers in your integration. Create a customer with your own `customer_id` to associate their personal details and saved payment instruments with your business records.

To save a card, create a checkout for that customer with `purpose = SETUP_RECURRING_PAYMENT`, then process it with the payer's consent and mandate details. See the [tokenization guide](https://developer.sumup.com/online-payments/guides/tokenization-with-payment-sdk/).

Use the Customers endpoints to create, retrieve, or update customer details and to list or deactivate saved payment instruments. For subsequent payments, process a new checkout with the saved instrument's `token` and its associated `customer_id`.

**Objects:**

- [Customer](/api/schemas/Customer/)

## Operations

- [Create a customer](/api/customers/create/)
- [Retrieve a customer](/api/customers/get/)
- [Update a customer](/api/customers/update/)
- [List payment instruments](/api/customers/list-payment-instruments/)
- [Deactivate a payment instrument](/api/customers/deactivate-payment-instrument/)


Source: https://developer.sumup.com/api/tags/customers/index.md