Roundhouse

whale.hugen.tokyo

Recent large ETH transfers with sender/receiver labels and entity classification. AI agent API for whale movement detection and flow analysis

OtherLiveeip155:8453Exactvia cdp
https://whale.hugen.tokyo/whale/movements
Calls · 30d
1↓ 53%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 30 snapshots so far.
$74.38
Verified settled volume
Settlement count unavailable — the ledger could not be read.
$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 2026-08-30 15:48Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x29322Ea7EcB34aA6164cb2ddeB9CE650902E4f60

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.

Live 402 challenge

Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.

{
  "count": 1,
  "_notice": "Payment required ($0.02 USDC on Base). Sample response below.",
  "min_eth": 100,
  "movements": [
    {
      "to": {
        "label": "Unknown",
        "entity": null,
        "address": "0x742d..."
      },
      "from": {
        "label": "Binance 14",
        "entity": "Binance",
        "address": "0x28c6..."
      },
      "hash": "0xdef...",
      "type": "outflow",
      "asset": "ETH",
      "value_eth": 10000
    }
  ],
  "_alternatives": {
    "mcp": {
      "url": "https://mcp.hugen.tokyo/mcp",
      "info": "Access this and 2300+ x402 APIs via MCP"
    },
    "sdk": {
      "info": "pip install x402-pay",
      "usage": "import x402_pay; r = x402_pay.get('https://whale.hugen.tokyo/whale/lookup?address=0x28c6c06298d514db089934071355e5743bf21d60')"
    },
    "defi": {
      "info": "Token security audit — detect honeypots, rug pulls, hidden taxes before trading ($0.01)",
      "example": "https://defi.hugen.tokyo/defi/token?chain=1&address=0xdac17f958d2ee523a2206206994597c13d831ec7"
    },
    "intel": {
      "url": "https://intel.hugen.tokyo/llms.txt",
      "info": "Full crypto intelligence — risk scoring, due diligence, recommendations ($0.50/call)"
    }
  }
}

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 0x2932…E4f60. The signed payment is good for 5 minutes.

Paid to
0x2932…E4f60
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": "0x29322Ea7EcB34aA6164cb2ddeB9CE650902E4f60",
    "amount": "20000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "queryParams": {
          "hours": "24",
          "min_eth": "100"
        }
      },
      "output": {
        "type": "json",
        "example": {
          "count": 1,
          "movements": [
            {
              "to": {
                "label": "Unknown"
              },
              "from": {
                "label": "Binance"
              },
              "value_eth": 10000
            }
          ]
        }
      }
    },
    "tags": [
      "whale",
      "ethereum",
      "transfers",
      "smart-money"
    ],
    "schema": {
      "properties": {
        "input": {
          "required": [
            "method"
          ]
        }
      }
    },
    "category": "blockchain-analytics",
    "discoverable": true
  }
}

Provenance

Seen in the source catalog
2026-08-30 15:48Z
Last indexed by Roundhouse
2026-09-24 10:30Z
Last enriched (probe, favicon, geo)
2026-09-14 07:45Z
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. 30 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 whale.hugen.tokyo 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=whale.hugen.tokyo'
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://whale.hugen.tokyo/whale/movements, 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. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402,
or use an organization key from https://roundhouseai.io/dashboard/team.

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