> ## 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.

# Security — non-custodial, atomic swaps on Vulcx

> Vulcx's security model on Fogo: non-custodial swaps you sign yourself, on-chain slippage protection, and atomic multi-hop transactions that revert if any hop fails.

## Non-custodial

Vulcx never holds or has access to your funds. The API returns unsigned transactions. Your wallet signs and submits them directly to the Fogo network.

## Atomic execution

All swap instructions execute atomically on-chain. If any hop in a multi-hop route fails (insufficient liquidity, slippage exceeded, etc.), the entire transaction reverts. No partial fills.

## Slippage protection

Every swap includes a slippage threshold (`slippageBps`, measured in basis points where 1 bps = 0.01%). The on-chain program enforces this. If the execution price deviates beyond the threshold, the transaction fails.

## Open-source verification

The on-chain program is verifiable. Integrators can inspect the instructions returned by the API to confirm exactly what will execute before signing.


## Related topics

- [Vulcx FAQ — Fogo swaps, chains, fees & limits](/get-started/faq.md)
- [Composing Swaps On-Chain (CPI)](/guides/onchain-cpi.md)
- [Vulcx architecture — how swaps are routed on Fogo](/get-started/architecture.md)
- [Health Check](/api-reference/health/index.md)
- [Widget wallet integration](/widget/wallet-integration.md)