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OP Mainnet ERC-20 Whale & Large-Trade Tracker
x402
OP Mainnet ERC-20 Whale & Large-Trade Tracker is a paid API for AI agents from ca-tax-api-mainnet.lxtap.workers.dev, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-23).
Returns every significant buy and sell of an ERC-20 token on OP Mainnet's deepest WETH/USDC pools over a configurable look-back window, with USD size, wallet, transaction, volume totals, net flow, and top buyers/sellers.
Price / call$0.02
Success—
StatusUnknown
How this service works
Pay-per-call data for AI agents, paid in USDC on Base with x402: token risk checks (rug check) on Base, Ethereum, Arbitrum, Optimism, Polygon and Solana, onchain reads (balances, transactions, gas, contracts, NFTs, whale trades, new pools, ENS and Basenames), ECB exchange rates, and Canadian sales tax and business days.
Output
A structured response listing individual large trades (buy or sell side, USD value, wallet address, transaction hash, pool used), aggregate buy and sell volume in USD, net flow (buy minus sell), and ranked lists of the wallets that bought or sold the most within the requested time window.
Example use cases
Spot whale accumulation before a pump
“For the OP Mainnet token at 0x9560e827af36c94d2ac33a39bce1fe78631088db, show me trades over $5,000 in the last 2 hours — who are the top buyers and what's the net flow looking like?”
Post-listing trade monitoring
“I just listed a new token on Velodrome — can you pull all trades for contract 0xda10009cbd5d07dd0cecc66161fc93d7c9000da1 on OP Mainnet over the last 30 minutes so I can see who's trading it and how big the buys are?”
Detect suspicious sell-off activity
“Check the last 60 minutes of trading for 0x7f5c764cbc14f9669b88837ca1490cca17c31607 on Optimism — show me the largest sells, which wallets are dumping, and whether sell volume is outpacing buys.”
Technical details
Endpoint
GEThttps://ca-tax-api-mainnet.lxtap.workers.dev/optimism/trades?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need real-time or near-real-time whale and large-trade intelligence specifically for an ERC-20 token on OP Mainnet. It is purpose-built for Optimism's Uniswap v3 and Velodrome pools and returns both raw trade-level detail and aggregated volume/flow metrics in a single call, making it ideal for trading bots, market-monitoring agents, and due-diligence workflows that need to assess buying pressure or detect coordinated accumulation/dumping without querying a general-purpose indexer.
Side effects
- Invalid or non-ERC-20 token address returns an error or empty result
- Token has no WETH/USDC pool on Uniswap v3 or Velodrome, yielding no trades
- minutes parameter outside 5–240 range may be rejected or clamped
- minUsd too high filters out all trades, returning an empty list
- Network congestion or RPC issues on OP Mainnet may cause timeouts
- limit parameter outside 1–40 range is rejected by schema validation
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"chain": "optimism",
"notes": "Trades from the 3 deepest WETH/USDC pools; other pairs and aggregator-internal routes are not counted. Wallets are transaction senders, looked up for the 40 largest trades.",
"token": {
"symbol": "OP",
"address": "0x4200000000000000000000000000000000000042",
