# Neuroterminal Fetch Preflight

> Neuroterminal Fetch Preflight is a paid API for AI agents from api.neuroterminal.xyz, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).

Pre-checks a URL before fetching it, returning accessibility metadata such as robots.txt permissions, paywall detection, JS rendering requirements, and HTTP status.

## Facts

- Endpoint: GET https://api.neuroterminal.xyz/v1/fetch-preflight
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/neuroterminal-fetch-preflight-83242f5c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_UoTX6RByl-eIM1yzQucEy

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 neuroterminal-fetch-preflight-83242f5c
```

Example prompt: Before you try to fetch https://www.nytimes.com/2024/01/15/tech/ai.html, can you do a preflight check to see if it's blocked for AI bots, behind a paywall, or requires JavaScript rendering?

## When to prefer this

Use this endpoint when you need a lightweight, cheap ($0.01) pre-check before committing to a more expensive or complex web fetch operation. It is ideal for filtering out paywalled, bot-blocked, or JS-heavy URLs before sending them to a full rendering or scraping pipeline. Prefer this over full-fetch endpoints when you only need access metadata rather than page content.

## Known failure modes

- URL is unreachable or returns a network error — blocked flag may be true with a reason
- Malformed or missing URL parameter — returns a validation error
- robots.txt is absent or unparseable — wildcard permissions may default to true
- JavaScript detection may produce false positives for complex SPAs
- Paywall detection may not catch soft paywalls or metered access

## How this service works

Paid HTTP endpoints for AI agents, settled in USDC on Base via the x402 protocol. No account, no API key — pay per call.

## Output

Returns a JSON object indicating: whether the URL returns a 2xx HTTP status, whether AI bots (GPTBot, ClaudeBot, and wildcards) are permitted by robots.txt, whether the page is behind a paywall, whether JavaScript is required to render the page, whether the page is blocked, and if blocked, the reason.

## 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": [
      "url"
     ],
     "properties": {
      "url": {
       "type": "string",
       "description": "URL you intend to fetch"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "robots": {
   "*": true,
   "GPTBot": false,
   "ClaudeBot": false
  },
  "status": 200,
  "blocked": false,
  "paywall": true,
  "jsRequired": true,
  "blockedReason": null
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/neuroterminal-fetch-preflight-83242f5c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.neuroterminal.xyz](https://www.zero.xyz/host/api.neuroterminal.xyz/llms.txt)