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

# Understand how a Yuno payment moves

> The objects behind every Yuno payment (customers, sessions, payments, transactions, tokens and webhooks) in one reading order.

Concept hub

9 pages

Read these pages before you write integration code. Each one explains one object in the Yuno API, what creates it, and which ID or status your backend keeps from it.

> **[Start here: How a Yuno payment flows](/docs/how-yuno-works/how-yuno-payment-flow-works.md)**
>
> Concept Every step from customer to payment result, in order, with what you send and what Yuno returns.

## 01 Set up

> **[Customers](/docs/basic-concepts/customers.md)**
>
> Concept What the customer object stores and why its ID goes into sessions and payments.

> **[Payment methods](/docs/basic-concepts/payment-methods.md)**
>
> Concept How a payment method differs from a processor, and which methods support enrollment.

> **[Sessions](/docs/basic-concepts/sessions.md)**
>
> Concept When to open a customer session to enroll a method and when to open a checkout session to pay.

## 02 Build

> **[Tokens](/docs/basic-concepts/tokens.md)**
>
> Concept One-time, vaulted and network tokens compared, and which one to store for repeat payments.

> **[Payments](/docs/basic-concepts/payments-1.md)**
>
> Concept The payment object, its status lifecycle, and how its transactions decide the final status.

> **[Transactions](/docs/basic-concepts/transactions.md)**
>
> Concept Purchase, authorize and verify, then the refunds, cancels and captures that follow them.

## 03 Operate

> **[Webhooks](/docs/basic-concepts/webhooks-1.md)**
>
> Concept How Yuno posts status changes to your URL so your backend does not poll.

> **[Glossary](/docs/glossary.md)**
>
> Reference Short definitions of the terms on these pages, each linked to the page that explains it.

## Related API

Reference [Create customer](/reference/customers/create-customer.md) [Create checkout session](/reference/checkout-sessions/create-checkout-session.md) [Create payment](/reference/payments/create-payment.md)

## Next

<ol>
  <li>[Quickstart](/docs/quickstart.md)Tutorial Send one sandbox payment with a test card and see it in the dashboard.</li>
  <li>[Configure webhooks](/docs/webhooks/configure-webhooks.md)Guide Set the endpoint, the triggers and HMAC or OAuth2 authentication for a webhook.</li>
  <li>[Direct flow integration](/docs/direct-integration-use-cases/direct-flow.md)Guide Create customers, payments and enrollments from a PCI-certified backend, without the SDK.</li>
  <li>[Developers](/docs/developers.md)Reference Base URLs, API keys, OpenAPI specs and SDK versions on one page.</li>
</ol>


This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.