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x402-defi-intel Transaction Simulator
x402
x402-defi-intel Transaction Simulator is a paid API for AI agents from cryptodefidataintel-production.up.railway.app, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-13).
Simulates an EVM transaction on a specified chain before execution to predict success, gas cost, and revert reason
Price / call$0.005
Success—
StatusUnknown
How this service works
Crypto-agent toolkit: cross-chain DeFi intelligence + execution helpers + retrieval for agents. 16 endpoints: funding, open interest, long/short, token-safety, yield, prices, gas, tx-simulate, approval-check, bridge-quote, governance-search, lending, liquidations, protocol-search, swap-quote, token-resolve. Pay-per-call via x402.
Output
Returns a signal ('will_succeed' or similar), a human-readable insight string, willRevert boolean, revertReason (if any), gasEstimate in gas units, gasCostEth in ETH, the chain name, confidence score, and data sources used (e.g. public-rpc).
Example use cases
Dry-run token swap before executing
“Before I actually submit this swap, can you simulate it for me on Ethereum? I'm calling the Uniswap router at 0x68b3...e5f2 with my swap calldata from wallet 0xdef...789 — I want to know if it'll go through or revert, and roughly what the gas will cost me in ETH.”
Check if approval call will revert
“I'm about to send a token approval on Arbitrum to the AAVE lending pool at 0x794a...c31b from my wallet 0xabc...123 — can you dry-run it first and tell me whether it'll succeed, why it might revert, and how much gas I should expect?”
Pre-flight check contract interaction
“I've got some calldata I want to send to a smart contract on Base — the target is 0x9f8f...4d2a, I'm sending from 0xfee...c0de with 0.05 ETH value — can you simulate it before I pull the trigger and give me the revert reason if it's going to fail?”
Technical details
Endpoint
GEThttps://cryptodefidataintel-production.up.railway.app/api/tx-simulateWhen to prefer
Use this endpoint when an AI agent needs to pre-flight check an EVM transaction before actual on-chain submission — especially useful for DeFi operations like swaps, approvals, or contract calls where reverts are costly. Prefer over static analysis when you need real-time chain-state simulation with gas estimation and revert reason decoding.
Side effects
- Missing required 'chain' or 'to' parameter returns validation error
- Unsupported chain name causes lookup failure
- Malformed calldata may cause simulation to return revert with cryptic reason
- Node RPC unavailability causes low confidence or error response
- Very new or unverified contract addresses may produce unreliable results
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"data": {
"chain": "base",
"gasCostEth": 9e-7,
"willRevert": false,
"gasEstimate": 46000,
"revertReason": null
},
"signal": "will_succeed",
"insight": "Transaction would SUCCEED against current base state.",
"sources": [
"public-rpc"
],
"confidence": 0.85
}
}Tags
x402
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