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Base Wallet Portfolio Balances API
x402
Base Wallet Portfolio Balances API is a paid API for AI agents from build-4c941cab041172e9439ece2f.emblem.build, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).
Fetches native ETH and major ERC-20 token balances with USD values and a total portfolio value for a given Base wallet address in a single call.
Price / call$0.005
Success—
StatusUnknown
How this service works
Base wallet portfolio in one call: native + major ERC-20 balances with USD values and total. Onchain USDC pay-per-call.
Output
Returns a breakdown of the wallet's native ETH balance and balances of major ERC-20 tokens on Base, each with their current USD price and value, plus a grand total portfolio value in USD — all in a single structured response.
Example use cases
DeFi portfolio tracker for a user
“What's the total value of my Base wallet 0xAbC123...? Show me the ETH balance and all the ERC-20 tokens with their USD prices.”
Multi-wallet net worth dashboard
“I manage a few wallets — can you grab the native and ERC-20 balances with USD values for 0xDead...Beef so I can add it to my net worth tracker?”
Pre-trade balance check for an agent
“Before I make a swap, check what tokens and how much ETH are in my Base wallet 0x9F...77 and give me the total USD value of the portfolio.”
Technical details
Endpoint
POSThttps://build-4c941cab041172e9439ece2f.emblem.build/pub/tasks/x402-onchain/api/portfolioWhen to prefer
Choose this endpoint when you need a one-shot aggregated view of a wallet's native ETH and major ERC-20 holdings with USD valuations on the Base network, rather than querying individual token contracts or price feeds separately. Ideal for portfolio dashboards, pre-trade checks, or agent-driven net worth calculations on Base.
Side effects
- Invalid or malformed wallet address returns an error
- Unrecognized or non-Base address may return empty balances
- Network or RPC timeout may cause a temporary failure
- Payment not processed (x402 USDC payment failure) results in 402 error
- Token price data unavailable may cause missing USD values for some assets
Tags
x402
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