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

# Overview

> Everything you need to connect to Stable, send USDT0, and build payment flows on a USDT-native Layer 1.

Stable is an EVM-compatible Layer 1 where USDT0 is the native gas token. Most Ethereum tools, libraries, and contract patterns work without modification. You connect by pointing your RPC to Stable and switching the chain ID.

## Connect and fund

<CardGroup cols={2}>
  <Card title="Connect" icon="cable" href="/en/reference/connect">
    Mainnet and testnet chain IDs, RPC endpoints, block explorers.
  </Card>

  <Card title="Fund your testnet wallet" icon="droplets" href="/en/how-to/use-faucet">
    Get testnet USDT0 via the faucet or bridge from Sepolia.
  </Card>

  <Card title="Stable SDK" icon="package" href="/en/explanation/sdk-overview?utm_source=docs&utm_medium=integrate-overview">
    Use the typed TypeScript client for transfer, bridge, and swap.
  </Card>
</CardGroup>

## Build with USDT0

<CardGroup cols={2}>
  <Card title="Send your first USDT0" icon="send" href="/en/tutorial/send-usdt0">
    Native and ERC-20 transfers with TypeScript examples.
  </Card>

  <Card title="USDT0 behavior on Stable" icon="split" href="/en/explanation/usdt0-behavior">
    Dual-role balance reconciliation, contract design requirements, migration checklist.
  </Card>

  <Card title="Differences from Ethereum" icon="git-compare" href="/en/explanation/ethereum-comparison">
    Single-slot finality, USDT0 gas, no priority tips.
  </Card>

  <Card title="Zero-gas transactions" icon="zap" href="/en/how-to/integrate-gas-waiver">
    Gas Waiver integration via the Waiver Server API.
  </Card>
</CardGroup>

## Payments

<CardGroup cols={2}>
  <Card title="ERC-3009" icon="pen-line" href="/en/explanation/erc-3009">
    Transfer With Authorization: the on-chain settlement primitive.
  </Card>

  <Card title="x402" icon="globe" href="/en/explanation/x402">
    HTTP-native payments with no accounts or API keys.
  </Card>

  <Card title="P2P payments" icon="arrow-left-right" href="/en/reference/p2p-payments">
    Native and ERC-3009 delegated transfers.
  </Card>
</CardGroup>

## Ecosystem

Providers and infrastructure already live on Stable: bridges, oracles, RPCs, wallets, custody, and more. Browse the [Ecosystem](/en/reference/bridges) section for the full list.