Green Button Alliance

The Green Button Alliance (GBA) is the non-profit that stewards, tests and certifies the Green Button standard — the NAESB REQ.21 Energy Services Provider Interface (ESPI) profile for utility customer electricity, natural gas and water usage data, in its Download My Data (DMD) and Connect My Data (CMD) forms. Incorporated in North Carolina and headquartered at PO Box 268, Jamison, Pennsylvania, it was formed after the 2012 White House / U.S. Department of Energy / NIST call to action and is the industry's only source of Green Button certification (Data Custodian DMD $3,000, CMD $3,200, membership not required), alongside a free public Directory Services listing of utilities, third-party apps and platform providers. GBA sits in the standards-and-certification layer of the United States energy value chain, above the investor-owned utilities and the energy-data platforms (UtilityAPI, Con Edison and Enbridge Gas are sponsor members) that actually move consumer data. Its API posture is contracts without a service: three real OpenAPI 3.x definitions - the CMD ESPI resource server, the ApplicationInformation registration resource, and the OpenESPI OAuth 2.0 / OIDC authorization server - are published free under Apache 2.0 on GitHub, but the normative ESPI v4.0 standard itself must be purchased from NAESB, GBA operates no production consumer-data or market-data API of its own, and its ESPI sandbox at sandbox.greenbuttonalliance.org:8443 is offline pending a replacement platform expected 2026Q3. Green Button in the United States is voluntary — there is no federal mandate — with obligation arriving only through state action and, outside the US, Ontario's O. Reg. 633/21.

Green Button Alliance publishes 8 APIs on the APIs.io network, including Application Information API, Authorization API, Batch API, and 5 more. Tagged areas include Energy, United States, Utilities, Electricity, and Gas.

The Green Button Alliance catalog on APIs.io includes 1 event-driven AsyncAPI specification.

Green Button Alliance’s developer surface includes authentication, code examples, sandbox, support, pricing, signup flow, documentation, and 47 more developer resources.

🌐 Visit website 📡 Source on GitHub

58.4/100 strong ▬ flat Agent 40/100 agent ready open core · Apache-2.0 Full breakdown ↓
scored 2026-09-06 · rubric v0.19.0

AccessSelf serve

3 APIs

Energy United States Utilities Electricity Gas Water Smart Metering Green Button ESPI Standards Body CertificationConsumer Energy Data

Kin Score

Kin Score How this is scored →
scored 2026-09-06 · rubric v0.19.0

Composite quality — 58.4/100 · strong

Contract Quality 12.7 / 21

Developer Ergonomics 9.2 / 17

Access Clarity 7.6 / 17

Operational Transparency 2.3 / 11

Contract Governance 3.4 / 10

Discoverability 6.3 / 9

Regulatory Posture 12.4 / 15

Agent readiness — 40/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 6 / 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 6 / 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.

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/green-button-alliance: 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 9

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

Rate Limits 1

Documented rate limits and quota policies.

Examples 4

Example request and response payloads for these APIs.

Scopes 1

OAuth scopes governing access to this provider's APIs.

Green Button Alliance Scopes

OAuth 2.0 · no documented scopes

0 scopes

SCOPES

Agentic Access 1

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

Green Button Alliance Agentic Access

24 operations · 8 acting · 1 human-in-the-loop

24 operations · 8 acting

AGENTIC

Resources

Get Started 5

Portal, sign-up, and the first successful call

Sandbox

Sandbox

DeveloperPortal

DeveloperPortal

SignUp

SignUp

Login

Sandbox

Sandbox

Documentation 5

Reference material describing how the API behaves

Documentation

Documentation

APIReference

Specification

Specification

Agent Surfaces 5

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

AgentSkill

AgentSkill

X-MCPServerCandidate

X-MCPServerCandidate

WellKnown

WellKnown

LLMsTxt

LLMsTxt

Design & Contract 7

Pagination, idempotency, versioning, errors, and events

Vocabulary

Conventions

ErrorCatalog

Lifecycle

Conformance

DataModel

Webhooks

Scroll for all 7

Build 5

SDKs, sample code, and the tooling you integrate with

Examples

ToolCrosswalk

Packages

Tools

GitHubOrganization

GitHubOrganization

Access & Security 7

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

OAuthScopes

OAuthScopes

Authentication

Authentication

VulnerabilityDisclosure

VulnerabilityDisclosure

Security

Security

Certification

Certification

Certification

Certification

Scroll for all 7

Operate 5

Status, limits, changes, and where to get help

IssueTracker

RateLimits

Support

Support

ContactUs

Commercial 4

Pricing, plans, and the legal terms of use

License

Pricing

TermsOfService

PrivacyPolicy

Company 4

The organization behind the API

Website

Website

About

About

LinkedIn

Blog

Blog

Other 7

Properties that don't map to a standard resource type

CapabilityMap

Overlay

Overlay

OpenIDConnect

Directory

Source (apis.yml)

