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Ethereum Address Activity Lookup
x402
Ethereum Address Activity Lookup is a paid API for AI agents from asistent-crypto.vercel.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).
Returns the ETH balance and recent large transfers in and out for a given Ethereum address
Price / call$0.01
Success—
StatusUnknown
How this service works
Ethereum address activity: ETH balance plus recent large transfers in and out. Point it at an exchange wallet, a treasury or a wallet a headline just named, and get the movement behind the story rather than the story.
Output
Returns the ETH balance of the specified address along with a list of recent large transfers (both inflows and outflows), including transfer amounts, counterparty addresses, and direction, enabling on-chain movement analysis without needing a full blockchain explorer.
Example use cases
Investigate exchange wallet after headline
“I just saw a news article about Binance's cold wallet — can you check the ETH balance and recent large transfers for 0xBE0eB53F46cd790Cd13851d5EFf43D12404d33E8 so I can see the actual on-chain activity behind the story?”
Monitor DAO treasury wallet activity
“Keep an eye on this DAO treasury address 0x8617E340B3D01FA5F11F306F4090FD50E238070D — what's the current ETH balance and have there been any large transfers recently?”
Due diligence on a named wallet
“Someone on crypto Twitter is claiming this wallet 0xAb5801a7D398351b8bE11C439e05C5B3259aeC9B is about to dump — can you pull the ETH balance and recent big outbound transfers so I can see if there's anything to it?”
Technical details
Endpoint
POSThttps://asistent-crypto.vercel.app/api/x402/data/addressWhen to prefer
Use this endpoint when you need a quick snapshot of a specific Ethereum address — its current ETH balance plus recent large-value transfers — without querying a full blockchain explorer. Ideal for investigating wallets named in news stories, monitoring exchange or treasury wallets, or doing rapid due diligence on a specific address. Prefer this over general market data endpoints when the user has a specific address in mind and wants movement context, not price data.
Side effects
- Invalid or malformed Ethereum address returns an error
- Address with no recent large transfers returns empty transfer list but valid balance
- Network or RPC provider downtime may cause timeouts
- Payment failure (insufficient USDC or x402 protocol error) blocks the request
- Rate limiting if called too frequently
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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