Roundhouse

Ethereum Onchain Data

Whale and large-trade tracker for an ERC-20 on Ethereum: every buy and sell in the last N minutes on the token's deepest WETH/USDC pools (Uniswap v3), with USD size, side, wallet and transaction for the largest trades, buy/sell volume and net flow, and the wallets that bought or sold the most.

TradingLiveeip155:8453Exactvia cdp
https://ca-tax-api-mainnet.lxtap.workers.dev/eth/trades
EthereumOnchainerc20TokenWallet
Calls · 30d
1
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 4 snapshots so far.
$2.05
Verified settled volume
276 settlements proven x402 by their on-chain EIP-3009 marker.
$0.020
Listed price
As published in the catalog. Always read the live 402 before paying.
1
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-10-22 21:56Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x2ECB9E1fcca7A62758c679F11bC3241466d181d8

The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.

Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Provider

The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.

Accepts

The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.

0.02USDC≈ $0.02 USD
on Base · exact scheme

Pay 0.02 USDC on Base to 0x2ECB…181d8. The signed payment is good for 5 minutes.

Paid to
0x2ECB…181d8
USD Coin contract
0x8335…02913
Payment window
5 minutes
As published
20000 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x2ECB9E1fcca7A62758c679F11bC3241466d181d8",
    "amount": "20000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "queryParams": {
          "token": "0x1f9840a85d5aF5bf1D1762F925BDADdC4201F984",
          "minUsd": "100",
          "minutes": "60"
        }
      },
      "output": {
        "type": "json",
        "example": {
          "chain": "eth",
          "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": "UNI",
            "address": "0x1f9840a85d5aF5bf1D1762F925BDADdC4201F984",
            "decimals": 18
          },
          "window": {
            "to": "2026-10-22T16:22:59.000Z",
            "from": "2026-10-22T15:22:59.000Z",
            "minutes": 60,
            "toBlock": 26249326,
            "fromBlock": 26249026
          },
          "summary": {
            "buys": 7,
            "sells": 22,
            "trades": 29,
            "netFlowUsd": -62919.8,
            "buyVolumeUsd": 775.696,
            "sellVolumeUsd": 63695.5,
            "largestTradeUsd": 12127.7
          },
          "nativeUsd": 2399.99,
          "topBuyers": [
            {
              "netUsd": 333.4,
              "trades": 1,
              "wallet": "0xFE272453cdBE33969155E54F5EAa9267bEEaa496",
              "soldUsd": 0,
              "boughtUsd": 333.4
            },
            {
              "netUsd": 192.4,
              "trades": 1,
              "wallet": "0xF2448FF6E5E68a8Ef70B62d9f7dfE3C43253A1F5",
              "soldUsd": 0,
              "boughtUsd": 192.4
            },
            {
              "netUsd": 98,
              "trades": 1,
              "wallet": "0x124Ae9d407c6644688F6A667D6a205f26AC36b30",
              "soldUsd": 0,
              "boughtUsd": 98
            },
            {
              "netUsd": 88.86,
              "trades": 1,
              "wallet": "0x5f73CfaCb6e225266946feE476A8b20902154565",
              "soldUsd": 0,
              "boughtUsd": 88.86
            },
            {
              "netUsd": 41.09,
              "trades": 1,
              "wallet": "0x544B0538C070C9B0872A1C34e124F088a3865aF3",
              "soldUsd": 0,
              "boughtUsd": 41.09
            }
          ],
          "topSellers": [
            {
              "netUsd": -14380,
              "trades": 5,
              "wallet": "0x5B43453FCE04b92E190f391a83136bfBeCEDEFd1",
              "soldUsd": 14380,
              "boughtUsd": 0
            },
            {
              "netUsd": -12130,
              "trades": 1,
              "wallet": "0xd5a809D6dbEe62A34Cf4106080C6e04B8d9ce285",
              "soldUsd": 12130,
              "boughtUsd": 0
            },
            {
              "netUsd": -8849,
              "trades": 1,
              "wallet": "0x8357eFA84F91013Bd6b285eF0f6b93C211cC3d9d",
              "soldUsd": 8849,
              "boughtUsd": 0
            },
            {
              "netUsd": -7432,
              "trades": 1,
              "wallet": "0x05a94A8Dd7eb1ba5b1114CC5eF18855A221Ac317",
              "soldUsd": 7432,
              "boughtUsd": 0
            },
            {
              "netUsd": -5504,
              "trades": 1,
              "wallet": "0x8bBe5D78bE45931Cf4815D8A00bf38c3DDD36782",
              "soldUsd": 5504,
              "boughtUsd": 0
            }
          ],
          "largeTrades": [
            {
              "tx": "0x254948fa1fc779edf4268e84b804fffefe7dd32db455779c54ad78f349b7b0cd",
              "dex": "uniswap-v3",
              "usd": 12127.7,
              "side": "sell",
              "block": 26249063,
              "wallet": "0xd5a809D6dbEe62A34Cf4106080C6e04B8d9ce285",
              "approxTime": "2026-10-22T15:30:23.000Z",
              "quoteAmount": 5.0532446,
              "quoteSymbol": "WETH",
              "tokenAmount": 1716.8438
            },
            {
              "tx": "0xdb57be14caada6f93d3342bdaf96bf15eb30f17bdadfe2aa5f2caf356f61d3fa",
              "dex": "uniswap-v3",
              "usd": 8849.27,
              "side": "sell",
              "block": 26249269,
              "wallet": "0x8357eFA84F91013Bd6b285eF0f6b93C211cC3d9d",
              "approxTime": "2026-10-22T16:11:35.000Z",
              "quoteAmount": 3.6872074,
              "quoteSymbol": "WETH",
              "tokenAmount": 1255.6263
            },
            {
              "tx": "0x8cc47225f61cc51a395adefc1ab74ff5a304f2d65a9cbed34524aba228010564",
              "dex": "uniswap-v3",
              "usd": 7431.89,
              "side": "sell",
              "block": 26249322,
              "wallet": "0x05a94A8Dd7eb1ba5b1114CC5eF18855A221Ac317",
              "approxTime": "2026-10-22T16:22:11.000Z",
              "quoteAmount": 3.0966311,
              "quoteSymbol": "WETH",
              "tokenAmount": 1056.3754
            },
            {
              "tx": "0xf087fc7262fd6a0902d311486ebd012b8bbf40711da818d3cf9f83e37f2a8aca",
              "dex": "uniswap-v3",
              "usd": 6281.59,
              "side": "sell",
              "block": 26249066,
              "wallet": "0x5B43453FCE04b92E190f391a83136bfBeCEDEFd1",
              "approxTime": "2026-10-22T15:30:59.000Z",
              "quoteAmount": 2.6173378,
              "quoteSymbol": "WETH",
              "tokenAmount": 889.86901
            },
            {
              "tx": "0x41df3a253d1d138fac757efa1cabb7ae3f16f2ff715273513436258f438b98ee",
              "dex": "uniswap-v3",
              "usd": 5503.92,
              "side": "sell",
              "block": 26249291,
              "wallet": "0x8bBe5D78bE45931Cf4815D8A00bf38c3DDD36782",
              "approxTime": "2026-10-22T16:15:59.000Z",
              "quoteAmount": 2.2933067,
              "quoteSymbol": "WETH",
              "tokenAmount": 781.38876
            }
          ],
          "poolsScanned": [
            {
              "dex": "uniswap-v3",
              "pool": "0x1d42064Fc4Beb5F8aAF85F4617AE8b3b5B8Bd801",
              "pairedWith": "WETH"
            },
            {
              "dex": "uniswap-v3",
              "pool": "0xfaA318479b7755b2dBfDD34dC306cb28B420Ad12",
              "pairedWith": "WETH"
            },
            {
              "dex": "uniswap-v3",
              "pool": "0x360b9726186C0F62cc719450685ce70280774Dc8",
              "pairedWith": "WETH"
            }
          ]
        }
      }
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "required": [
        "input"
      ],
      "properties": {
        "input": {
          "type": "object",
          "required": [
            "type",
            "method"
          ],
          "properties": {
            "type": {
              "type": "string",
              "const": "http"
            },
            "method": {
              "enum": [
                "GET"
              ],
              "type": "string"
            },
            "queryParams": {
              "type": "object",
              "required": [
                "token"
              ],
              "properties": {
                "limit": {
                  "type": "string",
                  "pattern": "^\\d{1,2}$",
                  "description": "Max trades listed, 1 to 40, default 20"
                },
                "token": {
                  "type": "string",
                  "pattern": "^0x[0-9a-fA-F]{40}$",
                  "description": "Token contract address on Ethereum"
                },
                "minUsd": {
                  "type": "string",
                  "pattern": "^\\d+(\\.\\d+)?$",
                  "description": "Only list trades at least this large in USD, default 1000"
                },
                "minutes": {
                  "type": "string",
                  "pattern": "^\\d{1,3}$",
                  "description": "Look-back window in minutes; 5 to 240, default 60 (capped at 12,000 blocks, about 50 minutes on Arbitrum)"
                }
              },
              "additionalProperties": false
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object"
            }
          }
        }
      }
    }
  }
}

