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

# Swap fees — pool & aggregator fees explained

> How Vulcx swap fees work on Fogo: DEX pool fees (feeBps) plus the aggregator fee (feeAmount). amountIn and amountOut already include every cost — no hidden fees.

## Pool fees

Each liquidity pool charges its own fee per swap hop. These fees are set by the pool operators (Vortex, Fluxbeam, Fogo.fun, Moonit) and are deducted from the swap amount automatically.

The `feeBps` field in the quote response shows the total fee across all hops in basis points (bps, where 1 bps = 0.01%).

## Aggregator fees

Vulcx may charge a small protocol fee on certain routes. This fee is included in the `feeAmount` field of the swap and instructions responses, denominated in the output token's smallest units.

## No hidden fees

The amounts returned by the API (`amountIn`, `amountOut`) already account for all fees. What you see in the quote is what you get on-chain, subject to slippage tolerance.


## Related topics

- [Vulcx FAQ — Fogo swaps, chains, fees & limits](/get-started/faq.md)
- [sdk.instructions()](/sdk/instructions.md)
- [Get Instructions](/docs/swap/get-instructions.md)
- [sdk.swap()](/sdk/swap.md)
- [Build Transaction](/docs/swap/build-transaction.md)