KushBitx AgentProof
Simulate one unsigned Base transaction before an agent signs it. Runs eth_call and gas estimation on current chain state, decodes the intent (ERC-20 transfer, approve, NFT setApprovalForAll), flags unlimited approvals, calldata sent to a non-contract, zero-address targets, reverts and destination risk labels such as phishing or sanctions. Returns ALLOW, WARN, BLOCK or INCOMPLETE with findings. No key or signed transaction is requested.
Offering
- Provider
- kushbitx.com
- Method
- POST
- Offering type
- Api Endpoint
- Transport type
- http
- Category
- Infrastructure
- Delivery
- Not provided
- Pricing model
- Not provided
- x402 version
- 2
Endpoint context
- URL
https://kushbitx.com/api/transaction-preflight- MIME type
- application/json
- First seen
- 2026-10-16T01:50:03.832Z
- Last seen
- Tags
- Crypto, Security, Transaction, simulation, Agents, X402, Verification, kushbitx, payment-verification, Base, USDC, Agent-Infra
Payment pricing
x402 payment terms are the authoritative price for calling this endpoint.
- Payment option 1
- 0.001 USDC
Atomic price: 1000 · Network: eip155:8453 · Asset: USDC · Scheme: exact
Raw x402 terms
[
{
"scheme": "exact",
"network": "eip155:8453",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"amount": "1000",
"payTo": "0x0d68028d06af13379C872FEE032568B4Be712f22"
}
]Observed health
- Status
- Healthy
- Latest latency
- 104 ms
- Average latency
- 461 ms
- HTTP status
- 204
- Last checked
- Reachability
- 100% over 14 checks
Latency is measured to the first response headers. A reachable result does not verify response accuracy or merchant identity.
Input schema
{
"type": "object",
"properties": {
"type": {
"type": "string",
"enum": [
"http"
]
},
"method": {
"type": "string",
"enum": [
"POST"
]
},
"bodyType": {
"type": "string",
"enum": [
"json"
]
},
"body": {
"type": "object",
"properties": {
"chain": {
"type": "string",
"enum": [
"base"
]
},
"from": {
"type": "string",
"pattern": "^0x[a-fA-F0-9]{40}$",
"description": "Optional sender used for simulation."
},
"to": {
"type": "string",
"pattern": "^0x[a-fA-F0-9]{40}$",
"description": "Transaction destination."
},
"valueWei": {
"type": "string",
"pattern": "^[0-9]+$",
"description": "Native ETH value in wei."
},
"data": {
"type": "string",
"pattern": "^0x([a-fA-F0-9]{2})*$",
"description": "Unsigned calldata."
}
},
"required": [
"chain",
"to"
],
"additionalProperties": false
}
},
"required": [
"type",
"method",
"bodyType",
"body"
]
}Output schema
{
"$schema": "http://json-schema.org/draft-07/schema#",
"properties": {
"input": {
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"chain": {
"enum": [
"base"
],
"type": "string"
},
"data": {
"description": "Unsigned calldata.",
"pattern": "^0x([a-fA-F0-9]{2})*$",
"type": "string"
},
"from": {
"description": "Optional sender used for simulation.",
"pattern": "^0x[a-fA-F0-9]{40}$",
"type": "string"
},
"to": {
"description": "Transaction destination.",
"pattern": "^0x[a-fA-F0-9]{40}$",
"type": "string"
},
"valueWei": {
"description": "Native ETH value in wei.",
"pattern": "^[0-9]+$",
"type": "string"
}
},
"required": [
"chain",
"to"
],
"type": "object"
},
"bodyType": {
"enum": [
"json"
],
"type": "string"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"type": {
"enum": [
"http"
],
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"chain": {
"const": "base",
"type": "string"
},
"destination": {
"properties": {
"address": {
"pattern": "^0x[a-fA-F0-9]{40}$",
"type": "string"
},
"balanceWei": {
"type": [
"string",
"null"
]
},
"bytecodeBytes": {
"type": "integer"
},
"externalRiskCheckAvailable": {
"type": "boolean"
},
"externalRiskSignals": {
"items": {
"type": "string"
},
"type": "array"
},
"type": {
"type": "string"
}
},
"type": "object"
},
"findings": {
"items": {
"properties": {
"category": {
"type": "string"
},
"code": {
"type": "string"
},
"points": {
"type": "number"
},
"reason": {
"type": "string"
},
"severity": {
"enum": [
"critical",
"high",
"medium",
"low",
"info"
],
"type": "string"
}
},
"required": [
"code",
"severity",
"reason"
],
"type": "object"
},
"type": "array"
},
"generatedAt": {
"format": "date-time",
"type": "string"
},
"intent": {
"properties": {
"amountAtomic": {
"type": "string"
},
"approved": {
"type": "boolean"
},
"operator": {
"pattern": "^0x[a-fA-F0-9]{40}$",
"type": "string"
},
"selector": {
"type": "string"
},
"spender": {
"pattern": "^0x[a-fA-F0-9]{40}$",
"type": "string"
},
"type": {
"enum": [
"native_transfer",
"contract_call",
"erc20_approve",
"nft_set_approval_for_all",
"erc20_transfer",
"erc20_transfer_from"
],
"type": "string"
},
"unlimitedApproval": {
"type": "boolean"
}
},
"required": [
"selector",
"type"
],
"type": "object"
},
"limitations": {
"items": {
"type": "string"
},
"type": "array"
},
"receipt": {
"description": "Added by the paid endpoint: saved report ID, amount, network and settlement transaction.",
"properties": {
"amountUsdc": {
"type": "string"
},
"createdAt": {
"format": "date-time",
"type": "string"
},
"expiresAt": {
"format": "date-time",
"type": "string"
},
"network": {
"const": "base",
"type": "string"
},
"reportId": {
"type": "string"
},
"service": {
"type": "string"
},
"transaction": {
"type": [
"string",
"null"
]
}
},
"type": "object"
},
"reportVersion": {
"type": "string"
},
"simulation": {
"properties": {
"attempted": {
"type": "boolean"
},
"callError": {
"type": [
"string",
"null"
]
},
"gasError": {
"type": [
"string",
"null"
]
},
"gasEstimate": {
"type": [
"string",
"null"
]
},
"returnData": {
"type": [
"string",
"null"
]
},
"success": {
"type": [
"boolean",
"null"
]
}
},
"type": "object"
},
"sources": {
"items": {
"type": "object"
},
"type": "array"
},
"transaction": {
"properties": {
"data": {
"type": "string"
},
"from": {
"pattern": "^0x[a-fA-F0-9]{40}$",
"type": "string"
},
"to": {
"pattern": "^0x[a-fA-F0-9]{40}$",
"type": "string"
},
"valueWei": {
"type": "string"
}
},
"type": "object"
},
"verdict": {
"properties": {
"confidence": {
"type": "string"
},
"decision": {
"enum": [
"ALLOW",
"WARN",
"BLOCK",
"INCOMPLETE"
],
"type": "string"
},
"score": {
"type": "number"
},
"summary": {
"type": "string"
}
},
"required": [
"decision",
"summary"
],
"type": "object"
}
},
"required": [
"reportVersion",
"generatedAt",
"chain",
"verdict",
"transaction",
"intent",
"destination",
"simulation",
"findings"
],
"type": "object"
},
"type": {
"enum": [
"json"
],
"type": "string"
}
},
"required": [
"type",
"example"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}