> ## Documentation Index
> Fetch the complete documentation index at: https://docs.tokenlayer.network/llms.txt
> Use this file to discover all available pages before exploring further.
# Supported Stablecoins
> Stablecoins accepted on Token Layer for trading
## Overview
Token Layer uses stablecoins as the base currency for all token trading. Each network supports specific stablecoins that are used for buying and selling tokens.
## Why Stablecoins?
Token Layer uses stablecoins instead of native tokens (ETH, BNB, SOL) for several reasons:
✅ **Price Stability**: Consistent USD-pegged value
✅ **Clear Pricing**: Easy to understand token prices
✅ **Cross-Chain Consistency**: Same pricing across networks
✅ **Lower Volatility**: Protects against market swings during trades
## Mainnet Stablecoins
### USDC (USD Coin)
The primary stablecoin used across most networks.
**Token**: USDC
**Decimals**: 6
**Address**: `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`
**Token**: USDC
**Decimals**: 6
**Address**: `0xaf88d065e77c8cC2239327C5EDb3A432268e5831`
**Token**: USDC
**Decimals**: 6
**Address**: `0xB97EF9Ef8734C71904D8002F8b6Bc66Dd9c48a6E`
**Token**: USDC
**Decimals**: 6
**Address**: `0x078D782b760474a361dDA0AF3839290b0EF57AD6`
**Token**: USDC
**Decimals**: 6
**Address**: `0x84A71ccD554Cc1b02749b35d22F684CC8ec987e1`
**Token**: USDC
**Decimals**: 6
**Address**: `0x754704Bc059F8C67012fEd69BC8A327a5aafb603`
**Token**: USDC
**Decimals**: 6
**Address**: `EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v`
### USDT (Tether)
Used on networks where USDT has deeper liquidity.
**Token**: USDT
**Decimals**: 6
**Address**: `0xdAC17F958D2ee523a2206206994597C13D831ec7`
**Token**: USDT
**Decimals**: 18
**Address**: `0x55d398326f99059fF775485246999027B3197955`
**Token**: USDT
**Decimals**: 18
**Address**: `0x9e5AAC1Ba1a2e6aEd6b32689DFcF62A509Ca96f3`
### USDT0 (Polygon)
**Token**: USDT0
**Decimals**: 6
**Address**: `0xc2132D05D31c914a87C6611C10748AEb04B58e8F`
## Testnet Stablecoins
### USDTL (Token Layer Test Token)
Custom test stablecoin for testnets, mintable via faucet.
**Token**: USDTL
**Decimals**: 18
**Address**: `0xED0E8956D5e7b04560460BE6B3811B0b31cEe8E1`
**Faucet**: Available
**Token**: USDTL
**Decimals**: 18
**Address**: `0xED0E8956D5e7b04560460BE6B3811B0b31cEe8E1`
**Faucet**: Available
### Test USDC (Solana Devnet)
**Token**: USDC
**Decimals**: 6
**Address**: `4zMMC9srt5Ri5X14GAgXhaHii3GnPAEERYPJgZJDncDU`
See [Testnet Guide](/onboarding/testnet) for instructions on obtaining test stablecoins.
## Decimal Precision
Pay attention to decimal precision when integrating with the API. Different stablecoins have different decimal places.
**6 Decimals** (most common):
* USDC on most chains
* USDT on Ethereum
* USDT0 on Polygon
**18 Decimals**:
* USDT on BNB Chain
* USDT on OP BNB
* USDTL on testnets
### Example Amounts
For 100 USD:
```javascript theme={null}
// 6 decimals (USDC on Base)
amount = 100 * 10^6 = 100000000
// 18 decimals (USDT on BNB)
amount = 100 * 10^18 = 100000000000000000000
```
## Getting Stablecoins
### Mainnet
You can obtain stablecoins through:
**Centralized Exchanges:**
* Buy on Coinbase, Binance, Kraken, etc.
* Withdraw to your wallet on the appropriate chain
**DEX Swap:**
* Swap native tokens (ETH, BNB, SOL) for stablecoins
* Use Uniswap, PancakeSwap, Jupiter, etc.
**Bridge:**
* Bridge stablecoins from other chains
* Use official bridges or aggregators like Stargate, Across
**On-Ramp:**
* Use fiat on-ramp services
* MoonPay, Transak, Ramp Network
### Testnet
Get free testnet stablecoins from Token Layer's faucet at [app-testnet.tokenlayer.network](https://app-testnet.tokenlayer.network)
You can mint up to 10,000 USDTL per request for testing.
## API Integration
When making API calls, amounts are always specified in the smallest unit:
```json theme={null}
{
"chainSlug": "base",
"buyAmountUSD": 100, // API accepts USD amounts
"direction": "buy"
}
```
Token Layer handles the decimal conversion automatically based on the chain's stablecoin.
For direct contract interaction, use proper decimals:
```javascript theme={null}
// Example: 100 USDC on Base (6 decimals)
const amount = BigInt(100) * BigInt(10 ** 6);
// Example: 100 USDT on BNB Chain (18 decimals)
const amount = BigInt(100) * BigInt(10 ** 18);
```
## Stablecoin Smart Contracts
All stablecoins are standard ERC-20 (EVM) or SPL (Solana) tokens. You can:
* View balances using standard token methods
* Approve spending for Token Layer contracts
* Transfer between addresses
* Check on block explorers
### Checking Balances
**EVM (Web3.js/Ethers.js):**
```javascript theme={null}
const balance = await usdcContract.balanceOf(userAddress);
const decimals = await usdcContract.decimals();
const humanReadable = balance / (10 ** decimals);
```
**Solana (Solana Web3.js):**
```javascript theme={null}
const balance = await connection.getTokenAccountBalance(
tokenAccountAddress
);
const humanReadable = balance.value.uiAmount;
```
## Network-Specific Notes
### Ethereum
* USDT has non-standard ERC-20 implementation
* Use caution with approve/transferFrom patterns
* Higher gas costs for transactions
### BNB Chains
* USDT has 18 decimals (unusual)
* Lower gas costs than Ethereum
* Fast confirmation times
### Solana
* Uses SPL token standard (not ERC-20)
* Requires token account creation
* Extremely low fees
## Stablecoin Selection Logic
Token Layer automatically selects the stablecoin based on:
1. **Network**: Each network has a designated stablecoin
2. **Liquidity**: Uses the stablecoin with deepest liquidity
3. **User Balance**: Checks which stablecoin you hold
You cannot choose a different stablecoin—each network uses its designated stablecoin for consistency.
## Future Support
Token Layer may add support for additional stablecoins based on:
* User demand
* Liquidity depth
* Regulatory clarity
* Technical compatibility
## Need Help?
Click the chat icon in the bottom right corner for stablecoin-related questions.
