Buildxact
Buildxact Public API

Buildxact's public REST API exposes core construction-job data including estimates and estimate items, with related tax-context and reference data. The API is fronted by Azure API Management; every request must carry an Ocp-Apim-Subscription-Key header identifying the partner organization and an Authorization: Bearer access token scoped to a Buildxact user and tenant. Endpoints follow REST conventions with OData query support — $filter, $orderBy, $top, $skip, and $count=true (record total returned via the x-odata-total-count response header). A staging environment is available at developer-uat.buildxact.com. Rate-limited at 100 requests per 30-second window.
Buildxact Public API is one of 2 APIs that Buildxact publishes on the APIs.io network, described by a machine-readable OpenAPI specification.
This API exposes 1 machine-runnable capability that can be deployed as REST, MCP, or Agent Skill surfaces via Naftiko and 2 JSON Schema definitions.
Tagged areas include Construction, Estimates, Estimate Items, REST, and OData. The published artifact set on APIs.io includes API documentation, authentication docs, an OpenAPI specification, a JSON-LD context, rate-limit docs, 1 Naftiko capability spec, and 2 JSON Schemas.
Documentation GitHub OpenAPI
OpenAPI Specification

openapi: 3.0.3
info:
  title: Buildxact Public API
  version: v3
  description: >-
    Buildxact's public REST API for residential construction estimating and
    job management. The API is fronted by Azure API Management and requires
    both an Ocp-Apim-Subscription-Key (identifying the partner / customer
    organization) and an Authorization: Bearer access token (identifying the
    specific user and tenant). Endpoints follow REST conventions with OData
    query support: $filter (operators include eq, gt, lt, contains, in),
    $orderBy with asc/desc, $top, $skip, and $count=true (record total
    returned in the x-odata-total-count response header). A short-lived
    access token is obtained via the accounts/auth/login endpoint and may be
    refreshed via accounts/auth/refresh-token. Rate-limited at 100 requests
    per 30-second window. A separate UAT/staging environment is available
    at developer-uat.buildxact.com for integration testing.
  contact:
    name: Buildxact API Support
    url: https://developer.buildxact.com/getting-started
  termsOfService: https://www.buildxact.com/au/terms-of-use/
  license:
    name: Buildxact API Terms
    url: https://www.buildxact.com/au/terms-of-use/
servers:
  - url: https://api.buildxact.com
    description: Production
  - url: https://api-v3.buildxact.com
    description: Production (v3 host used for the accounts/auth endpoints)
  - url: https://developer-uat.buildxact.com
    description: UAT / Staging
tags:
  - name: Authentication
    description: First-party login and bearer token refresh.
  - name: Estimates
    description: Construction estimates — the top-level pricing document for a job.
  - name: Estimate Items
    description: Line items inside an estimate (materials, labor, assemblies).
  - name: Tax Context
    description: Tax rates and inclusivity rules applied to estimate totals.
security:
  - SubscriptionKey: []
    BearerAuth: []
paths:
  /accounts/auth/login:
    post:
      tags:
        - Authentication
      summary: Login and Obtain Bearer Token
      description: >-
        Exchange a Buildxact user email and plaintext API key for a
        short-lived bearer token plus refresh token. The subscription key
        header is still required to route the request through API
        Management.
      operationId: login
      security:
        - SubscriptionKey: []
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/LoginRequest'
      responses:
        '200':
          description: Authentication succeeded.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/TokenResponse'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '429':
          $ref: '#/components/responses/TooManyRequests'
  /accounts/auth/refresh-token:
    post:
      tags:
        - Authentication
      summary: Refresh Bearer Token
      description: >-
        Exchange a refresh token for a new short-lived access token without
        re-prompting the user for credentials.
      operationId: refreshToken
      security:
        - SubscriptionKey: []
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/RefreshTokenRequest'
      responses:
        '200':
          description: New access token issued.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/TokenResponse'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /estimates:
    get:
      tags:
        - Estimates
      summary: List Estimates
      description: >-
        Return a paginated list of estimates for the authenticated tenant.
        Supports OData $filter, $orderBy, $top, $skip, and $count.
      operationId: listEstimates
      parameters:
        - $ref: '#/components/parameters/ODataFilter'
        - $ref: '#/components/parameters/ODataOrderBy'
        - $ref: '#/components/parameters/ODataTop'
        - $ref: '#/components/parameters/ODataSkip'
        - $ref: '#/components/parameters/ODataCount'
      responses:
        '200':
          description: Estimate collection.
          headers:
            x-odata-total-count:
              description: Total estimate count when $count=true is supplied.
              schema:
                type: integer
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/Estimate'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '429':
          $ref: '#/components/responses/TooManyRequests'
    post:
      tags:
        - Estimates
      summary: Create Estimate