aid: green-button-alliance
url: https://raw.githubusercontent.com/api-evangelist/green-button-alliance/refs/heads/main/apis.yml
name: Green Button Alliance
kind: company
description: 'The Green Button Alliance (GBA) is the non-profit that stewards, tests and certifies the Green Button standard
  — the NAESB REQ.21 Energy Services Provider Interface (ESPI) profile for utility customer electricity, natural gas and water
  usage data, in its Download My Data (DMD) and Connect My Data (CMD) forms. Incorporated in North Carolina and headquartered
  at PO Box 268, Jamison, Pennsylvania, it was formed after the 2012 White House / U.S. Department of Energy / NIST call to
  action and is the industry''s only source of Green Button certification (Data Custodian DMD $3,000, CMD $3,200, membership
  not required), alongside a free public Directory Services listing of utilities, third-party apps and platform providers.
  GBA sits in the standards-and-certification layer of the United States energy value chain, above the investor-owned utilities
  and the energy-data platforms (UtilityAPI, Con Edison and Enbridge Gas are sponsor members) that actually move consumer
  data. Its API posture is contracts without a service: three real OpenAPI 3.x definitions - the CMD ESPI resource server,
  the ApplicationInformation registration resource, and the OpenESPI OAuth 2.0 / OIDC authorization server - are published
  free under Apache 2.0 on GitHub, but the normative ESPI v4.0 standard itself must be purchased from NAESB, GBA operates
  no production consumer-data or market-data API of its own, and its ESPI sandbox at sandbox.greenbuttonalliance.org:8443
  is offline pending a replacement platform expected 2026Q3. Green Button in the United States is voluntary — there is no
  federal mandate — with obligation arriving only through state action and, outside the US, Ontario''s O. Reg. 633/21.'
deliveryModel:
  model: open-core
  license: Apache-2.0
  open_source: true
  commercial: true
  callable_host: true
  label: Open core · an OSS project plus a commercial hosted product
  confidence: high
  source:
  - license
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Self-serve signup
  confidence: medium
  source:
  - authentication
  - scopes
  - security
  - sandbox
  generated: '2026-09-02'
  method: derived
image: https://assets-002.noviams.com/novi-file-uploads/gba/structure/gba-logo-2023-tm-500-1.png
tags:
- Energy
- United States
- Utilities
- Electricity
- Gas
- Water
- Smart Metering
- Green Button
- ESPI
- Standards Body
- Certification
- Consumer Energy Data
created: '2026-07-27'
modified: '2026-07-27'
specificationVersion: '0.23'
apis:
- aid: green-button-alliance:green-button-third-party-api
  name: Green Button Third Party (OpenESPI) API
  description: The Third Party side of the OpenESPI reference implementation — ApplicationInformation, Authorization and RetailCustomer
    operations documented as legacy Swagger 1.2 resource listings served from GBA's GitHub Pages site. The documented base
    path is https://services.greenbuttondata.org/ThirdParty, which returned HTTP 200 with an empty body on 2026-07-27. No
    OpenAPI 3.x definition of this surface was found and no live, callable service was confirmed; listed here because the
    documentation is genuinely published and reachable.
  humanURL: https://greenbuttonalliance.github.io/OpenESPI-GreenButton-API-Documentation/ThirdParty/
  baseURL: https://services.greenbuttondata.org/ThirdParty
  tags:
  - Green Button
  - Third Party
  - ESPI
  - Energy
  - Reference Implementation
  tags_raw:
  - Green Button
  - Third Party
  - ESPI
  - Energy
  - Reference Implementation
  properties:
  - type: APIReference
    url: https://greenbuttonalliance.github.io/OpenESPI-GreenButton-API-Documentation/ThirdParty/
  - type: Repository
    url: https://github.com/GreenButtonAlliance/OpenESPI-ThirdParty-java
  - type: Repository
    url: https://github.com/GreenButtonAlliance/OpenESPI-Common-java
- aid: green-button-alliance:green-button-alliance-applicationinformation-api
  name: Green Button Alliance Application Information API
  description: The ApplicationInformation API from Green Button Alliance — 2 operation(s) for applicationinformation.
