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 API contracts indexed 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 24 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

52.0/100 developing ▬ flat Agent 22/100 agent aware Front door AI 3/6 light Heartbeat 100/100 alive saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessFreemiumSelf serve⚡ Free to try

1 published contract

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

What this lets a business do 1

Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →

Capital Programme & Project Controls Management

BC-5020

Estimate ItemsEstimates

POST /estimates GET /estimates/{estimateId}/items

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 52.0/100 · developing

Contract Quality 12.5 / 19

Developer Ergonomics 5.9 / 15

Access Clarity 11.1 / 15

Operational Transparency 2.1 / 10

Contract Governance 2.5 / 9

Discoverability 4.3 / 8

Regulatory Posture 4.0 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 22/100 · 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

Pagination 5 / 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 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.

The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% 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):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
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)
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document

8 more unmet checks in the Agent Readiness table above.

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

Developer Ergonomics scores 39.3 — up to +12.1 composite points
Operational Transparency scores 21.1 — up to +10.3 composite points
Contract Governance scores 27.3 — up to +8.7 composite points

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.

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/buildxact/apis.yml: open an issue on github.com/api-evangelist/buildxact 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 →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Procurement and B2B Buying (source-to-pay suites, spend management)	undeclared	-	-	-

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

Standards implemented 2

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.

OpenAPI

measured — observed by APIs.io (published)

AsyncAPI

measured — observed by APIs.io (published)

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 5

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

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

Buildxact API pricing

Prices published by Buildxact, read 2026-10-28 from www.buildxact.com/us/pricing/.

Plan	Price
Go	$0/ Start for Free Includes: 5 complimentary credits included with Go
Foundation	$199/mo Includes: Unlimited Users, Lead Management, Digital Takeoffs, Blu: Assembly Assistant, Customizable Quote Lett
Foundation (annual)	$169/mo Includes: Save $358
Pro	$399/mo Includes: Everything in Foundation, plus: Blu: Estimate Generator, Job Management, Schedules, Buildxact Onsite
Pro (annual)	$339/mo Includes: Save $718
Master	$599/mo Includes: Everything in Pro, plus: Blu: Takeoff Assistant, Blu: Estimate Reviewer, User Access Controls, Prior
Master (annual)	$509/mo Includes: Save $1078

Plan details, limits and sources →

Billed by: plan (monthly billing) · FinOps profile →

Pricing Plans 2

Published pricing tiers and plan structures.

Buildxact Plans Pricing

7 plans

PLANS

Buildxact Price Estimates

0 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Buildxact Rate Limits

1 limits

RATE LIMITS

Service Levels 1

Uptime the provider promises or reports, as SLA4OAI. Read from its own pages; APIs.io runs no monitors.

Buildxact

SLA

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 — asyncapi rules

6 rules · 1 errors 5 warnings

SPECTRAL

Buildxact — jsonschema 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

no policy recorded

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 3

SDKs, sample code, and the tooling you integrate with

PostmanWorkspace

PostmanWorkspace

AccountingIntegrations

AccountingIntegrations

GitHub

GitHub

Access & Security 3

Authentication, authorization, and security posture

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 4

Status, limits, changes, and where to get help

RateLimits

HelpCenter

APIHelpArticle

Contact

Commercial 6

Pricing, plans, and the legal terms of use

Plans

FinOps

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: false
  try_now: true
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Freemium · Self-serve signup
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-11-06'
  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
- Trade
- 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: Plans
  url: plans/buildxact-plans-pricing.yml
- type: PostmanWorkspace
  url: https://www.postman.com/kinlaneapi/buildxact/overview
- type: RateLimits
  url: rate-limits/buildxact-rate-limits.yml
- type: FinOps
  url: finops/buildxact-finops.yml
- 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

Buildxact API — frequently asked questions

Does Buildxact have an API?

Yes. APIs.io lists 5 APIs from Buildxact, including Buildxact Webhooks, Buildxact Authentication API and Buildxact Estimate Items API, and 2 more.

Is there an OpenAPI specification for the Buildxact API?

Yes. APIs.io indexes 4 OpenAPI specifications for Buildxact, each linked for download from this page.

How do I authenticate with the Buildxact API?

Buildxact uses bearer-token authentication (apiKey/http · 2 schemes). The details are profiled on APIs.io as Buildxact Authentication.

How much does the Buildxact API cost?

Buildxact publishes its prices; its Go plan is $0/ Start for Free as of 2026-10-28. APIs.io lists 7 pricing plans for Buildxact, with each plan's price, limits and inclusions under Pricing on this page.

Is the Buildxact API ready for AI agents?

Buildxact has a Kin Score of 52.0 out of 100 (developing) and an Agent Readiness score of 21.7 (agent-aware), scored by API Evangelist on 2026-11-06.

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