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SPAN

SPAN is a San Francisco-based home energy technology company building smart electrical panels that replace traditional residential breaker boxes with a software-defined, controllable, and metered panel. SPAN Panel provides whole-home real-time power and energy metering, per-circuit monitoring and remote relay control, grid/islanding state management for whole-home backup with solar and energy storage, EV charging coordination via SPAN Drive, and a mobile app for energy management. As of the SPAN Panel firmware r202603 release (Q1 2026), SPAN exposes a public-beta on-premise SPAN API for software integrations between SPAN Panel and other devices on the home Local Area Network. The SPAN API is a real, documented HTTP + MQTT/Homie surface that runs directly on the panel — there is no cloud-hosted developer endpoint. The REST surface provides authentication, system status, Wi-Fi setup, panel state, per-circuit control, panel grid relay, energy storage state-of-energy, and emergency reconnect operations. The publish/subscribe surface uses the Electrification Bus (eBus) framework and Homie Convention over MQTT for streaming real-time panel state, per-circuit telemetry, and control of relays. SPAN API is licensed for personal, non-commercial use under MIT-0 for docs and example code; commercial / fleet use requires the separately licensed SPAN Fleet Manager.

agent ready

Real signal across most facets with visible, nameable gaps — the contract exists but is thin, or the portal is good while governance and commercial terms are absent.

Kin Score

API Evangelist profiles SPAN the way a machine reads it — 39 machine-readable artifacts across 9 APIs, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.

Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — SPAN scores 57.8/100 (developing), with a separate agent-readiness read of 54/100 (agent ready). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.

Kin Score

This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance.

Kin Score Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5
Composite quality — 57.8/100 · developing
Contract Quality 17.0 / 25
Developer Ergonomics 10.0 / 20
Commercial Clarity 12.1 / 20
Operational Transparency 2.7 / 13
Governance 7.3 / 12
Discoverability 8.8 / 10
Agent readiness — 54/100 · agent ready
Machine-Readable Contract 18 / 18
Agentic Access Contract 15 / 15
MCP Server 0 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 7 / 7
Typed Event Surface 6 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3

How we profile SPAN

Each block below is one kind of artifact we hold for SPAN. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.

APIs 9

Each API is captured as its own OpenAPI definition — every operation, parameter, and response. This is the single most useful machine-readable description of what an API does, and it's what lets us score, lint, mock, and generate against it without asking the provider for anything.

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

SPAN eBus MQTT API

Publish/subscribe streaming API hosted on SPAN Panel using the Electrification Bus (eBus) integration framework and the Homie Convention. SPAN Panel hosts an MQTT broker accessi...

SPAN Auth API

The Auth API from SPAN — 3 operation(s) for auth.

SPAN Circuits API

The Circuits API from SPAN — 2 operation(s) for circuits.

SPAN Islanding State API

The Islanding State API from SPAN — 1 operation(s) for islanding state.

SPAN Panel API

The Panel API from SPAN — 5 operation(s) for panel.

SPAN Spaces API

The Spaces API from SPAN — 2 operation(s) for spaces.

SPAN Status API

The Status API from SPAN — 1 operation(s) for status.

SPAN Storage API

The Storage API from SPAN — 2 operation(s) for storage.

SPAN Wifi API

The Wifi API from SPAN — 2 operation(s) for wifi.

Scroll within the panel for all 9 ·

Open Collections 1

Open, tool-agnostic collections carry the same runnable value as Postman without locking you to one client — the portable, forkable form of the same exercise.

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

Span

OPEN COLLECTION

Pricing Plans 1

Pricing is part of the interface. Machine-readable plans tell you what a tier costs and includes before you commit — one of the six things the Kin Score reads for commercial clarity.

Published pricing tiers and plan structures.

Span Io Plans Pricing

3 plans

PLANS

Rate Limits 1

Rate limits are the difference between a demo that works and a production integration that doesn't fall over. Publishing them is an operational-transparency signal — and a hard requirement for any agent that plans its own throughput.

Documented rate limits and quota policies.

Span Io Rate Limits

0 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals let a buyer model the financial operations of an API before it's live. We profile them for the same reason we profile pricing: the money is part of the contract.

