Dark Sky

Dark Sky is a hyperlocal weather forecast REST API (now part of Apple) that provided minute-by-minute precipitation forecasts, hourly weather conditions, and multi-day outlooks powered by machine-learning models. The API delivered real-time and historical weather data for any latitude and longitude worldwide, including current conditions, 60-minute minutely precipitation intensity, 48-hour hourly forecasts, and 7-day daily summaries. It was acquired by Apple in March 2020; new developer signups closed immediately, and the API was permanently shut down on March 31, 2023. Apple's WeatherKit REST API is the successor service.

Dark Sky publishes 2 API contracts indexed on the APIs.io network: Forecast API and Time Machine API. Tagged areas include Weather, Forecast, Hyperlocal, Precipitation, and Machine Learning.

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

Dark Sky’s developer surface includes authentication, documentation, engineering blog, pricing, and 10 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

0.0/100 minimal ▬ flat Agent 0/100 human only Front door AI 1/6 silent Heartbeat 0/100 dormant saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessFreeSelf serve⚡ Free to try

1 published contract

Weather Forecast Hyperlocal Precipitation Machine Learning REST Apple Defunct

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 0.0/100 · minimal

Contract Quality 0.0 / 21

Developer Ergonomics 0.0 / 17

Access Clarity 0.0 / 17

Operational Transparency 0.0 / 11

Contract Governance 0.0 / 10

Discoverability 0.0 / 9

Regulatory Posture 2.3 / 15

Agent readiness — 0/100 · human only

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 6 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 9 / 9

Stable Error Semantics 8 / 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

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

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 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/.

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

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document
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)
Typed Event Surface +6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks
Agent Skills +5 pts — skills artifact present, graded by who authored it

4 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 0.0 — up to +25.0 composite points
Developer Ergonomics scores 0.0 — up to +20.0 composite points
Access Clarity scores 0.0 — up to +20.0 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/dark-sky/apis.yml: open an issue on github.com/api-evangelist/dark-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 →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Apple Accessory & Device Ecosystem (MFi, Matter, Apple partners)	builds-on	17.2 (thin)	-	-
Configuration-Management Content Registries (Ansible Galaxy, Chef Supermarket)	builds-on	17.2 (thin)	-	-

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

Standards implemented 2

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

REST

tagged — the provider's own APIs.json carries the standard as a tag; implementation not verified

OpenAPI

measured — observed by APIs.io (published)

APIs 2

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

Dark Sky Forecast API

Current and forecast weather data for a given location

Dark Sky Time Machine API

Historical or future weather data for a specific point in time

Open Collections 2

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

Dark Sky Forecast API

OPEN COLLECTION

Dark Sky Forecast Time Machine API

OPEN COLLECTION

Dark Sky API pricing

Not yet checked against Dark Sky's own pricing page. Compiled by API Evangelist; confirm before you rely on a figure.

Plan	Price
Free Tier	—
Pay As You Go	—

Plan details, limits and sources →

Rate limits

Free Daily Calls: 1000 daily
No Hard Request Cap: unlimited daily

Compiled by API Evangelist, not yet checked against Dark Sky's documentation. Rate-limit details →

Pricing Plans 1

Published pricing tiers and plan structures.

Dark Sky Plans Pricing

2 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Dark Sky Rate Limits

2 limits

RATE LIMITS

Service Levels 1

Uptime the provider promises or reports, as SLA4OAI. Read from its own pages; APIs.io runs no monitors.

Dark Sky

SLA

FinOps 1

Cost, billing, and metering signals for API financial operations.

Dark Sky Finops

FINOPS

Semantic Vocabularies 1

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

Dark Sky Context

0 classes · 46 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Dark Sky — jsonschema rules

6 rules · 4 warnings 2 info

SPECTRAL

JSON Schema 1

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

Dark Sky Forecast Response

10 properties

JSON SCHEMA

Examples 2

Example request and response payloads for these APIs.

Forecast Response

10 fields

EXAMPLE

Time Machine Response

8 fields

EXAMPLE

Security Posture 2

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

Dark Sky Authentication

apiKey · 1 scheme

SECURITY

Dark Sky Domain Security

TLSv1.3

SECURITY

Agentic Access 1

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

Dark Sky Agentic Access

2 operations

2 operations · 0 acting

AGENTIC

Resources

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 1

SDKs, sample code, and the tooling you integrate with

GitHubOrg

GitHubOrg

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 2

Status, limits, changes, and where to get help

StatusPage

StatusPage

RateLimits

RateLimits

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

Plans

Plans

FinOps

FinOps

Company 3

The organization behind the API

Website

Website

LinkedIn

Blog

Blog

Other 1

Properties that don't map to a standard resource type

Source (apis.yml)

aid: dark-sky
name: Dark Sky
description: 'Dark Sky is a hyperlocal weather forecast REST API (now part of Apple) that provided minute-by-minute precipitation
  forecasts, hourly weather conditions, and multi-day outlooks powered by machine-learning models. The API delivered real-time
  and historical weather data for any latitude and longitude worldwide, including current conditions, 60-minute minutely precipitation
  intensity, 48-hour hourly forecasts, and 7-day daily summaries. It was acquired by Apple in March 2020; new developer signups
  closed immediately, and the API was permanently shut down on March 31, 2023. Apple''s WeatherKit REST API is the successor
  service.

