Carbon Intensity API website screenshot

Carbon Intensity API

The Carbon Intensity API is the official carbon intensity forecasting service for Great Britain, developed by the National Energy System Operator (NESO) in partnership with EDF, the University of Oxford, and WWF. It provides real-time, forecast, and historical carbon intensity data alongside generation mix information for GB electricity, with 96+ hour forecasts and 30-minute temporal resolution across 14 regional DNO boundaries. The API is publicly accessible with no authentication required and is licensed under CC BY 4.0.

Carbon Intensity API publishes 5 APIs on the APIs.io network, including Factors API, Generation Mix API, National Intensity API, and 2 more. Tagged areas include Carbon Intensity, Environment, Energy, Electricity, and Climate.

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

Carbon Intensity API’s developer surface includes documentation and 9 more developer resources.

🌐 Visit website 📡 Source on GitHub
40.8/100 developing ▬ flat Agent 23/100 agent aware Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0
AccessFreeOpen⚡ Free to try
1 APIs
Carbon IntensityEnvironmentEnergyElectricityClimateGreat BritainNational Grid

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0
Composite quality — 40.8/100 · developing
Contract Quality 14.1 / 21
Developer Ergonomics 1.6 / 17
Access Clarity 6.7 / 17
Operational Transparency 3.8 / 11
Contract Governance 2.6 / 10
Discoverability 5.8 / 9
Regulatory Posture 3.0 / 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 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 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/carbon-intensity: 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.

Carbon Intensity API Factors API

Carbon intensity factors by fuel type

Carbon Intensity API Generation Mix API

Electricity generation mix data (beta)

Carbon Intensity API National Intensity API

National carbon intensity data for Great Britain

Carbon Intensity API Regional API

Regional carbon intensity and generation mix data (beta)

Carbon Intensity API Statistics API

Carbon intensity statistics and aggregations

Open Collections 6

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

API Collection

OPEN COLLECTION

Carbon Intensity Factors API

OPEN COLLECTION

Carbon Intensity Factors Generation Mix API

OPEN COLLECTION

Carbon Intensity Factors National Intensity API

OPEN COLLECTION

Carbon Intensity Factors Regional API

OPEN COLLECTION

Carbon Intensity Factors Statistics API

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Carbon Intensity Plans

1 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Carbon Intensity Rate Limits

3 limits

RATE LIMITS

FinOps 1

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

Carbon Intensity Finops

FINOPS

Semantic Vocabularies 1

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

Carbon Intensity Context

0 classes · 35 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Carbon Intensity API API Rules

5 rules · 3 warnings 2 info

SPECTRAL

JSON Schema 4

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

Generation Mix

3 properties

JSON SCHEMA

Carbon Intensity Factors

14 properties

JSON SCHEMA

Intensity Period

3 properties

JSON SCHEMA

Regional Intensity

7 properties

JSON SCHEMA

Examples 5

Example request and response payloads for these APIs.

Get Current Intensity

4 fields

EXAMPLE

Get Generation Mix

4 fields

EXAMPLE

Get Intensity Factors

4 fields

EXAMPLE

Get Intensity Stats

4 fields

EXAMPLE

Get Regional Intensity

4 fields

EXAMPLE

Security Posture 1

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

Carbon Intensity Domain Security

TLSv1.3

SECURITY

Agentic Access 1

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

Carbon Intensity Agentic Access

27 operations

27 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

GitHubOrganization
GitHubOrganization

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity

Operate 1

Status, limits, changes, and where to get help

IssueTracker
IssueTracker

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService
TermsOfService
 License
License

Company 2

The organization behind the API

Website
Website
 LinkedIn
LinkedIn

Other 1

Properties that don't map to a standard resource type

X
X

Source (apis.yml)

