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whale.hugen.tokyo Ethereum Address Label Lookup
x402
whale.hugen.tokyo Ethereum Address Label Lookup is a paid API for AI agents from whale.hugen.tokyo, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).
Resolves an Ethereum address to its entity label, name tag, and category from a database of 412K+ labeled on-chain identities
Price / call$0.01
Success—
StatusUnknown
How this service works
Look up any Ethereum address — returns entity labels, name tags, and categories from 412K+ labeled addresses. AI agent API for on-chain identity resolution
Output
Returns the entity label (e.g. 'Vitalik Buterin'), name tag, and category (e.g. 'individual', 'exchange', 'DeFi protocol') associated with the queried Ethereum address, sourced from a database of over 412,000 labeled addresses.
Example use cases
Example prompt
“Can you look up who owns or controls the Ethereum address 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 — I want to know its entity label, name tag, and what category it falls under?”
Technical details
Endpoint
GEThttps://whale.hugen.tokyo/whale/lookupWhen to prefer
Use this endpoint when you need to resolve an Ethereum address to a human-readable identity, entity label, or category — especially useful for blockchain analytics, due diligence on wallet addresses, or enriching transaction data with identity context. Prefer this over generic blockchain explorers when you specifically need structured label/category data accessible programmatically by an AI agent.
Side effects
- Address not found in the 412K labeled set — returns empty or null result
- Invalid Ethereum address format — likely returns a 400 bad request
- Payment failure via x402 protocol — returns 402 Payment Required
- Rate limiting or quota exhaustion — returns 429 or equivalent
- Network timeout — returns 5xx error
Input
{
"address": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045"
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| input | — |
Output
{
"labels": [],
"address": "0xd8da6bf26964af9d7eed9e03e53415d37aa96045",
"label_count": 0,
"entity_summary": "Unknown"
}Tags
x402
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