  '
x-status: defunct
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: free
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Free · Self-serve signup
  confidence: medium
  source:
  - plans
  - authentication
  - security
  - url: https://darksky.net
    status: 301
    note: declared website redirects to https://support.apple.com/en-us/102594 — a different registrable domain (darksky.net
      -> apple.com), possible rename or acquisition (probed 2026-09-03, roadmap#169)
  generated: '2026-11-06'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/dark-sky.png
url: https://raw.githubusercontent.com/api-evangelist/dark-sky/refs/heads/main/apis.yml
created: '2026-06-13'
modified: '2026-06-13'
specificationVersion: '0.23'
tags:
- Weather
- Forecast
- Hyperlocal
- Precipitation
- Machine Learning
- REST
- Apple
- Defunct
tags_raw:
- Weather
- Forecast
- Hyperlocal
- Precipitation
- Machine Learning
- REST
- Apple
- Machine-Learning
- Defunct
apis:
- aid: dark-sky:dark-sky-forecast-api
  name: Dark Sky Forecast API
  description: Current and forecast weather data for a given location
  humanURL: https://darksky.net/dev/docs
  baseURL: https://api.darksky.net
  tags:
  - Forecast
  properties:
  - type: OpenAPI
    url: openapi/dark-sky-forecast-api-openapi.yml
  - type: Documentation
    url: https://darksky.net/dev/docs
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/dark-sky/refs/heads/main/json-schema/dark-sky-forecast-response.json
  - type: Examples
    url: https://raw.githubusercontent.com/api-evangelist/dark-sky/refs/heads/main/examples/forecast-response.json
  - type: Examples
    url: https://raw.githubusercontent.com/api-evangelist/dark-sky/refs/heads/main/examples/time-machine-response.json
  - type: Vocabulary
    url: https://raw.githubusercontent.com/api-evangelist/dark-sky/refs/heads/main/vocabulary/dark-sky-vocabulary.json
  - type: JSONLDContext
    url: https://raw.githubusercontent.com/api-evangelist/dark-sky/refs/heads/main/json-ld/dark-sky-context.jsonld
- aid: dark-sky:dark-sky-time-machine-api
  name: Dark Sky Time Machine API
  description: Historical or future weather data for a specific point in time
  humanURL: https://darksky.net/dev/docs
  baseURL: https://api.darksky.net
  tags:
  - Time Machine
  properties:
  - type: OpenAPI
    url: openapi/dark-sky-time-machine-api-openapi.yml
  - type: Documentation
    url: https://darksky.net/dev/docs
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/dark-sky/refs/heads/main/json-schema/dark-sky-forecast-response.json
  - type: Examples
    url: https://raw.githubusercontent.com/api-evangelist/dark-sky/refs/heads/main/examples/forecast-response.json
  - type: Examples
    url: https://raw.githubusercontent.com/api-evangelist/dark-sky/refs/heads/main/examples/time-machine-response.json
  - type: Vocabulary
    url: https://raw.githubusercontent.com/api-evangelist/dark-sky/refs/heads/main/vocabulary/dark-sky-vocabulary.json
  - type: JSONLDContext
    url: https://raw.githubusercontent.com/api-evangelist/dark-sky/refs/heads/main/json-ld/dark-sky-context.jsonld
common:
- type: AgenticAccess
  url: agentic-access/dark-sky-agentic-access.yml
- type: DomainSecurity
  url: security/dark-sky-domain-security.yml
- type: Authentication
  url: authentication/dark-sky-authentication.yml
- type: Website
  url: https://darksky.net
- type: Documentation
  url: https://darksky.net/dev/docs
- type: GitHubOrg
  url: https://github.com/darkskyapp
- type: LinkedIn
  url: https://www.linkedin.com/company/dark-sky
- type: Blog
  url: https://blog.darksky.net
- type: Pricing
  url: https://darksky.net/dev
- type: StatusPage
  url: https://darksky.net/dev/console
- type: X
  url: https://x.com/darkskyapp
- type: Plans
  url: plans/dark-sky-plans-pricing.yml
- type: RateLimits
  url: rate-limits/dark-sky-rate-limits.yml
- type: FinOps
  url: finops/dark-sky-finops.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

Dark Sky API — frequently asked questions

Does Dark Sky have an API?

Yes. APIs.io lists 2 APIs from Dark Sky, including Dark Sky Forecast API and Dark Sky Time Machine API.

Is there an OpenAPI specification for the Dark Sky API?

Yes. APIs.io indexes 2 OpenAPI specifications for Dark Sky, each linked for download from this page.

How do I authenticate with the Dark Sky API?

Dark Sky uses bearer-token authentication (apiKey · 1 scheme). The details are profiled on APIs.io as Dark Sky Authentication.

How much does the Dark Sky API cost?

APIs.io lists 2 pricing plans for Dark Sky, with each plan's price, limits and inclusions under Pricing on this page.

Is the Dark Sky API ready for AI agents?

Dark Sky has a Kin Score of 0.0 out of 100 (minimal) and an Agent Readiness score of 0.0 (human-only), scored by API Evangelist on 2026-11-06.

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