> For the complete documentation index, see [llms.txt](https://docs.tylt.money/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.tylt.money/tylt-crossramp-fiat-crypto-solutions/india-inr/upi-payin-inr-usdt.md).

# UPI Payin (INR → USDT)

<figure><img src="/files/swp0zmHqNbwgfME6QmmB" alt=""><figcaption></figcaption></figure>

This section provides a reference for integrating Tylt CrossRamp’s UPI on-ramp flow within merchant applications. Through this integration, end users initiate INR transfers via UPI, which are facilitated through a peer-to-peer (P2P) network of liquidity providers. These flows are used to enable the acquisition of stablecoins, which are subsequently transferred to the merchant.

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#### Flow Overview

* End users initiate UPI transfers through the embedded widget
* Fiat leg is executed via P2P matching with liquidity providers
* Upon confirmation, the corresponding crypto-asset conversion is executed
* Resulting USDT is transferred to the merchant

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#### What You’ll Find in the API Reference

**1. UPI On-Ramp Flow (INR → USDT)**\
Guidance for enabling end users to initiate UPI transfers via the P2P network and complete on-ramp transactions, including lifecycle tracking and reconciliation.

**2. Supporting APIs**\
Documentation for auxiliary endpoints, including supported currencies, networks, and system capabilities.

**3. Endpoint Descriptions**\
Detailed specifications for all API endpoints, including parameters, authentication requirements, and usage patterns.

**4. Request & Response Formats**\
Structured JSON examples covering on-ramp creation, status tracking, webhook payloads, and error handling.

**5. Code Examples**\
Reference implementations in Node.js, Python, and other commonly used stacks.

**6. Error Handling**\
Common error scenarios, causes, and recommended handling strategies.

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#### Summary

This API enables merchants to embed UPI-based on-ramp functionality, allowing end users to acquire stablecoins via P2P-facilitated fiat flows, with settlement managed in USDT through Tylt’s crypto-asset infrastructure.