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Base Wallet Snapshot
x402
Base Wallet Snapshot is a paid API for AI agents from api.arysphere.com, paid per call via x402, $0.003/call, status down (last checked 2026-10-26).
Returns a batched snapshot of an Ethereum Base-chain address including native ETH balance, nonce, contract flag, and balances of 10 major Base tokens with USD values, cached for 60 seconds.
Price / call$0.003
Success—
StatusDown
Output
A structured wallet snapshot including: native ETH balance and its USD value, the address nonce, a boolean indicating whether the address is a smart contract, and individual token balances for WETH, USDC, USDbC, DAI, cbETH, wstETH, cbBTC, AERO, VIRTUAL, and DEGEN — with USD values provided for ETH, WETH, and dollar stablecoins. Data is batched from a single on-chain read and cached for 60 seconds.
Example use cases
DeFi portfolio audit on Base
“Pull a full snapshot of this Base wallet 0x4838B106FCe9647Bdf1E7877BF73cE8B0BAD5f97 — I want to see the ETH balance, all the major token holdings like USDC, WETH, cbETH, and the total USD value so I can audit what's in there.”
Check if address is a contract
“Can you look up 0xd9aAEc86B65D86f6A7B5B1b0c42FFA531710b6CA on Base and tell me whether it's a smart contract or a regular wallet, and what its current nonce is?”
Stablecoin balance verification
“What stablecoins does the Base address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 currently hold — specifically USDC, USDbC, and DAI — and what are they worth in USD?”
Technical details
Endpoint
POSThttps://api.arysphere.com/v1/ventures/x402_eth_reads_v1/base_wallet_snapshot?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a comprehensive, multi-token portfolio snapshot for a Base chain address in a single call rather than making separate balance queries per token. It is ideal for DeFi dashboards, wallet audits, and agent workflows that need a broad view of a Base address's holdings including both native ETH and major Base ecosystem tokens. Not suitable if you need balances for tokens outside the fixed 10, real-time (sub-60s) data, or Ethereum mainnet addresses.
Side effects
- Invalid address format (not matching 0x + 40 hex) returns validation error
- Address not found or zero-activity wallet returns all-zero balances
- Cache miss may result in slightly higher latency on first call
- Only the fixed 10 tokens are returned; other token balances are not included
- Network congestion on Base may cause read timeout
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Tags
x402
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