Axle Energy

Axle Energy operates a virtual power plant (VPP) platform that connects distributed energy assets — electric vehicles, EV chargers, home batteries, and heat pumps — to electricity flexibility markets through a single unified API. Partners (carmakers, charger and battery OEMs, HVAC suppliers, and utilities) register sites and assets, prequalify and enrol them in flex propositions, stream telemetry and plug/charge events, and let end users monetise shiftable demand. The API covers authentication, meter lookup (MPAN), sites, assets, telemetry/readings, rewards/payouts, validation, and half-hourly price curves, with markets live across Great Britain, France, Germany, the Netherlands, Denmark and Sweden. React/hosted UI components and a documented outbound dispatch webhook round out the developer surface.

Axle Energy publishes 8 APIs on the APIs.io network, including 1. Authentication API, 2. Meters API, 3. Sites API, and 5 more. Tagged areas include Company, Energy, Flexibility, Virtual Power Plant, and Electric Vehicles.

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

Axle Energy’s developer surface includes documentation, API reference, getting-started guide, engineering blog, support, authentication, and 16 more developer resources.

🌐 Visit website 📡 Source on GitHub

39.9/100 developing ▬ flat Agent 46/100 agent ready Full breakdown ↓
scored 2026-08-20 · rubric v0.12.0

AccessSelf serve

8 APIs 1 MCP Servers

CompanyEnergyFlexibilityVirtual Power PlantElectric VehiclesSmart ChargingBatteriesDemand ResponseGridSustainability

Kin Score

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

Composite quality — 39.9/100 · developing

Contract Quality 13.3 / 21

Developer Ergonomics 11.2 / 17

Access Clarity 0.0 / 17

Operational Transparency 1.2 / 11

Contract Governance 1.7 / 10

Discoverability 6.9 / 9

Regulatory Posture 2.4 / 15

Agent readiness — 46/100 · 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 9 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 0 / 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

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/axle-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 →

APIs 8

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

MCP Servers 1

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

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 5

MCP servers, agent skills, and machine-readable catalogs

MCPServer

AgentSkill

LLMsTxt

WellKnown

AgenticAccess

Design & Contract 3

Pagination, idempotency, versioning, errors, and events

Idempotency

Idempotency

Lifecycle

Lifecycle

Components

Components

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

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 2

Status, limits, changes, and where to get help

Support

Support

Deprecation

Deprecation

Company 2

The organization behind the API

Blog

Blog

Website

Website

Other 1

Properties that don't map to a standard resource type

Overlay

Overlay

Source (apis.yml)

