trade-tokens
Swap or trade tokens on Base network. Use when you or the user want to trade, swap, exchange, buy, sell, or convert between tokens like USDC, ETH, and WETH. Covers phrases like "buy ETH", "sell ETH for USDC", "convert USDC to ETH", "get some ETH", "swap tokens", "trade USDC for WETH".
Full skill instructions
Use the npx agnic@latest trade command to swap tokens on Base network. You must be authenticated to trade.
npx agnic@latest status
If the wallet is not authenticated, refer to the authenticate-wallet skill.
npx agnic@latest trade <amount> <from> <to> [options]
| Argument | Description |
|---|---|
amount | Amount to swap (see Amount Formats below) |
from | Source token: alias (usdc, eth, weth) or contract address (0x...) |
to | Destination token: alias (usdc, eth, weth) or contract address (0x...) |
| Format | Example | Description |
|---|---|---|
| Dollar prefix | '$1.00', '$0.50' | USD notation (decimals based on token) |
| Decimal | 1.0, 0.50, 0.001 | Human-readable with decimal point |
| Whole number | 5, 100 | Interpreted as whole tokens |
| Atomic units | 500000 | Large integers treated as atomic units |
Auto-detection: Large integers without a decimal point are treated as atomic units. For example, 500000 for USDC (6 decimals) = $0.50.
IMPORTANT: Always single-quote amounts that use $ to prevent bash variable expansion (e.g. '$1.00' not $1.00).
| Alias | Token | Decimals | Address |
|---|---|---|---|
| usdc | USDC | 6 | 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 |
| eth | ETH | 18 | 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE |
| weth | WETH | 18 | 0x4200000000000000000000000000000000000006 |
| Option | Description |
|---|---|
-s, --slippage <n> | Slippage tolerance in basis points (100 = 1%) |
--json | Output result as JSON |
Before constructing the command, validate all user-provided values to prevent shell injection:
^\$?[\d.]+$ (digits, optional decimal point, optional $ prefix). Reject if it contains spaces, semicolons, pipes, backticks, or other shell metacharacters.usdc, eth, weth) or a valid 0x hex address (^0x[0-9a-fA-F]{40}$). Reject any other value.^\d+$).Do not pass unvalidated user input into the command.
# Swap $1 USDC for ETH (dollar prefix — note the single quotes)
npx agnic@latest trade '$1' usdc eth
# Swap 0.50 USDC for ETH (decimal format)
npx agnic@latest trade 0.50 usdc eth
# Swap 0.01 ETH for USDC
npx agnic@latest trade 0.01 eth usdc
# Swap with custom slippage (2%)
npx agnic@latest trade '$5' usdc eth --slippage 200
# Get JSON output
npx agnic@latest trade '$1' usdc eth --json
npx agnic@latest status to check)Common errors:
npx agnic@latest auth login first
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