apis.yml Raw ↑ 
aid: carbon-intensity
deliveryModel:
  model: unknown
  open_source: unknown
  commercial: true
  callable_host: true
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - openapi
  - pricing
  - repository-unlicensed
  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/carbon-intensity.png
url: https://raw.githubusercontent.com/api-evangelist/carbon-intensity/refs/heads/main/apis.yml
name: Carbon Intensity API
description: The Carbon Intensity API is the official carbon intensity forecasting service for Great Britain, developed by
  the National Energy System Operator (NESO) in partnership with EDF, the University of Oxford, and WWF. It provides real-time,
  forecast, and historical carbon intensity data alongside generation mix information for GB electricity, with 96+ hour forecasts
  and 30-minute temporal resolution across 14 regional DNO boundaries. The API is publicly accessible with no authentication
  required and is licensed under CC BY 4.0.
specificationVersion: '0.23'
created: '2026-06-13'
modified: '2026-06-13'
tags:
- Carbon Intensity
- Environment
- Energy
- Electricity
- Climate
- Great Britain
- National Grid
apis:
- aid: carbon-intensity:carbon-intensity-factors-api
  name: Carbon Intensity API Factors API
  description: Carbon intensity factors by fuel type
  humanURL: https://carbonintensity.org.uk/
  baseURL: https://api.carbonintensity.org.uk
  tags:
  - Factors
  properties:
  - type: OpenAPI
    url: openapi/carbon-intensity-factors-api-openapi.yml
  - type: Documentation
    url: https://carbon-intensity.github.io/api-definitions/
  - type: GitHubRepository
    url: https://github.com/carbon-intensity/api-definitions
  - type: TermsOfService
    url: https://github.com/carbon-intensity/terms
  - type: License
    url: https://creativecommons.org/licenses/by/4.0/
  - type: Plans
    url: https://raw.githubusercontent.com/api-evangelist/carbon-intensity/refs/heads/main/plans/carbon-intensity-plans.yml
  - type: RateLimits
    url: https://raw.githubusercontent.com/api-evangelist/carbon-intensity/refs/heads/main/rate-limits/carbon-intensity-rate-limits.yml
  - type: FinOps
    url: https://raw.githubusercontent.com/api-evangelist/carbon-intensity/refs/heads/main/finops/carbon-intensity-finops.yml
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/carbon-intensity/refs/heads/main/json-schema/intensity-period.json
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/carbon-intensity/refs/heads/main/json-schema/generation-mix.json
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/carbon-intensity/refs/heads/main/json-schema/regional-intensity.json
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/carbon-intensity/refs/heads/main/json-schema/intensity-factors.json
  - type: Vocabulary
    url: https://raw.githubusercontent.com/api-evangelist/carbon-intensity/refs/heads/main/vocabulary/carbon-intensity-vocabulary.yml
  - type: JSONLDContext
    url: https://raw.githubusercontent.com/api-evangelist/carbon-intensity/refs/heads/main/json-ld/carbon-intensity-context.jsonld
- aid: carbon-intensity:carbon-intensity-generation-mix-api
  name: Carbon Intensity API Generation Mix API
  description: Electricity generation mix data (beta)
  humanURL: https://carbonintensity.org.uk/
  baseURL: https://api.carbonintensity.org.uk
  tags:
  - Generation Mix
  properties:
  - type: OpenAPI
    url: openapi/carbon-intensity-generation-mix-api-openapi.yml
  - type: Documentation
    url: https://carbon-intensity.github.io/api-definitions/
  - type: GitHubRepository
    url: https://github.com/carbon-intensity/api-definitions
  - type: TermsOfService
    url: https://github.com/carbon-intensity/terms
  - type: License
    url: https://creativecommons.org/licenses/by/4.0/
  - type: Plans
    url: https://raw.githubusercontent.com/api-evangelist/carbon-intensity/refs/heads/main/plans/carbon-intensity-plans.yml
  - type: RateLimits
    url: https://raw.githubusercontent.com/api-evangelist/carbon-intensity/refs/heads/main/rate-limits/carbon-intensity-rate-limits.yml
  - type: FinOps
    url: https://raw.githubusercontent.com/api-evangelist/carbon-intensity/refs/heads/main/finops/carbon-intensity-finops.yml
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/carbon-intensity/refs/heads/main/json-schema/intensity-period.json
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/carbon-intensity/refs/heads/main/json-schema/generation-mix.json
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/carbon-intensity/refs/heads/main/json-schema/regional-intensity.json
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/carbon-intensity/refs/heads/main/json-schema/intensity-factors.json
  - type: Vocabulary
    url: https://raw.githubusercontent.com/api-evangelist/carbon-intensity/refs/heads/main/vocabulary/carbon-intensity-vocabulary.yml
  - type: JSONLDContext
    url: https://raw.githubusercontent.com/api-evangelist/carbon-intensity/refs/heads/main/json-ld/carbon-intensity-context.jsonld
- aid: carbon-intensity:carbon-intensity-national-intensity-api
  name: Carbon Intensity API National Intensity API
  description: National carbon intensity data for Great Britain
  humanURL: https://carbonintensity.org.uk/
  baseURL: https://api.carbonintensity.org.uk
  tags:
  - National Intensity
  properties:
  - type: OpenAPI
    url: openapi/carbon-intensity-national-intensity-api-openapi.yml
  - type: Documentation
    url: https://carbon-intensity.github.io/api-definitions/
  - type: GitHubRepository
    url: https://github.com/carbon-intensity/api-definitions
  - type: TermsOfService
    url: https://github.com/carbon-intensity/terms
  - type: License
    url: https://creativecommons.org/licenses/by/4.0/
  - type: Plans
    url: https://raw.githubusercontent.com/api-evangelist/carbon-intensity/refs/heads/main/plans/carbon-intensity-plans.yml
