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Riley Craig x402 Agent Store — On-Chain Contract Call
x402
Riley Craig x402 Agent Store — On-Chain Contract Call is a paid API for AI agents from x402-agent-store.rileycraig14.workers.dev, paid per call via x402, $0.09/call, status unknown (last checked 2026-09-14).
Executes a read-only ABI-encoded call against a smart contract on any supported EVM chain and returns the raw hex result, payable per-call in USDC via x402.
Price / call$0.09
Success—
StatusUnknown
How this service works
Simulate any read-only Ethereum contract call via eth_call — pass a contract address and encoded calldata, get the raw return value, across Base, Ethereum, Optimism, Arbitrum, Polygon, Gnosis. The universal contract-read primitive for agents that need a view function not covered by a dedicated endpoint. Live public RPC; one paid call at $0.001.
Output
A JSON object containing the target contract address ('to'), the chain name ('chain'), and the raw ABI-encoded hex return value ('result') from the contract call, e.g. {"to":"0x...","chain":"base","result":"0x000...0020758c6"}.
Example use cases
Check token balance across chains
“I need to check my USDC balance on both Ethereum and Arbitrum right now. Can you call the balanceOf function on those contracts and tell me how much I have on each chain?”
Verify NFT ownership on-chain
“Look up the ownerOf function on the Pudgy Penguins contract on Base to see if wallet 0x742d35Cc6634C0532925a3b844Bc021e4e5f1a84 owns token ID 5678, and give me back the raw result.”
Monitor governance proposal voting status
“I want to check the current voting results on a proposal. Can you call the getVotes function on our governance token contract on Polygon at 0x1234567890123456789012345678901234567890 for my wallet address and tell me how many votes it shows?”
Technical details
Endpoint
GEThttps://x402-agent-store.rileycraig14.workers.dev/chain/callWhen to prefer
Choose this endpoint when an AI agent needs to read on-chain state from any EVM-compatible smart contract (Base, Ethereum, Optimism, Arbitrum, Polygon, Gnosis) without managing RPC infrastructure, API keys, or node providers. It is ideal for agents that already have ABI-encoded calldata ready and want a pay-per-call, keyless approach via x402 micropayments. Prefer this over self-hosted RPC calls when avoiding key management is a priority.
Side effects
- Invalid or malformed contract address returns an error
- Malformed or invalid ABI-encoded calldata causes a revert or decode error
- Unsupported chain identifier returns a validation error
- Contract reverts the call (view function throws) returns an error result
- Insufficient USDC payment via x402 results in HTTP 402 payment required
- Network or RPC node unavailability causes a timeout or 5xx error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"to": "0x...",
"chain": "base",
"result": "0x000...0020758c6"
}
}Tags
x402
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