Simulates an EVM transaction execution without broadcasting
Simulates an EVM transaction execution without broadcasting: { chain, from, to, data, value }. Returns eth_call output, gas estimate, success/revert status with decoded revert reason (Error(string), Panic(uint256)), and token balance if to is an ERC-20. State overrides not supported by public RPCs. Information only, not financial advice.
Answeringour last check, 2026-10-18
1 of 1checks answered this week
560 msmedian answer time
$0.003listed price per call
$0.003price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
POST https://api.sitecheck-api.workers.dev/api/evm/simulate
| Category | Code and developer |
|---|---|
| Provider host | api.sitecheck-api.workers.dev |
| Networks | eip155:5042, eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp |
| Payment schemes | exact |
| Self-reported calls, 30 days | 2 from 2 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-18 | valid payment request | 402 | $0.003 | 560 ms |
Example input (from the provider)
{
"body": {
"chain": "ethereum",
"data": "0x70a082310000000000000000000000000000000000000000000000000000000000000000",
"from": "0x0000000000000000000000000000000000000000",
"to": "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48"
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"properties": {
"chain": {
"description": "Target EVM chain name (e.g. ethereum, base, arbitrum)",
"type": "string"
},
"data": {
"description": "Transaction calldata in 0x hex format",
"type": "string"
},
"from": {
"description": "Sender 42-character 0x hex address",
"type": "string"
},
"to": {
"description": "Target contract 42-character 0x hex address",
"type": "string"
},
"value": {
"description": "Optional value in wei (hex or decimal string)",
"type": "string"
}
},
"required": [
"chain",
"to"
]
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}