STACK

STACK Construction Technologies makes cloud-based preconstruction software for on-screen takeoff and estimating used by contractors across most trades. STACK does expose a real, documented REST API (v2), but access is gated - you must be a STACK customer on an API-Enabled Subscription (or an approved partner) to obtain credentials. Authentication is OAuth 2.0, offered as two-legged (client-credentials, server-to-server) and three-legged (authorization-code, on behalf of a user) flows. Tokens are issued by a per-tenant authorization server (base pattern https://{server}/api/v2). The full endpoint reference sits behind an access request; the API surface catalogued here is modeled from STACK's public developer overview, authentication guide, and tutorials - it is not sourced from an official machine-readable OpenAPI document.

6 APIs 0 Features
ConstructionPreconstructionTakeoffEstimatingConstruction TechnologyPartner API

APIs

STACK Projects API

Create and update projects and organize their contents in folders - the top-level container that takeoffs, plans, and estimates hang off of. Modeled from STACK's developer tutor...

STACK Plans & Files API

Upload plan sets and supporting documents into project folders, read file metadata, update file properties, and download plans. Modeled from STACK's developer tutorials (Folders...

STACK Takeoffs API

Create takeoffs on a project, list a takeoff's pages, set page scale, and retrieve measured quantities. On-screen takeoff is STACK's core workflow. Modeled from STACK's develope...

STACK Estimates API

Create, update, and retrieve estimate proposals - turning takeoff quantities into priced line items and a bid. Modeled from STACK's developer tutorials (EstimateProposals endpoi...

STACK Items & Assemblies API

Manage items and assemblies attached to takeoffs and retrieve their quantities and costs, so partner tools can pull takeoff/estimating data into invoices, purchase orders, or a ...

STACK Reference Data API

Read-only lookup endpoints for cost types, states, and countries used when constructing projects and estimates. Modeled from STACK's developer tutorials (CostTypes, States, Coun...

Pricing Plans

Stack Takeoff Plans Pricing

4 plans

PLANS

Rate Limits

Stack Takeoff Rate Limits

4 limits

RATE LIMITS

FinOps

Stack Takeoff Finops

FINOPS

Resources

🔗
DomainSecurity
DomainSecurity
🔗
LinkedIn
LinkedIn
🔗
Website
Website
🔗
Documentation
Documentation
🔑
Authentication
Authentication
📝
SignUp
SignUp
🔗
Plans
Plans
🔗
RateLimits
RateLimits
🔗
FinOps
FinOps
📰
Blog
Blog

