Greenspark website screenshot

Greenspark

Greenspark is an Impact-as-a-Service platform that lets businesses embed climate and environmental action into their products and customer journeys. Its Climate API programmatically funds verified impacts — carbon offset, tree planting, ocean-plastic recovery, kelp restoration, clean water and bee protection — and provides carbon-footprint estimation (by Merchant Category Code or Open Banking category), impact reporting, email/notification templates, and embeddable impact widgets for storefronts. Authentication is a single x-api-key header with separate sandbox, demo and production environments. Greenspark ships six first-party TypeScript SDKs, a ReadMe-hosted MCP server, and packaged Agent Skills. Backed by Anthemis; profiled and enriched by the API Evangelist network.

Greenspark publishes 7 API contracts indexed on the APIs.io network, including Account API, Email API, Estimations API, and 4 more. Tagged areas include Sustainability, Carbon Offset, Climate, Impact, and Carbon Estimation.

Greenspark’s developer surface includes documentation, API reference, support, pricing, signup flow, authentication, sandbox, and 23 more developer resources.

🌐 Visit website 📡 Source on GitHub
40.6/100 developing ▬ flat Agent 28/100 agent aware Front door AI 1/6 silent saas Full breakdown ↓
scored 2026-10-09 · rubric v0.23.0
1 published contract 1 MCP Servers
SustainabilityCarbon OffsetClimateImpactCarbon EstimationReportingESGFintech

What this lets a business do 1

Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →

Sustainability Management
BC-740
EstimationsImpactsReports
POST /v1/estimations/transaction/mcc POST /v1/impacts GET /v1/reports/carbon-by-interval GET /v1/reports

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-10-09 · rubric v0.23.0
Composite quality — 40.6/100 · developing
Contract Quality 10.0 / 19
Developer Ergonomics 7.7 / 15
Access Clarity 4.7 / 15
Operational Transparency 1.8 / 10
Contract Governance 0.4 / 9
Discoverability 5.4 / 8
Regulatory Posture 3.7 / 15
Create-or-Update Ergonomics 0.0 / 10
Agent readiness — 28/100 · agent aware
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 5 / 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
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 applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.
The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% 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/greenspark: 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 7

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

Greenspark Account API

The Account API from Greenspark — 3 operation(s) for account.

Greenspark Email API

The Email API from Greenspark — 14 operation(s) for email.

Greenspark Estimations API

The Estimations API from Greenspark — 4 operation(s) for estimations.

Greenspark Impacts API

The Impacts API from Greenspark — 5 operation(s) for impacts.

Greenspark Projects API

The Projects API from Greenspark — 3 operation(s) for projects.

Greenspark Reports API

The Reports API from Greenspark — 15 operation(s) for reports.

Greenspark Widgets API

The Widgets API from Greenspark — 17 operation(s) for widgets.

Scroll for all 7

Open Collections 8

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

API Collection

OPEN COLLECTION

Greenspark Climate Account API

OPEN COLLECTION

Greenspark Climate Account Email API

OPEN COLLECTION

Greenspark Climate Account Estimations API

OPEN COLLECTION

Greenspark Climate Account Impacts API

OPEN COLLECTION

Greenspark Climate Account Projects API

OPEN COLLECTION

Greenspark Climate Account Reports API

OPEN COLLECTION

Greenspark Climate Account Widgets API

OPEN COLLECTION

Scroll for all 8

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

Greenspark MCP Server

Greenspark operates an official remote MCP server hosted by ReadMe at https://docs.getgreenspark.com/mcp. v1 is read-only: it exposes the Greenspark OpenAPI specs and guides for...

MCP SERVER

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.

Greenspark Openapi Overlay

2 actions · update · greenspark-openapi.yml

UNRECORDED

Security Posture 2

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

Greenspark Authentication

apiKey · 1 scheme

SECURITY

Greenspark Domain Security

TLSv1.3 · DMARC

SECURITY

Agentic Access 1

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

Greenspark Agentic Access

67 operations · 34 acting · 1 human-in-the-loop

67 operations · 34 acting

AGENTIC

Resources

Get Started 4

Portal, sign-up, and the first successful call

DeveloperPortal
DeveloperPortal
 SignUp
SignUp
 Login
Login
 Sandbox
Sandbox

Documentation 3

Reference material describing how the API behaves

Documentation
Documentation
 APIReference
APIReference
 OpenAPI
OpenAPI

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess
 MCPServer
MCPServer
 AgentSkill
AgentSkill
 LLMsTxt
LLMsTxt

