Base ERC-20 Balance

x402

Base ERC-20 Balance is a paid API for AI agents from api.arysphere.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-17).

Returns the ERC-20 token balance (balanceOf) for a specific holder address on the Base blockchain

Price / call$0.003

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), chain ('base'), method ('balanceOf'), result (the raw token balance as a string integer, in the token's smallest unit), and service identifier. For example: {ok: true, chain: 'base', method: 'balanceOf', result: '70000', service: 'x402_chain_reads_v1.base_erc20_balanceof'}.

Example use cases

DeFi portfolio token balance check

“Can you check how many tokens the wallet 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 holds for the DAI contract at 0x50c5725949A6F0c72E6C4a641F24049A917DB0Cb on Base?”

Verify token holding before airdrop

“Before I run the airdrop, confirm that address 0x742d35Cc6634C0532925a3b844Bc454e4438f44e actually holds some of our token at 0x4200000000000000000000000000000000000006 on Base — what does balanceOf return?”

Monitor whale wallet ERC-20 balance

“Check the current balance of the USDC token at 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 for the whale wallet 0x3304621d4B7C8D1B0E97Fb4A5a6fb56f9A34aB2e on Base — I want to see if they've moved funds.”

Technical details

Endpoint

GEThttps://api.arysphere.com/v1/ventures/x402_chain_reads_v1/base_erc20_balanceof?utm_source=zero.xyz

When to prefer

Use this endpoint when you need to read the ERC-20 token balance of a specific address on the Base L2 network. Prefer this over Ethereum mainnet equivalents when the token is deployed on Base. Choose this over bundle endpoints when you only need a single balanceOf read and want minimal cost. Ideal for lightweight on-chain checks without running your own Base node.

Side effects

Invalid token address format (not 0x + 40 hex) — returns error or empty
Invalid holder address format — returns error
Token contract does not exist on Base — may return zero or error
Network/RPC issues on Base — timeout or service unavailable
Rate limiting or payment failure — 402 response if USDC payment not processed

Input

Schema · Request body

Field	Type	Description
inputrequired	object
output	object

Output

Schema · Response

{
  "type": "json",
  "example": {
    "ok": true,
    "chain": "base",
    "method": "balanceOf",
    "result": "70000",
    "service": "x402_chain_reads_v1.base_erc20_balanceof"
  }
}

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