  humanURL: https://greenbuttonalliance.github.io/OpenESPI-GreenButton-API-Documentation/API/
  baseURL: https://sandbox.greenbuttonalliance.org:8443/DataCustodian
  tags:
  - ApplicationInformation
  properties:
  - type: OpenAPI
    url: openapi/green-button-alliance-applicationinformation-api-openapi.yml
  - type: Examples
    url: examples/_index.yml
  - type: APIReference
    url: https://greenbuttonalliance.github.io/OpenESPI-GreenButton-API-Documentation/API/
  - type: Documentation
    url: https://www.greenbuttonalliance.org/green-button-connect-my-data-cmd
  - type: Documentation
    url: https://www.greenbuttonalliance.org/developer-resources
  - type: Repository
    url: https://github.com/GreenButtonAlliance/OpenAPI-Green-Button-Documentation
  - type: Repository
    url: https://github.com/GreenButtonAlliance/OpenESPI-DataCustodian-java
  - type: Specification
    url: https://www.naesb.org/espi_standards.asp
- aid: green-button-alliance:green-button-alliance-authorization-api
  name: Green Button Alliance Authorization API
  description: Authorization endpoints
  humanURL: https://greenbuttonalliance.github.io/OpenESPI-GreenButton-API-Documentation/API/
  baseURL: https://sandbox.greenbuttonalliance.org:8443/DataCustodian
  tags:
  - Authorization
  properties:
  - type: OpenAPI
    url: openapi/green-button-alliance-authorization-api-openapi.yml
  - type: Examples
    url: examples/_index.yml
  - type: APIReference
    url: https://greenbuttonalliance.github.io/OpenESPI-GreenButton-API-Documentation/API/
  - type: Documentation
    url: https://www.greenbuttonalliance.org/green-button-connect-my-data-cmd
  - type: Documentation
    url: https://www.greenbuttonalliance.org/developer-resources
  - type: Repository
    url: https://github.com/GreenButtonAlliance/OpenAPI-Green-Button-Documentation
  - type: Repository
    url: https://github.com/GreenButtonAlliance/OpenESPI-DataCustodian-java
  - type: Specification
    url: https://www.naesb.org/espi_standards.asp
- aid: green-button-alliance:green-button-alliance-batch-api
  name: Green Button Alliance Batch API
  description: Batch data transfer endpoints
  humanURL: https://greenbuttonalliance.github.io/OpenESPI-GreenButton-API-Documentation/API/
  baseURL: https://sandbox.greenbuttonalliance.org:8443/DataCustodian
  tags:
  - Batch
  properties:
  - type: OpenAPI
    url: openapi/green-button-alliance-batch-api-openapi.yml
  - type: Examples
    url: examples/_index.yml
  - type: APIReference
    url: https://greenbuttonalliance.github.io/OpenESPI-GreenButton-API-Documentation/API/
  - type: Documentation
    url: https://www.greenbuttonalliance.org/green-button-connect-my-data-cmd
  - type: Documentation
    url: https://www.greenbuttonalliance.org/developer-resources
  - type: Repository
    url: https://github.com/GreenButtonAlliance/OpenAPI-Green-Button-Documentation
  - type: Repository
    url: https://github.com/GreenButtonAlliance/OpenESPI-DataCustodian-java
  - type: Specification
    url: https://www.naesb.org/espi_standards.asp
- aid: green-button-alliance:green-button-alliance-datacustodian-integration-api
  name: Green Button Alliance DataCustodian Integration API
  description: Integration with OpenESPI DataCustodian
  humanURL: https://greenbuttonalliance.github.io/OpenESPI-GreenButton-API-Documentation/API/
  baseURL: https://sandbox.greenbuttonalliance.org:8443/DataCustodian
  tags:
  - DataCustodian Integration
  properties:
  - type: OpenAPI
    url: openapi/green-button-alliance-datacustodian-integration-api-openapi.yml
  - type: Examples
    url: examples/_index.yml
  - type: APIReference
    url: https://greenbuttonalliance.github.io/OpenESPI-GreenButton-API-Documentation/API/
  - type: Documentation
    url: https://www.greenbuttonalliance.org/green-button-connect-my-data-cmd
  - type: Documentation
    url: https://www.greenbuttonalliance.org/developer-resources
  - type: Repository
    url: https://github.com/GreenButtonAlliance/OpenAPI-Green-Button-Documentation
  - type: Repository
    url: https://github.com/GreenButtonAlliance/OpenESPI-DataCustodian-java
  - type: Specification
