Buildxact

Buildxact is a Melbourne, Australia-headquartered construction estimating and project management SaaS for residential builders, remodelers, trade contractors, and building-material suppliers. Founded in 2011, the company operates regional offices in Austin, Texas (North America), and serves customers across Australia, New Zealand, the United Kingdom, the United States, and Canada. The platform spans the full residential job lifecycle — lead capture, digital takeoffs, AI-assisted estimating ("Blu"), customer quoting and e-signatures, supplier/dealer price-list integration, purchase orders, scheduling (Gantt), timesheets, variations/change orders, invoicing, and two-way accounting sync with Xero and QuickBooks Online. Buildxact exposes a public REST API and webhook surface at developer.buildxact.com, available to Merchant and Manufacturer partners as well as customer subscribers, using a Microsoft Azure API Management gateway (Ocp-Apim-Subscription-Key + bearer token). Endpoints support OData filtering and sorting, with a separate UAT/staging environment. In 2024, Autodesk announced an agreement to acquire Buildxact, positioning the product as a residential construction front-end alongside Autodesk's broader AEC portfolio.

Buildxact publishes 5 APIs on the APIs.io network, including Webhooks, Authentication API, Estimate Items API, and 2 more. Tagged areas include Construction, Residential Construction, Construction Management, Estimating, and Takeoffs.

The Buildxact catalog on APIs.io includes 1 event-driven AsyncAPI specification, 1 JSON-LD context, and 3 Spectral governance rulesets.

Buildxact’s developer surface includes authentication, pricing, engineering blog, GitHub presence, and 20 more developer resources.

🌐 Visit website 📡 Source on GitHub

52.5/100 developing ▬ flat Agent 21/100 agent aware saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

AccessFreemiumSelf serveFree trial⚡ Free to try

1 APIs

Construction Residential Construction Construction Management EstimatingTakeoffsJob Management Project Management Quoting Scheduling Purchase Orders InvoicingSupplier IntegrationMaterial PricingBuildersRemodelersTrades Software-as-a-Service Australia Autodesk

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 52.5/100 · developing

Contract Quality 16.2 / 23

Developer Ergonomics 6.9 / 18

Access Clarity 13.3 / 18

Operational Transparency 3.1 / 12

Contract Governance 3.1 / 11

Discoverability 5.3 / 9

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 21/100 · agent aware

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 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

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Create-or-Update Ergonomics applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

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 github.com/api-evangelist/buildxact: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 5

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

Buildxact Webhooks

Buildxact's webhook surface lets partner and customer integrations receive real-time notifications when events occur inside the construction-management platform — including Esti...

Buildxact Authentication API

First-party login and bearer token refresh.

Buildxact Estimate Items API

Line items inside an estimate (materials, labor, assemblies).

Buildxact Estimates API

Construction estimates — the top-level pricing document for a job.

Buildxact Tax Context API

Tax rates and inclusivity rules applied to estimate totals.

Open Collections 6

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

API Collection

OPEN COLLECTION

Buildxact Public Authentication API

OPEN COLLECTION

Buildxact Public Authentication Estimate Items API

OPEN COLLECTION

Buildxact Public Authentication Estimates API

OPEN COLLECTION

Buildxact Public API

OPEN COLLECTION

Buildxact Public Authentication Tax Context API

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Buildxact Plans Pricing

4 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Buildxact Rate Limits

1 limits

RATE LIMITS

FinOps 1

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

Buildxact Finops

FINOPS

Event Specifications 1

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

Buildxact Webhooks

Buildxact webhook delivery channel. Subscribers register a target URL inside the Buildxact web app ("My Business > API"), pick the events they want, and verify each payload with...

ASYNCAPI

Semantic Vocabularies 1

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

Buildxact Context

0 classes · 5 properties

JSON-LD

Spectral Rules 3

Spectral governance rulesets for linting and validating these APIs.

