Example question
Which jobs are over budget on labor this month?
Construction · MCP connector
Built for 200+ construction systems, including the older on-premise ones other tools skip. Self-serve and hands-off: cloud systems connect in minutes, on-premise in about an hour. No consultant, no waiting for a report.
A selection of the 200 systems Junction connects. See every system
Fast
Cloud systems and ad platforms connect in about five minutes. On-premise systems take about an hour.
Hands-off
No consultant, no implementation project, no report to wait for. We do not need to be in the room.
Self-serve
Create an account, connect, add Junction to your AI tool and ask. Want a hand? Book time with us.
What it is
Junction is an MCP (Model Context Protocol) server that lets Claude, ChatGPT, Gemini or Copilot answer questions from the systems a contractor, owner or developer runs: accounting and ERP, job cost, project management and scheduling, estimating, field and safety, property and capital programs, including older on-premise systems such as Sage 300 CRE and Vista. Add one address to your AI tool, sign in, and ask in plain English. Junction fetches the figures from your own systems with the source and the time each was read. It cannot change your data, and we never run the AI model, so there is no extra AI bill.
01 · Example
This is what your team sees in their AI tool once Junction is connected.
Which jobs are over budget on labor this month?
Three jobs are over their labor budget this month. Riverside Medical Office is furthest over, by 12%.
| Job | Labor budget | Labor cost to date | Over by |
|---|---|---|---|
| 1042 · Riverside Medical Office | $184,000 | $206,080 | 12.0% |
| 1037 · Northgate Parking Structure | $96,500 | $101,325 | 5.0% |
| 1051 · Elm Street Lofts | $142,000 | $144,840 | 2.0% |
“Which jobs are over budget on labor this month?”
See Junction answer a question like this, live, on your kind of systems.
Book a 20-minute walkthrough02 · How it works
Sign in to your accounting and project systems, or install the small outbound-only agent for older on-premise ones. Cloud systems take about five minutes and on-premise ones about an hour, with no consultant and no implementation project.
Add one connector address to Claude, ChatGPT, Gemini or Copilot and sign in. No new app to learn.
Get answers from your own systems, with the source and the time each figure was read.
03 · For every team
Each person sees only what administrators allow: chosen systems, kinds of data and jobs.
Controllers, CFOs, AP and AR teams
Typical systems: Vista · Spectrum · Sage 300 CRE · Foundation · QuickBooks Desktop · Deltek Vantagepoint
Project managers, project engineers, superintendents
Typical systems: Primavera P6 · Aconex · Autodesk Build · CMiC · Vista · Fieldwire
Executives, operations managers, estimators
Typical systems: Every connected system, in one conversation
Owners, owner's representatives, program managers
Typical systems: e-Builder · Primavera Unifier · Owner Insite
04 · Security
05 · Systems
Accounting and ERP, project management, estimating, field, property and CRM. Choose a system to see what you can ask, or tell us what you run.
Featured systems
Vista
Accounting / ERP
Spectrum
Accounting / ERP
Foundation
Accounting / ERP
Sage 300 CRE
Accounting / ERP
ComputerEase
Accounting / ERP
CMiC
Accounting / ERP
QuickBooks Desktop
Accounting / ERP
Autodesk Build
Project management
e-Builder (Trimble Unity Construct)
Owner / capital programs
Owner Insite
Owner / capital programs
More systems
All product names and logos are trademarks of their respective owners. We are not affiliated with or endorsed by any of them.
06 · Compare
The usual ways to get answers out of construction software, side by side.
| Feature | Junction | Spreadsheet exports | BI dashboards | Building your own MCP server |
|---|---|---|---|---|
| Ask questions in plain English | Yes: In Claude, ChatGPT, Gemini or Copilot | No: You build the formulas | Partly: Only the views someone built | Yes: Once you have built it |
| Current data | Yes: Read when you ask, with a 'data as of' time | No: As old as the last export | Yes: On the refresh schedule | Yes: If you build it to |
| Older on-premise systems (Sage 300 CRE, on-premise Vista) | Yes: Outbound-only agent, no open ports | Partly: Manual exports | Partly: Usually needs a data gateway | Partly: You build the plumbing |
| Cannot change your data | Yes: It only reads, with roles and permissions | Partly: Depends who exports what | Partly: Depends on the setup | Partly: If you build it in |
| Several systems in one answer | Yes: One connector, many systems | No: Copy and paste between files | Partly: After a data project | Partly: One server per system, or more work |
| Effort to start | Yes: Minutes to an hour, no consultant | Yes: None, but repeated every time | No: Weeks of modelling | No: Months of engineering, then upkeep |
07 · Who builds Junction
Junction is built by Kaprin, a team with more than a decade in construction technology, building integrations for Vista, Spectrum, Sage, Foundation and over 100 construction systems, including the older on-premise ones. We know where the data lives and what an IT team will ask before letting anything near it.