  - type: RateLimits
    url: https://raw.githubusercontent.com/api-evangelist/carbon-intensity/refs/heads/main/rate-limits/carbon-intensity-rate-limits.yml
  - type: FinOps
    url: https://raw.githubusercontent.com/api-evangelist/carbon-intensity/refs/heads/main/finops/carbon-intensity-finops.yml
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/carbon-intensity/refs/heads/main/json-schema/intensity-period.json
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/carbon-intensity/refs/heads/main/json-schema/generation-mix.json
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/carbon-intensity/refs/heads/main/json-schema/regional-intensity.json
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/carbon-intensity/refs/heads/main/json-schema/intensity-factors.json
  - type: Vocabulary
    url: https://raw.githubusercontent.com/api-evangelist/carbon-intensity/refs/heads/main/vocabulary/carbon-intensity-vocabulary.yml
  - type: JSONLDContext
    url: https://raw.githubusercontent.com/api-evangelist/carbon-intensity/refs/heads/main/json-ld/carbon-intensity-context.jsonld
- aid: carbon-intensity:carbon-intensity-regional-api
  name: Carbon Intensity API Regional API
  description: Regional carbon intensity and generation mix data (beta)
  humanURL: https://carbonintensity.org.uk/
  baseURL: https://api.carbonintensity.org.uk
  tags:
  - Regional
  properties:
  - type: OpenAPI
    url: openapi/carbon-intensity-regional-api-openapi.yml
  - type: Documentation
    url: https://carbon-intensity.github.io/api-definitions/
  - type: GitHubRepository
    url: https://github.com/carbon-intensity/api-definitions
  - type: TermsOfService
    url: https://github.com/carbon-intensity/terms
  - type: License
    url: https://creativecommons.org/licenses/by/4.0/
  - type: Plans
    url: https://raw.githubusercontent.com/api-evangelist/carbon-intensity/refs/heads/main/plans/carbon-intensity-plans.yml
  - type: RateLimits
    url: https://raw.githubusercontent.com/api-evangelist/carbon-intensity/refs/heads/main/rate-limits/carbon-intensity-rate-limits.yml
  - type: FinOps
    url: https://raw.githubusercontent.com/api-evangelist/carbon-intensity/refs/heads/main/finops/carbon-intensity-finops.yml
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/carbon-intensity/refs/heads/main/json-schema/intensity-period.json
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/carbon-intensity/refs/heads/main/json-schema/generation-mix.json
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/carbon-intensity/refs/heads/main/json-schema/regional-intensity.json
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/carbon-intensity/refs/heads/main/json-schema/intensity-factors.json
  - type: Vocabulary
    url: https://raw.githubusercontent.com/api-evangelist/carbon-intensity/refs/heads/main/vocabulary/carbon-intensity-vocabulary.yml
  - type: JSONLDContext
    url: https://raw.githubusercontent.com/api-evangelist/carbon-intensity/refs/heads/main/json-ld/carbon-intensity-context.jsonld
- aid: carbon-intensity:carbon-intensity-statistics-api
  name: Carbon Intensity API Statistics API
  description: Carbon intensity statistics and aggregations
  humanURL: https://carbonintensity.org.uk/
  baseURL: https://api.carbonintensity.org.uk
  tags:
  - Statistics
  properties:
  - type: OpenAPI
    url: openapi/carbon-intensity-statistics-api-openapi.yml
  - type: Documentation
    url: https://carbon-intensity.github.io/api-definitions/
  - type: GitHubRepository
    url: https://github.com/carbon-intensity/api-definitions
  - type: TermsOfService
    url: https://github.com/carbon-intensity/terms
  - type: License
    url: https://creativecommons.org/licenses/by/4.0/
  - type: Plans
    url: https://raw.githubusercontent.com/api-evangelist/carbon-intensity/refs/heads/main/plans/carbon-intensity-plans.yml
  - type: RateLimits
    url: https://raw.githubusercontent.com/api-evangelist/carbon-intensity/refs/heads/main/rate-limits/carbon-intensity-rate-limits.yml
  - type: FinOps
    url: https://raw.githubusercontent.com/api-evangelist/carbon-intensity/refs/heads/main/finops/carbon-intensity-finops.yml
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/carbon-intensity/refs/heads/main/json-schema/intensity-period.json
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/carbon-intensity/refs/heads/main/json-schema/generation-mix.json
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/carbon-intensity/refs/heads/main/json-schema/regional-intensity.json
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/carbon-intensity/refs/heads/main/json-schema/intensity-factors.json
  - type: Vocabulary
    url: https://raw.githubusercontent.com/api-evangelist/carbon-intensity/refs/heads/main/vocabulary/carbon-intensity-vocabulary.yml
  - type: JSONLDContext
    url: https://raw.githubusercontent.com/api-evangelist/carbon-intensity/refs/heads/main/json-ld/carbon-intensity-context.jsonld
common:
- type: IssueTracker
  url: https://github.com/carbon-intensity/api-definitions/issues
- type: AgenticAccess
  url: agentic-access/carbon-intensity-agentic-access.yml
- type: DomainSecurity
  url: security/carbon-intensity-domain-security.yml
- type: Website
  url: https://carbonintensity.org.uk/
- type: Documentation
  url: https://carbon-intensity.github.io/api-definitions/
- type: GitHubOrganization
  url: https://github.com/carbon-intensity
- type: TermsOfService
  url: https://github.com/carbon-intensity/terms
- type: License
  url: https://creativecommons.org/licenses/by/4.0/
- type: X
  url: https://x.com/carbonintensity
- type: LinkedIn
  url: https://www.linkedin.com/company/national-energy-system-operator
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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