Roundhouse

Arbitrum One Onchain Data

Whale and large-trade tracker for an ERC-20 on Arbitrum One: 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://onchaincheck.dev/arbitrum/trades
ArbitrumOnchainerc20TokenWallet
Settlements · 30d
276
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days.
$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.
2
Calls · 30d
Upstream's own call count for this endpoint, not ours.
2
Unique payers · 30d
Last called 2026-10-24 17:16Z
—
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": "0x912CE59144191C1204E64559FE8253a0e49E6548",
          "minUsd": "100",
          "minutes": "60"
        }
      },
      "output": {
        "type": "json",
        "example": {
          "chain": "arbitrum",
          "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": "ARB",
            "address": "0x912CE59144191C1204E64559FE8253a0e49E6548",
            "decimals": 18
          },
          "window": {
            "to": "2026-10-22T16:23:07.000Z",
            "from": "2026-10-22T15:33:07.000Z",
            "minutes": 50,
            "toBlock": 517276399,
            "fromBlock": 517264399,
            "requestedMinutes": 60
          },
          "summary": {
            "buys": 298,
            "sells": 351,
            "trades": 649,
            "netFlowUsd": -2782.27,
            "buyVolumeUsd": 104130,
            "sellVolumeUsd": 106912,
            "largestTradeUsd": 3245.8
          },
          "nativeUsd": 2394.13,
          "topBuyers": [
            {
              "netUsd": 3246,
              "trades": 1,
              "wallet": "0xD118aa7a1545886e3E47FF57cF3694263d42E1d8",
              "soldUsd": 0,
              "boughtUsd": 3246
            },
            {
              "netUsd": 2240,
              "trades": 1,
              "wallet": "0x934150D353F5E53Cb6E9178456067B545a443a5D",
              "soldUsd": 0,
              "boughtUsd": 2240
            },
            {
              "netUsd": 1894,
              "trades": 1,
              "wallet": "0x4656E7359E37e33333BaA1f6d0c32D51F9ee22Cc",
              "soldUsd": 0,
              "boughtUsd": 1894
            },
            {
              "netUsd": 1652,
              "trades": 1,
              "wallet": "0xf78B2eDA7c1E20fF9906B31FE3612195BCe9D6Ce",
              "soldUsd": 0,
              "boughtUsd": 1652
            },
            {
              "netUsd": 1537,
              "trades": 1,
              "wallet": "0xEA767dB0da257a5538d7f245524a480b410aA491",
              "soldUsd": 0,
              "boughtUsd": 1537
            }
          ],
          "topSellers": [
            {
              "netUsd": -3516,
              "trades": 2,
              "wallet": "0x000FBd1e05e3b6A2465b25E5A1E682CEeda45934",
              "soldUsd": 3516,
              "boughtUsd": 0
            },
            {
              "netUsd": -2957,
              "trades": 2,
              "wallet": "0x975227fcCc2e9622C337b154Fbca1F610F8B980b",
              "soldUsd": 2957,
              "boughtUsd": 0
            },
            {
              "netUsd": -2362,
              "trades": 2,
              "wallet": "0xad2215C56Ce6a60866269d585fD7d18Ba54C6AA9",
              "soldUsd": 2362,
              "boughtUsd": 0
            },
            {
              "netUsd": -1892,
              "trades": 2,
              "wallet": "0x69F63B74597bB2B26D2CA90B30650deB9c5B3D5B",
              "soldUsd": 1892,
              "boughtUsd": 0
            },
            {
              "netUsd": -1571,
              "trades": 1,
              "wallet": "0xFD0CcF8DD9c88787305D8048969D7B7000391304",
              "soldUsd": 1571,
              "boughtUsd": 0
            }
          ],
          "largeTrades": [
            {
              "tx": "0xdd7ab46328268cad057eb9877b5a913b0ac7041b9e9fd40c109aaf98a511744e",
              "dex": "uniswap-v3",
              "usd": 3245.8,
              "side": "buy",
              "block": 517270026,
              "wallet": "0xD118aa7a1545886e3E47FF57cF3694263d42E1d8",
              "approxTime": "2026-10-22T15:56:33.750Z",
              "quoteAmount": 1.3557356,
              "quoteSymbol": "WETH",
              "tokenAmount": 17675.134
            },
            {
              "tx": "0xc8fb9b36243fb0c3dd0a254ed60cfffaaa57570e651a82a4bb8a8d6ff0bed29f",
              "dex": "uniswap-v3",
              "usd": 2239.9,
              "side": "buy",
              "block": 517273607,
              "wallet": "0x934150D353F5E53Cb6E9178456067B545a443a5D",
              "approxTime": "2026-10-22T16:11:29.000Z",
              "quoteAmount": 0.93557852,
              "quoteSymbol": "WETH",
              "tokenAmount": 12184.637
            },
            {
              "tx": "0x34160401c625b9d553185ccea3847327259647b2dc85a6ba5523d53a70b1944f",
              "dex": "uniswap-v3",
              "usd": 2055.43,
              "side": "sell",
              "block": 517273864,
              "wallet": "0x000FBd1e05e3b6A2465b25E5A1E682CEeda45934",
              "approxTime": "2026-10-22T16:12:33.250Z",
              "quoteAmount": 0.85853013,
              "quoteSymbol": "WETH",
              "tokenAmount": 11206.06
            },
            {
              "tx": "0x9f65289997195815cb9e8e1f4a95e59c5d555789f7141bbe52c8eeb5bc50f491",
              "dex": "uniswap-v3",
              "usd": 1894.39,
              "side": "buy",
              "block": 517269969,
              "wallet": "0x4656E7359E37e33333BaA1f6d0c32D51F9ee22Cc",
              "approxTime": "2026-10-22T15:56:19.500Z",
              "quoteAmount": 0.79126671,
              "quoteSymbol": "WETH",
              "tokenAmount": 10325.681
            },
            {
              "tx": "0xcf7fc922dd3c6950024d0a967fb4b3a54fe71a58dec6dbe753f4d151ec90005f",
              "dex": "uniswap-v3",
              "usd": 1651.54,
              "side": "buy",
              "block": 517273309,
              "wallet": "0xf78B2eDA7c1E20fF9906B31FE3612195BCe9D6Ce",
              "approxTime": "2026-10-22T16:10:14.500Z",
              "quoteAmount": 0.68982808,
              "quoteSymbol": "WETH",
              "tokenAmount": 8990.0004
            }
          ],
          "poolsScanned": [
            {
              "dex": "uniswap-v3",
              "pool": "0xC6F780497A95e246EB9449f5e4770916DCd6396A",
              "pairedWith": "WETH"
            },
            {
              "dex": "uniswap-v3",
              "pool": "0xaEBDcA1Bc8d89177EbE2308d62af5e74885DcCc3",
              "pairedWith": "USDC"
            },
            {
              "dex": "uniswap-v3",
              "pool": "0x92c63d0e701CAAe670C9415d91C474F686298f00",
              "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}$",
                  "description": "Token contract address on Arbitrum One"
                },
                "minUsd": {
                  "type": "string",
                  "pattern": "^\\d+(\\.\\d+)?$",
                  "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
2026-10-24 17:16Z
Last indexed by Roundhouse
2026-10-26 14:50Z
Last enriched (probe, favicon, geo)
2026-10-24 07:46Z
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

No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days. 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 Arbitrum One 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=Arbitrum%20One%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://onchaincheck.dev/arbitrum/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.