Yr website screenshot

Yr

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.

Yr publishes 3 APIs on the APIs.io network: alerts API, data API, and metadata API. Tagged areas include Weather, Forecasts, Meteorology, Climate, and Norway.

The Yr catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

Yr’s developer surface includes documentation, engineering blog, pricing, getting-started guide, and 15 more developer resources.

🌐 Visit website 📡 Source on GitHub
45.8/100 developing ▼ -5.0 Agent 25/100 agent aware Full breakdown ↓
scored 2026-07-28 · rubric v0.6
AccessFreeOpen⚡ Free to try
5 APIs
WeatherForecastsMeteorologyClimateNorwayNordicOpen DataAviation WeatherMarine WeatherAlerts

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-28 · rubric v0.6
Composite quality — 45.8/100 · developing
Contract Quality 15.7 / 25
Developer Ergonomics 4.3 / 20
Commercial Clarity 10.5 / 20
Operational Transparency 0.7 / 13
Governance 7.0 / 12
Discoverability 7.4 / 10
Agent readiness — 25/100 · agent aware
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
MCP Server 0 / 12
Machine-Readable Auth 0 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 7 / 7
Rate-Limit Signaling 7 / 7
Typed Event Surface 0 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
A2A Agent Card 0 / 8
Dry-Run / Simulate Mode 0 / 4
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/yr-no: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 5

Individual APIs this provider publishes, each with its own machine-readable definition.

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

Pricing Plans 1

Published pricing tiers and plan structures.

Yr No Plans Pricing

1 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Yr No Rate Limits

0 limits

RATE LIMITS

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Yr No Context

21 classes · 48 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Yr API Rules

6 rules · 4 warnings 2 info

SPECTRAL

JSON Schema 2

Standalone JSON Schema definitions for this provider's data models.

MET Norway MetAlerts GeoJSON Schema

2 properties

JSON SCHEMA

MET Norway Forecast Response Schema

3 properties

JSON SCHEMA

Examples 4

Example request and response payloads for these APIs.

Yr No Compact Forecast Example

3 fields

EXAMPLE

Yr No Metalert Example

2 fields

EXAMPLE

Yr No Oceanforecast Example

3 fields

EXAMPLE

Yr No Sunrise Example

2 fields

EXAMPLE

Security Posture 2

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Yr No Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Yr No Vulnerability Disclosure

security.txt · contact published

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Yr No Agentic Access

38 operations

38 operations · 0 acting

AGENTIC

Resources

Get Started 1

Portal, sign-up, and the first successful call

GettingStarted
GettingStarted

Documentation 1

Reference material describing how the API behaves

Documentation
Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess

Build 2

SDKs, sample code, and the tooling you integrate with

GitHubOrg
GitHubOrg
 GitHubOrg
GitHubOrg

Access & Security 2

Authentication, authorization, and security posture

VulnerabilityDisclosure
VulnerabilityDisclosure
 DomainSecurity
DomainSecurity

Operate 1

Status, limits, changes, and where to get help

RateLimits
RateLimits

Commercial 6

Pricing, plans, and the legal terms of use

Pricing
Pricing
 TermsOfService
TermsOfService
 License
License
 PrivacyPolicy
PrivacyPolicy
 Plans
Plans
 FinOps
FinOps

Company 4

The organization behind the API

Website
Website
 LinkedIn
LinkedIn
 Blog
Blog
 Facebook
Facebook

Other 1

Properties that don't map to a standard resource type

X
X

Source (apis.yml)

