# Fia Signals Guarded Swap Execute Dry Run

> Fia Signals Guarded Swap Execute Dry Run is a paid API for AI agents from x402.fiasignals.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).

Simulates a guarded swap execution to preview estimated outcomes, fees, and risk checks before committing a real on-chain trade.

## Facts

- Endpoint: POST https://x402.fiasignals.com/acp-direct/guarded-swap-execute-dry-run
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-fiasignals-com-3a2fbde8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_9DsDppEHn_dx4M_xZt5be

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability x402-fiasignals-com-3a2fbde8 -d '<json body>'
```

Example prompt: Before I actually execute it, can you dry-run a swap of 100 USDC to ETH on Base and show me the estimated output, fees, and any risk flags so I know what to expect?

## When to prefer this

Use this endpoint when an AI agent needs to preview the outcome of a guarded swap before committing real funds — especially useful for risk-averse trading workflows, user confirmation flows, or when validating that swap parameters will yield acceptable results. Prefer this over a live execution endpoint when the goal is estimation, validation, or user approval without on-chain side effects.

## Known failure modes

- Invalid token pair returns an error indicating unsupported or unrecognized tokens
- Insufficient liquidity for the requested swap amount results in a simulation failure
- Malformed swap parameters cause a 400-level validation error
- Smart contract risk check flags the token as unsafe, blocking simulation
- Network or RPC issues may cause a 500-level server error
- Missing required fields such as amount or token addresses return a parameter error

## How this service works

Simulates a guarded swap execution to preview outcomes before sending a real trade.

## Output

Returns a simulated swap execution result including estimated output token amount, fee breakdown, slippage impact, risk flags from the guarded execution layer, and a preview of whether the trade would succeed — without sending any real transaction.

## Example request

```json
{
 "chainId": 8453,
 "tokenIn": "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48",
 "amountIn": "100000000",
 "tokenOut": "0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2",
 "slippageTolerance": 0.5
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-fiasignals-com-3a2fbde8/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.fiasignals.com](https://www.zero.xyz/host/x402.fiasignals.com/llms.txt)