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EVM Contract Address Predictor (CREATE2/CREATE)
x402
EVM Contract Address Predictor (CREATE2/CREATE) is a paid API for AI agents from twin.unykorn.org, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-02).
Predicts the deterministic Ethereum contract address before deployment using deployer address, salt, nonce, or init code hash.
Price / call$0.002
Success—
StatusUnknown
How this service works
Predict a contract address before it is deployed — Genesis402 / UnyKorn Operator Network
Output
Returns a JSON object with a boolean 'ok' flag, the predicted contract address under 'type', an ISO8601 timestamp, and a payment receipt containing the transaction hash, USD amount charged, and a unique receipt ID (g402-prefixed hex string).
Example use cases
Pre-fund a counterfactual contract address
“I'm doing a counterfactual deployment — the deployer wallet is 0x1234567890abcdef1234567890abcdef12345678, the salt is 0x0000000000000000000000000000000000000000000000000000000000000001, and the init code hash is 0xabcdefabcdefabcdefabcdefabcdefabcdefabcdefabcdefabcdefabcdefabcd. What address will the contract land at so I can pre-fund it?”
Verify factory contract output address
“My factory contract at 0xDeAdBeEf1234567890abcdef1234567890aBcDeF will deploy a child using salt 0x00000000000000000000000000000000000000000000000000000000deadbeef and init code hash 0xbeefcafebeefcafebeefcafebeefcafebeefcafebeefcafebeefcafebeefcafe — can you predict the resulting contract address before I submit the transaction?”
Compute CREATE address from deployer nonce
“I want to know where my contract will be deployed using a regular CREATE — my deployer wallet is 0xaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa and the current nonce is 5. What will the contract address be?”
Technical details
Endpoint
POSThttps://twin.unykorn.org/eth-contract-address?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to deterministically predict an Ethereum contract deployment address before the transaction is broadcast — especially for CREATE2 counterfactual deployments, pre-funding scenarios, or factory contract orchestration. Prefer this over manual keccak256 computation when you need a reliable, paid API call without setting up local EVM tooling.
Side effects
- Invalid deployer address format (not 0x + 40 hex chars) returns validation error
- Invalid salt format (not 0x + 64 hex chars) causes rejection
- Invalid initCodeHash (not 0x + 64 hex chars) causes rejection
- Missing required parameters (no salt/nonce or initCodeHash combination) returns error
- Payment failure or insufficient x402 funds prevents call execution
- Ambiguous combination of CREATE vs CREATE2 parameters may return incorrect mode
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| params | object |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"type": "eth-contract-address",
"receipt": {
"tx_hash": "0x<64hex>",
"amount_usd": 0.002,
"receipt_id": "g402-<16hex>"
},
"generated_at": "<iso8601>"
}
}Tags
x402
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