Forecast.Solar

Forecast.Solar provides a RESTful API delivering solar production forecasts and weather data for photovoltaic installations worldwide. Leveraging PVGIS irradiation data and multiple weather services, the service offers hourly to 15‑minute resolution forecasts, historic averages, and clear‑sky estimates. It supports professional accounts with advanced features such as time‑window calculations and chart generation, enabling developers and energy managers to integrate solar forecasting into applications and automation workflows.

Forecast.Solar publishes 8 API contracts indexed on the APIs.io network, including Chart API, Clear sky API, Forecast API, and 5 more. Tagged areas include Company, Solar, Forecast, API, and Renewable Energy.

The Forecast.Solar catalog on APIs.io includes 1 Spectral governance ruleset.

Forecast.Solar’s developer surface includes documentation, API reference, getting-started guide, support, and 12 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

38.7/100 thin Agent 32/100 agent ready Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →

1 published contract 1 Agent Skills

Company Solar ForecastAPIRenewable Energy

Kin Score

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

Composite quality — 38.7/100 · thin

Contract Quality 7.5 / 21

Developer Ergonomics 6.9 / 17

Access Clarity 5.4 / 17

Operational Transparency 4.1 / 11

Contract Governance 2.2 / 10

Discoverability 5.6 / 9

Regulatory Posture 3.5 / 15

Agent readiness — 32/100 · agent ready

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 7 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 5

Well-Known Catalog 4 / 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 0 / 3

Regulatory Posture applies to this provider. Its tags matched the Energy & Utilities 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
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)
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document

7 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 35.1 — up to +16.2 composite points
Access Clarity scores 31.6 — up to +13.7 composite points
Developer Ergonomics scores 40.5 — up to +11.9 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/forecast-solar/apis.yml: open an issue on github.com/api-evangelist/forecast-solar 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 8

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

Forecast.Solar Chart API

Chart widget (registered users)

Forecast.Solar Clear sky API

Solar production for clear sky condition (registered users)

Forecast.Solar Forecast API

Solar production forecast

Forecast.Solar History API

Historic average solar production (registered users)

Forecast.Solar Misc API

Miscellaneous functions

Forecast.Solar Professional API

Functions for Professional account holders

Forecast.Solar Public API

Public functions

Forecast.Solar Weather API

Weather forecast (registered users)

Scroll for all 8

Agent Skills 1

Packaged agent skills for driving this provider's APIs from an AI assistant.

weather-forecast

AGENT SKILL

Pricing Plans 1

Published pricing tiers and plan structures.

Forecast Solar Plans Pricing

6 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Forecast Solar Rate Limits

2 limits

RATE LIMITS

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Forecast.Solar API Rules

8 rules · 6 errors 1 warnings 1 info

SPECTRAL

OpenAPI Overlays 1

Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.

Forecast Solar Openapi Overlay

0 actions · update

GENERATED

Security Posture 2

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

Forecast Solar Authentication

1 scheme

SECURITY

Forecast Solar Domain Security

TLSv1.3 · DMARC

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Forecast Solar Scopes

OAuth 2.0 · no documented scopes

0 scopes

SCOPES

Agentic Access 1

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

Forecast Solar Agentic Access

56 operations

56 operations · 0 acting

AGENTIC

Resources

Get Started 1

Portal, sign-up, and the first successful call

GettingStarted

GettingStarted

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 5

Pagination, idempotency, versioning, errors, and events

Spectral

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

Operate 2

Status, limits, changes, and where to get help

StatusPage

StatusPage

Support

Support

Company 1

The organization behind the API

Website

Website

Other 1

Properties that don't map to a standard resource type

Hosts

Hosts

Source (apis.yml)