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

Features 16

The notable capabilities this provider advertises, captured as structured features so they can be searched and compared instead of read one landing page at a time.

Notable capabilities this provider offers.

SPAN Panel — software-defined smart electrical panel replacing traditional residential breaker boxes
Whole-home and per-circuit real-time power and energy metering
Per-circuit remote relay control with named circuits and priority groups
Grid / islanding state management for whole-home backup with solar and energy storage
SPAN Drive — integrated Level 2 EV charging coordinated with the panel
SPAN Home mobile and on-premise apps for energy management and monitoring
On-premise SPAN API hosted on the panel — REST + MQTT, LAN-only, no cloud
HTTP Bearer JWT authentication minted by the panel and bound to a named API client
REST resources for circuits, panel state, panel grid relay, panel meter and power, islanding state, energy storage SoE and nice-to-have thresholds, Wi-Fi scan/connect, system status, emergency reconnect
MQTT pub/sub via the Electrification Bus (eBus) framework using the Homie Convention
mDNS-advertised local discovery (`_span._tcp`, `_span-api._tcp`, `_mqtt._tcp`) for zero-config integration
JSON Schema for Homie device descriptions and mDNS service records
Reference shell + Python scripts (span-discover, span-auth, span-curl, span-mqtt-sub, span-mdns-query)
Public beta — initial firmware r202603 for SPAN Panel MAIN 32, rolling out to MAIN 16 / MLO 24 / MAIN 40 / MLO 48 in H2 2026
Commercial / fleet integrations served separately via SPAN Fleet Manager licensing
SPAN Utilities — distributed energy resource (DER) management platform for utility partners

Scroll within the panel for all 16 ·

Event Specifications 1

Not every API is request/response. AsyncAPI describes the event-driven and streaming side — the webhooks and channels — so the asynchronous half of the interface is documented the same way the synchronous half is.

AsyncAPI definitions for this provider's event-driven and streaming APIs.

SPAN eBus MQTT API

Publish/subscribe streaming API hosted directly on SPAN Panel using the Electrification Bus (eBus) integration framework and the Homie Convention for MQTT topic and payload stru...

ASYNCAPI

Semantic Vocabularies 1

JSON-LD contexts give the data shared meaning across APIs. We profile them because semantics are what let a machine reconcile 'customer' here with 'customer' somewhere else.

JSON-LD contexts and semantic vocabularies used across these APIs.

Span Context

18 classes · 5 properties

JSON-LD

Spectral Rules 2

Governance rulesets we run against this provider's specs — the automated checks behind parts of the score. Profiling them makes the quality bar explicit and re-runnable, not a matter of opinion.

SPAN API Rules

8 rules · 1 errors · 6 warnings

SPECTRAL

SPAN API Rules

5 rules · 1 errors · 4 warnings

SPECTRAL

JSON Schema 2

Standalone JSON Schema definitions describe the data models behind the API. We profile them so the shapes are validatable on their own — useful long after a single request is forgotten.

Standalone JSON Schema definitions for this provider's data models.

Span Homie

0 properties

JSON SCHEMA

Span Mdns Services

0 properties

JSON SCHEMA

Security Posture 3

Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.

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

Span Io Authentication

http · 1 scheme

SECURITY

Span Io Domain Security

TLSv1.3 · DMARC

SECURITY

Span Io Vulnerability Disclosure

disclosure policy published

SECURITY

Agentic Access 1

An x-agentic-access contract marks which operations are safe for an agent to run on its own and which need a human in the loop. It is the difference between an API an agent can use and one it can use safely.

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

Span Io Agentic Access

24 operations · 9 acting · 1 human-in-the-loop

24 operations · 9 acting

AGENTIC

Resources

Every other property we hold for SPAN — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.

Get Started 1

Portal, sign-up, and the first successful call

Documentation 2

Reference material describing how the API behaves

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

Build 5

SDKs, sample code, and the tooling you integrate with

Learn 1

Tutorials, courses, talks, and written guidance

← All providers · Data indexed from github.com/api-evangelist/span-io · machine-readable index on apis.io