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TrollBridge Whale Watch — Ethereum Mempool Large Transaction Monitor
x402
TrollBridge Whale Watch — Ethereum Mempool Large Transaction Monitor is a paid API for AI agents from mini-tollbooth.onrender.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-10-11).
Returns the largest-value unconfirmed Ethereum transactions currently in the mempool, ranked by native ETH value
Price / call$0.05
Success—
StatusUnknown
How this service works
The insurance booth for AI agents, with Mini's Agent Supply Store on the side of the road. One hundred checkpoints: pre-transaction safety lanes (honeypot, approval-risk, rug-score, receipt-check, tx-dryrun, permit-scan, airdrop-verdict, deployer-history, wallet-watch, secret-scan at $0.02 USDC per call; the protection tier — /contract-check, /approval-screen, /tx-plain-english, /honeypot-check, /tx-simulate, /redteam, /skill-scan, /verdict, /egress-audit, /tool-gate, /airlock, /repo-scan, /prove, /task-scope — at $0.10; the one-call /shield don't-get-rugged screen at $0.25; the full /preflight bundle at $0.05), bounty intel (bounties, fresh, verdicts, deadlines, sweepstakes, opportunities) at $0.02 USDC per call, trader intel (/prices and /quant at $0.02; /enrich and /token-check at $0.05; /contract-check and /honeypot-check at $0.10; /sec-facts at $0.05), market intel (/markets and /search at $0.05; /grants at $0.02), DeFi intel (/yields and /new-pairs at $0.05; /gas and /defi at $0.02), AI intel (/models at $0.02), agent-ops intel (/prompt-cost, /model-picks, /rpc-speed, /terms-tldr, /scrape, /gigs, /retry-verify, /idempotency, /verify-independent at $0.02; /site-watch, /wallet-check, /code-run, /regulatory-pack, /sage, /cron-watch, /caveat-check, /tripwire, /escrow, /trust, /bridge-fees, /dao-votes, /dev-activity, /dex-arb, /dydx-perps, /funding-rates, /gas-predict, /hack-tracker, /long-short-ratio, /lp-yields, /mev-scan, /open-interest, /perp-basis, /polymarket-odds, /rwa-watch, /sentiment, /stablecoin-flows, /tokenomics, /top-movers, /whale-watch, and /yield-stable at $0.05; /approval-screen, /tx-plain-english, /tx-simulate, and /task-scope at $0.10; /scam-scan deep scan at $5.00 or 30-day subscription at $30.00), supply store (/road-pack combo meal at $0.05; curated datasets, the /audit-prep pre-audit review, and the /prove-state symbolic-execution run at $1.00; the /audit AI-agent audit at $25.00). Every lane answers before money moves — heuristic verdicts, not audits. Don't get rugged.
Output
Returns a JSON object with the chain name, count, data source attribution, and an array of whale transactions each containing: transaction hash, sender address, recipient address, unconfirmed status, timestamp first seen, native ETH value, and gas price in gwei. Note: USD pricing is not included since Blockchair does not price mempool transactions.
Example use cases
Real-time whale movement alerting
“Show me the 10 biggest pending ETH transactions in the Ethereum mempool right now — I want to see if any whales are making large moves before the next block confirms.”
Pre-trade market sentiment check
“Before I make a big ETH trade, can you check the Ethereum mempool for the largest unconfirmed transactions? I want to know if there's unusual whale activity that might move the market.”
DeFi protocol inflow monitoring
“Fetch up to 50 of the largest unconfirmed Ethereum transactions in the mempool so I can check whether any big deposits are headed toward major DeFi protocols.”
Technical details
Endpoint
GEThttps://mini-tollbooth.onrender.com/whale-watch?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need real-time visibility into the largest pending Ethereum transactions before they are confirmed — ideal for whale tracking, market sentiment analysis, or front-running detection. Unlike confirmed-block explorers, this gives mempool-level insight. Note it covers native ETH value only and does not include ERC-20 token transfers or USD pricing.
Side effects
- Chain parameter set to something other than 'ethereum' — only Ethereum mempool is supported
- Limit out of range (must be 1-50) — may return error or default
- Mempool temporarily empty or sparse — returns fewer results than requested
- Blockchair upstream outage — endpoint may return error or stale data
- Payment failure (insufficient USDC balance) — x402 payment required at $0.05 per call
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"lane": "/whale-watch",
"note": "Largest-value unconfirmed transactions by native ETH value. Values are native only — Blockchair does not USD-price mempool txs.",
"chain": "ethereum",
"count": 2,
"source": "blockchair mempool (keyless)",
"whales": [
{
"hash": "0x72ca5782bfd64ae7…",
"sender": "0xf5dcc621a3dc…",
"status": "unconfirmed",
"seen_at": "2026-10-07 00:30:40",
"recipient": "0xdac17f958d2e…",
"value_eth": 0,
"gas_price_gwei": 0.166176893
}
],
"description": "Whale movements ($0.05) — largest-value unconfirmed Ethereum mempool transactions, ranked by native ETH value"
}
}Tags
x402
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