Roundhouse

Base Onchain Data

New trading pools created on Base in the last N minutes on Uniswap v4, Uniswap v3 or Aerodrome: both tokens with symbol, name and decimals, fee tier, v4 hooks, whether it pairs with ETH, WETH or USDC, and quote liquidity where readable. Unvetted: many new pools are spam.

TradingLiveeip155:8453Exactvia cdp
https://onchaincheck.dev/base/new-pools
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.
$0.010
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 06:53Z
—
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.

0.01USDC≈ $0.01 USD
on Base · exact scheme

Pay 0.01 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
10000 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x2ECB9E1fcca7A62758c679F11bC3241466d181d8",
    "amount": "10000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "queryParams": {
          "minutes": "60"
        }
      },
      "output": {
        "type": "json",
        "example": {
          "chain": "base",
          "count": 25,
          "notes": "New pools are unvetted: many are spam or scams. quoteLiquidity is the WETH/WPOL or USDC a v3 or Solidly-style pool held when read; null for Uniswap v4 (liquidity sits in the shared PoolManager) or whe… (240 chars, truncated in this example)",
          "pools": [
            {
              "tx": "0x466df85cdb1aecc2d46117e16ecec222aea21fa9fb7c3610cf3037dee9a44c66",
              "dex": "uniswap-v4",
              "block": 52948393,
              "hooks": "0xb429d62f8f3bFFb98CdB9569533eA23bF0Ba28CC",
              "poolId": "0x80517ba0559429bbb06412f368db24187b559c966ce9182292bca910018def08",
              "token0": {
                "name": "tacos",
                "symbol": "tacos",
                "address": "0x16A4A4A6f2e06581717eD86D87bc4B5D7E9D2B07",
                "decimals": 18
              },
              "token1": {
                "name": "Wrapped Ether",
                "symbol": "WETH",
                "address": "0x4200000000000000000000000000000000000006",
                "decimals": 18
              },
              "approxTime": "2026-10-22T16:22:13.000Z",
              "feeTierBps": 83886.08,
              "pairedWith": "WETH",
              "quoteLiquidity": null
            },
            {
              "tx": "0xa080bea5e48d52b1335168e6b57951aff2060bfaef3b45172e68b2dcb6f17c2f",
              "dex": "uniswap-v4",
              "block": 52948392,
              "hooks": null,
              "poolId": "0xa519e5a0b73b8814bd45c44c13c1c9652734fcd45ea1e1c2e150929b3430900b",
              "token0": {
                "name": "native ETH",
                "symbol": "ETH",
                "address": "0x0000000000000000000000000000000000000000",
                "decimals": 18
              },
              "token1": {
                "name": "Venice Token",
                "symbol": "VVV",
                "address": "0xa23B9142755Bf2Bcc59f1f01cbCFddb78Df6B966",
                "decimals": 18
              },
              "approxTime": "2026-10-22T16:22:11.000Z",
              "feeTierBps": 1,
              "pairedWith": "ETH",
              "quoteLiquidity": null
            },
            {
              "tx": "0xafd5001d42a1f7f8932180a515e511d884606c78ab470c373b793232642e188b",
              "dex": "uniswap-v4",
              "block": 52948378,
              "hooks": "0x0469a4Bd3724DC86C9542F4694c976DA13C450c0",
              "poolId": "0x9a8e443633b496a9b0a17bdc01bbaa9bb071ba74bd1820054d981f5eee43e3a8",
              "token0": {
                "name": "Zora",
                "symbol": "ZORA",
                "address": "0x1111111111166b7FE7bd91427724B487980aFc69",
                "decimals": 18
              },
              "token1": {
                "name": "usdce",
                "symbol": "usdce",
                "address": "0x9F6548660DA12ef99fB7703ceb6B8cB65d3F29c9",
                "decimals": 18
              },
              "approxTime": "2026-10-22T16:21:43.000Z",
              "feeTierBps": 83886.08,
              "pairedWith": null,
              "quoteLiquidity": null
            },
            {
              "tx": "0x815b6209d544d26ff3a31c35119df3e723313d73125297a58d7af481efdb3c26",
              "dex": "uniswap-v4",
              "block": 52948377,
              "hooks": "0x1ee986e27e0c822113aa882007A35BbEd41F68c0",
              "poolId": "0x2ff89f765b77fa848a7d04280df8e8ad984f6d05d8faf0a6386326508990c033",
              "token0": {
                "name": "mmETH",
                "symbol": "mmETH",
                "address": "0x4fc59c42653E052c7AB5C8381F839e2D70504131",
                "decimals": 18
              },
              "token1": {
                "name": "Across Protocol (ACX)",
                "symbol": "ACX",
                "address": "0x659Ab70F48C7e8d026458afDdA968a408837DDD3",
                "decimals": 18
              },
              "approxTime": "2026-10-22T16:21:41.000Z",
              "feeTierBps": 0,
              "pairedWith": null,
              "quoteLiquidity": null
            },
            {
              "tx": "0xc91d65d313311e2c1a94610ce532b663462ecf975fdc7a4d7697eb99c5f5af3b",
              "dex": "uniswap-v4",
              "block": 52948375,
              "hooks": "0x0469a4Bd3724DC86C9542F4694c976DA13C450c0",
              "poolId": "0x3d318c1110aacd993469c4fa632a46f7f00ba869171051ba405f7ba02fe2a829",
              "token0": {
                "name": "Wrapped Ether",
                "symbol": "WETH",
                "address": "0x4200000000000000000000000000000000000006",
                "decimals": 18
              },
              "token1": {
                "name": "Across Protocol (ACX)",
                "symbol": "ACX",
                "address": "0x659Ab70F48C7e8d026458afDdA968a408837DDD3",
                "decimals": 18
              },
              "approxTime": "2026-10-22T16:21:37.000Z",
              "feeTierBps": 83886.08,
              "pairedWith": "WETH",
              "quoteLiquidity": null
            }
          ],
          "window": {
            "minutes": 60,
            "toBlock": 52948393,
            "fromBlock": 52946593
          },
          "sources": [
            "uniswap-v4",
            "uniswap-v3",
            "aerodrome"
          ]
        }
      }
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "required": [
        "input"
      ],
      "properties": {
        "input": {
          "type": "object",
          "required": [
            "type",
            "method"
          ],
          "properties": {
            "type": {
              "type": "string",
              "const": "http"
            },
            "method": {
              "enum": [
                "GET"
              ],
              "type": "string"
            },
            "queryParams": {
              "type": "object",
              "required": [],
              "properties": {
                "limit": {
                  "type": "string",
                  "pattern": "^\\d{1,2}$",
                  "description": "Max pools listed, newest first, 1 to 50, default 25"
                },
                "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 06:53Z
Last indexed by Roundhouse
2026-10-26 17:20Z
Last enriched (probe, favicon, geo)
2026-10-24 07:16Z
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

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/new-pools, 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.