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

# Introduction

> Partner API overview for USDT ↔ USTBL flows on Liquid

# Nexbridge Partner API

The Nexbridge Partner API enables approved partners to programmatically create and monitor subscription and redemption requests between **USDT** and **USTBL** on Liquid.

This documentation describes the external partner-facing behavior of the API, including supported assets, address management, quotes, requests, funding visibility, and operational rules.

> This documentation does not expose Nexbridge internal treasury, custody, routing, or matching infrastructure.

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# Supported Flows

## Subscription

Convert USDT into USTBL.

`USDT → USTBL`

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## Redemption

Convert USTBL into USDT.

`USTBL → USDT`

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# What Partners Can Do

* Register and manage payout addresses used for settlement
* Obtain executable quotes for supported flows
* Submit subscription and redemption requests
* Monitor balances, funding activity, and request statuses

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# Core Concepts

## Address

Approved payout address for a specific asset and network.

## Quote

Executable commercial terms with expiration.

## Request

Subscription or redemption instruction.

## Funding Activity

Funding tracked through its lifecycle.

## Balance

Partner balance by asset.

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# Integration Lifecycle

1. Register payout address
2. Wait for address approval
3. Request quote
4. Create request
5. Fund request
6. Track request status
7. Receive settlement

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# V1 Scope

| Area            | Supported                                |
| --------------- | ---------------------------------------- |
| Assets          | USDT, USTBL                              |
| Network         | Liquid                                   |
| Request Types   | Subscription, Redemption                 |
| Quote Model     | Executable quote with expiration         |
| Funding         | Partial funding supported                |
| Address Model   | Approved addresses required              |
| Status Tracking | Request and funding lifecycle visibility |

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# Out of Scope for V1

* Partner self-service onboarding
* Manual balance adjustments
* Treasury operations
* Manual fund movements
* Webhook notifications
* Partner-managed API key creation