Documentation

Gage documentation

Gage is a marketplace for cold-formed steel framing. Builders bring plans, fabricators price and build them, and partners quote their own customers through the API. These pages explain how each of those works.

Pick the section for who you are. Partners quoting through the API start with Getting started, then keep the API reference open; if you are wiring up an AI assistant, the MCP server page has the connection details. Fabricators start with the Handbook. Builders have one short guide to the project page.

Every page here lives as a markdown file in the Gage repository under content/docs, so if something is wrong or missing, say so and it is a small change.

Partners

Quote, reserve and trigger builds for your own customers through the API.

Getting started
From requesting access to your first triggered build, in seven steps.
Connecting a lead system
Turn every lead your site captures into a Gage quote automatically, and get status pushed back.
Quoting from drawings
Send a PDF plan set or a 3D model and get back the building framed in steel, as a model you can show, plus the quote.
Quote pages
Send your customer a hosted quote in your brand, and let them accept it without ever seeing Gage.
MCP server
Price a building in steel and start it with a Gage fabricator from Claude, ChatGPT or any MCP client. No account needed; partners add their API key.
Connect with Gage
Let fabricators connect their Gage account to your app with OAuth, read their shop profile, show your account inside Gage, and send them jobs.

API reference

Every endpoint, field and error, with the pricing model behind them.

API reference
Every endpoint of the Gage quoting API, with fields, errors and the pricing model behind them.

Fabricators

From application to first job, plus the estimator you embed on your own site.

Handbook
Applying, setting rates, and what happens to a job from quick quote to delivery.
Estimator widget
The instant-estimate form you embed on your own website, priced from your rates.
Fabricator FAQ
How a job reaches you, when you pay Gage, and what happens if a builder does not go ahead.

Builders

Submitting plans, choosing a shop, approving a quote, tracking the frame.

Builder guide
Submitting plans, choosing a shop, approving a quote, and following the frame to your site.

Legal

API Terms of Service
The terms for partners using the Gage API, the MCP server and anything built on them.
Privacy Policy
What Gage collects, why, who sees it, and how to have it corrected or deleted.
Terms of Use
The terms for anyone using Gage to price or build a project, on the site, through a fabricator's estimator, or from an AI assistant.