Run a transaction simulation and EVM safety preflight with gas, destination proxy evidence
Run a transaction simulation and EVM safety preflight with gas, destination proxy evidence, and optional token security and allowance checks in one decision-ready report.
5000 (raw units)
price
4
calls / 30d
2
unique payers
2026-09-05
updated
Provider
ai-data-marketplace-1042299154756.us-central1.run.app · discovered, not yet claimed by its owner
Payment (x402 accepts[])
[
{
"scheme": "exact",
"network": "eip155:8453",
"payTo": "0x8647F7D7a1368a467Ad1FF757fBc2e7167973558",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"amount": "5000",
"maxTimeoutSeconds": 300
}
]Output schema
{
"bazaar": {
"info": {
"input": {
"body": {
"chain": "base",
"data": "0x",
"from": "0x0000000000000000000000000000000000000001",
"to": "0x0000000000000000000000000000000000000002",
"value": "0x0"
},
"bodyType": "json",
"method": "POST",
"type": "http"
},
"output": {
"example": {
"broadcast": false,
"checks_completed": 3,
"decision": "no_obvious_issue_detected",
"success": true
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": true,
"properties": {
"chain": {
"description": "base, ethereum, or arbitrum; defaults to base.",
"type": "string"
},
"data": {
"description": "Hex calldata; defaults to 0x.",
"type": "string"
},
"from": {
"description": "Optional sender address for simulation.",
"type": "string"
},
"spender": {
"description": "Optional spender for allowance evidence when from and token_contract are supplied.",
"type": "string"
},
"to": {
"description": "Destination contract or wallet address.",
"type": "string"
},
"token_contract": {
"description": "Optional token contract for GoPlus security evidence.",
"type": "string"
},
"value": {
"description": "Hex native-token value; defaults to 0x0.",
"type": "string"
}
},
"required": [
"to"
],
"type": "object"
},
"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": {
"additionalProperties": true,
"properties": {
"broadcast": {
"type": "boolean"
},
"checks_completed": {
"type": "integer"
},
"decision": {
"type": "string"
},
"success": {
"type": "boolean"
}
},
"required": [
"success",
"broadcast",
"decision",
"checks_completed"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
}Use it
curl
curl "https://ai-data-marketplace-1042299154756.us-central1.run.app/api/v1/transaction_preflight" # -> 402 Payment Required, accepts[] lists how to pay # retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid
JavaScript
const res = await fetch("https://ai-data-marketplace-1042299154756.us-central1.run.app/api/v1/transaction_preflight");
if (res.status === 402) {
const { accepts } = await res.json();
// pay one of accepts[] via an x402 client, then retry with the payment header
}Python
import httpx
res = httpx.get("https://ai-data-marketplace-1042299154756.us-central1.run.app/api/v1/transaction_preflight")
if res.status_code == 402:
accepts = res.json()["accepts"]
# pay one of accepts[] via an x402 client, then retry with the payment headerMachine-readable
Everything on this page is also available as clean JSON at /resources/3221.json, and this resource appears in /discovery/resources and /discovery/search.