apis.yml Raw ↑ 
aid: yr-no
name: Yr
description: 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.
type: Index
accessModel:
  pricing: free
  onboarding: open
  trial: false
  try_now: true
  public: true
  label: Free · Open access
  confidence: medium
  source:
  - plans
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/yr-no.png
url: https://raw.githubusercontent.com/api-evangelist/yr-no/refs/heads/main/apis.yml
created: '2026-06-13'
modified: '2026-06-13'
specificationVersion: '0.19'
tags:
- Weather
- Forecasts
- Meteorology
- Climate
- Norway
- Nordic
- Open Data
- Aviation Weather
- Marine Weather
- Alerts
apis:
- name: Frost API
  description: REST API for historical meteorological observation data from weather stations worldwide, maintained by MET
    Norway. Access time-series temperature, precipitation, wind, and other observations.
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://frost.met.no/howto.html
  baseURL: https://frost.met.no/
  tags:
  - Observations
  - Historical Data
  - Climate
  - Global
  properties:
  - type: Documentation
    url: https://frost.met.no/howto.html
- name: Air Quality Forecast API
  description: Forecasts of air quality for locations in Norway, including concentrations of PM2.5, PM10, NO2, and ozone,
    with daily and hourly granularity.
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://api.met.no/weatherapi/airqualityforecast/0.1/documentation
  baseURL: https://api.met.no/weatherapi/airqualityforecast/0.1/
  tags:
  - Air Quality
  - Pollution
  - Norway
  properties:
  - type: Documentation
    url: https://api.met.no/weatherapi/airqualityforecast/0.1/documentation
- aid: yr-no:yr-no-alerts-api
  name: Yr alerts API
  description: Weather alert endpoints
  humanURL: https://api.met.no/weatherapi/locationforecast/2.0/documentation
  baseURL: https://api.met.no/weatherapi/locationforecast/2.0/
  tags:
  - alerts
  properties:
  - type: OpenAPI
    url: openapi/yr-no-alerts-api-openapi.yml
  - type: Documentation
    url: https://api.met.no/weatherapi/locationforecast/2.0/documentation
  - type: Documentation
    url: https://api.met.no/weatherapi/metalerts/2.0/documentation
  - type: Documentation
    url: https://api.met.no/weatherapi/nowcast/2.0/documentation
  - type: Documentation
    url: https://api.met.no/weatherapi/sunrise/3.0/documentation
  - type: Documentation
    url: https://api.met.no/weatherapi/oceanforecast/2.0/documentation
  - type: Documentation
    url: https://api.met.no/weatherapi/radar/2.0/documentation
- aid: yr-no:yr-no-data-api
  name: Yr data API
  description: Forecast data endpoints
  humanURL: https://api.met.no/weatherapi/locationforecast/2.0/documentation
  baseURL: https://api.met.no/weatherapi/locationforecast/2.0/
  tags:
  - data
  properties:
  - type: OpenAPI
    url: openapi/yr-no-data-api-openapi.yml
  - type: Documentation
    url: https://api.met.no/weatherapi/locationforecast/2.0/documentation
  - type: Documentation
    url: https://api.met.no/weatherapi/metalerts/2.0/documentation
  - type: Documentation
    url: https://api.met.no/weatherapi/nowcast/2.0/documentation
  - type: Documentation
    url: https://api.met.no/weatherapi/sunrise/3.0/documentation
  - type: Documentation
    url: https://api.met.no/weatherapi/oceanforecast/2.0/documentation
  - type: Documentation
    url: https://api.met.no/weatherapi/radar/2.0/documentation
- aid: yr-no:yr-no-metadata-api
  name: Yr metadata API
  description: Service metadata endpoints
  humanURL: https://api.met.no/weatherapi/locationforecast/2.0/documentation
  baseURL: https://api.met.no/weatherapi/locationforecast/2.0/
  tags:
  - metadata
  properties:
  - type: OpenAPI
    url: openapi/yr-no-metadata-api-openapi.yml
  - type: Documentation
    url: https://api.met.no/weatherapi/locationforecast/2.0/documentation
  - type: Documentation
    url: https://api.met.no/weatherapi/metalerts/2.0/documentation
  - type: Documentation
    url: https://api.met.no/weatherapi/nowcast/2.0/documentation
  - type: Documentation
    url: https://api.met.no/weatherapi/sunrise/3.0/documentation
  - type: Documentation
    url: https://api.met.no/weatherapi/oceanforecast/2.0/documentation
  - type: Documentation
    url: https://api.met.no/weatherapi/radar/2.0/documentation
common:
- type: AgenticAccess
  url: agentic-access/yr-no-agentic-access.yml
- type: VulnerabilityDisclosure
  url: security/yr-no-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/yr-no-domain-security.yml
- type: Website
  url: https://www.yr.no/en
- type: Documentation
  url: https://developer.yr.no/
- type: GitHubOrg
  url: https://github.com/YR
- type: GitHubOrg
  url: https://github.com/metno
- type: LinkedIn
  url: https://www.linkedin.com/company/met-norway/
- type: Blog
  url: https://developer.yr.no/
- type: Pricing
  url: https://developer.yr.no/doc/TermsOfService/
- type: TermsOfService
  url: https://developer.yr.no/doc/TermsOfService/
- type: License
  url: https://developer.yr.no/doc/License/
- type: PrivacyPolicy
  url: https://www.met.no/en/About-us/privacy
- type: X
  url: https://twitter.com/meteorologene
- type: Facebook
  url: https://www.facebook.com/yrno-22652235447/
- type: GettingStarted
  url: https://developer.yr.no/doc/GettingStarted/
- type: Plans
  url: plans/yr-no-plans-pricing.yml
- type: RateLimits
  url: rate-limits/yr-no-rate-limits.yml
- type: FinOps
  url: finops/yr-no-finops.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com