# KushBitx AgentProof — Transaction Preflight & Risk Screening

> KushBitx AgentProof — Transaction Preflight & Risk Screening is a paid API for AI agents from kushbitx.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-10-12).

Screens a Base blockchain transaction for token risks and simulates execution before an AI agent or user submits payment, returning a safety verdict.

## Facts

- Endpoint: POST https://kushbitx.com/api/transaction-preflight?utm_source=zero.xyz
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/kushbitx-agentproof-transaction-preflight-risk-screening-13f5b45f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ebAcllbNr2N5o0yhhMP9F

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability kushbitx-agentproof-transaction-preflight-risk-screening-13f5b45f -d '<json body>'
```

Example prompt: Before you send that 0.05 ETH to 0xAbC123...def on Base, run a preflight risk check on the calldata 0xd0e30c0b and tell me if it's safe to proceed.

## When to prefer this

Use this endpoint when an AI agent or automated system needs to verify the safety of a Base blockchain transaction before executing it — especially when dealing with unknown contract addresses, user-submitted calldata, or autonomous payment flows where a bad transaction could cause financial loss. Prefer this over generic block explorers when you need a machine-readable risk verdict with confidence scoring and simulation results in a single call.

## Known failure modes

- Invalid Ethereum address format returns a validation error
- Malformed or non-hex calldata rejected with schema error
- Unsupported chain (non-Base) returns an enum validation error
- Transaction simulation failure due to insufficient gas or reverted call
- Destination contract unverified or unavailable on-chain may reduce confidence
- Network or RPC timeout returns a service error

## How this service works

Free protected spending policies for AI agents, plus pay-per-call Base transaction preflight, token risk and USDC payment verification. JavaScript SDK available on npm.

## Output

Returns a JSON object with a verdict containing a numeric risk score, a decision (e.g. ALLOW or BLOCK), and a confidence level (e.g. high/medium/low), plus a findings array listing specific risk signals, a simulation object with execution results, and a destination object with metadata about the target address.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "to": {
   "type": "string",
   "pattern": "^0x[a-fA-F0-9]{40}$",
   "description": "Transaction destination."
  },
  "data": {
   "type": "string",
   "pattern": "^0x([a-fA-F0-9]{2})*$",
   "description": "Unsigned calldata."
  },
  "from": {
   "type": "string",
   "pattern": "^0x[a-fA-F0-9]{40}$",
   "description": "Optional sender used for simulation."
  },
  "chain": {
   "enum": [
    "base"
   ],
   "type": "string"
  },
  "valueWei": {
   "type": "string",
   "pattern": "^[0-9]+$",
   "description": "Native ETH value in wei."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "verdict": {
   "score": 0,
   "decision": "ALLOW",
   "confidence": "high"
  },
  "findings": [],
  "simulation": {},
  "destination": {}
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/kushbitx-agentproof-transaction-preflight-risk-screening-13f5b45f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from kushbitx.com](https://www.zero.xyz/host/kushbitx.com/llms.txt)