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MEV / Sandwich Guard
x402
MEV / Sandwich Guard is a paid API for AI agents from 402.com.tr, paid per call via x402, $0.04/call, status unknown (last checked 2026-10-29).
Assesses MEV sandwich attack exposure for a token trade and returns an exposure level plus a protected execution plan with optimal slippage, private mempool routing, and order splitting.
Price / call$0.04
Success—
StatusUnknown
How this service works
Agents are the easiest MEV prey: predictable, public-mempool, a measured ~$50M/quarter tax. A sandwich only pays when a trade moves the pool enough to front-run (size vs pool depth). This returns an exposure read (low/elevated/high) and a protected-execution plan: a tight min-out, private/off-mempool inclusion (a Cobalt validity tx via validity-build), and splitting a large order into unattackable chunks. Pass tokenOut + amountUsd. Not financial advice.
Output
Returns an MEV exposure rating (low, elevated, or high), a recommended minimum output (min-out) to set as slippage protection, instructions for private/off-mempool transaction inclusion via a Cobalt validity transaction, and a suggested order-splitting strategy to break large trades into MEV-resistant chunks.
Example use cases
Pre-swap MEV risk check for large trade
“Before I swap $20,000 into WBTC, can you check how exposed that trade is to sandwich attacks and give me a protected execution plan with the right min-out and any order splitting I should do?”
Automated agent trade protection
“My trading agent is about to buy $3,500 of OP token — can you run a sandwich guard check first and tell me if it should use private mempool routing or split the order?”
Small trade safety assessment
“Is a $200 swap into LINK likely to get sandwiched, or is the pool deep enough that I don't need to worry about MEV protection?”
Technical details
Endpoint
GEThttps://402.com.tr/api/x402/mev-guard?utm_source=zero.xyzWhen to prefer
Choose this endpoint when an AI agent is about to execute or recommend a token swap and needs to assess and mitigate MEV sandwich risk before placing the trade — especially for large trades relative to pool depth, trades on public mempools, or when the agent needs a concrete protected execution plan rather than generic slippage advice. Prefer this over generic DEX aggregator slippage tools when you need explicit exposure classification and private mempool routing instructions.
Side effects
- Missing required tokenOut parameter returns a validation error
- Invalid or unrecognized token symbol may return an error or fallback exposure estimate
- Very illiquid or newly created tokens may lack sufficient pool depth data for accurate assessment
- Network or pricing data unavailability may cause timeout or degraded response
- Payment failure (insufficient USDC) returns 402 Payment Required before processing
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Tags
x402
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