greencalculus-com

GreenCalculus provides an Emission-Factor API with an audit trail, offering sourced greenhouse‑gas emission factors and carbon calculation tools. The service aggregates data from DEFRA, EPA, IPCC, Ember and other publishers, delivering versioned releases, citation metadata, and free API keys for developers. It supports factor lookup, bulk data feeds, discovery endpoints, and calculation engines, all documented with OpenAPI and accessible via https://api.greencalculus.com.

greencalculus-com publishes 6 API contracts indexed on the APIs.io network, including Account API, Bulk API, Calculate API, and 3 more. Tagged areas include Company, Emissions, API, Data, and Sustainability.

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

greencalculus-com’s developer surface includes CLI, changelog, authentication, documentation, API reference, getting-started guide, pricing, and 21 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

57.5/100 strong Agent 47/100 agent ready Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →

1 published contract

Company EmissionsAPIData Sustainability

Kin Score

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

Composite quality — 57.5/100 · strong

Contract Quality 12.1 / 21

Developer Ergonomics 10.9 / 17

Access Clarity 8.6 / 17

Operational Transparency 2.3 / 11

Contract Governance 8.1 / 10

Discoverability 5.6 / 9

Regulatory Posture 3.7 / 15

Agent readiness — 47/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 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 6 / 6

Protected Resource Metadata 5 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 0 / 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):

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)
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document
Typed Event Surface +6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks
Documented Reversibility +6 pts — a reversal operation in the contract, graded up when a window is documented too

6 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 57.0 — up to +10.8 composite points
Operational Transparency scores 21.1 — up to +10.3 composite points
Access Clarity scores 50.5 — up to +9.9 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/greencalculus-com/apis.yml: open an issue on github.com/api-evangelist/greencalculus-com 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 6

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

GreenCalculus API

Emission-Factor API with audit trail, providing sourced greenhouse‑gas emission factors and carbon calculation tools.

greencalculus-com Account API

Watchlists and the reporting-period diff — the alerting half of the API

greencalculus-com Bulk API

Consolidated corpus feed

greencalculus-com Calculate API

Audit-traced calculation engines

greencalculus-com Discovery API

The spec, the change feed, coverage, absence and the sourcing roadmap

greencalculus-com Factors API

Emission-factor lookup and browse

Pricing Plans 1

Published pricing tiers and plan structures.

