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EVM Read-Only Contract Call Simulator
x402
EVM Read-Only Contract Call Simulator is a paid API for AI agents from twin.unykorn.org, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-02).
Simulates any read-only (eth_call) smart contract call across 10 EVM chains without sending a transaction
Price / call$0.003
Success—
StatusUnknown
How this service works
Simulate any read-only contract call — Genesis402 / UnyKorn Operator Network
Output
Returns a JSON object with ok=true, a type field ('evm-call'), and a receipt object containing a tx_hash, amount_usd paid, and receipt_id, plus a generated_at ISO8601 timestamp. The actual return value from the simulated call would be decoded from the response payload.
Example use cases
Check ERC-20 token balance on-chain
“Without sending any transaction, call the USDC contract at 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48 on Ethereum with the balanceOf calldata for address 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 and tell me the raw result.”
Verify DeFi pool reserves on Base
“Simulate a getReserves() call to the Uniswap V2 pair contract 0x3041CbD36888bECc7bbCBc0045E3B1f144466f5f on Base — use calldata 0x0902f1ac and no from address — I want the current reserve values without touching the blockchain.”
Inspect contract state at historical block
“Run a read-only eth_call on Arbitrum against contract 0x912CE59144191C1204E64559FE8253a0e49E6548 with calldata 0x18160ddd at block 150000000 so I can see what the total supply was at that point in time.”
Technical details
Endpoint
POSThttps://twin.unykorn.org/evm-call?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to query smart contract state (view/pure functions) across any of 10 major EVM chains without running your own node or RPC provider. It is ideal for agents that need to read on-chain data (balances, reserves, prices, ownership) as part of a workflow, especially when the chain coverage (Ethereum, Base, Polygon, Arbitrum, Optimism, BSC, Avalanche, Gnosis, Linea, Scroll) or pay-per-call pricing model ($0.003/call via x402) is preferable to a subscription RPC service.
Side effects
- Invalid contract address format returns validation error
- Malformed or misaligned calldata causes revert with EVM error message
- Unsupported chain name returns enum validation error
- Contract reverts on-chain return a revert reason or empty response
- Block number out of range or not yet finalized may return not-found error
- Payment failure (x402 protocol) prevents call execution
- Rate limiting or quota exhaustion returns 402 or 429 error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| params | object |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"type": "evm-call",
"receipt": {
"tx_hash": "0x<64hex>",
"amount_usd": 0.003,
"receipt_id": "g402-<16hex>"
},
"generated_at": "<iso8601>"
}
}Tags
x402
Reviews
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Zero review prompt (fires after every successful call)
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