"decimals": 18
},
"window": {
"to": "2026-10-22T16:23:21.000Z",
"from": "2026-10-22T15:23:21.000Z",
"minutes": 60,
"toBlock": 158543712,
"fromBlock": 158541912
},
"summary": {
"buys": 31,
"sells": 10,
"trades": 41,
"netFlowUsd": 963.893,
"buyVolumeUsd": 1464.88,
"sellVolumeUsd": 500.992,
"largestTradeUsd": 136.298
},
"nativeUsd": 2392.72,
"topBuyers": [
{
"netUsd": 654.5,
"trades": 6,
"wallet": "0xF104e69537346E54BCbDB5a1280aE3Aeef092c5B",
"soldUsd": 0,
"boughtUsd": 654.5
},
{
"netUsd": 164.6,
"trades": 8,
"wallet": "0x78126dAC3a2C08479d2196741Da77F56Ca8CFB88",
"soldUsd": 29.98,
"boughtUsd": 194.5
},
{
"netUsd": 152.4,
"trades": 6,
"wallet": "0x042f093b5D3e35C3cFa891E461f165e2BDF3A4BC",
"soldUsd": 49.23,
"boughtUsd": 201.7
},
{
"netUsd": 125.8,
"trades": 1,
"wallet": "0x092772CdEF109fEd26052E79B952Ac5404f1Ed21",
"soldUsd": 0,
"boughtUsd": 125.8
},
{
"netUsd": 21.35,
"trades": 1,
"wallet": "0xf4c2BAA132722670CC0Eb89C8a9329eE8F2389ED",
"soldUsd": 0,
"boughtUsd": 21.35
}
],
"topSellers": [
{
"netUsd": -232.5,
"trades": 2,
"wallet": "0x31074ff71CE53897194028316A355F98F2043D88",
"soldUsd": 232.5,
"boughtUsd": 0
},
{
"netUsd": -9.994,
"trades": 1,
"wallet": "0x6663F9524b76B547F1070E82ddE1Cc0A2236d758",
"soldUsd": 9.994,
"boughtUsd": 0
}
],
"largeTrades": [
{
"tx": "0x3abbe44d8a518056071465655f99749236a6038dc9bd74d13908020a2d916f08",
"dex": "uniswap-v3",
"usd": 136.298,
"side": "sell",
"block": 158542191,
"wallet": "0x31074ff71CE53897194028316A355F98F2043D88",
"approxTime": "2026-10-22T15:32:39.000Z",
"quoteAmount": 0.056963409,
"quoteSymbol": "WETH",
"tokenAmount": 1146.4553
},
{
"tx": "0x2f24b77a43957031dc2920de3d7053e2982c0e7d6f4dbac01ee987bdaeca0e97",
"dex": "uniswap-v3",
"usd": 125.834,
"side": "buy",
"block": 158542384,
"wallet": "0x092772CdEF109fEd26052E79B952Ac5404f1Ed21",
"approxTime": "2026-10-22T15:39:05.000Z",
"quoteAmount": 0.052590179,
"quoteSymbol": "WETH",
"tokenAmount": 1051.44
},
{
"tx": "0xd2e4ef821f04a1ccdde0e63b134ea69a36b846025b544f0903a736911d6af6a0",
"dex": "uniswap-v3",
"usd": 120.034,
"side": "buy",
"block": 158542226,
"wallet": "0xF104e69537346E54BCbDB5a1280aE3Aeef092c5B",
"approxTime": "2026-10-22T15:33:49.000Z",
"quoteAmount": 0.050166382,
"quoteSymbol": "WETH",
"tokenAmount": 1003.3283
},
{
"tx": "0x75489fd0b28be01ba509303315fbad4df8a447c0bbcde4e2d15641f5b7458f49",
"dex": "uniswap-v3",
"usd": 119.403,
"side": "buy",
"block": 158542217,
"wallet": "0xF104e69537346E54BCbDB5a1280aE3Aeef092c5B",
"approxTime": "2026-10-22T15:33:31.000Z",
"quoteAmount": 0.049902608,
"quoteSymbol": "WETH",
"tokenAmount": 998.35308
},
{
"tx": "0x5b717b635a7e6d7bfa095ed872b8a597a6feb87b176db2e8e32d3c5ae045dd1a",
"dex": "uniswap-v3",
"usd": 113.131,
"side": "buy",
"block": 158543036,
"wallet": "0xF104e69537346E54BCbDB5a1280aE3Aeef092c5B",
"approxTime": "2026-10-22T16:00:49.000Z",
"quoteAmount": 0.047281406,
"quoteSymbol": "WETH",
"tokenAmount": 944.27912
}
],
"poolsScanned": [
{
"dex": "uniswap-v3",
"pool": "0x68F5C0A2DE713a54991E01858Fd27a3832401849",
"pairedWith": "WETH"
},
{
"dex": "velodrome",
"pool": "0xd25711EdfBf747efCE181442Cc1D8F5F8fc8a0D3",
"pairedWith": "WETH"
},
{
"dex": "uniswap-v3",
"pool": "0xB533c12fB4e7b53b5524EAb9b47d93fF6C7A456F",
"pairedWith": "USDC"
}
]
}
}Tags
x402
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