Buildxact API Rules

6 rules · 1 errors 5 warnings

SPECTRAL

Buildxact API Rules

5 rules · 3 warnings 2 info

SPECTRAL

Buildxact API Rules

7 rules · 1 errors 4 warnings 2 info

SPECTRAL

JSON Schema 2

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

Buildxact Estimate Item

12 properties

JSON SCHEMA

Buildxact Estimate

14 properties

JSON SCHEMA

Examples 2

Example request and response payloads for these APIs.

Buildxact Estimate Accepted Event Example

3 fields

EXAMPLE

Buildxact List Estimates Example

3 fields

EXAMPLE

Security Posture 3

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

Buildxact Authentication

apiKey/http · 2 schemes

SECURITY

Buildxact Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Buildxact Vulnerability Disclosure

disclosure policy published

SECURITY

Agentic Access 1

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

Buildxact Agentic Access

13 operations · 8 acting

AGENTIC

Resources

Get Started 2

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

Trial

Trial

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Build 2

SDKs, sample code, and the tooling you integrate with

AccountingIntegrations

AccountingIntegrations

GitHub

GitHub

Access & Security 3

Authentication, authorization, and security posture

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 3

Status, limits, changes, and where to get help

HelpCenter

HelpCenter

APIHelpArticle

APIHelpArticle

Contact

Contact

Commercial 4

Pricing, plans, and the legal terms of use

Pricing

Plans

TermsOfService

PrivacyPolicy

Company 3

The organization behind the API

Website

Website

Blog

Blog

LinkedIn

Other 6

Properties that don't map to a standard resource type

CapabilityMap

AustraliaSite

USSite

UKSite

BluAI

Company

Source (apis.yml)

