Bright Sky

Bright Sky provides a free JSON API delivering German Weather Service (DWD) open weather data. It offers endpoints for historical and forecast weather, including temperature, precipitation, wind, and solar radiation, with demo visualizations like radar and alerts. The service is open, community‑maintained, and supports easy integration via simple HTTP GET requests.

Bright Sky publishes 5 API contracts indexed on the APIs.io network, including Alerts API, Current Weather API, Internals API, and 2 more. Tagged areas include Company, Weather, API, OpenData, and JSON.

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

Bright Sky’s developer surface includes documentation, API reference, getting-started guide, and 14 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

29.9/100 thin Agent 25/100 agent aware Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →

2 published contracts

Company WeatherAPIOpenDataJSON

Kin Score

Kin Score How this is scored →
scored 2026-10-31 · rubric v0.25.0

Composite quality — 29.9/100 · thin

Contract Quality 12.0 / 21

Developer Ergonomics 6.1 / 17

Access Clarity 0.0 / 17

Operational Transparency 0.0 / 11

Contract Governance 2.2 / 10

Discoverability 5.6 / 9

Regulatory Posture 1.6 / 15

Agent readiness — 25/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 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

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) 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 could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

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/.

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Agent readiness — checks not met, largest first (exact, from this profile):

Machine-Readable Auth +10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey)
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link
Delegated User Identity +6 pts — a served discovery document listing authorization_code in grant_types_supported (served), else an oauth2 authorizationCode flow or openIdConnect declared in an OpenAPI (documented)

9 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Access Clarity scores 0.0 — up to +20.0 composite points
Operational Transparency scores 0.0 — up to +13.0 composite points
Developer Ergonomics scores 35.7 — up to +12.9 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

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 the provider profile at artifacts.apis.io/bright-sky/apis.yml: open an issue on github.com/api-evangelist/bright-sky to ask a question or point us at an artifact you publish. 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.

Bright Sky Alerts API

The Alerts API from Bright Sky — 1 operation(s) for alerts.

Bright Sky Current Weather API

The Current Weather API from Bright Sky — 1 operation(s) for current weather.

Bright Sky Internals API

The Internals API from Bright Sky — 2 operation(s) for internals.

Bright Sky Radar API

The Radar API from Bright Sky — 1 operation(s) for radar.

Bright Sky Weather API

The Weather API from Bright Sky — 1 operation(s) for weather.

Semantic Vocabularies 1

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

Bright Sky Context

16 classes · 93 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Bright Sky API Rules

14 rules · 12 errors 1 warnings 1 info

SPECTRAL

Security Posture 1

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

Bright Sky Domain Security

TLSv1.3

SECURITY

Agentic Access 1

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

Bright Sky Agentic Access

6 operations

6 operations · 0 acting

AGENTIC

Resources

Get Started 2

Portal, sign-up, and the first successful call

GettingStarted

GettingStarted

Demo

Demo

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

DataModel

ErrorCatalog

Conformance

Build 2

SDKs, sample code, and the tooling you integrate with

SDKs

SDKs

Packages

Packages

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Company 1

The organization behind the API

Website

Website

Other 2

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: bright-sky
name: Bright Sky
description: Bright Sky provides a free JSON API delivering German Weather Service (DWD) open weather data. It offers endpoints
  for historical and forecast weather, including temperature, precipitation, wind, and solar radiation, with demo visualizations
  like radar and alerts. The service is open, community‑maintained, and supports easy integration via simple HTTP GET requests.
url: https://artifacts.apis.io/bright-sky/apis.yml
x-type: company
x-source: harvest:new-submission
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-28 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-28'
modified: '2026-10-28'
tags:
- Company
- Weather
- API
- OpenData
- JSON
image: https://brightsky.dev/logo.png
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: AgenticAccess
  url: agentic-access/bright-sky-agentic-access.yml
- type: Spectral
  url: rules/bright-sky-rules.yml
- type: JSONLD
  url: json-ld/bright-sky-context.jsonld
- type: Vocabulary
  url: vocabulary/bright-sky-vocabulary.yml
- type: DataModel
  url: data-model/bright-sky-data-model.yml
- type: ErrorCatalog
  url: errors/bright-sky-problem-types.yml
- type: Conformance
  url: conformance/bright-sky-conformance.yml
- type: Hosts
  url: hosts/bright-sky-hosts.yml
- type: Vendors
  url: vendors/bright-sky-vendors.yml
- type: SDKs
  url: packages/bright-sky-packages.yml
- type: Packages
  url: packages/bright-sky-packages.yml
- type: DomainSecurity
  url: security/bright-sky-domain-security.yml
- type: Website
  url: https://brightsky.dev/
- type: Documentation
  url: https://brightsky.dev/docs/
- type: APIReference
  url: https://api.brightsky.dev/
- type: GettingStarted
  url: https://brightsky.dev/docs/#getting-started
- type: Demo
  url: https://brightsky.dev/demo/
apis:
- aid: bright-sky:bright-sky-alerts-api
  name: Bright Sky Alerts API
  description: The Alerts API from Bright Sky — 1 operation(s) for alerts.
  humanURL: https://brightsky.dev/docs/
  baseURL: https://api.brightsky.dev
  tags:
  - Alerts
  properties:
  - type: OpenAPI
    url: openapi/bright-sky-alerts-api-openapi.yml
- aid: bright-sky:bright-sky-current-weather-api
  name: Bright Sky Current Weather API
  description: The Current Weather API from Bright Sky — 1 operation(s) for current weather.
  humanURL: https://brightsky.dev/docs/
  baseURL: https://api.brightsky.dev
  tags:
  - Current Weather
  properties:
  - type: OpenAPI
    url: openapi/bright-sky-current-weather-api-openapi.yml
- aid: bright-sky:bright-sky-internals-api
  name: Bright Sky Internals API
  description: The Internals API from Bright Sky — 2 operation(s) for internals.
  humanURL: https://brightsky.dev/docs/
  baseURL: https://api.brightsky.dev
  tags:
  - Internals
  properties:
  - type: OpenAPI
    url: openapi/bright-sky-internals-api-openapi.yml
- aid: bright-sky:bright-sky-radar-api
  name: Bright Sky Radar API
  description: The Radar API from Bright Sky — 1 operation(s) for radar.
  humanURL: https://brightsky.dev/docs/
  baseURL: https://api.brightsky.dev
  tags:
  - Radar
  properties:
  - type: OpenAPI
    url: openapi/bright-sky-radar-api-openapi.yml
- aid: bright-sky:bright-sky-weather-api
  name: Bright Sky Weather API
  description: The Weather API from Bright Sky — 1 operation(s) for weather.
  humanURL: https://brightsky.dev/docs/
  baseURL: https://api.brightsky.dev
  tags:
  - Weather
  properties:
  - type: OpenAPI
    url: openapi/bright-sky-weather-api-openapi.yml
x-submission-probe: 200, 2026-10-26
x-enrichment:
  date: '2026-10-28'
  status: enriched
  artifacts_added: 17
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

Bright Sky API — frequently asked questions

Does Bright Sky have an API?

Yes. APIs.io lists 5 APIs from Bright Sky, including Bright Sky Alerts API, Bright Sky Current Weather API and Bright Sky Internals API, and 2 more.

Is there an OpenAPI specification for the Bright Sky API?

Yes. APIs.io indexes 5 OpenAPI specifications for Bright Sky, each linked for download from this page.

Is the Bright Sky API ready for AI agents?

Bright Sky has a Kin Score of 29.9 out of 100 (thin) and an Agent Readiness score of 25.2 (agent-aware), scored by API Evangelist on 2026-10-31.

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