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

# Fiat-to-Crypto On-Ramp

> A complete Merchant of Record on-ramp for consumer and enterprise crypto purchases, with built-in risk and compliance.

Sardine offers a comprehensive on-ramp solution for both consumers and enterprises. Whether your users are buying crypto via card or bank transfer, or your business is funding stablecoin wallets, we handle the full stack: Merchant of Record, KYC, compliance, payments, and fraud liability.

By combining payments with our industry-leading risk platform, we maximize approval rates, minimize fraud, and ensure a seamless experience for all use cases.

## Why Sardine?

<Info>
  **Key benefits of Sardine On-Ramp:**

  * **Higher Approval Rates:** Dynamic risk models and progressive limits allow more trusted users to transact with higher limits.
  * **Lower Fees, Less Fraud:** Embedded fraud detection keeps costs down while maintaining robust security.
  * **Faster Onboarding:** Reusable KYC reduces friction, streamlining flows for both consumers and enterprises.
</Info>

## See it in Action

Sardine powers on-ramps for some of the largest wallets and Web3 applications, including MetaMask. We enable users to instantly purchase crypto with higher approvals and fewer declines.

[**Watch how MetaMask users buy crypto with Sardine**](https://metamask.io/)

<iframe width="100%" height="420" src="https://www.youtube.com/embed/v57ntnSMaGU?si=xG_lQ7_-Rd7NFy2R" title="YouTube video player" frameBorder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerPolicy="strict-origin-when-cross-origin" allowFullScreen />

Beyond consumer wallets, our infrastructure supports fintechs, stablecoin issuers, and institutions for funding treasuries and payout flows at scale.

## Next Steps

* [Contact us](https://www.sardine.ai/contact) to get your sandbox API key.
* Read our [Integration Guides](/integration_guides/onofframps/quickstart) to start building.