# Yr

**Canonical:** https://apis.io/providers/yr-no/  
**Website:** https://www.yr.no/en  
**APIs profiled:** 5

Yr is a weather service from the Norwegian Meteorological Institute (MET Norway) and the Norwegian Broadcasting Corporation (NRK), providing free, high-quality weather forecasts for locations worldwide via a simple REST interface. The MET Weather API offers a comprehensive suite of products including location-based forecasts, weather alerts, nowcasts, ocean forecasts, aviation weather, sunrise and sun event calculations, radar imagery, and historical meteorological observation data. All data is open under CC BY 4.0 and requires only a User-Agent identification header — no API key or account is needed.

## Kin Score — 43.3 / 100 (developing)

Scored 2026-08-21 under rubric 0.12.0. Trend: flat (+0.0 from 43.3).

| Facet | Score |
|---|---|
| Discoverability | 74.1 |
| Contract Quality | 60.3 |
| Governance | 9.8 |
| Contract Governance | 9.8 |
| Operational Transparency | 5.3 |
| Developer Ergonomics | 23.8 |
| Commercial Clarity | 52.6 |
| Access Clarity | 52.6 |

Regulatory layer — **Government & Public Sector**: 46.3 (matched via tags).

## Agent readiness — 28.1 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | na |
| MCP Server | no |
| Auth Clarity | no |
| Idempotency | na |
| Error Semantics | no |
| OpenAPI Examples | partial |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | na |

## Access

Free · Open access — onboarding: open, pricing: free, trial: no (confidence: medium).

## APIs (5)

- **Frost API** — REST API for historical meteorological observation data from weather stations worldwide, maintained by MET Norway. Access time-series temperature, precipitation, wind, and other...
- **Air Quality Forecast API** — Forecasts of air quality for locations in Norway, including concentrations of PM2.5, PM10, NO2, and ozone, with daily and hourly granularity.
- **Yr alerts API** — Weather alert endpoints
- **Yr data API** — Forecast data endpoints
- **Yr metadata API** — Service metadata endpoints

## Agentic access (1)

- **Yr No Agentic Access** — 38 operations

## Security (2)

- **Yr No Domain Security** — TLSv1.3 · HSTS · DNSSEC · DMARC
- **Yr No Vulnerability Disclosure** — security.txt · contact published

## Plans (1)

- **Yr No Plans Pricing**

## Tags

Weather, Forecast, Meteorology, Climate, Norway, Nordic, Open Data, Aviation Weather, Marine Weather, Alerts

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/yr-no/). Scores are computed from the provider's own public artifacts under a published rubric.