Greencalculus Com Plans Pricing

2 plans

PLANS

Semantic Vocabularies 1

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

Greencalculus Com Context

35 classes · 122 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

greencalculus-com API Rules

13 rules · 11 errors 1 warnings 1 info

SPECTRAL

Security Posture 2

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

Greencalculus Com Authentication

1 scheme

SECURITY

Greencalculus Com Domain Security

TLSv1.3 · DMARC

SECURITY

Agentic Access 1

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

Greencalculus Com Agentic Access

29 operations · 13 acting · 1 human-in-the-loop

29 operations · 13 acting

AGENTIC

Resources

Get Started 2

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

LLMsTxt

LLMsTxt

WellKnown

WellKnown

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

DataModel

ErrorCatalog

Conformance

Build 4

SDKs, sample code, and the tooling you integrate with

CLI

CLI

SDKs

SDKs

Packages

Packages

GitHubOrganization

GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

ChangeLog

ChangeLog

ChangeLog

ChangeLog

Commercial 4

Pricing, plans, and the legal terms of use

Plans

Pricing

TermsOfService

PrivacyPolicy

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: greencalculus-com
name: greencalculus-com
image: https://greencalculus.com/wp-content/uploads/2026/10/greencalculus-share-card-2026-10.jpg
description: GreenCalculus provides an Emission-Factor API with an audit trail, offering sourced greenhouse‑gas emission factors
  and carbon calculation tools. The service aggregates data from DEFRA, EPA, IPCC, Ember and other publishers, delivering
  versioned releases, citation metadata, and free API keys for developers. It supports factor lookup, bulk data feeds, discovery
  endpoints, and calculation engines, all documented with OpenAPI and accessible via https://api.greencalculus.com.
url: https://artifacts.apis.io/greencalculus-com/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-30 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-30'
modified: '2026-10-30'
tags:
- Company
- Emissions
- API
- Data
- Sustainability
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: AgenticAccess
  url: agentic-access/greencalculus-com-agentic-access.yml
- type: Plans
  url: plans/greencalculus-com-plans-pricing.yml
- type: Spectral
  url: rules/greencalculus-com-rules.yml
- type: JSONLD
  url: json-ld/greencalculus-com-context.jsonld
- type: Vocabulary
  url: vocabulary/greencalculus-com-vocabulary.yml
- type: DataModel
  url: data-model/greencalculus-com-data-model.yml
- type: CLI
  url: cli/greencalculus-com-cli.yml
- type: ChangeLog
  url: changelog/greencalculus-com-changelog.yml
- type: Authentication
  url: authentication/greencalculus-com-authentication.yml
- type: ErrorCatalog
  url: errors/greencalculus-com-problem-types.yml
- type: Conformance
  url: conformance/greencalculus-com-conformance.yml
- type: LLMsTxt
  url: llms/greencalculus-com-llms.txt
- type: WellKnown
  url: well-known/greencalculus-com-well-known.yml
- type: Hosts
  url: hosts/greencalculus-com-hosts.yml
- type: Vendors
  url: vendors/greencalculus-com-vendors.yml
- type: SDKs
  url: packages/greencalculus-com-packages.yml
- type: Packages
  url: packages/greencalculus-com-packages.yml
- type: GitHubOrganization
  url: https://github.com/greencalculus
- type: ChangeLog
  url: https://greencalculus.com/changelog/
- type: DomainSecurity
  url: security/greencalculus-com-domain-security.yml
- type: Website
  url: https://greencalculus.com/
- type: DeveloperPortal
  url: https://greencalculus.com/developers/
- type: Documentation
  url: https://greencalculus.com/developers/docs/
- type: APIReference
  url: https://api.greencalculus.com/openapi.json
- type: GettingStarted
  url: https://greencalculus.com/developers/quickstart/
- type: Pricing
  url: https://greencalculus.com/developers/#pricing
- type: TermsOfService
  url: https://greencalculus.com/terms/
- type: PrivacyPolicy
  url: https://greencalculus.com/privacy/
apis:
- name: GreenCalculus API
  description: Emission-Factor API with audit trail, providing sourced greenhouse‑gas emission factors and carbon calculation
    tools.
  humanURL: https://greencalculus.com/developers/
  baseURL: https://api.greencalculus.com
  aid: greencalculus-com:greencalculus-api
- aid: greencalculus-com:greencalculus-com-account-api
  name: greencalculus-com Account API
  description: Watchlists and the reporting-period diff — the alerting half of the API
  humanURL: https://greencalculus.com/developers/
  baseURL: https://api.greencalculus.com
  tags:
  - Account
  properties:
  - type: OpenAPI
    url: openapi/greencalculus-com-account-api-openapi.yml
- aid: greencalculus-com:greencalculus-com-bulk-api
  name: greencalculus-com Bulk API
  description: Consolidated corpus feed
  humanURL: https://greencalculus.com/developers/
  baseURL: https://api.greencalculus.com
  tags:
  - Bulk
  properties:
  - type: OpenAPI
    url: openapi/greencalculus-com-bulk-api-openapi.yml
- aid: greencalculus-com:greencalculus-com-calculate-api
  name: greencalculus-com Calculate API
  description: Audit-traced calculation engines
  humanURL: https://greencalculus.com/developers/
  baseURL: https://api.greencalculus.com
  tags:
  - Calculate
  properties:
  - type: OpenAPI
    url: openapi/greencalculus-com-calculate-api-openapi.yml
- aid: greencalculus-com:greencalculus-com-discovery-api
  name: greencalculus-com Discovery API
  description: The spec, the change feed, coverage, absence and the sourcing roadmap
  humanURL: https://greencalculus.com/developers/
  baseURL: https://api.greencalculus.com
  tags:
  - Discovery
  properties:
  - type: OpenAPI
    url: openapi/greencalculus-com-discovery-api-openapi.yml
- aid: greencalculus-com:greencalculus-com-factors-api
  name: greencalculus-com Factors API
  description: Emission-factor lookup and browse
  humanURL: https://greencalculus.com/developers/
  baseURL: https://api.greencalculus.com
  tags:
  - Factors
  properties:
  - type: OpenAPI
    url: openapi/greencalculus-com-factors-api-openapi.yml
x-enrichment:
  date: '2026-10-30'
  status: enriched
  artifacts_added: 25
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

greencalculus-com API — frequently asked questions

Does greencalculus-com have an API?

Yes. APIs.io lists 6 APIs from greencalculus-com, including GreenCalculus API, greencalculus-com Account API and greencalculus-com Bulk API, and 3 more.

Is there an OpenAPI specification for the greencalculus-com API?

Yes. APIs.io indexes 5 OpenAPI specifications for greencalculus-com, each linked for download from this page.

How do I authenticate with the greencalculus-com API?

greencalculus-com documents its authentication (1 scheme). The details are profiled on APIs.io as Greencalculus Com Authentication.

How much does the greencalculus-com API cost?

APIs.io lists 2 pricing plans for greencalculus-com, with each plan's price, limits and inclusions under Pricing Plans on this page.

Is the greencalculus-com API ready for AI agents?

greencalculus-com has a Kin Score of 57.5 out of 100 (strong) and an Agent Readiness score of 47.2 (agent-ready), scored by API Evangelist on 2026-10-31.

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