Constellation Energy website screenshot

Constellation Energy

Constellation Energy Corporation is a Fortune 500 clean-energy producer and competitive retail electricity and natural gas supplier in the United States, generating power from a fleet of nuclear, hydro, wind, and solar facilities. Constellation does not publish a public developer portal; programmatic interactions are delivered to enterprise and large commercial customers through the Energy Manager platform (account-managed onboarding, no public API specifications) and consumer interactions are handled through the My Constellation account portal. EDI 867 (usage) and 810 (invoice) remain the most common machine-to-machine integration paths and are arranged on a contract-by-contract basis.

Constellation Energy is profiled on the APIs.io network. Tagged areas include Clean Energy, Electricity, Energy, Fortune 500, and Hydro.

Constellation Energy’s developer surface includes support and 11 more developer resources.

🌐 Visit website 📡 Source on GitHub
20.4/100 emerging ▬ flat Agent 7/100 human only Full breakdown ↓
scored 2026-07-27 · rubric v0.5
AccessFree
0 APIs
Clean EnergyElectricityEnergyFortune 500HydroNatural GasNuclearSolarUtilityWind

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5
Composite quality — 20.4/100 · emerging
Contract Quality 0.0 / 25
Developer Ergonomics 0.9 / 20
Commercial Clarity 10.0 / 20
Operational Transparency 2.7 / 13
Governance 0.0 / 12
Discoverability 6.8 / 10
Agent readiness — 7/100 · human only
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 15
MCP Server 0 / 12
Machine-Readable Auth 0 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 0 / 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
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/constellation-energy: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

Open Collections 1

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

Constellation Energy API

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Constellation Energy Plans Pricing

1 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Constellation Energy Rate Limits

2 limits

RATE LIMITS

FinOps 1

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

Constellation Energy Finops

FINOPS

Security Posture 1

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

Constellation Energy Domain Security

TLSv1.2 · DMARC

SECURITY

Resources

Get Started 1

Portal, sign-up, and the first successful call

My Constellation Portal
My Constellation Portal

Build 1

SDKs, sample code, and the tooling you integrate with

Energy Management Tools
Energy Management Tools

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support
Support

Commercial 2

Pricing, plans, and the legal terms of use

PrivacyPolicy
PrivacyPolicy
 TermsOfService
TermsOfService

Company 4

The organization behind the API

LinkedIn
LinkedIn
 Website
Website
 Investor Relations
Investor Relations
 Careers
Careers

Other 2

Properties that don't map to a standard resource type

Customer Site
Customer Site
 Energy Manager
Energy Manager

Source (apis.yml)

apis.yml Raw ↑ 
aid: constellation-energy
name: Constellation Energy
url: https://raw.githubusercontent.com/api-evangelist/constellation-energy/refs/heads/main/apis.yml
tags:
- Clean Energy
- Electricity
- Energy
- Fortune 500
- Hydro
- Natural Gas
- Nuclear
- Solar
- Utility
- Wind
type: Index
accessModel:
  pricing: free
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Free
  confidence: medium
  source:
  - plans
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/constellation-energy.png
access: 3rd-Party
created: '2026-03-21'
modified: '2026-04-29'
position: Consumer
specificationVersion: '0.19'
kind: company
description: Constellation Energy Corporation is a Fortune 500 clean-energy producer and competitive retail electricity and
  natural gas supplier in the United States, generating power from a fleet of nuclear, hydro, wind, and solar facilities.
  Constellation does not publish a public developer portal; programmatic interactions are delivered to enterprise and large
  commercial customers through the Energy Manager platform (account-managed onboarding, no public API specifications) and
  consumer interactions are handled through the My Constellation account portal. EDI 867 (usage) and 810 (invoice) remain
  the most common machine-to-machine integration paths and are arranged on a contract-by-contract basis.
apis: []
common:
- type: DomainSecurity
  url: security/constellation-energy-domain-security.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/constellation-energy
- type: Website
  url: https://www.constellationenergy.com
- type: Customer Site
  url: https://www.constellation.com
- type: My Constellation Portal
  url: https://my-account.constellationconnect.com
- type: Energy Manager
  url: https://energymanager.constellation.com
- type: Energy Management Tools
  url: https://www.constellation.com/why/energy-management-tools.html
- type: Investor Relations
  url: https://investors.constellationenergy.com
- type: Careers
  url: https://jobs.constellationenergy.com
- type: PrivacyPolicy
  url: https://www.constellationenergy.com/privacy.html
- type: TermsOfService
  url: https://www.constellation.com/terms-of-use.html
- type: Support
  url: https://www.constellation.com/about-us/contact-us.html
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com