eSUB API
eSUB has no public developer portal or self-serve REST API; an API Terms of Use page indicates programmatic access exists for partners under contract. The documented integration surface is prebuilt connectors: QuickBooks Online, Sage 300 CRE, Viewpoint Vista, and Autodesk BIM 360.
Frequently asked questions
eSUB scores D on the API Report Card. eSUB has no public developer portal or self-serve REST API; an API Terms of Use page indicates programmatic access exists for partners under contract. The documented integration surface is prebuilt connectors: QuickBooks Online, Sage 300 CRE, Viewpoint Vista, and Autodesk BIM 360.
Without a usable official API, teams fall back on manual exports, file drops, or one-off vendor integrations. The other option is an unofficial API layer like Supergood that automates the authenticated web app directly.
eSUB Cloud is a cloud-based construction project management platform purpose-built for commercial construction subcontractors.
Construction, specifically commercial construction subcontractors across the trades: electrical, mechanical/HVAC, plumbing, drywall, concrete, masonry, structural steel, and glazing. Field foremen and crew leads file daily reports, log labor hours and material usage, capture jobsite photos via the mobile app, and submit RFIs from the field.
Medium within its niche. eSUB is consistently cited as a leading subcontractor-specific PM platform alongside Procore (which spans GCs and subs) and is referenced in nearly every 'subcontractor software' roundup.
eSUB holds the operational backbone of a commercial subcontractor's business: every daily report and jobsite photo, foreman field notes, crew timecards and labor hours by cost code, RFIs and submittals with full revision history, change order documentation and pricing, drawing sets and markups, submittal logs, T&M tickets, job-cost ledgers, productivity analytics, and the bidirectional accounting feed to QuickBooks Online / Sage 300 CRE / Viewpoint Vista.
Mature but in mid-rebuild. Founded in 2008, eSUB has 17+ years of incumbency in the subcontractor PM niche.
No public REST API, developer portal, or webhook documentation, partners must contact eSUB directly to discuss programmatic access. QuickBooks Online integration is one-way for many object types (timecards push only); advanced PO/CO/Pay App sync was on the roadmap as of November 2023 but not yet GA. Full sourced list under Sources below.
Common alternatives include Procore, Autodesk Construction Cloud (BIM 360), Buildertrend, Fieldwire (Hilti), Raken, ConstructionOnline (UDA). Graded alternatives appear under "More from the report card" below.
Grades measure one thing: can a customer's engineering team get their own data out programmatically? We check six things (whether a real API exists, how access is gated, data coverage, auth quality, docs and developer experience, and stability) and roll them into a letter grade. Grades get re-verified, and they only move on evidence.
Yes. Supergood maintains an unofficial eSUB API and MCP server so AI agents and internal tools can read and write eSUB data. See the eSUB integration docs at supergood.ai/docs/esub-api.