# x402 Resource Preflight Check

> x402 Resource Preflight Check is a paid API for AI agents from xx402.icu, paid per call via x402, $0.01/call, status down (last checked 2026-09-15).

Probes a public x402-gated URL without payment to inspect its payment terms, validate budget fit, and return a buyer retry plan before committing funds.

## Facts

- Endpoint: GET https://xx402.icu/x402/api/x402-resource-preflight
- Price: $0.01/call
- Payment: x402
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-resource-preflight-check-223b1849
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_fhR5g6gIC40Cw5BLuz7LZ

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-resource-preflight-check-223b1849
```

Example prompt: Before I pay anything, probe this x402 URL for me — https://x402.xx402.icu/api/base-actionable-risk-feed?query=aerodrome — and tell me if it's priced under $0.05 USDC on Base mainnet using native USDC, and whether it has proper Bazaar metadata attached.

## When to prefer this

Use this endpoint when an AI agent needs to inspect an x402-gated resource before committing a payment — especially to verify price, asset, network compatibility, and Bazaar metadata presence without spending any funds. Prefer this over direct payment when budget validation or retry planning is needed first.

## Known failure modes

- Target URL is private, local, or credentialed — blocked by policy
- Target URL does not return a 402 Payment Required response
- max_price_usdc below the minimum threshold of $0.001
- Payment asset or network mismatch between expected and actual terms
- Target URL is unreachable or returns a non-HTTP error
- require_bazaar_metadata flag causes rejection when Bazaar extension is absent

## How this service works

Paid x402 buyer market scout, x402 paid resource preflight, x402 seller visibility audit, Base actionable risk feed, liquidity exit risk alerts, pool launch risk feed, stable asset risk feed, contract control event feed, protocol outflow risk feed, yield pool allocation risk feed, protocol fee quality feed, token watchlist decision packet, wallet watchlist decision packet, approval risk feed, ranked DeFi review queues with incident history, onchain risk decision packet, promoted token campaign decision packet, large transfer decision packet, token candidate screening decision radar, DEX pair anomaly decision radar, wallet safety decision packet, counterparty flow, allowance, approval exposure, DEX pair routing risk, token trade safety, token liquidity, token flow, holder concentration, contract controls, batch token screening decision packets, token diligence, and BTC15 prediction-market microstructure, execution-friction, calibration-slice, recent market tape, resolved feature sample, and threshold-pressure packets for agents and risk tools.

## Output

Returns a JSON object containing a summary, preflight decision (go/no-go), full payment terms extracted from the 402 challenge, resource metadata, a budget check comparing the resource price to the caller's max price, a buyer retry plan with actionable next steps, and source status details.

## Response schema (JSON Schema)

```json
{
 "keys": [
  "summary",
  "preflight_decision",
  "payment_terms",
  "resource_metadata",
  "budget_check",
  "buyer_retry_plan",
  "source_status",
  "sources"
 ],
 "type": "json"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-resource-preflight-check-223b1849/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from xx402.icu](https://www.zero.xyz/host/xx402.icu/llms.txt)