08 · Questions
An MCP server is a program that lets an AI assistant such as Claude, ChatGPT, Gemini or Copilot use an outside system through the Model Context Protocol (MCP), an open standard for connecting AI tools to data. The assistant asks the server for what it needs and the server answers from that system. Junction is an MCP server for construction software: it answers from your accounting and project systems.
Junction is a connector that lets your AI assistant answer questions from a contractor's accounting and project systems. You add one address to your AI tool, sign in, and ask in plain English, for example which jobs are over budget on labor this month. Junction fetches the figures from your own systems and returns them with the time they were read.
It is self-serve and hands-off. Cloud systems connect in about five minutes; on-premise systems take about an hour, because you install a small agent on your own server. There is no implementation project, no consultant and no custom report to wait for. If you want a hand, book time with us.
Claude, ChatGPT, Gemini and Microsoft Copilot, through their custom-connector feature (ChatGPT requires a plan with developer mode enabled by a workspace admin). Junction uses the Model Context Protocol, an open standard that lets AI assistants connect to outside tools and data.
No. Junction only reads. Nothing in the connector can create, edit or delete a record. We also ask you to use database logins and API keys that have read permission only, as a second layer of protection.
Yes, that is a main purpose of it. For systems that cannot be reached from the internet, you install a small Junction agent on your own server (about an hour, on your own) and it connects outward over HTTPS, so you open no inbound firewall ports.
Yes. Administrators set roles and permissions: which systems, which kinds of data and even which jobs each person can reach. Access can only be narrowed, never widened, and an audit log records who asked what and whether it worked, never the values.
We do not run any AI model. You use your own Claude, ChatGPT, Gemini or Copilot subscription, and any usage is billed by them. Junction only supplies the data when the assistant asks for it.
When you ask a question, Junction fetches just the rows needed from your system and returns them to your AI tool, passing through our servers in transit. Answers are not stored. We keep an audit log of who asked which tool and system and whether it succeeded, never the values asked for or returned.
Yes. Junction is an MCP server for construction systems including Viewpoint Vista, Trimble Spectrum, Sage 300 CRE, Foundation, CMiC, ComputerEase, QuickBooks Desktop, Autodesk Build and e-Builder. One Junction connection covers all of your systems, so a single question can draw on several of them. Built for 200+ construction systems: the full list is on the systems page.
Anyone who needs answers from the company's systems: finance and accounting (job cost, billing, payables), project management (budgets, commitments, change orders, issues), operations and leadership (performance across all jobs), and owners' capital-program teams. Administrators decide which systems, kinds of data and jobs each person can reach.
No. Accounting and job cost are where many teams start, but Junction is built to give AI assistants access to whichever system holds the answer: project management and scheduling (Primavera P6, Aconex, Autodesk Build), estimating, field and safety tools, general ERP, property management and CRM.
Junction is built for 200+ construction systems: Vista, Spectrum, Foundation, Sage 300 CRE, ComputerEase, CMiC, QuickBooks Desktop, Autodesk Build and e-Builder, and widely used systems such as Primavera P6, Aconex, Fieldwire, Deltek Vantagepoint, Simpro and JD Edwards. Across construction accounting and ERP, project management, estimating and field, general ERP, property and CRM. If yours is not on the list, tell us what you run.
Plans start at $149 a month, priced by the number of systems you connect and the people who use them. There is no AI charge and no per-question meter. See the pricing page for every plan.
New to MCP? Read what an MCP server is and why construction teams need one.
09 · Get started
Prefer a note? Tell us who you are and what you run, or ask for a system that is not listed. We reply within one business day.