aid: forecast-solar
name: Forecast.Solar
image: https://forecast.solar/images/og_image.jpg
description: Forecast.Solar provides a RESTful API delivering solar production forecasts and weather data for photovoltaic
  installations worldwide. Leveraging PVGIS irradiation data and multiple weather services, the service offers hourly to 15‑minute
  resolution forecasts, historic averages, and clear‑sky estimates. It supports professional accounts with advanced features
  such as time‑window calculations and chart generation, enabling developers and energy managers to integrate solar forecasting
  into applications and automation workflows.
url: https://raw.githubusercontent.com/api-evangelist/forecast-solar/refs/heads/main/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
- Solar
- Forecast
- API
- Renewable Energy
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: AgenticAccess
  url: agentic-access/forecast-solar-agentic-access.yml
- type: Spectral
  url: rules/forecast-solar-rules.yml
- type: Vocabulary
  url: vocabulary/forecast-solar-vocabulary.yml
- type: DataModel
  url: data-model/forecast-solar-data-model.yml
- type: ErrorCatalog
  url: errors/forecast-solar-problem-types.yml
- type: Conformance
  url: conformance/forecast-solar-conformance.yml
- type: Hosts
  url: hosts/forecast-solar-hosts.yml
- type: SDKs
  url: packages/forecast-solar-packages.yml
- type: Packages
  url: packages/forecast-solar-packages.yml
- type: StatusPage
  url: https://status.forecast.solar/
- type: DomainSecurity
  url: security/forecast-solar-domain-security.yml
- type: Website
  url: https://forecast.solar/
- type: Documentation
  url: https://doc.forecast.solar/
- type: APIReference
  url: https://api.forecast.solar/swagger.yaml
- type: GettingStarted
  url: https://doc.forecast.solar/doku.php?id=start
- type: Support
  url: https://support.knutkohl.consulting/
apis:
- aid: forecast-solar:forecast-solar-chart-api
  name: Forecast.Solar Chart API
  description: Chart widget (registered users)
  humanURL: https://doc.forecast.solar/
  baseURL: https://api.forecast.solar
  tags:
  - Chart
  properties:
  - type: OpenAPI
    url: openapi/forecast-solar-chart-api-openapi.yml
- aid: forecast-solar:forecast-solar-clear-sky-api
  name: Forecast.Solar Clear sky API
  description: Solar production for clear sky condition (registered users)
  humanURL: https://doc.forecast.solar/
  baseURL: https://api.forecast.solar
  tags:
  - Clear sky
  properties:
  - type: OpenAPI
    url: openapi/forecast-solar-clear-sky-api-openapi.yml
- aid: forecast-solar:forecast-solar-forecast-api
  name: Forecast.Solar Forecast API
  description: Solar production forecast
  humanURL: https://doc.forecast.solar/
  baseURL: https://api.forecast.solar
  tags:
  - Forecast
  properties:
  - type: OpenAPI
    url: openapi/forecast-solar-forecast-api-openapi.yml
- aid: forecast-solar:forecast-solar-history-api
  name: Forecast.Solar History API
  description: Historic average solar production (registered users)
  humanURL: https://doc.forecast.solar/
  baseURL: https://api.forecast.solar
  tags:
  - History
  properties:
  - type: OpenAPI
    url: openapi/forecast-solar-history-api-openapi.yml
- aid: forecast-solar:forecast-solar-misc-api
  name: Forecast.Solar Misc API
  description: Miscellaneous functions
  humanURL: https://doc.forecast.solar/
  baseURL: https://api.forecast.solar
  tags:
  - Misc
  properties:
  - type: OpenAPI
    url: openapi/forecast-solar-misc-api-openapi.yml
- aid: forecast-solar:forecast-solar-professional-api
  name: Forecast.Solar Professional API
  description: Functions for Professional account holders
  humanURL: https://doc.forecast.solar/
  baseURL: https://api.forecast.solar
  tags:
  - Professional
  properties:
  - type: OpenAPI
    url: openapi/forecast-solar-professional-api-openapi.yml
- aid: forecast-solar:forecast-solar-public-api
  name: Forecast.Solar Public API
  description: Public functions
  humanURL: https://doc.forecast.solar/
  baseURL: https://api.forecast.solar
  tags:
  - Public
  properties:
  - type: OpenAPI
    url: openapi/forecast-solar-public-api-openapi.yml
- aid: forecast-solar:forecast-solar-weather-api
  name: Forecast.Solar Weather API
  description: Weather forecast (registered users)
  humanURL: https://doc.forecast.solar/
  baseURL: https://api.forecast.solar
  tags:
  - Weather
  properties:
  - type: OpenAPI
    url: openapi/forecast-solar-weather-api-openapi.yml
x-submission-probe: 200, 2026-10-26
x-enrichment:
  date: '2026-10-28'
  status: enriched
  artifacts_added: 15
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

Forecast.Solar API — frequently asked questions

Does Forecast.Solar have an API?

Yes. APIs.io lists 8 APIs from Forecast.Solar, including Forecast.Solar Chart API, Forecast.Solar Clear sky API and Forecast.Solar Forecast API, and 5 more.

Is there an OpenAPI specification for the Forecast.Solar API?

Yes. APIs.io indexes 8 OpenAPI specifications for Forecast.Solar, each linked for download from this page.

How do I authenticate with the Forecast.Solar API?

Forecast.Solar documents its authentication (1 scheme). The details are profiled on APIs.io as Forecast Solar Authentication.

How much does the Forecast.Solar API cost?

APIs.io lists 6 pricing plans for Forecast.Solar, with each plan's price, limits and inclusions under Pricing Plans on this page.

Is the Forecast.Solar API ready for AI agents?

Forecast.Solar has a Kin Score of 38.7 out of 100 (thin) and an Agent Readiness score of 31.6 (agent-ready), scored by API Evangelist on 2026-10-31.

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