> ## 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.

# Turn on services around your payments

> Refresh stored cards, convert currencies and run recurring debits on local rails (Pix and UPI).

Guide hub

4 pages

Each service here runs on top of payments you already process. Turn one on when stored cards start to fail, when you settle in a currency other than your customer's, or when a local rail needs its own recurring flow.

> **[Start here: Card Account Updater](/docs/additional-services/card-account-updater.md)**
>
> Concept How Yuno refreshes expired or replaced card details on stored payment methods before a charge fails.

## 01 Build

> **[Currency conversion](/docs/additional-services/currency-conversion.md)**
>
> Guide Convert between your currency and the cardholder's, with the request parameters to send.

> **[QR code and Instant Payment](/docs/additional-services/qr-and-instant-pay.md)**
>
> Guide Charge a first Pix payment and enroll the customer for recurring charges with one QR code.

> **[UPI Autopay](/docs/additional-services/upi-autopay.md)**
>
> Guide Set up UPI mandates, pre-debit notifications and NPCI-compliant retries.

## 02 Operate

> **[Enroll cards with payment links](/docs/payment-features/enrollment/enroll-cards-with-payment-link.md)**
>
> Guide Send a link so a customer replaces a card that keeps declining.

> **[Smart Retries](/docs/payment-features/subscriptions/retries.md)**
>
> Guide Retry declined recurring card charges on an optimized schedule.

## Related API

Reference [Register cards for account updater](/reference/payment-methods-direct-workflow/register-cards-for-account-updater-api.md) [Currency conversion](/reference/conversion-rate/currency-conversion.md) [Create subscription](/reference/subscriptions/create-subscription.md)

## Next

<ol>
  <li>[Stored credentials](/docs/payment-features/stored-credentials.md)Guide Mark recurring charges as MIT so schemes accept them on a stored card.</li>
  <li>[Subscriptions](/docs/payment-features/subscriptions/index.md)Concept Let the Yuno engine create, pause, resume and cancel recurring billing.</li>
  <li>[Pix Automático](/docs/payment-features/subscriptions/pix-automatico.md)Guide Bill a Brazilian Pix Automático mandate as a subscription.</li>
  <li>[Webhook events](/docs/webhooks/events.md)Reference The payment and subscription events each recurring charge sends.</li>
</ol>


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