    url: https://www.naesb.org/espi_standards.asp
- aid: green-button-alliance:green-button-alliance-oauth2-client-management-api
  name: Green Button Alliance OAuth2 Client Management API
  description: Manage OAuth2 client registrations
  humanURL: https://greenbuttonalliance.github.io/OpenESPI-GreenButton-API-Documentation/API/
  baseURL: https://sandbox.greenbuttonalliance.org:8443/DataCustodian
  tags:
  - OAuth2 Client Management
  properties:
  - type: OpenAPI
    url: openapi/green-button-alliance-oauth2-client-management-api-openapi.yml
  - type: Examples
    url: examples/_index.yml
  - type: APIReference
    url: https://greenbuttonalliance.github.io/OpenESPI-GreenButton-API-Documentation/API/
  - type: Documentation
    url: https://www.greenbuttonalliance.org/green-button-connect-my-data-cmd
  - type: Documentation
    url: https://www.greenbuttonalliance.org/developer-resources
  - type: Repository
    url: https://github.com/GreenButtonAlliance/OpenAPI-Green-Button-Documentation
  - type: Repository
    url: https://github.com/GreenButtonAlliance/OpenESPI-DataCustodian-java
  - type: Specification
    url: https://www.naesb.org/espi_standards.asp
- aid: green-button-alliance:green-button-alliance-oauth2-standard-api
  name: Green Button Alliance OAuth2 Standard API
  description: Standard OAuth2 endpoints
  humanURL: https://greenbuttonalliance.github.io/OpenESPI-GreenButton-API-Documentation/API/
  baseURL: https://sandbox.greenbuttonalliance.org:8443/DataCustodian
  tags:
  - OAuth2 Standard
  properties:
  - type: OpenAPI
    url: openapi/green-button-alliance-oauth2-standard-api-openapi.yml
  - type: Examples
    url: examples/_index.yml
  - type: APIReference
    url: https://greenbuttonalliance.github.io/OpenESPI-GreenButton-API-Documentation/API/
  - type: Documentation
    url: https://www.greenbuttonalliance.org/green-button-connect-my-data-cmd
  - type: Documentation
    url: https://www.greenbuttonalliance.org/developer-resources
  - type: Repository
    url: https://github.com/GreenButtonAlliance/OpenAPI-Green-Button-Documentation
  - type: Repository
    url: https://github.com/GreenButtonAlliance/OpenESPI-DataCustodian-java
  - type: Specification
    url: https://www.naesb.org/espi_standards.asp
- aid: green-button-alliance:green-button-alliance-oidc-api
  name: Green Button Alliance OIDC API
  description: OpenID Connect endpoints
  humanURL: https://greenbuttonalliance.github.io/OpenESPI-GreenButton-API-Documentation/API/
  baseURL: https://sandbox.greenbuttonalliance.org:8443/DataCustodian
  tags:
  - OIDC
  properties:
  - type: OpenAPI
    url: openapi/green-button-alliance-oidc-api-openapi.yml
  - type: Examples
    url: examples/_index.yml
  - type: APIReference
    url: https://greenbuttonalliance.github.io/OpenESPI-GreenButton-API-Documentation/API/
  - type: Documentation
    url: https://www.greenbuttonalliance.org/green-button-connect-my-data-cmd
  - type: Documentation
    url: https://www.greenbuttonalliance.org/developer-resources
  - type: Repository
    url: https://github.com/GreenButtonAlliance/OpenAPI-Green-Button-Documentation
  - type: Repository
    url: https://github.com/GreenButtonAlliance/OpenESPI-DataCustodian-java
  - type: Specification
    url: https://www.naesb.org/espi_standards.asp
- aid: green-button-alliance:green-button-alliance-usagepoint-api
  name: Green Button Alliance Usage Point API
  description: Usage Point endpoints
  humanURL: https://greenbuttonalliance.github.io/OpenESPI-GreenButton-API-Documentation/API/
  baseURL: https://sandbox.greenbuttonalliance.org:8443/DataCustodian
  tags:
  - UsagePoint
  properties:
  - type: OpenAPI
    url: openapi/green-button-alliance-usagepoint-api-openapi.yml
  - type: Examples
    url: examples/_index.yml
  - type: APIReference
    url: https://greenbuttonalliance.github.io/OpenESPI-GreenButton-API-Documentation/API/
  - type: Documentation
    url: https://www.greenbuttonalliance.org/green-button-connect-my-data-cmd
  - type: Documentation
    url: https://www.greenbuttonalliance.org/developer-resources
  - type: Repository
    url: https://github.com/GreenButtonAlliance/OpenAPI-Green-Button-Documentation
  - type: Repository
