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, Forecast, 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

42.9/100 developing ▬ flat Agent 23/100 agent aware saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

AccessFreeOpen⚡ Free to try

5 APIs

Weather Forecast Meteorology Climate Norway Nordic Open Data Aviation WeatherMarine WeatherAlerts

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 42.9/100 · developing

Contract Quality 12.5 / 21

Developer Ergonomics 4.0 / 17

Access Clarity 8.9 / 17

Operational Transparency 0.6 / 11

Contract Governance 1.0 / 10

Discoverability 6.3 / 9

Regulatory Posture 6.9 / 15

Agent readiness — 23/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 6 / 6

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 9 / 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 4 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Regulatory Posture applies to this provider. Its tags matched the Government & Public Sector regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics does not apply to this provider. The published contracts declare no write operations, and a read-only API cannot create-or-update. The facet is excluded from this provider's denominator entirely — not scored zero. A reference or data API is not deficient for being unable to upsert.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. 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. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

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

Open Collections 4

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

API Collection

OPEN COLLECTION

Locationforecast alerts API

OPEN COLLECTION

Locationforecast alerts data API

OPEN COLLECTION

Locationforecast alerts metadata API

OPEN COLLECTION

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

TermsOfService

License

PrivacyPolicy

Plans

FinOps

Company 4

The organization behind the API

Website

Website

LinkedIn

Blog

Blog

Facebook

Facebook

Other 1

Properties that don't map to a standard resource type

Source (apis.yml)

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
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
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: '0.23'
tags:
- Weather
- Forecast
- Meteorology
- Climate
- Norway
- Nordic
- Open Data
- Aviation Weather
- Marine Weather
- Alerts
tags_raw:
- 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
  tags_raw:
  - 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
  tags_raw:
  - 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
  tags_raw:
  - 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

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