HVAC Builder

HVAC Builder provides a web‑based platform to design, solve, and simulate custom HVAC systems. Users can build 3‑D models, run thermodynamic calculations, and simulate a full year of operation against real weather data. The service offers a free tier and paid plans with additional compute tokens, saved projects, and advanced features. It targets engineers, architects, and building managers seeking accessible HVAC analysis without installing desktop software.

HVAC Builder is listed with 2 APIs on the APIs.io network. Tagged areas include HVAC, Engineering, Simulation, Web App, and Free Tier.

The HVAC Builder catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

HVAC Builder’s developer surface includes changelog, API reference, documentation, pricing, and 12 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

30.2/100 thin Agent 34/100 agent ready Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

AccessFreemium

2 APIs

HVAC Engineering Simulation Web App Free Tier

Kin Score

Kin Score How this is scored →
scored 2026-11-13 · rubric v0.28.0

Composite quality — 30.2/100 · thin

Contract Quality 5.0 / 21

Developer Ergonomics 2.8 / 17

Access Clarity 8.7 / 17

Operational Transparency 1.6 / 11

Contract Governance 2.2 / 10

Discoverability 4.9 / 9

Regulatory Posture 2.8 / 15

Agent readiness — 34/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 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 5 / 5

Registration Without a Human 6 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 0 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) 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.

Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

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/.

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Agent readiness — checks not met, largest first (exact, from this profile):

Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author Ask about this →
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented) Ask about this →
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes Ask about this →
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0 Ask about this →
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented) Ask about this →
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link Ask about this →

8 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Contract Quality scores 23.5 — up to +19.1 composite points Ask about this →
Developer Ergonomics scores 16.7 — up to +16.7 composite points Ask about this →
Operational Transparency scores 14.3 — up to +11.1 composite points Ask about this →

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

Not sure how this applies to your stack? Ask about any one item. Kin Lane reads every question, looks at your profile and your situation, and replies with what a fix would take — scoped to that one area, priced up front, yours whether you ship it or not. Ask a question →

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 the provider profile at artifacts.apis.io/hvacbuilder-app/apis.yml: open an issue on github.com/api-evangelist/hvacbuilder-app to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Standards implemented 3

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

Model Context Protocol (MCP)

measured — observed by APIs.io (documented)

OAuth 2.0 Protected Resource Metadata

measured — observed by APIs.io (verified)

Dynamic Client Registration

measured — observed by APIs.io (published)

APIs 2

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

HVAC Builder API

The HVAC Builder API provides REST endpoints for managing projects, retrieving system configurations, and accessing simulation results. Documentation is available at the referen...

HVAC Builder API

HVAC Builder API as documented publicly: 36 operations. Contract generated from the documentation by API Evangelist (2026-11-12); not the provider's own document.

HVAC Builder API pricing

Prices published by HVAC Builder, read 2026-11-12 from hvacbuilder.app/pricing.

Plan	Price
Free	$0
Starter	$15/mo
Professional	$39/mo
Business	$79/mo
Enterprise	On request

Plan details, limits and sources →

Pricing Plans 1

Published pricing tiers and plan structures.

HVAC Builder Plans Pricing

5 plans

PLANS

Semantic Vocabularies 1

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

Hvacbuilder App Context

19 classes · 40 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs. Counts are the severity each rule declares, not results of running them.

HVAC Builder API Rules

36 rules · 34 error-severity 1 warn-severity 1 info-severity

SPECTRAL

JSON Schema 6

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

GetApiMeResponse

4 properties

JSON SCHEMA

PostApiRateIeerRequest

4 properties

JSON SCHEMA

PostApiRateIeerResponse

4 properties

JSON SCHEMA

PostApiReportChartRequest

4 properties

JSON SCHEMA

PostApiReportRequest

6 properties

JSON SCHEMA

PostApiWeatherGenerateRequest

4 properties

JSON SCHEMA

Security Posture 1

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

HVAC Builder Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Documentation 2

Reference material describing how the API behaves

APIReference

APIReference

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

WellKnown

WellKnown

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

DataModel

Conformance

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

ChangeLog

ChangeLog

Commercial 4

Pricing, plans, and the legal terms of use

Plans

TermsOfService

PrivacyPolicy

Pricing

Company 1

The organization behind the API

Website

Website

Other 1

Properties that don't map to a standard resource type

Hosts

Hosts

Source (apis.yml)

