# Foundry NWS Weather Alert Window Composite > Foundry NWS Weather Alert Window Composite is a paid API for AI agents from foundry-par007-machine-revenue-mainnet.inference-chip-index.workers.dev, paid per call via x402, $0.008/call, status unknown (last checked 2026-09-14). Returns NWS hourly forecast periods and active alerts for a US location within a specified future time window, filtered by user-defined weather thresholds (wind, temperature, precipitation). ## Facts - Endpoint: POST https://foundry-par007-machine-revenue-mainnet.inference-chip-index.workers.dev/v2/official/nws-weather-alert-window-composite - Price: $0.008/call - Payment: x402 - Status: unknown - Last checked: 2026-09-14 - Activations on Zero: 0 - Tags: x402 - Canonical page: https://www.zero.xyz/c/foundry-nws-weather-alert-window-composite-fe4ff8d3 - Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_-6dFuQ_E9wR8WaYa_WYtG 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 foundry-nws-weather-alert-window-composite-fe4ff8d3 -d '' ``` Example prompt: Check the NWS weather alert window for latitude 39.7456, longitude -97.0892 over the next 12 hours starting now, and flag any periods where wind exceeds 25 kph, temperature goes above 30°C or below 5°C, or precipitation probability is over 30%. ## When to prefer this Choose this endpoint when you need a composite view combining NWS active alerts AND hourly forecast data for a US coordinate, filtered by specific numeric thresholds, with explicit source provenance and JSON contracts. Prefer it over raw NWS API calls when you need threshold-based window detection (safe/unsafe periods) in a single pay-per-request call with normalized output. Not suitable for non-US locations or when you need real-time sensor data rather than NWS model forecasts. ## Known failure modes - Coordinates outside US NWS coverage area (e.g. non-US lat/lon) may return no forecast periods or empty alerts - NWS upstream API unavailability may cause partial or failed responses - duration_hours + start_hours_from_now exceeding NWS forecast horizon returns incomplete coverage (forecast_coverage_complete: false) - Invalid latitude/longitude values (out of -90/90 or -180/180 range) rejected by schema validation - No alerts does not guarantee safe conditions — limitations array explicitly notes this ## How this service works Pay-per-request evidence and data tools: CSV validation and reconciliation, DNS/email configuration evidence, and bounded official weather, earthquake, vehicle, company and study records. Exact USDC prices, explicit JSON contracts and source provenance. No mailbox, ownership, medical or safety guarantees. ## Output A JSON object containing: the joined forecast windows with weather status and overlapping NWS alert IDs; the list of current active NWS alerts; individual hourly forecast periods; applied threshold values; the requested time window boundaries; source URLs with retrieval timestamps and cache ages; attribution and terms URL; and flags for truncation and forecast coverage completeness. ## Request schema (JSON Schema) ```json { "type": "object", "properties": { "latitude": { "type": "number", "maximum": 90, "minimum": -90 }, "longitude": { "type": "number", "maximum": 180, "minimum": -180 }, "max_wind_kph": { "type": "number", "maximum": 400, "minimum": 0 }, "duration_hours": { "type": "integer", "default": 12, "maximum": 24, "minimum": 1 }, "max_temperature_c": { "type": "number", "maximum": 60, "minimum": -100 }, "min_temperature_c": { "type": "number", "maximum": 60, "minimum": -100 }, "start_hours_from_now": { "type": "integer", "default": 0, "maximum": 120, "minimum": 0 }, "max_precipitation_probability": { "type": "number", "maximum": 100, "minimum": 0 } } } ``` ## Response schema (JSON Schema) ```json { "type": "json", "example": { "route": "nws-weather-alert-window-composite", "result": { "sources": [ { "url": "https://api.weather.gov/gridpoints/TOP/31,80/forecast/hourly", "kind": "HOURLY_FORECAST", "updated_at": null, "retrieved_at": "2026-09-07T00:00:00Z", "cache_age_seconds": 0 }, { "url": "https://api.weather.gov/alerts?active=true&point=39.7456%2C-97.0892&limit=100", "kind": "CURRENT_POINT_ALERTS", "updated_at": null, "retrieved_at": "2026-09-07T00:00:00Z", "cache_age_seconds": 0 } ], "location": { "latitude": 39.7456, "longitude": -97.0892 }, "terms_url": "https://www.weather.gov/disclaimer", "thresholds": { "max_wind_kph": 25, "max_temperature_c": 30, "min_temperature_c": 5, "max_precipitation_probability": 30 }, "alert_scope": "CURRENT_ACTIVE_ONLY", "attribution": "NOAA / National Weather Service; normalized by Foundry; no endorsement", "limitations": [ "Synthetic example only. No alerts or matching weather does not prove safe conditions." ], "current_alerts": [], "joined_windows": [ { "end": "2026-09-07T12:00:00Z", "start": "2026-09-07T00:00:00Z", "weather_status": "UNKNOWN", "overlapping_alert_ids": [] } ], "weather_periods": [], "alerts_truncated": false, "requested_window": { "end": "2026-09-07T12:00:00Z", "start": "2026-09-07T00:00:00Z" }, "timing_unknown_alert_ids": [], "forecast_coverage_complete": false }, "observed_at": "2026-09-06T00:00:00Z" } } ``` ## More - Live health (JSON, refreshed every minute): https://www.zero.xyz/c/foundry-nws-weather-alert-window-composite-fe4ff8d3/health.json - [Zero catalog index](https://www.zero.xyz/llms.txt) - [Other services from foundry-par007-machine-revenue-mainnet.inference-chip-index.workers.dev](https://www.zero.xyz/host/foundry-par007-machine-revenue-mainnet.inference-chip-index.workers.dev/llms.txt)