# Forest Gas Station x402 Preflight Probe

> Forest Gas Station x402 Preflight Probe is a paid API for AI agents from http--forest-gas-station-mainnet--lcjl27p8lmjs.code.run, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-02).

Performs a read-only preflight probe of an x402 PaymentRequired endpoint to inspect its payment requirements without actually executing a payment.

## Facts

- Endpoint: POST https://http--forest-gas-station-mainnet--lcjl27p8lmjs.code.run/x402/preflight?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/forest-gas-station-x402-preflight-probe-702a9711
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_iyG8LYzY1Ek_HZEJCECk8

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 forest-gas-station-x402-preflight-probe-702a9711 -d '<json body>'
```

Example prompt: Before I commit to paying, can you probe the x402 payment requirements for https://example.com/api/some-endpoint and tell me what token, amount, and network it expects?

## When to prefer this

Use this endpoint when you need to inspect the payment terms of an x402-gated API before committing funds — ideal for budget checks, integration validation, or comparing costs across multiple paid endpoints without triggering any actual payment. Prefer this over directly calling the paid endpoint when you are uncertain about the cost or token type required.

## Known failure modes

- URL does not return an x402 PaymentRequired response (not a paid endpoint)
- URL is unreachable or returns a non-402 HTTP error
- Malformed or non-compliant x402 headers on the target endpoint
- Invalid or missing URL input
- Timeout reaching the target URL

## How this service works

Read-only probe of x402 PaymentRequired requirements; does not pay. Base mainnet USDC

## Output

Returns the x402 PaymentRequired metadata for the given URL, including the required payment amount, accepted token (e.g. USDC), payment network (e.g. Ethereum mainnet or Base), and recipient payment address — without executing any payment transaction.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "url": {
   "type": "string",
   "description": "Public HTTP(S) URL to inspect, resolve, or compare."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/forest-gas-station-x402-preflight-probe-702a9711/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from http--forest-gas-station-mainnet--lcjl27p8lmjs.code.run](https://www.zero.xyz/host/http--forest-gas-station-mainnet--lcjl27p8lmjs.code.run/llms.txt)