aid: hvacbuilder-app
name: HVAC Builder
accessModel:
  pricing: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: low
  probe_state: unreadable
  source:
  - plans
  - security
  generated: '2026-11-13'
  method: derived
image: https://hvacbuilder.app/shots/og/home.jpg
description: HVAC Builder provides a web‑based platform to design, solve, and simulate custom HVAC systems. Users can build
  3‑D models, run thermodynamic calculations, and simulate a full year of operation against real weather data. The service
  offers a free tier and paid plans with additional compute tokens, saved projects, and advanced features. It targets engineers,
  architects, and building managers seeking accessible HVAC analysis without installing desktop software.
url: https://artifacts.apis.io/hvacbuilder-app/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-11-12 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-11-11'
modified: '2026-11-11'
tags:
- HVAC
- Engineering
- Simulation
- Web App
- Free Tier
tags_raw:
- HVAC
- Engineering
- Simulation
- WebApp
- FreeTier
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Plans
  url: plans/hvacbuilder-app-plans-pricing.yml
- type: Spectral
  url: rules/hvacbuilder-app-rules.yml
- type: JSONLD
  url: json-ld/hvacbuilder-app-context.jsonld
- type: Vocabulary
  url: vocabulary/hvacbuilder-app-vocabulary.yml
- type: DataModel
  url: data-model/hvacbuilder-app-data-model.yml
- type: Conformance
  url: conformance/hvacbuilder-app-conformance.yml
- type: WellKnown
  url: well-known/hvacbuilder-app-well-known.yml
- type: Hosts
  url: hosts/hvacbuilder-app-hosts.yml
- type: TermsOfService
  url: https://hvacbuilder.app/terms
- type: PrivacyPolicy
  url: https://hvacbuilder.app/privacy
- type: ChangeLog
  url: https://hvacbuilder.app/changelog
- type: APIReference
  url: https://hvacbuilder.app/reference
- type: DomainSecurity
  url: security/hvacbuilder-app-domain-security.yml
- type: Website
  url: https://hvacbuilder.app/
- type: Documentation
  url: https://hvacbuilder.app/docs
- type: Pricing
  url: https://hvacbuilder.app/pricing
apis:
- name: HVAC Builder API
  description: The HVAC Builder API provides REST endpoints for managing projects, retrieving system configurations, and accessing
    simulation results. Documentation is available at the reference page.
  humanURL: https://hvacbuilder.app/reference
  aid: hvacbuilder-app:hvac-builder-api
- aid: hvacbuilder-app:hvacbuilder-app-api
  name: HVAC Builder API
  description: 'HVAC Builder API as documented publicly: 36 operations. Contract generated from the documentation by API Evangelist
    (2026-11-12); not the provider''s own document.'
  humanURL: https://hvacbuilder.app/reference
  properties:
  - type: OpenAPI
    url: openapi/_ae-authored/hvacbuilder-app-openapi-generated.yml
    x-provenance: generated
  - type: JSONSchema
    url: json-schema/hvacbuilder-app-post-api-rate-ieer-response-schema.json
  - type: JSONSchema
    url: json-schema/hvacbuilder-app-post-api-report-request-schema.json
  - type: JSONSchema
    url: json-schema/hvacbuilder-app-post-api-rate-ieer-request-schema.json
  - type: JSONSchema
    url: json-schema/hvacbuilder-app-post-api-weather-generate-request-schema.json
  - type: JSONSchema
    url: json-schema/hvacbuilder-app-post-api-report-chart-request-schema.json
  - type: JSONSchema
    url: json-schema/hvacbuilder-app-get-api-me-response-schema.json
x-coverage:
  state: unreadable
  reason: js-rendered-docs
  detail: Documentation pages are rendered via JavaScript, preventing machine‑readable spec extraction.
  evidence:
  - url: https://hvacbuilder.app/reference
    status: 200
x-enrichment:
  date: '2026-11-12'
  status: enriched
  artifacts_added: 25
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

HVAC Builder API — frequently asked questions

Does HVAC Builder have an API?

Yes. APIs.io lists 2 APIs from HVAC Builder, including HVAC Builder API and HVAC Builder API.

Is there an OpenAPI specification for the HVAC Builder API?

Yes. APIs.io indexes 1 OpenAPI specification for HVAC Builder, each linked for download from this page.

How much does the HVAC Builder API cost?

HVAC Builder publishes its prices; its Free plan is $0 as of 2026-11-12. APIs.io lists 5 pricing plans for HVAC Builder, with each plan's price, limits and inclusions under Pricing on this page.

Is the HVAC Builder API ready for AI agents?

HVAC Builder has a Kin Score of 30.2 out of 100 (thin) and an Agent Readiness score of 33.9 (agent-ready), scored by API Evangelist on 2026-11-13.

Work with this as data

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MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

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Tools for providers

9 MCP tools reach this

find_providersBrowse and filter every provider in the catalog.
get_provider_artifactsEvery artifact this provider publishes, grouped by type.
get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

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