Base Onchain Data

Name: Base Onchain Data
Price: 0.02 USDC
Availability: InStock

Whale and large-trade tracker for an ERC-20 on Base: every buy and sell in the last N minutes on the token's deepest WETH/USDC pools (Uniswap v3 or Aerodrome), 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/base/trades

BaseOnchainerc20TokenWallet

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.

Calls · 30d

Upstream's own call count for this endpoint, not ours.

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": "0x4ed4E862860beD51a9570b96d89aF5E1B0Efefed",
          "minUsd": "100",
          "minutes": "60"
        }
      },
      "output": {
        "type": "json",
        "example": {
          "chain": "base",
          "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": "DEGEN",
            "address": "0x4ed4E862860beD51a9570b96d89aF5E1B0Efefed",
            "decimals": 18
          },
          "window": {
            "to": "2026-10-22T16:22:57.000Z",
            "from": "2026-10-22T15:22:57.000Z",
            "minutes": 60,
            "toBlock": 52948415,
            "fromBlock": 52946615
          },
          "summary": {
            "buys": 20,
            "sells": 1,
            "trades": 21,
            "netFlowUsd": 1223.35,
            "buyVolumeUsd": 1223.4,
            "sellVolumeUsd": 0.0558468,
            "largestTradeUsd": 142.466
          },
          "nativeUsd": 2396.4,
          "topBuyers": [
            {
              "netUsd": 471.2,
              "trades": 9,
              "wallet": "0x3dA47e29a82651171c57956A73F80b3905B8b230",
              "soldUsd": 0,
              "boughtUsd": 471.2
            },
            {
              "netUsd": 262.4,
              "trades": 2,
              "wallet": "0x2342110f3Af09c848C104fdE3E7261Dc0C5C4d7a",
              "soldUsd": 0,
              "boughtUsd": 262.4
            },
            {
              "netUsd": 239.6,
              "trades": 2,
              "wallet": "0x9CA5CAcb8CD8820415f7cA3C3C3cf7E23c885bd7",
              "soldUsd": 0,
              "boughtUsd": 239.6
            },
            {
              "netUsd": 142.3,
              "trades": 1,
              "wallet": "0x2c2e035D20Cd6da1664a7Cf0EAf98e3647607304",
              "soldUsd": 0,
              "boughtUsd": 142.3
            },
            {
              "netUsd": 67.59,
              "trades": 1,
              "wallet": "0x911E228d9105963b68af40880Ce8Dd6d5Ee8637E",
              "soldUsd": 0,
              "boughtUsd": 67.59
            }
          ],
          "topSellers": [
            {
              "netUsd": -0.05585,
              "trades": 1,
              "wallet": "0xbdBeBD58cC8153Ce74530BB342427579315915B2",
              "soldUsd": 0.05585,
              "boughtUsd": 0
            }
          ],
          "largeTrades": [
            {
              "tx": "0x2079d9a6e334ecfb885c7f0144002d59e1c9030f4e34cf9f4a54968d91f11e4f",
              "dex": "uniswap-v3",
              "usd": 142.466,
              "side": "buy",
              "block": 52946817,
              "wallet": "0x2342110f3Af09c848C104fdE3E7261Dc0C5C4d7a",
              "approxTime": "2026-10-22T15:29:41.000Z",
              "quoteAmount": 0.05945,
              "quoteSymbol": "WETH",
              "tokenAmount": 149873.49
            },
            {
              "tx": "0x63e5e82b77986e25689e4e68c61044c15c8f5431038b1bfdaf72aa499401464b",
              "dex": "uniswap-v3",
              "usd": 142.322,
              "side": "buy",
              "block": 52947027,
              "wallet": "0x2c2e035D20Cd6da1664a7Cf0EAf98e3647607304",
              "approxTime": "2026-10-22T15:36:41.000Z",
              "quoteAmount": 0.05939,
              "quoteSymbol": "WETH",
              "tokenAmount": 149535.86
            },
            {
              "tx": "0x8b75da4612b49b617aa6f50ab419bbd80586557811e194b4ef74cc72a82c31da",
              "dex": "uniswap-v3",
              "usd": 119.964,
              "side": "buy",
              "block": 52946821,
              "wallet": "0x2342110f3Af09c848C104fdE3E7261Dc0C5C4d7a",
              "approxTime": "2026-10-22T15:29:49.000Z",
              "quoteAmount": 0.05006,
              "quoteSymbol": "WETH",
              "tokenAmount": 126158.12
            },
            {
              "tx": "0xdb03281dd3142dd5d095abc85539f60e32d9d424b56b601aca376ecd6563aeb5",
              "dex": "uniswap-v3",
              "usd": 119.82,
              "side": "buy",
              "block": 52947027,
              "wallet": "0x9CA5CAcb8CD8820415f7cA3C3C3cf7E23c885bd7",
              "approxTime": "2026-10-22T15:36:41.000Z",
              "quoteAmount": 0.05,
              "quoteSymbol": "WETH",
              "tokenAmount": 125923.21
            },
            {
              "tx": "0x54f59ce65722caa69d4d2c76254739354b3bbe109bb22fca6833370fff839065",
              "dex": "uniswap-v3",
              "usd": 119.82,
              "side": "buy",
              "block": 52947027,
              "wallet": "0x9CA5CAcb8CD8820415f7cA3C3C3cf7E23c885bd7",
              "approxTime": "2026-10-22T15:36:41.000Z",
              "quoteAmount": 0.05,
              "quoteSymbol": "WETH",
              "tokenAmount": 125863.06
            }
          ],
          "poolsScanned": [
            {
              "dex": "uniswap-v3",
              "pool": "0xc9034c3E7F58003E6ae0C8438e7c8f4598d5ACAA",
              "pairedWith": "WETH"
            },
            {
              "dex": "uniswap-v3",
              "pool": "0x0cA6485b7e9cF814A3Fd09d81672B07323535b64",
              "pairedWith": "WETH"
            },
            {
              "dex": "aerodrome",
              "pool": "0x2C4909355b0C036840819484c3A882A95659aBf3",
              "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}$",
                  "description": "Token contract address on Base"
                },
                "minUsd": {
                  "type": "string",
                  "pattern": "^\\d+(\\.\\d+)?$",
                  "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 17:20Z
Last enriched (probe, favicon, geo): 2026-10-24 07:15Z
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 Base 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=Base%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/base/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.