# SFO 48-Hour Weather Delay Risk

> SFO 48-Hour Weather Delay Risk is a paid API for AI agents from x402-factory.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-15).

Returns 6-hour block weather-driven flight delay risk scores for San Francisco International Airport (SFO) over the next 48 hours.

## Facts

- Endpoint: GET https://x402-factory.com/v1/aviation/delay-risk/SFO
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sfo-48-hour-weather-delay-risk-36cd5d4f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ruI-4oMN95hgMfMDCz2Rr

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 sfo-48-hour-weather-delay-risk-36cd5d4f
```

Example prompt: What's the weather-driven delay risk at SFO over the next 48 hours — can you break it down by 6-hour windows and tell me which periods look riskiest?

## When to prefer this

Choose this endpoint when you need a ready-made, SFO-specific delay risk forecast broken into 6-hour windows with named weather drivers, rather than raw weather data that requires your own interpretation. Ideal for agents building flight-planning tools, travel assistants, or ops dashboards that need a structured risk score and verdict without additional computation. Prefer over generic weather APIs when the user cares specifically about aviation delay risk at SFO.

## Known failure modes

- Forecast data unavailable from upstream weather provider — may return empty blocks or error
- Stale forecast if upstream data has not refreshed recently
- Payment not accepted or insufficient balance — 402 response blocking access
- Airport-specific model not calibrated for unusual edge-case events outside training distribution

## How this service works

SFO weather delay risk for the next 48 hours — Weather-driven delay risk for San Francisco International (SFO) over the next 48 hours: 6-hour risk scores from forecast wind gusts, convective potential, winter and sustained precipitation, and heavy cloud cover at the field. Same shape as the generic delay-risk endpoint, bound to SFO.

## Output

Returns an array of 6-hour time blocks each containing a window_start timestamp, window_end timestamp, a risk_score (0–1 float), and an array of driver strings explaining contributing weather factors (e.g. wind gusts, convective potential, precipitation, cloud cover). Also includes a top-level verdict string summarizing overall delay risk across the 48-hour period, plus metadata.

## 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",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "required": [
      "data",
      "meta"
     ],
     "properties": {
      "data": {
       "type": "object",
       "required": [
        "blocks",
        "verdict"
       ],
       "properties": {
        "blocks": {
         "type": "array",
         "items": {
          "type": "object",
          "required": [
           "window_start",
           "window_end",
           "risk_score",
           "drivers"
          ],
          "properties": {
           "drivers": {
            "type": "array",
            "items": {
             "type": "string"
            }
           },
           "risk_score": {
            "type": "number",
            "maximum": 1,
            "minimum": 0
           },
           "window_end": {
            "type": "string"
           },
           "window_start": {
            "type": "string"
           }
          },
          "additionalProperties": false
         }
        },
        "verdict": {
         "type": "string"
        }
       },
       "additionalProperties": false
      },
      "meta": {
       "type": "object"
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/sfo-48-hour-weather-delay-risk-36cd5d4f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-factory.com](https://www.zero.xyz/host/x402-factory.com/llms.txt)