aid: buildxact
name: Buildxact
description: Buildxact is a Melbourne, Australia-headquartered construction estimating and project management SaaS for residential
  builders, remodelers, trade contractors, and building-material suppliers. Founded in 2011, the company operates regional
  offices in Austin, Texas (North America), and serves customers across Australia, New Zealand, the United Kingdom, the United
  States, and Canada. The platform spans the full residential job lifecycle — lead capture, digital takeoffs, AI-assisted
  estimating ("Blu"), customer quoting and e-signatures, supplier/dealer price-list integration, purchase orders, scheduling
  (Gantt), timesheets, variations/change orders, invoicing, and two-way accounting sync with Xero and QuickBooks Online. Buildxact
  exposes a public REST API and webhook surface at developer.buildxact.com, available to Merchant and Manufacturer partners
  as well as customer subscribers, using a Microsoft Azure API Management gateway (Ocp-Apim-Subscription-Key + bearer token).
  Endpoints support OData filtering and sorting, with a separate UAT/staging environment. In 2024, Autodesk announced an agreement
  to acquire Buildxact, positioning the product as a residential construction front-end alongside Autodesk's broader AEC portfolio.
type: Provider
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: true
  try_now: true
  public: false
  label: Freemium (free trial) · Self-serve signup
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-09-03'
  method: derived
position: Producing
access: 3rd-Party
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/buildxact.png
tags:
- Construction
- Residential Construction
- Construction Management
- Estimating
- Takeoffs
- Job Management
- Project Management
- Quoting
- Scheduling
- Purchase Orders
- Invoicing
- Supplier Integration
- Material Pricing
- Builders
- Remodelers
- Trades
- Software-as-a-Service
- Australia
- Autodesk
tags_raw:
- Construction
- Residential Construction
- Construction Management
- Estimating
- Takeoffs
- Job Management
- Project Management
- Quoting
- Scheduling
- Purchase Orders
- Invoicing
- Supplier Integration
- Material Pricing
- Builders
- Remodelers
- Trades
- SaaS
- Australia
- Autodesk
url: https://raw.githubusercontent.com/api-evangelist/buildxact/refs/heads/main/apis.yml
created: '2026-05-25'
modified: '2026-05-25'
specificationVersion: '0.23'
apis:
- aid: buildxact:buildxact-webhooks
  name: Buildxact Webhooks
  description: 'Buildxact''s webhook surface lets partner and customer integrations receive real-time notifications when events
    occur inside the construction-management platform — including Estimate Accepted, Lead Created, and Lead Updated, plus
    additional event types reserved for Merchant and Manufacturer plan tiers. Webhooks are registered from the "My Business
    > API" panel of the Buildxact web app: provide a destination URL, choose events, store the signing secret used to verify
    payload authenticity, and inspect deliveries via the built-in Event Log. Payloads are JSON over HTTPS.'
  humanURL: https://developer.buildxact.com/webhooks
  version: v1
  tags:
  - Webhook
  - Event
  - Estimates
  - Leads
  - Event-Driven
  tags_raw:
  - Webhooks
  - Events
  - Estimates
  - Leads
  - Event-Driven
  properties:
  - type: Documentation
    url: https://developer.buildxact.com/webhooks
  - type: AsyncAPI
    url: asyncapi/buildxact-webhooks-asyncapi.yml
- aid: buildxact:buildxact-authentication-api
  name: Buildxact Authentication API
  description: First-party login and bearer token refresh.
  humanURL: https://developer.buildxact.com/apis
  baseURL: https://api.buildxact.com
  tags:
  - Authentication
  properties:
  - type: OpenAPI
    url: openapi/buildxact-authentication-api-openapi.yml
  - type: Documentation
    url: https://developer.buildxact.com/getting-started
  - type: Documentation
    url: https://developer.buildxact.com/apis
  - type: Documentation
    url: https://developer.buildxact.com/estimate-data
  - type: Authentication
    url: https://developer.buildxact.com/authorization
  - type: Signup
    url: https://developer.buildxact.com/signup
  - type: Plans
    url: https://developer.buildxact.com/plans
  - type: HelpCenter
    url: https://help.buildxact.com/en/articles/4510284-buildxact-application-programming-interface-api
  - type: JSONSchema
    url: json-schema/buildxact-estimate-schema.json
  - type: JSONSchema
    url: json-schema/buildxact-estimate-item-schema.json
  - type: JSONLD
    url: json-ld/buildxact-context.jsonld
  - type: Vocabulary
    url: vocabulary/buildxact-vocabulary.yml
  - type: RateLimits
    url: rate-limits/buildxact-rate-limits.yml
- aid: buildxact:buildxact-estimate-items-api
  name: Buildxact Estimate Items API
  description: Line items inside an estimate (materials, labor, assemblies).
  humanURL: https://developer.buildxact.com/apis
  baseURL: https://api.buildxact.com
  tags:
  - Estimate Items
  properties:
  - type: OpenAPI
    url: openapi/buildxact-estimate-items-api-openapi.yml
  - type: Documentation
    url: https://developer.buildxact.com/getting-started
  - type: Documentation