Sources

Raw ↑ 
aid: stack-takeoff
url: https://raw.githubusercontent.com/api-evangelist/stack-takeoff/refs/heads/main/apis.yml
name: STACK
kind: company
description: STACK Construction Technologies makes cloud-based preconstruction software for on-screen takeoff and estimating
  used by contractors across most trades. STACK does expose a real, documented REST API (v2), but access is gated - you must
  be a STACK customer on an API-Enabled Subscription (or an approved partner) to obtain credentials. Authentication is OAuth
  2.0, offered as two-legged (client-credentials, server-to-server) and three-legged (authorization-code, on behalf of a user)
  flows. Tokens are issued by a per-tenant authorization server (base pattern https://{server}/api/v2). The full endpoint
  reference sits behind an access request; the API surface catalogued here is modeled from STACK's public developer overview,
  authentication guide, and tutorials - it is not sourced from an official machine-readable OpenAPI document.
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
tags:
- Construction
- Preconstruction
- Takeoff
- Estimating
- Construction Technology
- Partner API
created: '2026-07-04'
modified: '2026-07-04'
specificationVersion: '0.19'
apis:
- aid: stack-takeoff:stack-takeoff-projects-api
  name: STACK Projects API
  tags:
  - Projects
  - Folders
  - Preconstruction
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://www.stackct.com/developers-docs/
  baseURL: https://{server}/api/v2
  properties:
  - url: https://www.stackct.com/developers-docs/
    type: Documentation
  - url: https://www.stackct.com/developers-reference/
    type: APIReference
  - url: openapi/stack-takeoff-openapi.yml
    type: OpenAPI
  description: Create and update projects and organize their contents in folders - the top-level container that takeoffs,
    plans, and estimates hang off of. Modeled from STACK's developer tutorials (POST/PUT /Projects, project Folders CRUD).
- aid: stack-takeoff:stack-takeoff-plans-files-api
  name: STACK Plans & Files API
  tags:
  - Plans
  - Files
  - Documents
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://www.stackct.com/developers-docs/
  baseURL: https://{server}/api/v2
  properties:
  - url: https://www.stackct.com/developers-docs/
    type: Documentation
  - url: https://www.stackct.com/developers-docs-tutorials/
    type: Documentation
  - url: openapi/stack-takeoff-openapi.yml
    type: OpenAPI
  description: Upload plan sets and supporting documents into project folders, read file metadata, update file properties,
    and download plans. Modeled from STACK's developer tutorials (Folders/Files endpoints).
- aid: stack-takeoff:stack-takeoff-takeoffs-api
  name: STACK Takeoffs API
  tags:
  - Takeoff
  - Pages
  - Quantities
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://www.stackct.com/developers-docs/
  baseURL: https://{server}/api/v2
  properties:
  - url: https://www.stackct.com/developers-docs/
    type: Documentation
  - url: https://www.stackct.com/developers-docs-tutorials/
    type: Documentation
  - url: openapi/stack-takeoff-openapi.yml
    type: OpenAPI
  description: Create takeoffs on a project, list a takeoff's pages, set page scale, and retrieve measured quantities. On-screen
    takeoff is STACK's core workflow. Modeled from STACK's developer tutorials (CreateTakeoff, Takeoffs Pages, Scale).
- aid: stack-takeoff:stack-takeoff-estimates-api
  name: STACK Estimates API
  tags:
  - Estimating
  - Proposals
  - Costs
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://www.stackct.com/developers-docs/
  baseURL: https://{server}/api/v2
  properties:
  - url: https://www.stackct.com/developers-docs/
    type: Documentation
  - url: https://www.stackct.com/developers-docs-tutorials/
    type: Documentation
  - url: openapi/stack-takeoff-openapi.yml
    type: OpenAPI
  description: Create, update, and retrieve estimate proposals - turning takeoff quantities into priced line items and a bid.
    Modeled from STACK's developer tutorials (EstimateProposals endpoints).
- aid: stack-takeoff:stack-takeoff-items-assemblies-api
  name: STACK Items & Assemblies API
  tags:
  - Items
  - Assemblies
  - Cost Data
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://www.stackct.com/developers-docs/
  baseURL: https://{server}/api/v2
  properties:
  - url: https://www.stackct.com/developers-docs/
    type: Documentation
  - url: openapi/stack-takeoff-openapi.yml
    type: OpenAPI
  description: Manage items and assemblies attached to takeoffs and retrieve their quantities and costs, so partner tools
    can pull takeoff/estimating data into invoices, purchase orders, or a separate estimating system. Modeled from STACK's
    developer overview description of core capabilities.
- aid: stack-takeoff:stack-takeoff-reference-data-api
  name: STACK Reference Data API
  tags:
  - Reference Data
  - Cost Types
  - Lookups
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://www.stackct.com/developers-docs/
  baseURL: https://{server}/api/v2
  properties:
  - url: https://www.stackct.com/developers-docs-tutorials/
    type: Documentation
  - url: openapi/stack-takeoff-openapi.yml
    type: OpenAPI
  description: Read-only lookup endpoints for cost types, states, and countries used when constructing projects and estimates.
    Modeled from STACK's developer tutorials (CostTypes, States, Countries).
common:
- type: DomainSecurity
  url: security/stack-takeoff-domain-security.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/stack-construction-technologies
- type: Website
  url: https://www.stackct.com/
- type: Documentation
  url: https://www.stackct.com/developers-docs/
- type: Authentication
  url: https://www.stackct.com/developers-docs-authentication/
- type: SignUp
  url: https://www.stackct.com/developers/
- type: Plans
  url: plans/stack-takeoff-plans-pricing.yml
- type: RateLimits
  url: rate-limits/stack-takeoff-rate-limits.yml
- type: FinOps
  url: finops/stack-takeoff-finops.yml
- url: https://www.stackct.com/blog/
  type: Blog
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com