    url: https://github.com/GreenButtonAlliance/OpenESPI-DataCustodian-java
  - type: Specification
    url: https://www.naesb.org/espi_standards.asp
common:
- type: CapabilityMap
  url: capabilities/green-button-alliance-capability-edges.yml
  name: Green Button Alliance Business Capability Map
- type: Overlay
  url: overlays/green-button-alliance-green-button-api-overlay.yaml
- type: Overlay
  url: overlays/green-button-alliance-application-information-overlay.yaml
- type: IssueTracker
  url: https://github.com/GreenButtonAlliance/OpenAPI-Green-Button-Documentation/issues
- type: License
  name: Apache-2.0
  url: https://github.com/GreenButtonAlliance/OpenAPI-Green-Button-Documentation/blob/main/LICENSE
- type: AgenticAccess
  url: agentic-access/green-button-alliance-agentic-access.yml
- type: DomainSecurity
  url: security/green-button-alliance-domain-security.yml
- type: OAuthScopes
  url: scopes/green-button-alliance-scopes.yml
- type: Authentication
  url: authentication/green-button-alliance-authentication.yml
- type: Vocabulary
  url: vocabulary/green-button-alliance-function-blocks.yml
  name: NAESB REQ.21 ESPI Function Blocks
  description: GBA's published catalog of 47 ESPI Function Blocks - simultaneously the certification test grouping and the
    OAuth scope vocabulary of Green Button Connect My Data. Transcribed from /function-blocks and /cmd-function-blocks.
- type: Conventions
  url: conventions/green-button-alliance-conventions.yml
- type: ErrorCatalog
  url: errors/green-button-alliance-problem-types.yml
- type: Lifecycle
  url: lifecycle/green-button-alliance-lifecycle.yml
- type: Conformance
  url: conformance/green-button-alliance-conformance.yml
- type: DataModel
  url: data-model/green-button-alliance-data-model.yml
- type: RateLimits
  url: rate-limits/green-button-alliance-rate-limits.yml
- type: Webhooks
  url: asyncapi/green-button-alliance-webhooks.yml
  name: Green Button Data Custodian to Third Party push notifications
  description: The CMD-mandatory push model (FB_39 Usage Data, FB_69 Retail Customer) - the Data Custodian POSTs an ESPI BatchList
    of resource URIs to the Third Party's registered thirdPartyNotifyUri, which then pulls each one. Real webhook surface;
    no AsyncAPI document is published for it.
- type: Examples
  url: examples/_index.yml
  name: Published ESPI wire-contract fixtures
- type: AgentSkill
  url: skills/_index.yml
  name: Green Button Agent Skills
- type: X-MCPServerCandidate
  url: mcp/green-button-alliance-mcp.yml
  note: 'Renamed from MCPServer 2026-09-03 (roadmap#247): the manifest self-describes as status: candidate — a tool list derived
    from the published API contracts, not an existing server. The scorer already read the manifest and reported mcp_server
    correctly; the MCPServer type was crediting the artifact-type surfaces with a server that does not exist.'
  name: Candidate MCP tool surface (derived, not published)
  description: Green Button Alliance operates no MCP server. This is an API Evangelist candidate tool set derived from the
    operations in GBA's own OpenAPI documents.
- type: ToolCrosswalk
  url: mcp/green-button-alliance-tool-crosswalk.yml
- type: Packages
  url: packages/green-button-alliance-packages.yml
  name: Package registry survey (no published client libraries)
- type: WellKnown
  url: well-known/green-button-alliance-well-known.yml
- type: LLMsTxt
  url: llms/green-button-alliance-llms.txt
- type: Sandbox
  url: sandbox/green-button-alliance-sandbox.yml
  name: Sandbox status and substitutes
- type: VulnerabilityDisclosure
  url: security/green-button-alliance-vulnerability-disclosure.yml
- type: Security
  url: https://github.com/GreenButtonAlliance/OpenESPI-GreenButton-Java/blob/main/openespi-common/SECURITY.md
  name: OpenESPI Security Policy
  description: GBA's published vulnerability-reporting policy - security@greenbuttonalliance.org, no public issues for vulnerabilities,
    acknowledgment within 48 hours and an initial assessment within one week. There is no /.well-known/security.txt.
- type: DeveloperPortal
  url: https://www.greenbuttonalliance.org/developer-resources
- type: Support