    url: https://developer.buildxact.com/apis
  - type: Documentation
    url: https://developer.buildxact.com/estimate-data
  - type: Authentication
    url: https://developer.buildxact.com/authorization
  - type: Signup
    url: https://developer.buildxact.com/signup
  - type: Plans
    url: https://developer.buildxact.com/plans
  - type: HelpCenter
    url: https://help.buildxact.com/en/articles/4510284-buildxact-application-programming-interface-api
  - type: JSONSchema
    url: json-schema/buildxact-estimate-schema.json
  - type: JSONSchema
    url: json-schema/buildxact-estimate-item-schema.json
  - type: JSONLD
    url: json-ld/buildxact-context.jsonld
  - type: Vocabulary
    url: vocabulary/buildxact-vocabulary.yml
  - type: RateLimits
    url: rate-limits/buildxact-rate-limits.yml
- aid: buildxact:buildxact-estimates-api
  name: Buildxact Estimates API
  description: Construction estimates — the top-level pricing document for a job.
  humanURL: https://developer.buildxact.com/apis
  baseURL: https://api.buildxact.com
  tags:
  - Estimates
  properties:
  - type: OpenAPI
    url: openapi/buildxact-estimates-api-openapi.yml
  - type: Documentation
    url: https://developer.buildxact.com/getting-started
  - type: Documentation
    url: https://developer.buildxact.com/apis
  - type: Documentation
    url: https://developer.buildxact.com/estimate-data
  - type: Authentication
    url: https://developer.buildxact.com/authorization
  - type: Signup
    url: https://developer.buildxact.com/signup
  - type: Plans
    url: https://developer.buildxact.com/plans
  - type: HelpCenter
    url: https://help.buildxact.com/en/articles/4510284-buildxact-application-programming-interface-api
  - type: JSONSchema
    url: json-schema/buildxact-estimate-schema.json
  - type: JSONSchema
    url: json-schema/buildxact-estimate-item-schema.json
  - type: JSONLD
    url: json-ld/buildxact-context.jsonld
  - type: Vocabulary
    url: vocabulary/buildxact-vocabulary.yml
  - type: RateLimits
    url: rate-limits/buildxact-rate-limits.yml
- aid: buildxact:buildxact-tax-context-api
  name: Buildxact Tax Context API
  description: Tax rates and inclusivity rules applied to estimate totals.
  humanURL: https://developer.buildxact.com/apis
  baseURL: https://api.buildxact.com
  tags:
  - Tax Context
  properties:
  - type: OpenAPI
    url: openapi/buildxact-tax-context-api-openapi.yml
  - type: Documentation
    url: https://developer.buildxact.com/getting-started
  - type: Documentation
    url: https://developer.buildxact.com/apis
  - type: Documentation
    url: https://developer.buildxact.com/estimate-data
  - type: Authentication
    url: https://developer.buildxact.com/authorization
  - type: Signup
    url: https://developer.buildxact.com/signup
  - type: Plans
    url: https://developer.buildxact.com/plans
  - type: HelpCenter
    url: https://help.buildxact.com/en/articles/4510284-buildxact-application-programming-interface-api
  - type: JSONSchema
    url: json-schema/buildxact-estimate-schema.json
  - type: JSONSchema
    url: json-schema/buildxact-estimate-item-schema.json
  - type: JSONLD
    url: json-ld/buildxact-context.jsonld
  - type: Vocabulary
    url: vocabulary/buildxact-vocabulary.yml
  - type: RateLimits
    url: rate-limits/buildxact-rate-limits.yml
common:
- type: CapabilityMap
  url: capabilities/buildxact-capability-edges.yml
  name: Buildxact Business Capability Map
- type: AgenticAccess
  url: agentic-access/buildxact-agentic-access.yml
- type: VulnerabilityDisclosure
  url: security/buildxact-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/buildxact-domain-security.yml
- type: Authentication
  url: authentication/buildxact-authentication.yml
- type: Website
  url: https://www.buildxact.com
- type: AustraliaSite
  url: https://www.buildxact.com/au/
- type: USSite
  url: https://www.buildxact.com/us/
- type: UKSite
  url: https://www.buildxact.com/uk/
- type: DeveloperPortal
  url: https://developer.buildxact.com
- type: HelpCenter
  url: https://help.buildxact.com
- type: APIHelpArticle
  url: https://help.buildxact.com/en/articles/4510284-buildxact-application-programming-interface-api
- type: Pricing
  url: https://www.buildxact.com/us/pricing/
- type: Plans
  url: https://help.buildxact.com/en/articles/11559145-which-buildxact-subscription-plan-is-right-for-my-business
- type: Integrations
  url: https://www.buildxact.com/au/features/integrations/
- type: AccountingIntegrations
  url: https://www.buildxact.com/us/features/construction-accounting-software/
- type: BluAI
  url: https://www.buildxact.com/us/features/blu/
- type: Company
  url: https://www.buildxact.com/au/company/
- type: Blog
  url: https://www.buildxact.com/us/blog/
- type: Contact
  url: https://www.buildxact.com/us/contact/
- type: Trial
  url: https://www.buildxact.com/us/free-trial/
- type: LinkedIn
  url: https://au.linkedin.com/company/buildxact
- type: GitHub
  url: https://github.com/Buildxact
- type: TermsOfService
  url: https://www.buildxact.com/au/terms-of-use/
- type: PrivacyPolicy
  url: https://www.buildxact.com/au/privacy-policy/
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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