Introduction

Build on top of Part3 — the construction project management platform for general contractors, consultants, and owners.

Part3 exposes two programmatic surfaces:

JSON over HTTPS. Read and write projects, documents (RFIs, submittals, bulletins), drawings, and org data. Works with any HTTP client.

Model Context Protocol server for AI assistants — Claude Code, Claude Desktop, Cursor. Pre-built tools that call the REST API on your behalf.

What you can build

Internal tools that pull project health, overdue documents, and communication history into spreadsheets or dashboards
AI assistants that answer questions about your construction projects directly inside Claude or Cursor
Integrations that push RFIs, submittals, or drawing packages into downstream systems (Procore, BIM 360, email, Slack)
Data pipelines that snapshot document activity, stat summaries, or directory data into your warehouse

Organization → Project → Document
                      → Drawing
                      → Contact / Consultant

Organizations — companies (GCs, engineering firms, owners) with billing plans and storage locales (CA / US)
Projects — construction jobs (Contract Administration or Site Review); each has contacts, budgets, schedule dates, and a document log
Documents — the core work items: RFIs, submittals, bulletins, change orders, certificates, instructions, quotes. Each has a lifecycle (draft → pending → submitted → issued/closed), a due date, assignees, comments, and a full activity trail
Drawings — versioned construction drawings organized into packages per project

See the Quickstart to make your first call in under five minutes.