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Conventions
Conventions
 Lifecycle
Lifecycle
 ErrorCatalog
ErrorCatalog
 Components
Components
 Conformance
Conformance
 DataModel
DataModel

Build 3

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization
 Packages
Packages
 SDKs
SDKs

Access & Security 2

Authentication, authorization, and security posture

Authentication
Authentication
 DomainSecurity
DomainSecurity

Operate 2

Status, limits, changes, and where to get help

Support
Support
 ChangeLog
ChangeLog

Commercial 3

Pricing, plans, and the legal terms of use

Pricing
Pricing
 TermsOfService
TermsOfService
 PrivacyPolicy
PrivacyPolicy

Company 1

The organization behind the API

Website
Website

Other 2

Properties that don't map to a standard resource type

CapabilityMap
CapabilityMap
 Overlay
Overlay

Source (apis.yml)

apis.yml Raw ↑ 
aid: greenspark
name: Greenspark
description: Greenspark is an Impact-as-a-Service platform that lets businesses embed climate and environmental action into
  their products and customer journeys. Its Climate API programmatically funds verified impacts — carbon offset, tree planting,
  ocean-plastic recovery, kelp restoration, clean water and bee protection — and provides carbon-footprint estimation (by
  Merchant Category Code or Open Banking category), impact reporting, email/notification templates, and embeddable impact
  widgets for storefronts. Authentication is a single x-api-key header with separate sandbox, demo and production environments.
  Greenspark ships six first-party TypeScript SDKs, a ReadMe-hosted MCP server, and packaged Agent Skills. Backed by Anthemis;
  profiled and enriched by the API Evangelist network.
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - security
  - sandbox
  generated: '2026-09-03'
  method: derived
image: https://cdn.prod.website-files.com/611391a1477389e3857d8014/64cb3773a1ba8a68d73a88ad_greenspark-logo.svg
url: https://raw.githubusercontent.com/api-evangelist/greenspark/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- anthemis
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-19'
x-docs-platform: readme
x-docs-platform-confidence: high
x-docs-platform-checked: 2026-10-03
tags:
- Sustainability
- Carbon Offset
- Climate
- Impact
- Carbon Estimation
- Reporting
- ESG
- Fintech
apis:
- aid: greenspark:greenspark-account-api
  name: Greenspark Account API
  description: The Account API from Greenspark — 3 operation(s) for account.
  humanURL: https://docs.getgreenspark.com
  baseURL: https://api.getgreenspark.com
  tags:
  - Account
  properties:
  - type: OpenAPI
    url: openapi/greenspark-account-api-openapi.yml
  - type: DeveloperPortal
    url: https://docs.getgreenspark.com
  - type: Documentation
    url: https://docs.getgreenspark.com/docs
  - type: APIReference
    url: https://docs.getgreenspark.com/reference
- aid: greenspark:greenspark-email-api
  name: Greenspark Email API
  description: The Email API from Greenspark — 14 operation(s) for email.
  humanURL: https://docs.getgreenspark.com
  baseURL: https://api.getgreenspark.com
  tags:
  - Email
  properties:
  - type: OpenAPI
    url: openapi/greenspark-email-api-openapi.yml
  - type: DeveloperPortal
    url: https://docs.getgreenspark.com
  - type: Documentation
    url: https://docs.getgreenspark.com/docs
  - type: APIReference
    url: https://docs.getgreenspark.com/reference
- aid: greenspark:greenspark-estimations-api
  name: Greenspark Estimations API
  description: The Estimations API from Greenspark — 4 operation(s) for estimations.
  humanURL: https://docs.getgreenspark.com
  baseURL: https://api.getgreenspark.com
  tags:
  - Estimations
  properties:
  - type: OpenAPI
    url: openapi/greenspark-estimations-api-openapi.yml
  - type: DeveloperPortal
    url: https://docs.getgreenspark.com
  - type: Documentation
    url: https://docs.getgreenspark.com/docs
  - type: APIReference
    url: https://docs.getgreenspark.com/reference
- aid: greenspark:greenspark-impacts-api
  name: Greenspark Impacts API
  description: The Impacts API from Greenspark — 5 operation(s) for impacts.
