# x402 Batch Preflight Checker

> x402 Batch Preflight Checker is a paid API for AI agents from bj7e26lfpo4fthvr35hczdipby.srv.us, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-15).

Checks up to 20 x402-gated HTTPS endpoints in one call to determine which are live, paid, and safe to call — returning per-URL verdicts, prices, and a batch-level summary.

## Facts

- Endpoint: GET https://bj7e26lfpo4fthvr35hczdipby.srv.us/v1/x402-batch-preflight
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-batch-preflight-checker-86800e58
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap__zZHneKym0vaOaMeCRmBF

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-batch-preflight-checker-86800e58
```

Example prompt: Before we call any of these x402 endpoints, can you batch-preflight all of them — https://a.example/one, https://b.example/two, https://c.example/three — and tell me which ones are live, what they cost, and which are safe to pay?

## When to prefer this

Use this endpoint when you need to screen multiple x402-gated URLs in one round-trip before committing to pay for any of them. It is purpose-built for agent pipelines that need to validate liveness and price across a batch of endpoints simultaneously, avoiding wasted spend on dead or overpriced APIs. Prefer this over single-URL preflight tools when you have 2–20 endpoints to check at once.

## Known failure modes

- Malformed or non-HTTPS URLs in the comma-separated list cause individual verdict failures
- More than 20 URLs submitted — likely rejected or truncated
- Endpoint itself is unreachable — returns error verdict for that URL
- Network timeouts on upstream checks may cause partial results
- Missing required 'urls' query parameter returns validation error

## How this service works

Seven account-free paid tools for source integrity, x402 catalog search, preflight, liveness, routing, price drift, and batch verification.

## Output

Returns a JSON object with a results array (one entry per URL) containing the URL, a verdict string (e.g. 'live_paid', 'gone'), the price in USDC if applicable, and a safe_to_pay boolean. Also includes top-level counts of how many URLs are safe or unsafe, a total_price_if_all_called_usdc sum, and a batchVersion field.

## 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": [
      "urls"
     ],
     "properties": {
      "urls": {
       "type": "string",
       "description": "Comma-separated HTTPS endpoints, up to 20"
      }
     },
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "unsafe": 1,
  "results": [
   {
    "url": "https://a.example/one",
    "verdict": "live_paid",
    "price_usdc": 1.25,
    "safe_to_pay": true
   },
   {
    "url": "https://b.example/two",
    "verdict": "gone",
    "price_usdc": null,
    "safe_to_pay": false
   }
  ],
  "requested": 2,
  "safe_to_pay": 1,
  "batchVersion": "1.0",
  "total_price_if_all_called_usdc": 1.25
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-batch-preflight-checker-86800e58/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from bj7e26lfpo4fthvr35hczdipby.srv.us](https://www.zero.xyz/host/bj7e26lfpo4fthvr35hczdipby.srv.us/llms.txt)