      description: Create a new construction estimate for the authenticated tenant.
      operationId: createEstimate
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/Estimate'
      responses:
        '201':
          description: Estimate created.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Estimate'
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /estimates/{estimateId}:
    parameters:
      - $ref: '#/components/parameters/EstimateId'
    get:
      tags:
        - Estimates
      summary: Get Estimate
      description: Return a single estimate by its identifier, including totals and tax context.
      operationId: getEstimate
      responses:
        '200':
          description: Estimate found.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Estimate'
        '404':
          $ref: '#/components/responses/NotFound'
    patch:
      tags:
        - Estimates
      summary: Update Estimate
      description: Partially update fields on an existing estimate.
      operationId: updateEstimate
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/Estimate'
      responses:
        '200':
          description: Estimate updated.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Estimate'
        '400':
          $ref: '#/components/responses/BadRequest'
        '404':
          $ref: '#/components/responses/NotFound'
    delete:
      tags:
        - Estimates
      summary: Delete Estimate
      description: Delete an estimate by identifier.
      operationId: deleteEstimate
      responses:
        '204':
          description: Estimate deleted.
        '404':
          $ref: '#/components/responses/NotFound'
  /estimates/{estimateId}/items:
    parameters:
      - $ref: '#/components/parameters/EstimateId'
    get:
      tags:
        - Estimate Items
      summary: List Estimate Items
      description: >-
        Return the line items belonging to an estimate. Supports OData
        $filter, $orderBy, $top, $skip, and $count.
      operationId: listEstimateItems
      parameters:
        - $ref: '#/components/parameters/ODataFilter'
        - $ref: '#/components/parameters/ODataOrderBy'
        - $ref: '#/components/parameters/ODataTop'
        - $ref: '#/components/parameters/ODataSkip'
        - $ref: '#/components/parameters/ODataCount'
      responses:
        '200':
          description: Estimate item collection.
          headers:
            x-odata-total-count:
              description: Total item count when $count=true is supplied.
              schema:
                type: integer
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/EstimateItem'
    post:
      tags:
        - Estimate Items
      summary: Add Estimate Item
      description: Add a new line item to an estimate.
      operationId: addEstimateItem
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/EstimateItem'
      responses:
        '201':
          description: Estimate item created.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/EstimateItem'
  /estimates/{estimateId}/items/{itemId}:
    parameters:
      - $ref: '#/components/parameters/EstimateId'
      - $ref: '#/components/parameters/ItemId'
    get:
      tags:
        - Estimate Items
      summary: Get Estimate Item
      description: Return a single estimate line item.
      operationId: getEstimateItem
      responses:
        '200':
          description: Estimate item found.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/EstimateItem'
        '404':
          $ref: '#/components/responses/NotFound'
    patch:
      tags:
        - Estimate Items
      summary: Update Estimate Item
      description: Partially update an estimate line item.
      operationId: updateEstimateItem
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/EstimateItem'
      responses:
        '200':
          description: Estimate item updated.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/EstimateItem'
    delete:
      tags:
        - Estimate Items
      summary: Delete Estimate Item
      description: Remove an estimate line item.
      operationId: deleteEstimateItem
      responses:
        '204':
          description: Estimate item deleted.
  /tax-rates:
    get:
      tags:
        - Tax Context
      summary: List Tax Rates
      description: >-
        Return the tax rates available to the authenticated tenant, used to
        interpret tax-inclusive and tax-exclusive totals on estimates and
        estimate items.
      operationId: listTaxRates
      responses:
        '200':
          description: Tax rate collection.
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/TaxRate'
components:
  securitySchemes:
    SubscriptionKey:
      type: apiKey
      in: header
      name: Ocp-Apim-Subscription-Key
      description: Azure API Management subscription key issued to a partner organization.
    BearerAuth:
      type: http
      scheme: bearer
      bearerFormat: JWT
      description: Short-lived bearer token obtained from /accounts/auth/login.
  parameters:
    EstimateId:
      name: estimateId
      in: path
      required: true
      schema:
        type: string
      description: Unique identifier of the estimate.
    ItemId:
      name: itemId
      in: path
      required: true
      schema:
        type: string
      description: Unique identifier of the estimate line item.
    ODataFilter:
      name: $filter
      in: query
      description: OData filter expression (operators include eq, gt, lt, contains, in).
      schema:
        type: string
    ODataOrderBy:
      name: $orderBy
      in: query
      description: OData orderBy expression (e.g. fieldName asc, fieldName desc).
      schema:
        type: string
    ODataTop:
      name: $top
