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NoJunk Safety Gate – x402 Endpoint Screener
x402
NoJunk Safety Gate – x402 Endpoint Screener is a paid API for AI agents from nojunk-safety-gate.mick8511.workers.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-30).
Screens an x402 paid endpoint URL before payment, returning a safety verdict (ALLOW/CAUTION/BLOCK), flags, price, and recipient wallet details.
Price / call$0.001
Success—
StatusUnknown
How this service works
Yes/no safety verdicts an agent runs before it acts: before sending funds (/wallet), buying a token (/token), opening a link (/site) or paying an x402 seller (/x402). Every answer has safe (true/false), verdict (ALLOW, CAUTION, BLOCK) and a one-line reason.
Output
Returns a JSON object with: safe (boolean), verdict (ALLOW/CAUTION/BLOCK), check type ('x402'), flags (array of issues found), pay_to (recipient wallet address), price_usd (cost in USD), network (EIP-155 chain ID), target (the URL screened), x402_version, reason (one-line explanation), checked_at (ISO timestamp), payable (boolean), and a disclaimer. Allows agents to make an informed go/no-go decision before executing a micropayment.
Example use cases
Pre-payment fraud check for agent
“My agent is about to pay an x402 endpoint at https://someapi.example.com/data — can you screen it first and tell me if it's safe, who gets paid, and how much it costs?”
Block suspicious pay-per-call URL
“Before my AI agent pays anything to https://sketchy-api.xyz/generate, run a safety gate check on that x402 URL and block the payment if anything looks off.”
Validate x402 challenge details
“I got an x402 payment challenge pointing to https://api.partner.io/report — verify the recipient wallet and price are legit before my agent proceeds with the micropayment.”
Technical details
Endpoint
POSThttps://nojunk-safety-gate.mick8511.workers.dev/x402?utm_source=zero.xyzWhen to prefer
Use this endpoint specifically when your agent is about to execute an x402 micropayment and needs a pre-flight safety check. It is purpose-built for x402 payment challenges — it validates the recipient wallet, price, network, and x402 version in one call. Prefer this over generic URL scanners when the payment protocol is x402, since it understands the x402 challenge format natively and returns structured go/no-go verdicts an agent can act on automatically.
Side effects
- Invalid or non-HTTPS URL returns an error or BLOCK verdict
- Endpoint unreachable or not an x402 endpoint may result in a BLOCK or error response
- Unknown wallet address with no history may return CAUTION rather than ALLOW
- Network timeouts on live checks could delay or fail the response
- Newly deployed malicious endpoints not yet in security databases may return ALLOW (false negative — covered by disclaimer)
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| url | string | Full https URL of the x402 paid endpoint you are about to pay |
Output
Schema · Response
{
"type": "json",
"example": {
"safe": true,
"check": "x402",
"flags": [],
"pay_to": "0x2b6D4988Db4723E6908Db86Ab2b8dFBc51FC32C5",
"reason": "Valid x402 v2 challenge: $0.003 USDC on Base to a wallet with no reports.",
"target": "https://2s.io/api/weather/zip?zip=94103",
"network": "eip155:8453",
"payable": true,
"verdict": "ALLOW",
"price_usd": 0.003,
"checked_at": "2026-10-25T14:00:00.000Z",
"disclaimer": "Automated pre-transaction screen using third-party security databases, registration records and live checks. ALLOW means no known problems were found, not a guarantee of safety. Not financial or legal advice.",
"x402_version": 2
}
}Tags
x402
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