# x402 Endpoint Safety Verifier

> x402 Endpoint Safety Verifier is a paid API for AI agents from judicious-earnest-vaporware.replit.app, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-02).

Checks whether a given x402 payment endpoint is safe to pay by evaluating liveness, 402-compliance, payTo/price sanity, and landmine flags, returning a safety verdict of SAFE, CAUTION, SUSPECT, or DEAD.

## Facts

- Endpoint: GET https://judicious-earnest-vaporware.replit.app/verify?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-endpoint-safety-verifier-3ea71e9a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_sr9EiChldZyKiRbHx3iOb

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 x402-endpoint-safety-verifier-3ea71e9a
```

Example prompt: Before paying that x402 API, can you safety-check https://some-api.example.com/data — I want to know if it's SAFE, CAUTION, SUSPECT, or DEAD before my agent sends any USDC?

## When to prefer this

Use this endpoint before your agent pays any x402 micropayment endpoint, especially when the endpoint was discovered dynamically or from an untrusted source. It is purpose-built for x402 safety screening with liveness checks, compliance validation, and fraud-signal detection — prefer it over generic uptime monitors or manual inspection when you need a structured SAFE/CAUTION/SUSPECT/DEAD verdict before committing funds.

## Known failure modes

- Target URL unreachable — endpoint may return DEAD verdict
- Target does not respond with HTTP 402 — flagged as non-compliant
- Missing or malformed target query parameter — returns 400 error
- Target has suspicious payTo address — returns SUSPECT with flags
- Price anomaly detected on target — returns CAUTION or SUSPECT
- Verifier service itself is down — no response from /verify

## How this service works

Checks whether an x402 endpoint is safe to pay: liveness, 402-compliance, payTo/price sanity, landmine flags; returns SAFE/CAUTION/SUSPECT/DEAD

## Output

A safety verdict of SAFE, CAUTION, SUSPECT, or DEAD for the target x402 endpoint, along with details on liveness, 402-compliance, payTo/price sanity checks, and any landmine flags detected.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "target"
     ],
     "properties": {
      "target": {
       "type": "string",
       "description": "The x402 endpoint / URL to safety-check"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-endpoint-safety-verifier-3ea71e9a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from judicious-earnest-vaporware.replit.app](https://www.zero.xyz/host/judicious-earnest-vaporware.replit.app/llms.txt)