Turn Trimble Unity Construct into an API

What you can build on e-Builder

• Get the processes in my court

  Build this

  Reads the Project Processes page with the In My Court filter: each process with its subject, current step, days on that step, due date and status.

  Takes

  Project, process type (optional)

  Returns

  Process name, subject, current step, days in current step, due date, status

• Get submittal items and their status

  Build this

  Reads the Submittal Register for one project: each item's number, revision, package, spec section, status and who holds it.

  Takes

  Project, status (optional)

  Returns

  Item number, rev number, package number, spec section, title, status, held by, submittal coordinator

• Get the routing history of a process

  Build this

  Opens one process, selects Show History and reads the Routing History: every step with its actor, due date, completion time, age in days and status.

  Takes

  Project, process name

  Returns

  Process name, process status, steps with step name, actor, due date, completed, age in days, status, comments

• Start an invoice process

  Build this

  Clicks Start Process, chooses your owner's invoice process, fills in start step fields such as commitment, invoice number, description and amount, then Submit or Save.

  Takes

  Project, process type, commitment, invoice number, description, invoice amount, submit or save

  Returns

  Process name, subject, current step, status

Automate e-Builder with a workflow

A workflow runs your methods as one process, with nobody at the screen. A schedule or a call from your own system starts it, the steps run in order, and the result arrives in your inbox or in the systems you already use.

• New processes in your court, every project

  Build this

  Starts

  Every weekday at 7:00

  Step 1

  For each project you name, get the processes in your court.

  Step 2

  Keep the processes that were not in your court on the last run.

  Step 3

  Email you the list by project, with process name, subject, current step and due date.

• Submittal items with a changed status

  Build this

  Starts

  Every weekday at 16:00

  Step 1

  For each project, get the items in the Submittal Register.

  Step 2

  Keep the items whose status or held by changed since the last run.

  Step 3

  Post each one, with spec section, title, status and held by, to your webhook.

• Where each invoice process stands

  Build this

  Starts

  When your system calls the workflow's webhook with a list of projects and process names

  Step 1

  For each project and process name, get the Routing History of the invoice process.

  Step 2

  Keep the current step, its actor, due date and age in days.

  Step 3

  Post the result to your accounting system's webhook.

You can run a workflow by hand on every plan, Free included. Schedules and webhook triggers come with the paid plans, from $29 a month.

Once built, one call from your code

Once you have built a method, it is one POST to /v1/runs from your backend, or a tool an AI agent calls over MCP. This is what “Get the processes in my court” would look like.

curl https://api.fous.com/v1/runs \
  -H "Authorization: Bearer $FOUS_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "method": "app.e-builder.net/get_processes_in_my_court",
    "input": {
      "project": "Acme Medical Center Expansion",
      "process_type": "Contractor Invoice"
    }
  }'

{
  "status": "completed",
  "data": {
    "project": "Acme Medical Center Expansion",
    "processes": [
      {
        "process_name": "Contractor Invoice 142",
        "subject": "Pay Application 7, Northwind Builders",
        "current_step": "Contractor Revision",
        "days_in_current_step": 2,
        "due_date": "2026-11-14",
        "status": "Open"
      }
    ],
    "count": 1
  }
}

An example with invented data, not a ready-made endpoint. The method exists in your organization once you build it, and its name, inputs and fields follow your request.

E-Builder’s own options

Trimble documents a REST API for Trimble Unity Construct with JSON payloads, used to connect ERP, CRM and asset management systems. It runs as a system user created for API access with full administrative permissions on the account, and the base subscription allows up to 15,000 calls a day. Without it, people work in e-Builder's pages and can export a process's Routing History to Excel.

Read on November 12, 2026: Trimble Unity Construct REST API, Processes guide.

Signing in to e-Builder

You set your password and security questions from the email you get when added to e-Builder, then sign in with your username and password. The sign-in page also offers to pair your account with a Trimble Identity (TID) and log in with its email and password. With Fous you sign in once through e-Builder's own sign-in: the login is sealed with AES-256, code and agents never see it, and expired sessions sign back in.

Worth knowing

Each account designs its own processes

The process type decides which steps and statuses you see, and submittal statuses are set by account administrators. A method takes the process type by the name your owner uses.

An invoice needs an approved commitment

A commitment invoice can only be added against a commitment that exists on the project and is approved. The invoice number must not already be in use for that project and vendor.

Only licensed subcontractors forward items

Licensed and non-licensed subcontractors can respond, comment and attach documents to submittal items. Only licensed subcontractors can send an item on to another subcontractor.

The API user is an administrator

Trimble expects the API user to be a system user with full administrative permissions. Daily limits reset at UTC midnight, and going over returns HTTP 426 until the reset.

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