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Base Mainnet ETH & USDC Dual Balance Lookup
x402
Base Mainnet ETH & USDC Dual Balance Lookup is a paid API for AI agents from biosfera.46-62-215-147.sslip.io, paid per call via x402, $0.002/call, status down (last checked 2026-10-02).
Returns the live native ETH balance and USDC balance of any EVM address on Base mainnet (chain 8453) in a single call, with exact integer units, human-readable decimals, and the block number at which the data was read.
Price / call$0.002
Success—
StatusDown
How this service works
Use when you need the live native ETH balance and USDC balance of any address on Base mainnet (chain 8453) in one call. Returns exact integer units and human decimals, plus the block it was read at. Read-only, public blockchain data.
Output
Returns the native ETH balance and USDC balance of the queried address on Base mainnet, each expressed as an exact raw integer (in wei / smallest token unit) and a human-readable decimal, along with the block number at which the on-chain state was read.
Example use cases
DeFi portfolio balance snapshot
“Can you check how much ETH and USDC is sitting in wallet 0x1234567890abcdef1234567890abcdef12345678 on Base right now?”
Pre-transfer liquidity check
“Before I send tokens, tell me the current ETH and USDC balances of 0xdeadbeefdeadbeefdeadbeefdeadbeefdeadbeef on Base mainnet so I know if there's enough gas and stablecoin.”
Monitor airdrop recipient wallet
“What are the live ETH and USDC balances for 0xaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa on Base chain 8453? I want to see if the airdrop landed.”
Technical details
Endpoint
GEThttps://biosfera.46-62-215-147.sslip.io/o/base-balance?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need both the native ETH balance AND the USDC balance of a Base mainnet address in a single, low-latency call rather than making two separate ERC20 balance queries. It is ideal for agents that need a quick dual-asset snapshot on Base (chain 8453) without writing custom multi-call logic. Prefer sibling endpoints for other chains (Ethereum, Arbitrum, Optimism, Polygon) or for arbitrary ERC20 tokens beyond USDC.
Side effects
- Invalid address format (not a 0x-prefixed 40-hex-character string) returns a validation error
- Address not found on Base mainnet returns zero balances rather than an error
- RPC node temporarily unavailable may return a timeout or 5xx error
- Missing required `address` query parameter returns a 400-level error
- Stale block data if the upstream RPC is lagging behind the chain tip
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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