aid: axle-energy
name: Axle Energy
description: Axle Energy operates a virtual power plant (VPP) platform that connects distributed energy assets — electric
  vehicles, EV chargers, home batteries, and heat pumps — to electricity flexibility markets through a single unified API.
  Partners (carmakers, charger and battery OEMs, HVAC suppliers, and utilities) register sites and assets, prequalify and
  enrol them in flex propositions, stream telemetry and plug/charge events, and let end users monetise shiftable demand. The
  API covers authentication, meter lookup (MPAN), sites, assets, telemetry/readings, rewards/payouts, validation, and half-hourly
  price curves, with markets live across Great Britain, France, Germany, the Netherlands, Denmark and Sweden. React/hosted
  UI components and a documented outbound dispatch webhook round out the developer surface.
url: https://raw.githubusercontent.com/api-evangelist/axle-energy/refs/heads/main/apis.yml
accessModel:
  pricing: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Self-serve signup
  confidence: medium
  source:
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://cdn.prod.website-files.com/6706a319ca966248529c44be/6a4dc6c17d68be5261e80f8d_OG.png
x-type: company
x-source: vc-portfolio
x-backed-by:
- accel
x-tier: enriched
x-tier-reason: live-openapi-and-developer-surface
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-18'
tags:
- Company
- Energy
- Flexibility
- Virtual Power Plant
- Electric Vehicles
- Smart Charging
- Batteries
- Demand Response
- Grid
- Sustainability
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
apis:
- aid: axle-energy:axle-energy-1-authentication-api
  name: Axle Energy 1. Authentication API
  description: Authenticate yourself with the Axle API
  humanURL: https://docs.axle.energy/introduction
  baseURL: https://api.axle.energy
  tags:
  - 1. Authentication
  properties:
  - type: OpenAPI
    url: openapi/axle-energy-1-authentication-api-openapi.yml
  - type: ErrorCatalog
    url: errors/axle-energy-problem-types.yml
  - type: DataModel
    url: data-model/axle-energy-data-model.yml
  - type: Sandbox
    url: sandbox/axle-energy-sandbox.yml
  - type: Conventions
    url: conventions/axle-energy-conventions.yml
  - type: Conformance
    url: conformance/axle-energy-conformance.yml
  - type: Webhooks
    url: asyncapi/axle-energy-dispatch-webhooks.yml
- aid: axle-energy:axle-energy-2-meters-api
  name: Axle Energy 2. Meters API
  description: Find key info about your sites
  humanURL: https://docs.axle.energy/introduction
  baseURL: https://api.axle.energy
  tags:
  - 2. Meters
  properties:
  - type: OpenAPI
    url: openapi/axle-energy-2-meters-api-openapi.yml
  - type: ErrorCatalog
    url: errors/axle-energy-problem-types.yml
  - type: DataModel
    url: data-model/axle-energy-data-model.yml
  - type: Sandbox
    url: sandbox/axle-energy-sandbox.yml
  - type: Conventions
    url: conventions/axle-energy-conventions.yml
  - type: Conformance
    url: conformance/axle-energy-conformance.yml
  - type: Webhooks
    url: asyncapi/axle-energy-dispatch-webhooks.yml
- aid: axle-energy:axle-energy-3-sites-api
  name: Axle Energy 3. Sites API
  description: Register your sites with Axle; configure market participation
  humanURL: https://docs.axle.energy/introduction
  baseURL: https://api.axle.energy
  tags:
  - 3. Sites
  properties:
  - type: OpenAPI
    url: openapi/axle-energy-3-sites-api-openapi.yml
  - type: ErrorCatalog
    url: errors/axle-energy-problem-types.yml
  - type: DataModel
    url: data-model/axle-energy-data-model.yml
  - type: Sandbox
    url: sandbox/axle-energy-sandbox.yml
  - type: Conventions
    url: conventions/axle-energy-conventions.yml
  - type: Conformance
    url: conformance/axle-energy-conformance.yml
  - type: Webhooks
    url: asyncapi/axle-energy-dispatch-webhooks.yml
- aid: axle-energy:axle-energy-4-assets-api
  name: Axle Energy 4. Assets API
  description: Register your assets with Axle
  humanURL: https://docs.axle.energy/introduction
  baseURL: https://api.axle.energy
  tags:
  - 4. Assets
  properties:
  - type: OpenAPI
    url: openapi/axle-energy-4-assets-api-openapi.yml
  - type: ErrorCatalog
    url: errors/axle-energy-problem-types.yml
  - type: DataModel
    url: data-model/axle-energy-data-model.yml
  - type: Sandbox
    url: sandbox/axle-energy-sandbox.yml
  - type: Conventions
    url: conventions/axle-energy-conventions.yml
  - type: Conformance
    url: conformance/axle-energy-conformance.yml