Provenance

Seen in the source catalog
2026-10-22 21:56Z
Last indexed by Roundhouse
2026-10-26 17:30Z
Last enriched (probe, favicon, geo)
2026-10-22 23:16Z
x402 version
2
Max timeout
300s
Liveness probe
HTTP 402
Report

Hand this page to an agent

Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.

GET api.roundhouseai.io/v0/endpoints

This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 4 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.

Open skill.md
Show the prompt
Using Roundhouse, look up the x402 service Ethereum Onchain Data and tell me whether it is
worth paying: what a call costs, whether the endpoint answered when last probed, and what
its payment record actually shows.

curl -s 'https://api.roundhouseai.io/v0/endpoints?q=Ethereum%20Onchain%20Data'
curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>'

Then call it: read the price from the live 402 at https://ca-tax-api-mainnet.lxtap.workers.dev/eth/trades, never from
a cached figure, and pay with an x402 client.

The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except
/v0/unified* and /v0/endpoints. Either pay over x402 (mint a personal key for $0.01 at
GET https://api.roundhouseai.io/v0/test/x402), or ask me for an organization key, which I create at
https://roundhouseai.io/dashboard/connections. If you have neither, ask before going further.

If you do not have Roundhouse tools or skills installed, read
https://roundhouseai.io/skill.md first — it is the whole procedure.