n3rgy

n3rgy data limited is a United Kingdom smart-energy data platform, registered in England (No. 11712674) and owned by Smart Metering Systems Ltd. It sits between Great Britain's mandated smart-metering infrastructure — the DCC network, SMETS2 home area networks (HANs), and the ESME/GSME electricity and gas meters behind them — and the organisations that want to read from it, letting a business collect consumption, production, and tariff data for a property (addressed by MPAN/MPRN, collectively MPxN) once the occupant has granted consent, without that business having to become a DCC user in its own right. Its API posture is public in documentation and closed in access: a genuinely anonymous MkDocs developer guide and a complete OpenAPI 3.0.1 contract for the Customer Service API V2 are served to anyone, while every operation is x-api-key gated and live keys must be enabled by the n3rgy back office after a business sign-up. Britain mandated the metering infrastructure, not a consumer data right, so nothing here is a Consumer Data Right or Green Button implementation — n3rgy publishes no open grid or market data at all, and the formerly public consumer API is, by the company's own statement, no longer available.

n3rgy publishes 1 API on the APIs.io network: Customer Service API V2. Tagged areas include Energy, United Kingdom, Utilities, Smart Metering, and Electricity.

The n3rgy catalog on APIs.io includes 1 event-driven AsyncAPI specification.

n3rgy’s developer surface includes authentication, documentation, signup flow, developer portal, pricing, support, changelog, and 15 more developer resources.

🌐 Visit website 📡 Source on GitHub

52.0/100 developing ▬ flat Agent 47/100 agent ready Full breakdown ↓
scored 2026-08-20 · rubric v0.12.0

1 APIs 1 MCP Servers

EnergyUnited KingdomUtilitiesSmart MeteringElectricityGasSmart Meter DataConsentMeteringEnergy Data

Kin Score

Kin Score How this is scored →
scored 2026-08-20 · rubric v0.12.0

Composite quality — 52.0/100 · developing

Contract Quality 13.4 / 21

Developer Ergonomics 4.5 / 17

Access Clarity 6.5 / 17

Operational Transparency 5.5 / 11

Contract Governance 1.7 / 10

Discoverability 7.4 / 9

Regulatory Posture 9.1 / 15

Agent readiness — 47/100 · 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 0 / 5

Well-Known Catalog 4 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

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/. This rating is computed from github.com/api-evangelist/n3rgy: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 1

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

n3rgy Customer Service API V2

The consent-scoped smart-meter data API of the n3rgy platform. A business holding a valid n3rgy API key lists the properties (MPxNs) it has active consent for, discovers which u...

MCP Servers 1

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

n3rgy MCP Server

n3rgy operates no MCP server. This is a CANDIDATE tool surface derived mechanically from the 26 operations of the Customer Service API V2 so an agent builder can stand one up wi...

MCP SERVER

Rate Limits 1

Documented rate limits and quota policies.

Examples 7

Example request and response payloads for these APIs.

Scroll for all 7

AGENTIC

Resources

Get Started 4

Portal, sign-up, and the first successful call

SignUp

SignUp

Login

Portal

Portal

DeveloperPortal

DeveloperPortal

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

WellKnown

WellKnown

LLMsTxt

LLMsTxt

Design & Contract 2

Pagination, idempotency, versioning, errors, and events

Conformance

Conformance

Lifecycle

Lifecycle

Build 2

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Packages

Packages

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 3

Status, limits, changes, and where to get help

Support

Support

HelpCenter

HelpCenter

ChangeLog

ChangeLog

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

About

About

Source (apis.yml)

