# Longwatch One-Shot Check

> Longwatch One-Shot Check is a paid API for AI agents from longwatch.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-13).

Performs a single, immediate lookup of a URL, RSS feed, crypto price, or SEC filing without creating a persistent watch.

## Facts

- Endpoint: GET https://longwatch.dev/check?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/longwatch-one-shot-check-528f5045
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_JSJXs5LdOG6hYUU_IWX0K

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 longwatch-one-shot-check-528f5045
```

Example prompt: Do a one-shot check on NVIDIA's latest SEC filings — Form 4 and 8-K — using their ticker NVDA, and tell me who bought or sold shares recently.

## When to prefer this

Choose this endpoint when you need a single, immediate snapshot of a source — a webpage, RSS feed, crypto price, or SEC filing — without creating any persistent watch or subscription. Ideal for one-time checks, ad-hoc queries, or when you want to inspect current data before deciding whether to set up ongoing monitoring via POST /watches. Especially valuable for SEC EDGAR data because it automatically decodes 8-K item codes and parses Form 4 insider trades into structured, human-readable summaries.

## Known failure modes

- Invalid or unreachable URL returns an error or empty result
- Unknown CoinGecko coin ID returns a lookup failure
- Invalid SEC ticker or CIK returns no filings found
- Missing required 'type' query parameter causes a 400-level error
- Payment not provided or insufficient USDC causes a 402 Payment Required response
- RSS feed URL that is malformed or not a valid feed returns parse error

## How this service works

This-session snapshot only — no watch, no cursor. Use when you will not come back. Required by type: url/rss/x402 need url; price needs coin plus above, below, or move_pct_24h; edgar needs ticker or cik. 8-K items are decoded, Form 4 trades parsed, and x402 probes validate the unpaid 402 challenge without sending payment. If the job spans runs, create_watch instead and persist watch_id + key.

## Output

Returns a JSON object with a 'type' field matching the requested watch type, and a 'result' object containing: for 'edgar' — company name and an array of filings with form type and a plain-English summary (e.g. who bought/sold, how many shares, whether scheduled); for 'price' — current USD price; for 'url' — current page text; for 'rss' — latest feed items.

## 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",
     "oneOf": [
      {
       "title": "Web page",
       "required": [
        "type",
        "url"
       ],
       "properties": {
        "type": {
         "const": "url"
        }
       }
      },
      {
       "title": "RSS feed",
       "required": [
        "type",
        "url"
       ],
       "properties": {
        "type": {
         "const": "rss"
        }
       }
      },
      {
       "anyOf": [
        {
         "required": [
          "above"
         ]
        },
        {
         "required": [
          "below"
         ]
        },
        {
         "required": [
          "move_pct_24h"
         ]
        }
       ],
       "title": "Crypto price",
       "required": [
        "type",
        "coin"
       ],
       "properties": {
        "type": {
         "const": "price"
        }
       }
      },
      {
       "anyOf": [
        {
         "required": [
          "ticker"
         ]
        },
        {
         "required": [
          "cik"
         ]
        }
       ],
       "title": "SEC EDGAR filings",
       "required": [
        "type"
       ],
       "properties": {
        "type": {
         "const": "edgar"
        }
       }
      },
      {
       "title": "x402 endpoint",
       "required": [
        "type",
        "url"
       ],
       "properties": {
        "type": {
         "const": "x402"
        }
       }
      }
     ],
     "required": [
      "type"
     ],
     "properties": {
      "cik": {
       "type": "number",
       "description": "edgar: SEC CIK, alternative to ticker"
      },
      "url": {
       "type": "string",
       "description": "url|rss|x402: public page, feed, or payment endpoint URL"
      },
      "body": {
       "type": "object",
       "description": "x402: optional qualified JSON request body",
       "additionalProperties": true
      },
      "coin": {
       "type": "string",
       "description": "price: CoinGecko id, e.g. bitcoin"
      },
      "type": {
       "enum": [
        "url",
        "rss",
        "price",
        "edgar",
        "x402"

… (truncated)
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "type": "edgar",
  "result": {
   "company": "NVIDIA CORP",
   "filings": [
    {
     "form": "4",
     "summary": "CFO bought 10,000 shares"
    }
   ]
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/longwatch-one-shot-check-528f5045/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from longwatch.dev](https://www.zero.xyz/host/longwatch.dev/llms.txt)