      in: query
      description: Page size — maximum records to return.
      schema:
        type: integer
        minimum: 1
    ODataSkip:
      name: $skip
      in: query
      description: Number of records to skip for pagination.
      schema:
        type: integer
        minimum: 0
    ODataCount:
      name: $count
      in: query
      description: When true, include the total record count in the x-odata-total-count response header.
      schema:
        type: boolean
  responses:
    BadRequest:
      description: Malformed request.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    Unauthorized:
      description: Missing or invalid credentials.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    NotFound:
      description: Resource not found.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    TooManyRequests:
      description: Rate limit exceeded (100 requests per 30-second window).
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
  schemas:
    LoginRequest:
      type: object
      required:
        - email
        - apiKey
      properties:
        email:
          type: string
          format: email
          description: Buildxact user email address.
        apiKey:
          type: string
          description: Plaintext API key issued to the Buildxact user.
    RefreshTokenRequest:
      type: object
      required:
        - refreshToken
      properties:
        refreshToken:
          type: string
          description: Refresh token previously returned by /accounts/auth/login.
    TokenResponse:
      type: object
      properties:
        accessToken:
          type: string
          description: Short-lived bearer token to use in the Authorization header.
        refreshToken:
          type: string
          description: Token used to mint a new access token without re-authenticating.
        expiresIn:
          type: integer
          description: Lifetime of the access token, in seconds.
        tokenType:
          type: string
          example: Bearer
    Estimate:
      type: object
      description: >-
        A construction estimate — the priced document a builder issues to a
        client capturing scope, line items, markup, and tax.
      properties:
        id:
          type: string
          description: Estimate identifier.
        name:
          type: string
          description: Human-readable estimate name.
        jobId:
          type: string
          description: Identifier of the parent job, if any.
        customerId:
          type: string
          description: Identifier of the customer this estimate is for.
        status:
          type: string
          description: Estimate status (e.g. Draft, Sent, Accepted, Declined).
        currency:
          type: string
          description: ISO 4217 currency code applied to monetary fields.
        total:
          type: number
          format: double
          description: Subtotal of all items before markup and tax.
        markup:
          type: number
          format: double
          description: Markup amount applied on top of the subtotal.
        totalIncMarkup:
          type: number
          format: double
          description: Subtotal plus markup, exclusive of tax.
        taxIncMarkup:
          type: number
          format: double
          description: Tax amount calculated on the markup-inclusive total.
        totalIncMarkupTax:
          type: number
          format: double
          description: Grand total including markup and tax.
        taxContext:
          $ref: '#/components/schemas/TaxContext'
        createdAt:
          type: string
          format: date-time
        modifiedAt:
          type: string
          format: date-time
    EstimateItem:
      type: object
      description: A line item on an estimate — material, labor, subcontractor, or assembly.
      properties:
        id:
          type: string
        estimateId:
          type: string
        description:
          type: string
        category:
          type: string
          description: Cost category (e.g. Materials, Labor, Subcontractor).
        unit:
          type: string
          description: Unit of measure (e.g. each, hour, m2, lf).
        quantity:
          type: number
          format: double
        unitCost:
          type: number
          format: double
        total:
          type: number
          format: double
        markup:
          type: number
          format: double
        totalIncMarkup:
          type: number
          format: double
        totalIncTax:
          type: number
          format: double
        taxContext:
          $ref: '#/components/schemas/TaxContext'
    TaxRate:
      type: object
      properties:
        id:
          type: string
        name:
          type: string
        rate:
          type: number
          format: double
          description: Tax rate as a decimal (e.g. 0.10 for 10%).
        isDefault:
          type: boolean
    TaxContext:
      type: object
      description: >-
        Tax inclusivity context — describes whether stored monetary values
        on an estimate or item already include tax and which tax rate
        applies.
      properties:
        taxRateId:
          type: string
        taxRate:
          type: number
          format: double
        pricesIncludeTax:
          type: boolean
    Error:
      type: object
      properties:
        code:
          type: string
        message:
          type: string
        details:
          type: array
          items:
            type: object
Buildxact Public API

Documentation

Specifications

Schemas & Data

Other Resources

OpenAPI Specification