  url: https://www.greenbuttonalliance.org/faqs-technical
  name: Technical FAQs
- type: Support
  url: https://www.greenbuttonalliance.org/faqs
  name: Informational FAQs
- type: Pricing
  url: https://www.greenbuttonalliance.org/offerings/certification
  name: Certification pricing
  description: Data Custodian DMD $3,000, CMD $3,200, combined $3,700, additional 2-hour window $2,500, pre-certification
    testing $250/hour. Membership not required.
- type: SignUp
  url: https://www.greenbuttonalliance.org/register
- type: Login
  url: https://www.greenbuttonalliance.org/login
- type: TermsOfService
  url: https://www.greenbuttonalliance.org/legal
  name: Legal - Terms & Conditions, Permitted Uses, Trademark Usage, Email Security, Hosting and Analytics
- type: PrivacyPolicy
  url: https://www.greenbuttonalliance.org/privacy-policy
- type: Website
  url: https://www.greenbuttonalliance.org/
- type: About
  url: https://www.greenbuttonalliance.org/about-us
- type: Documentation
  url: https://www.greenbuttonalliance.org/developer-resources
- type: Documentation
  url: https://www.greenbuttonalliance.org/technical-info
- type: APIReference
  url: https://greenbuttonalliance.github.io/OpenESPI-GreenButton-API-Documentation/API/
- type: OpenIDConnect
  url: https://www.greenbuttonalliance.org/.well-known/openid-configuration
  name: Member Single Sign-On Discovery
  description: Anonymously fetchable OpenID Connect discovery document (HTTP 200, 2026-07-27) for the association's member
    account system. Issuer https://www.greenbuttonalliance.org, authorization code grant with PKCE S256, scopes openid/email/profile,
    RS256 id tokens. This is membership SSO, not access to any energy data.
- type: Certification
  url: https://www.greenbuttonalliance.org/testing
  name: Green Button Certification and Testing Programme
- type: Certification
  url: https://www.greenbuttonalliance.org/offerings/certification
- type: Directory
  url: https://www.greenbuttonalliance.org/directory-services
  name: Green Button Directory Services
  description: Free public browser-based directories of utilities, third-party app and service providers, and utility-platform
    providers offering Green Button. No API or machine-readable endpoint is published, and the terms state use "is not approved
    for automated retrieval, embedding, or screen-scraping of data."
- type: Specification
  url: https://www.greenbuttonalliance.org/purchase-the-standard
  name: Purchase the Standard (NAESB REQ.21 ESPI)
  description: The normative standard is not freely downloadable. Implementers must purchase NAESB REQ.21 ESPI v4.0 (ratified
    December 2023, TLS 1.3 minimum, bill images) or v3.3 from NAESB, or receive it as a NAESB member benefit.
- type: Specification
  url: https://www.naesb.org/espi_standards.asp
- type: Sandbox
  url: https://www.greenbuttonalliance.org/sandbox
  name: Green Button CMD Sandbox (unavailable)
  description: GBA states the reference-implementation sandbox is no longer provided and the replacement platform "won't be
    ready until sometime in 2026Q3". Developers are directed to the contact form to join a notification list.
- type: Tools
  url: https://dmdvalidator.greenbuttonalliance.org/
  name: Green Button DMD Validator
  description: Public Download My Data file validator linked from the developer-resources page; returned HTTP 403 to anonymous
    automated probes on 2026-07-27.
- type: GitHubOrganization
  url: https://github.com/GreenButtonAlliance
- type: LinkedIn
  url: https://www.linkedin.com/company/green-button-alliance
- type: Blog
  url: https://www.greenbuttonalliance.org/news
- type: Membership
  url: https://www.greenbuttonalliance.org/membership-information
- type: ContactUs
  url: https://www.greenbuttonalliance.org/contact-us
- type: Archive
  url: https://archive.greenbuttondata.org/
  name: greenbuttondata.org Archive
  description: Historical Green Button developer material, explicitly "frozen in time" and no longer updated; includes the
    ESPI OAuth 2.0 access-token reference at https://archive.greenbuttondata.org/espi/access_tokens/.
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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