Is there an MCP server for Sage 100 Contractor?

Not yet. Junction is a read-only MCP server for construction software, and Sage 100 Contractor is in its next wave of systems. It is not available today; tell us you run Sage 100 Contractor and it moves up the list.

Is Sage 100 Contractor supported today?

No. Sage 100 Contractor is in our next wave, which means it is next in line to be built, not that it works today. Tell us you run it and it moves up the list.

Can the AI change anything in Sage 100 Contractor?

No. Junction is read-only: it cannot create, edit or delete a record.

Connect · Construction accounting

Sage 100 Contractor MCP server: connect Sage 100 Contractor to Claude and ChatGPT

Sage 100 Contractor (formerly Master Builder) is accounting and job-cost software for small and mid-size contractors, running on a SQL Server database. Junction is a read-only MCP server for construction software, and Sage 100 Contractor is in its next wave of systems.

Next wave · Through the Junction agent

How Junction connects to Sage 100 Contractor

Sage 100 Contractor keeps its data in a database. The small Junction agent runs on the same network, reads it with a read-only login and connects outward to Junction, so no inbound firewall port is opened. Sage 100 Contractor's API reference is public.

Questions you could ask about Sage 100 Contractor

“Which jobs have costs ahead of billings?”
“What is the job-cost summary for every open job?”
“Which subcontractors are owed retention?”

Answers come from your own system, with the source rows and the time the data was last updated.

What to know

Not available yet. Sage 100 Contractor is in Junction's next wave of systems: widely used (markets: United States) and readable without writing to it. We build each mapping from the vendor's own reference and check it with a customer who runs the system before calling it live.
Integration routes found in our research: SQL (direct DB).
When we researched this in October 2026 we found no MCP server from the vendor.
Payroll and personal data are denied by default.

Frequently asked questions

Is there an MCP server for Sage 100 Contractor?: Not yet. Junction is a read-only MCP server for construction software, and Sage 100 Contractor is in its next wave of systems. It is not available today; tell us you run Sage 100 Contractor and it moves up the list.
Is Sage 100 Contractor supported today?: No. Sage 100 Contractor is in our next wave, which means it is next in line to be built, not that it works today. Tell us you run it and it moves up the list.
Can the AI change anything in Sage 100 Contractor?: No. Junction is read-only: it cannot create, edit or delete a record.

Run Sage 100 Contractor? Tell us.

We bring each system online with a customer who uses it. Early customers shape what we build first.

Reach out to sales

See every system we support or plan to support

Sage 100 Contractor is a product of Sage. Junction is not affiliated with, endorsed by or sponsored by Sage; product names are used only to describe compatibility.