# 2s SIGMET Aviation Hazard Advisories

> 2s SIGMET Aviation Hazard Advisories is a paid API for AI agents from 2s.io, paid per call via x402, $0.00108/call, status unknown (last checked 2026-09-14).

Fetches active SIGMETs (significant meteorological advisories) from NOAA's Aviation Weather Center, filtered by hazard type and time window

## Facts

- Endpoint: GET https://2s.io/api/aviation/sigmet
- Price: $0.00108/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/2s-sigmet-aviation-hazard-advisories-54633653
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_outOO3jatcN1-JLPmec3_

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 2s-sigmet-aviation-hazard-advisories-54633653
```

Example prompt: Pull the latest SIGMETs from the past 6 hours, up to 30 advisories, and filter for just convective hazards — I need to know what's active right now for flight planning.

## When to prefer this

Use this endpoint when an AI agent needs real-time, ground-truth SIGMET data sourced directly from NOAA for aviation safety, flight planning, or meteorological monitoring. Prefer over manual weather lookups or general weather APIs that don't surface structured SIGMET data with altitude, movement, and hazard classification.

## Known failure modes

- Invalid hazard filter string returns empty or error response
- hours parameter out of 1–24 range may be rejected or clamped
- limit parameter out of 1–50 range may be rejected
- No active SIGMETs matching filter returns empty items array
- NOAA upstream outage causes error or stale data
- Payment failure (402) if USDC balance insufficient

## How this service works

Active in-flight weather hazard advisories (SIGMETs and AIRMETs) from the NOAA Aviation Weather Center. Returns current advisories over a lookback window (1-24h), optionally filtered by hazard (CONVECTIVE, TURB turbulence, ICE icing, IFR, MTN OBSCN mountain obscuration, ASH volcanic ash). Each advisory carries the issuing office, type (SIGMET/AIRMET/OUTLOOK), hazard, severity, valid-from/to times, affected altitude band (feet MSL), movement (direction/speed), and the raw text bulletin. Keyless, public-domain (NOAA). The active-hazard layer aviation agents need — distinct from aviation.metar (station conditions) and aviation.taf (forecasts). Not for navigation.

## Output

Returns a JSON array of active SIGMET advisories, each with raw text, hazard type, ICAO region ID, validity start/end times, altitude bounds (low and high in feet), movement direction (degrees) and speed (knots), and severity. Also includes total count and NOAA source 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",
    "queryParams"
   ],
   "properties": {
    "type": {
     "const": "http"
    },
    "method": {
     "const": "GET"
    },
    "queryParams": {
     "properties": {
      "hours": {
       "type": "integer",
       "description": "Lookback window in hours (1-24, default 3)."
      },
      "limit": {
       "type": "integer",
       "description": "Max advisories (1-50, default 20)."
      },
      "hazard": {
       "type": "string",
       "description": "Hazard filter: CONVECTIVE, TURB, ICE, IFR, MTN OBSCN, ASH."
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/2s-sigmet-aviation-hazard-advisories-54633653/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from 2s.io](https://www.zero.xyz/host/2s.io/llms.txt)