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Base Onchain Tools – Portfolio Balances
x402
Base Onchain Tools – Portfolio Balances is a paid API for AI agents from base-onchain-tools.dolerite.workers.dev, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-14).
Returns aggregated ETH and USDC balances across up to 20 Base mainnet addresses in a single call
Price / call$0.003
Success—
StatusUnknown
How this service works
Eleven read-only endpoints answering questions about Base mainnet that are tedious to assemble from raw RPC: what an unverified contract is actually able to do, whether a token transfer will revert and for what reason, what an arbitrary token is worth, and whether an address is safe to pay. Priced $0.001-$0.04 per call in USDC over x402. No account, no API key, no signup, no minimum, no rate limit to negotiate — the payTo address in the 402 response is the whole integration. Failed calls are not billed. The payment middleware cancels settlement on any 4xx or 5xx, so a malformed parameter or an upstream outage costs nothing. Answers are read live from Base mainnet at request time, with failover across five independent RPC providers. A batch that comes back incomplete is treated as a failure rather than returned with the missing entries as zeros, because a confident wrong answer costs a caller more than an error does. Scope is deliberately narrow: Base mainnet only, reads only, no keys held, nothing stored between requests.
Output
A JSON object with the count of addresses queried, plus aggregated totals for ETH and USDC balances across all provided addresses (e.g. {"count": 2, "totals": {"eth": "0.5", "usdc": "1200.5"}}). Balances are read live from Base mainnet. If any address data is unavailable, the entire call fails rather than returning partial results with zeros.
Example use cases
Multi-wallet treasury snapshot
“Can you pull the total ETH and USDC holdings across all five of our company's Base wallets: 0x111...aaa, 0x222...bbb, 0x333...ccc, 0x444...ddd, and 0x555...eee? I need a consolidated balance view.”
Check if addresses are funded before payment
“Before I send payments, tell me the current ETH and USDC balances for these two Base addresses: 0xAAA...111 and 0xBBB...222 — I want to make sure they're funded.”
DeFi portfolio monitoring for users
“Show me the combined onchain portfolio totals on Base for these ten addresses: 0x1a…, 0x2b…, 0x3c…, 0x4d…, 0x5e…, 0x6f…, 0x7g…, 0x8h…, 0x9i…, 0x10j… — what's the aggregate ETH and USDC?”
Technical details
Endpoint
GEThttps://base-onchain-tools.dolerite.workers.dev/v1/base/portfolioWhen to prefer
Choose this endpoint when you need a quick, multi-address ETH and USDC balance rollup on Base mainnet without setting up RPC infrastructure or API keys. It's ideal for treasury dashboards, pre-payment checks, and portfolio monitoring across up to 20 addresses. The x402 pay-per-call model at $0.003 USDC makes it cost-effective for infrequent or bursty queries. Prefer alternatives if you need balances for tokens beyond ETH/USDC, need Ethereum mainnet or other chains, need historical balances, or require writes/transactions.
Side effects
- Malformed or invalid Base addresses return a 4xx error (not billed)
- More than 20 addresses in the list causes a parameter validation error
- RPC failover exhausted across all five providers results in a 5xx (not billed)
- Partial data retrieval treated as full failure — no zero-padded partial responses returned
- Network timeout on Cloudflare Worker edge returns a 5xx error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"count": 2,
"totals": {
"eth": "0.5",
"usdc": "1200.5"
}
}
}Tags
x402
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