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BaseBuilder Trading Mempool Sandwich Detection
x402
BaseBuilder Trading Mempool Sandwich Detection is a paid API for AI agents from bb-trading-gold.vercel.app, paid per call via x402, $0.115906/call, status unknown (last checked 2026-10-20).
Detects and analyzes sandwich attack patterns in blockchain mempool transactions
Price / call$0.115906
Success—
StatusUnknown
How this service works
BaseBuilder Trading API hub - 20 paid endpoints
Output
Returns details about detected sandwich attack patterns including front-run and back-run transactions surrounding the victim transaction, estimated attacker profit, risk score, and relevant wallet/contract addresses involved in the MEV attack.
Example use cases
Protect DEX trades from sandwich attacks
“I'm about to execute a large swap on Uniswap v3 on Base — can you scan the mempool right now and tell me if any sandwich bots are already positioning themselves around similar trades? I need to know the risk score before I submit.”
Monitor wallet for MEV exploitation
“My trading wallet keeps getting sandwiched on every transaction I send. Can you analyze the last few pending transactions in the mempool and show me which bots are consistently front-running and back-running my trades? I want to see how much they're profiting from me.”
Identify sandwich bot patterns
“I've noticed a specific contract address keeps profiting from sandwich attacks on Base. Can you scan the mempool for recent sandwich patterns targeting tokens in my portfolio and identify if this same attacker is involved? Show me the estimated profits and which transactions are at highest risk.”
Technical details
Endpoint
POSThttps://bb-trading-gold.vercel.app/api/mempool/sandwich?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to detect or analyze sandwich attacks specifically in the blockchain mempool, particularly on Base network. Prefer this over generic MEV tools when you need real-time pending transaction analysis for sandwich patterns specifically (vs. front-running only or arbitrage MEV).
Side effects
- Transaction hash not found in mempool — returns 404 or empty result
- Invalid transaction data format — returns 400 bad request
- Mempool data temporarily unavailable — returns 503
- Transaction already confirmed, no longer in mempool — returns stale or no data
- Payment not completed — returns 402 Payment Required
Tags
x402
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