Base ETH Balance Lookup (eth_getBalance)

x402

Base ETH Balance Lookup (eth_getBalance) is a paid API for AI agents from api.arysphere.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-17).

Returns the native ETH balance of a Base network address by calling eth_getBalance on-chain.

Price / call$0.002

Seller volume →—

Success—

StatusUnknown

How this service works

ARYSPHERE sells AI-written verdicts on Base token contracts (a grade, a one-liner, a roast and the contract's facts) and Base/Ethereum chain reads, paid per call in USDC on Base over x402 v2. No account and no API key.

Output

A JSON object containing: 'ok' (boolean success flag), 'result' (native ETH balance as a decimal integer in wei), 'hex' (balance in hexadecimal), 'chain' ('base'), 'method' ('eth_getBalance'), and 'service' identifier. A zero balance returns result: 0 and hex: '0x0'.

Example use cases

DeFi bot pre-flight balance check

“Before executing the swap, check how much ETH is sitting in the Base wallet 0x1234567890abcdef1234567890abcdef12345678 so I know we have enough to cover gas.”

Portfolio dashboard wallet tracking

“Pull the current on-chain ETH balance for my Base address 0xdeadbeefdeadbeefdeadbeefdeadbeefdeadbeef so I can update the portfolio dashboard.”

Verify funding before NFT mint

“Check whether the Base address 0xaabbccddeeff00112233445566778899aabbccdd has any ETH balance — I need to confirm it's been funded before the NFT mint goes live.”

Technical details

Endpoint

GEThttps://api.arysphere.com/v1/ventures/x402_chain_reads_v1/base_eth_getbalance?utm_source=zero.xyz

When to prefer

Use this endpoint when you need the native ETH balance on the Base L2 network specifically — not Ethereum mainnet. Choose this over general RPC calls when you want a simple, paid, no-infrastructure REST interface to Base on-chain data without setting up your own node or managing RPC keys.

Side effects

Invalid or malformed address (not matching 0x + 40 hex pattern) returns a validation error
Address not found or never used returns balance of 0 (not an error)
Network/RPC node unavailability causes timeout or 5xx error
Payment failure (x402 protocol) if USDC balance is insufficient

Input

Schema · Request body

Field	Type	Description
inputrequired	object
output	object

Output

Schema · Response

{
  "type": "json",
  "example": {
    "ok": true,
    "hex": "0x0",
    "chain": "base",
    "method": "eth_getBalance",
    "result": 0,
    "service": "x402_chain_reads_v1.base_eth_getbalance"
  }
}

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