aid: n3rgy
url: https://raw.githubusercontent.com/api-evangelist/n3rgy/refs/heads/main/apis.yml
name: n3rgy
kind: company
description: 'n3rgy data limited is a United Kingdom smart-energy data platform, registered in England (No. 11712674) and
  owned by Smart Metering Systems Ltd. It sits between Great Britain''s mandated smart-metering infrastructure — the DCC network,
  SMETS2 home area networks (HANs), and the ESME/GSME electricity and gas meters behind them — and the organisations that
  want to read from it, letting a business collect consumption, production, and tariff data for a property (addressed by MPAN/MPRN,
  collectively MPxN) once the occupant has granted consent, without that business having to become a DCC user in its own right.
  Its API posture is public in documentation and closed in access: a genuinely anonymous MkDocs developer guide and a complete
  OpenAPI 3.0.1 contract for the Customer Service API V2 are served to anyone, while every operation is x-api-key gated and
  live keys must be enabled by the n3rgy back office after a business sign-up. Britain mandated the metering infrastructure,
  not a consumer data right, so nothing here is a Consumer Data Right or Green Button implementation — n3rgy publishes no
  open grid or market data at all, and the formerly public consumer API is, by the company''s own statement, no longer available.'
image: https://www.n3rgy.com/wp-content/uploads/2023/03/Group.png
tags:
- Energy
- United Kingdom
- Utilities
- Smart Metering
- Electricity
- Gas
- Smart Meter Data
- Consent
- Metering
- Energy Data
created: '2026-07-27'
modified: '2026-07-27'
specificationVersion: '0.23'
apis:
- aid: n3rgy:customer-service-api-v2
  name: n3rgy Customer Service API V2
  description: The consent-scoped smart-meter data API of the n3rgy platform. A business holding a valid n3rgy API key lists
    the properties (MPxNs) it has active consent for, discovers which utilities (electricity, gas) and reading types (consumption,
    production, tariff) are available for each, and retrieves the underlying half-hourly data. The same contract also covers
    meter update-frequency control, MPxN and address lookup, read-inventory / firmware and last-communications checks, on-demand
    "update now" fetches, push-notification configuration, and an upload/devices surface for non-DCC device data. Every operation
    is secured with the x-api-key header; consent-bearing operations additionally validate that an active consent exists for
    the HAN behind the given MPxN. A free sandbox with demonstration MPxNs mirrors the live contract on a separate host.
  humanURL: https://customer-api-user-manuals.data.n3rgy.com/
  baseURL: https://api-v2.data.n3rgy.com
  tags:
  - Smart Metering
  - Consumption
  - Tariff
  - Consent
  - Electricity
  - Gas
  properties:
  - type: OpenAPI
    url: openapi/n3rgy-customer-service-api-v2-openapi.yaml
  - type: Documentation
    url: https://customer-api-user-manuals.data.n3rgy.com/
  - type: APIReference
    url: https://customer-api-user-manuals.data.n3rgy.com/api-specification/
  - type: Authentication
    url: https://customer-api-user-manuals.data.n3rgy.com/authentication/
  - type: Documentation
    url: https://customer-api-user-manuals.data.n3rgy.com/requests/
  - type: Documentation
    url: https://customer-api-user-manuals.data.n3rgy.com/schemas/
  - type: Sandbox
    url: https://customer-api-user-manuals.data.n3rgy.com/sandbox-requests/
  - type: Documentation
    url: https://customer-api-user-manuals.data.n3rgy.com/electricity-format/
  - type: Documentation
    url: https://customer-api-user-manuals.data.n3rgy.com/gas-format/
  - type: ChangeLog
    url: https://customer-api-user-manuals.data.n3rgy.com/change-log/
  - type: SignUp
    url: https://data.n3rgy.com/business-sign-up
  - type: Overlay
    url: overlays/n3rgy-customer-service-api-v2-overlay.yaml
  - type: Sandbox
    url: sandbox/n3rgy-sandbox.yml
  - type: Conventions
    url: conventions/n3rgy-conventions.yml
  - type: ErrorCatalog
    url: errors/n3rgy-problem-types.yml
  - type: RateLimits
    url: rate-limits/n3rgy-rate-limits.yml
  - type: Examples
    url: examples/_index.yml
  - type: DataModel
    url: data-model/n3rgy-data-model.yml
  - type: Webhooks
    url: asyncapi/n3rgy-push-notifications-webhooks.yml
  - type: MCPServer
    url: mcp/n3rgy-mcp.yml
  - type: ToolCrosswalk
    url: mcp/n3rgy-tool-crosswalk.yml
  - type: AgentSkill
    url: skills/_index.yml
common:
- type: AgenticAccess
  url: agentic-access/n3rgy-agentic-access.yml
- type: DomainSecurity
  url: security/n3rgy-domain-security.yml
- type: Authentication
  url: authentication/n3rgy-authentication.yml
- type: Website
  url: https://www.n3rgy.com/
- type: Documentation
  url: https://customer-api-user-manuals.data.n3rgy.com/
- type: SignUp
  url: https://data.n3rgy.com/business-sign-up
- type: Login
  url: https://www.n3rgy.com/business-login/
- type: Portal
  url: https://data.n3rgy.com/consumer-login
- type: Pricing
  url: https://www.n3rgy.com/business/
- type: TermsOfService
  url: https://www.n3rgy.com/wp-content/uploads/2023/04/N3rgyDataLimited.pdf
- type: PrivacyPolicy
  url: https://www.n3rgy.com/privacy/
- type: Support
  url: https://www.n3rgy.com/contact-us/
- type: About
  url: https://www.n3rgy.com/about-us/
- type: GitHubOrganization
  url: https://github.com/n3rgy
- type: DeveloperPortal
  url: https://customer-api-user-manuals.data.n3rgy.com/
- type: HelpCenter
  url: https://support.n3rgy.com/support/home
- type: Packages
  url: packages/n3rgy-packages.yml
- type: WellKnown
  url: well-known/n3rgy-well-known.yml
- type: LLMsTxt
  url: llms/n3rgy-llms.txt
- type: Conformance
  url: conformance/n3rgy-conformance.yml
- type: Lifecycle
  url: lifecycle/n3rgy-lifecycle.yml
- type: ChangeLog
  url: changelog/n3rgy-changelog.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

n3rgy

Kin Score

APIs 1

n3rgy Customer Service API V2

MCP Servers 1

n3rgy MCP Server

Rate Limits 1

N3Rgy Rate Limits

Event Specifications 1

N3Rgy Push Notifications Webhooks

Examples 7

N3Rgy Error Bad Request Example

N3Rgy Error Forbidden Example

N3Rgy Push Configuration Request Example

N3Rgy Push Configuration Response Example

N3Rgy Push Status Response Example

N3Rgy Retrieve Consented Mpxns Empty Example

N3Rgy Retrieve Consented Mpxns Example

Security Posture 2

N3Rgy Authentication

N3Rgy Domain Security

Agentic Access 1

N3Rgy Agentic Access