  - type: Webhooks
    url: asyncapi/axle-energy-dispatch-webhooks.yml
- aid: axle-energy:axle-energy-5-data-api
  name: Axle Energy 5. Data API
  description: Send asset metrics to Axle, for analysis and optimisation purposes
  humanURL: https://docs.axle.energy/introduction
  baseURL: https://api.axle.energy
  tags:
  - 5. Data
  properties:
  - type: OpenAPI
    url: openapi/axle-energy-5-data-api-openapi.yml
  - type: ErrorCatalog
    url: errors/axle-energy-problem-types.yml
  - type: DataModel
    url: data-model/axle-energy-data-model.yml
  - type: Sandbox
    url: sandbox/axle-energy-sandbox.yml
  - type: Conventions
    url: conventions/axle-energy-conventions.yml
  - type: Conformance
    url: conformance/axle-energy-conformance.yml
  - type: Webhooks
    url: asyncapi/axle-energy-dispatch-webhooks.yml
- aid: axle-energy:axle-energy-6-rewards-api
  name: Axle Energy 6. Rewards API
  description: Determine how much your users have earned by participating with Axle; allow balance withdrawal
  humanURL: https://docs.axle.energy/introduction
  baseURL: https://api.axle.energy
  tags:
  - 6. Rewards
  properties:
  - type: OpenAPI
    url: openapi/axle-energy-6-rewards-api-openapi.yml
  - type: ErrorCatalog
    url: errors/axle-energy-problem-types.yml
  - type: DataModel
    url: data-model/axle-energy-data-model.yml
  - type: Sandbox
    url: sandbox/axle-energy-sandbox.yml
  - type: Conventions
    url: conventions/axle-energy-conventions.yml
  - type: Conformance
    url: conformance/axle-energy-conformance.yml
  - type: Webhooks
    url: asyncapi/axle-energy-dispatch-webhooks.yml
- aid: axle-energy:axle-energy-7-validation-api
  name: Axle Energy 7. Validation API
  description: Validate structured data against Axle's rules
  humanURL: https://docs.axle.energy/introduction
  baseURL: https://api.axle.energy
  tags:
  - 7. Validation
  properties:
  - type: OpenAPI
    url: openapi/axle-energy-7-validation-api-openapi.yml
  - type: ErrorCatalog
    url: errors/axle-energy-problem-types.yml
  - type: DataModel
    url: data-model/axle-energy-data-model.yml
  - type: Sandbox
    url: sandbox/axle-energy-sandbox.yml
  - type: Conventions
    url: conventions/axle-energy-conventions.yml
  - type: Conformance
    url: conformance/axle-energy-conformance.yml
  - type: Webhooks
    url: asyncapi/axle-energy-dispatch-webhooks.yml
- aid: axle-energy:axle-energy-8-examples-api
  name: Axle Energy 8. Examples API
  description: Get example data for testing
  humanURL: https://docs.axle.energy/introduction
  baseURL: https://api.axle.energy
  tags:
  - 8. Examples
  properties:
  - type: OpenAPI
    url: openapi/axle-energy-8-examples-api-openapi.yml
  - type: ErrorCatalog
    url: errors/axle-energy-problem-types.yml
  - type: DataModel
    url: data-model/axle-energy-data-model.yml
  - type: Sandbox
    url: sandbox/axle-energy-sandbox.yml
  - type: Conventions
    url: conventions/axle-energy-conventions.yml
  - type: Conformance
    url: conformance/axle-energy-conformance.yml
  - type: Webhooks
    url: asyncapi/axle-energy-dispatch-webhooks.yml
common:
- type: Overlay
  url: overlays/axle-energy-api-overlay.yaml
- type: DeveloperPortal
  url: https://docs.axle.energy/
- type: Documentation
  url: https://docs.axle.energy/introduction
- type: APIReference
  url: https://docs.axle.energy/api-reference
- type: GettingStarted
  url: https://docs.axle.energy/components/getting-started/introduction
- type: Blog
  url: https://www.axle.energy/blog
- type: GitHubOrganization
  url: https://github.com/axle-energy
- type: Support
  url: mailto:support@axle.energy
- type: Idempotency
  url: conventions/axle-energy-conventions.yml
- type: Deprecation
  url: lifecycle/axle-energy-lifecycle.yml
- type: Lifecycle
  url: lifecycle/axle-energy-lifecycle.yml
- type: Packages
  url: packages/axle-energy-packages.yml
- type: SDKs
  url: packages/axle-energy-packages.yml
- type: Components
  url: components/axle-energy-components.yml
- type: MCPServer
  url: mcp/axle-energy-mcp.yml
- type: AgentSkill
  url: skills/_index.yml
- type: LLMsTxt
  url: llms/axle-energy-llms.txt
- type: WellKnown
  url: well-known/axle-energy-well-known.yml
- type: DomainSecurity
  url: security/axle-energy-domain-security.yml
- type: AgenticAccess
  url: agentic-access/axle-energy-agentic-access.yml
- type: Authentication
  url: authentication/axle-energy-authentication.yml
- type: Website
  url: https://www.axle.energy/
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence