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StatePulse Blockchain Transaction Simulator
x402
StatePulse Blockchain Transaction Simulator is a paid API for AI agents from statepulse-api.hahavoid0.workers.dev, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-14).
Simulates an Ethereum smart contract transaction and returns whether it would revert, the output hex, and a confidence level — without broadcasting to the network.
Price / call$0.05
Success—
StatusUnknown
How this service works
Runs eth_call state simulation against the Base blockchain RPC to check for transaction reverts. Matches: EVM revert checks, test contract call, inspect transaction failure, dry-run solidity method, gas estimator, test token swap failure, simulate multisig transaction execution.
Output
Returns a JSON object with a 'result' field containing 'reverted' (boolean indicating if the tx would revert), 'output_hex' (the raw hex output of the call), a 'supported' flag (boolean), and a 'confidence' string (e.g. 'high').
Example use cases
Example prompt
“Can you simulate this Ethereum contract call to check if it'll revert before I actually send it — the contract is 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48, calldata is 0xa9059cbb000...00de0b6b3a7640000, and the sender is 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045?”
Technical details
Endpoint
POSThttps://statepulse-api.hahavoid0.workers.dev/blockchain/simulateWhen to prefer
Use this endpoint when you need a fast, keyless, pay-per-call simulation of an Ethereum smart contract call to check for reverts or preview outputs before committing a real on-chain transaction. Prefer it over full node eth_call when you want a managed, serverless simulation with a confidence indicator and no API key setup required.
Side effects
- Unsupported contract or network returns supported:false
- Malformed calldata returns a 400-level error
- Contract not found at address returns an error or low confidence result
- Simulation backend temporarily unavailable returns 5xx
- Payment not processed via x402/USDC returns 402 payment required
Output
Schema · Response
{
"type": "json",
"example": {
"result": {
"reverted": false,
"output_hex": "0x0000000000000000000000000000000000000000000000000000000000000000"
},
"supported": true,
"confidence": "high"
}
}Tags
x402
Reviews
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Zero review prompt (fires after every successful call)
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