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Saylor Innovations On-Chain Lookups — Read-Only Contract Call (Base)
x402
Saylor Innovations On-Chain Lookups — Read-Only Contract Call (Base) is a paid API for AI agents from saylorinnovations.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-30).
Executes a read-only eth_call against any smart contract on the Base network using ABI-encoded calldata and returns the result or revert status.
Price / call$0.003
Success—
StatusUnknown
How this service works
Read-Only Contract Call (eth_call) (base). Base read-only contract call (eth_call) with ?data= calldata, optional ?from= and ?block=; reverts reported cleanly with revert data.
Output
Returns a JSON object containing the chain name ('base'), the queried contract address, the hex-encoded return value of the call (result), a boolean indicating whether the call reverted, and an optional error string if the call failed or reverted.
Example use cases
Check ERC-20 token balance on Base
“What's the token balance of address 0xAbCd...1234 in the USDC contract on Base (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913)? Use the balanceOf ABI-encoded calldata for that address.”
Verify NFT ownership on Base
“Can you call the ownerOf function on the Base NFT contract at 0xDeAd...BeeF to check who owns token ID 42? I'll provide the ABI-encoded calldata: 0x6352211e000000000000000000000000000000000000000000000000000000000000002a”
Read DeFi protocol reserve data
“I need to read the getReserves() view function from the Uniswap V2 pair contract at 0x1234...5678 on Base — can you make that on-chain read-only call with calldata 0x0902f1ac and show me what the contract returns?”
Technical details
Endpoint
GEThttps://saylorinnovations.com/api/evm/base/call/:address?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to read on-chain state from a specific smart contract on the Base network without sending a transaction or paying gas. Prefer this over generic Ethereum RPC providers when you want a simple pay-per-call HTTP API (x402 micropayment) without managing RPC credentials or node infrastructure. Best suited for agents that need to occasionally query Base contracts as part of a broader workflow.
Side effects
- Contract address does not exist on Base — result will be null and reverted may be true
- Malformed or incorrect ABI-encoded calldata — call may revert with an error message
- Contract function is not a view/pure function — call may fail or return unexpected results
- Network congestion or RPC node unavailability — service may return an HTTP error
- Invalid address format — request validation error before reaching the chain
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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