  humanURL: https://docs.getgreenspark.com
  baseURL: https://api.getgreenspark.com
  tags:
  - Impacts
  properties:
  - type: OpenAPI
    url: openapi/greenspark-impacts-api-openapi.yml
  - type: DeveloperPortal
    url: https://docs.getgreenspark.com
  - type: Documentation
    url: https://docs.getgreenspark.com/docs
  - type: APIReference
    url: https://docs.getgreenspark.com/reference
- aid: greenspark:greenspark-projects-api
  name: Greenspark Projects API
  description: The Projects API from Greenspark — 3 operation(s) for projects.
  humanURL: https://docs.getgreenspark.com
  baseURL: https://api.getgreenspark.com
  tags:
  - Project
  tags_raw:
  - Projects
  properties:
  - type: OpenAPI
    url: openapi/greenspark-projects-api-openapi.yml
  - type: DeveloperPortal
    url: https://docs.getgreenspark.com
  - type: Documentation
    url: https://docs.getgreenspark.com/docs
  - type: APIReference
    url: https://docs.getgreenspark.com/reference
- aid: greenspark:greenspark-reports-api
  name: Greenspark Reports API
  description: The Reports API from Greenspark — 15 operation(s) for reports.
  humanURL: https://docs.getgreenspark.com
  baseURL: https://api.getgreenspark.com
  tags:
  - Reports
  properties:
  - type: OpenAPI
    url: openapi/greenspark-reports-api-openapi.yml
  - type: DeveloperPortal
    url: https://docs.getgreenspark.com
  - type: Documentation
    url: https://docs.getgreenspark.com/docs
  - type: APIReference
    url: https://docs.getgreenspark.com/reference
- aid: greenspark:greenspark-widgets-api
  name: Greenspark Widgets API
  description: The Widgets API from Greenspark — 17 operation(s) for widgets.
  humanURL: https://docs.getgreenspark.com
  baseURL: https://api.getgreenspark.com
  tags:
  - Widgets
  properties:
  - type: OpenAPI
    url: openapi/greenspark-widgets-api-openapi.yml
  - type: DeveloperPortal
    url: https://docs.getgreenspark.com
  - type: Documentation
    url: https://docs.getgreenspark.com/docs
  - type: APIReference
    url: https://docs.getgreenspark.com/reference
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: CapabilityMap
  url: capabilities/greenspark-capability-edges.yml
  name: Greenspark Business Capability Map
- type: Website
  url: https://www.getgreenspark.com/
- type: DeveloperPortal
  url: https://docs.getgreenspark.com
- type: Documentation
  url: https://docs.getgreenspark.com/docs
- type: APIReference
  url: https://docs.getgreenspark.com/reference
- type: GitHubOrganization
  url: https://github.com/getgreenspark
- type: Support
  url: mailto:support@getgreenspark.com
- type: Pricing
  url: https://www.getgreenspark.com/pricing/business
- type: SignUp
  url: https://app.getgreenspark.com/login
- type: Login
  url: https://app.getgreenspark.com/login
- type: TermsOfService
  url: https://www.getgreenspark.com/utility/legal
- type: PrivacyPolicy
  url: https://app.privasee.io/privacy-portal/61a7587adcff740014657fbf
- type: OpenAPI
  url: openapi/_original/greenspark-openapi.yml
- type: Authentication
  url: authentication/greenspark-authentication.yml
- type: AgenticAccess
  url: agentic-access/greenspark-agentic-access.yml
- type: DomainSecurity
  url: security/greenspark-domain-security.yml
- type: Packages
  url: packages/greenspark-packages.yml
- type: SDKs
  url: packages/greenspark-packages.yml
- type: MCPServer
  url: mcp/greenspark-mcp.yml
- type: AgentSkill
  url: skills/_index.yml
- type: LLMsTxt
  url: llms/greenspark-llms.txt
- type: Conventions
  url: conventions/greenspark-conventions.yml
- type: Lifecycle
  url: lifecycle/greenspark-lifecycle.yml
- type: ErrorCatalog
  url: errors/greenspark-problem-types.yml
- type: Sandbox
  url: sandbox/greenspark-sandbox.yml
- type: Components
  url: components/greenspark-components.yml
- type: Conformance
  url: conformance/greenspark-conformance.yml
- type: DataModel
  url: data-model/greenspark-data-model.yml
- type: ChangeLog
  url: changelog/greenspark-changelog.yml
- type: Overlay
  url: overlays/greenspark-openapi-overlay.yaml
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence

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