simPRO API integrations: connecting AU trades to the stack

Quick answer: simPRO is the dominant job management platform across mid-market and larger Australian commercial trades operators — multi-van plumbing, electrical, HVAC, security and facilities-maintenance businesses. The REST API is well documented and the entities you’d expect to integrate against (jobs, customers, sites, quotes, invoices, schedules, employees) are all exposed. Where simPRO works well, integration tends to be about bridging it cleanly into the layer the office staff and customer-facing teams need: a customer-facing portal, an accounting reconciliation that doesn’t lose hours every fortnight, marketing automation tied to job lifecycle events, and capacity-aware decisions about which jobs to chase and when.

simPRO is built for the operational complexity that trades businesses run into once they cross from “a tradie with a ute” to “five vans, an office, a service-agreement book and a project pipeline.” That’s a different problem from the small-trades world where Tradify or ServiceM8 make more sense. For the businesses simPRO is built for — commercial-led, multi-trade, service-agreement-heavy, often running both reactive and project work in parallel — the question isn’t whether to use simPRO. It’s how to wire it more cleanly into the rest of the operation.

Four patterns cover most of the integration work trades and field-service operators come to us about.

What simPRO’s API actually gives you

simPRO’s REST API covers the entities you’d expect for a commercial job management platform: companies (the simPRO tenant), employees, customers, sites, jobs, quotes, projects, invoices, payments, schedules, assets and catalogues. Authentication is OAuth 2.0 against the simPRO tenant’s domain, with refresh-token handling that’s reasonably standard. Documentation lives at developer.simprogroup.com and covers the endpoints we typically work with.

In our experience, the API is mature and stable. Pagination, filtering and field selection all work as documented. The platform supports webhooks for a useful subset of events — job status changes, schedule updates, invoice events — which makes the typical lifecycle-driven integration patterns simpler to build than against platforms that require polling.

What that means practically: if you can describe an integration in terms of jobs, sites, customers and the schedule, you can build it. The patterns below are the ones we see most often.

Pattern 1: Customer-facing portal

simPRO has internal portals for staff and a service-area portal for some customer interactions. For commercial trades businesses where the customer base includes facility managers, building managers, large-portfolio property owners and similar — the people who need real-time visibility into every job across every site under their management — the standard simPRO portal often doesn’t go deep enough.

The pattern we build most often is a custom portal on the trades operator’s domain that lets the customer log in and see every job across every site they manage, in real time. Job status, technician on the way, ETA, photos uploaded from site, completion reports, signed-off PDFs, current invoices, payment status, full service history per site. For commercial customers with hundreds of sites under their portfolio, this kind of visibility is the difference between “your trades partner” and “a tradie you call when something breaks.”

The simPRO entities driving this are customers, sites, jobs, job notes, attachments, schedules and invoices. The portal authenticates against the customer record, scopes every read to the customer’s permitted sites, and renders the same data simPRO holds internally with a UX designed for the customer’s job rather than the office staff’s job.

Pattern 2: Accounting reconciliation

simPRO has built-in connectors for Xero and MYOB. They cover the basics. For larger operations — service-agreement-heavy businesses with retention billing, project-based revenue recognition, or multi-entity company structures — the standard connectors often don’t handle the edge cases cleanly, and the result is either bookkeeper time spent reconciling exceptions or a quarterly cleanup that nobody enjoys.

The pattern we build is a custom reconciliation layer that handles the specific accounting rules the business actually runs on: how service-agreement revenue is recognised, how project milestones map to invoice draws, how GST is treated on labour vs materials, how inter-entity transfers are booked, and how retention is held and released. The simPRO API gives us the source data; the integration writes correctly to Xero or MYOB on the schedule the accounting team needs.

In our experience, this is where the highest-ROI work tends to live for established commercial trades operators. The labour saving on bookkeeping alone is meaningful, and the strategic benefit — being able to see margin per service agreement, per project, per crew — influences operational decisions in ways spreadsheet-driven reporting struggles to.

Pattern 3: Marketing automation tied to job lifecycle

simPRO is excellent at managing jobs. It is not a marketing platform. For commercial trades businesses that care about reactive vs proactive work mix, customer retention, review generation, or feedback collection, the gap between simPRO and the marketing layer is usually a meaningful one.

The pattern we build is a webhook-driven sync that fires marketing automation actions on simPRO job-lifecycle events: a job completed triggers a follow-up email to the customer asking for a review; a service agreement renewal coming up triggers an automated outreach to the facility manager; a customer who hasn’t had a call-out in twelve months triggers a check-in workflow; a job marked as needing a follow-up quote triggers a different workflow that escalates to the sales team if it stalls.

The marketing platform on the receiving end is typically GoHighLevel, HubSpot, ActiveCampaign or Mailchimp — same as for the allied-health clinics we work with. The simPRO side authoring the events; the CRM side handling the conversation; clear boundary, no duplicated logic.

Pattern 4: Capacity-aware operational reporting and ad-spend decisions

The most strategic integration we build — and one of the patterns underpinning our own IntelliClinic platform’s trades-vertical expansion — is reading simPRO’s live schedule and backlog data and feeding it into operational reporting or marketing decisions.

simPRO’s schedule and job endpoints expose the data: how many open job slots each crew has across the next two weeks, how deep the unscheduled backlog runs, which service categories are over- or under-loaded, where the bottleneck is on any given day. Pulled hourly into a normalised capacity model, this can drive: an operations dashboard the owner can read on a phone (utilisation per crew, per service type, per branch); marketing automation that throttles Google Ads spend when the team is booked solid and scales it back up when capacity opens; and reporting that surfaces structural issues (a crew member persistently underutilised, a service category losing margin) earlier than spreadsheet-driven review would.

For commercial trades businesses doing meaningful Google Ads spend, this is the integration that closes the loop between “we are paying for clicks” and “we have crews with capacity to fulfil the work those clicks turn into.”

Where simPRO stops being the right answer

simPRO is built for genuine commercial complexity. There are a few specific cases where, in our experience, an integration alone isn’t enough and a different conversation is worth having:

• Single-van or small operators. simPRO’s licence cost and operational complexity rarely justify themselves below a certain operational scale. Tradify or ServiceM8 cover that segment better, and we’ve built integration work against both. If the question is “should we be on simPRO or Tradify,” the answer often depends more on operational scale than on integration capability.
• Domestic-led residential operators. simPRO is built around the commercial workflow shape. Residential-led businesses sometimes find the platform heavier than they need; this is more of a workflow / operational fit conversation than an integration one.
• Multi-entity corporate structures with strict separation requirements. simPRO supports multiple companies natively, but for businesses with complex tax, ownership or compliance requirements across legal entities, the simPRO-side configuration needs care, and integration projects need to respect those boundaries explicitly. Worth a conversation before assuming a single-tenant integration pattern will fit.

For everything that does fit simPRO’s shape, the API is one of the more pleasant ones we work against in the trades space.

How we usually approach a simPRO integration project

The work tends to fall into three sequential pieces:

1. Audit the operation and its actual workflow. What the office team, the schedulers, the techs in the field, and the customers all do today. The integration only earns its place if it removes friction someone is actually feeling.
2. Build the missing layer. Whichever of the four patterns above (or some combination) the audit points at. simPRO stays the source of truth; the integration sits on top.
3. Validate against the live simPRO account before cutover. Every simPRO tenant has its own configuration shape — how cost centres are structured, how service agreements are modelled, how custom fields are used. Every integration we build needs to be sanity-checked against the actual data shape before it goes anywhere near a live customer interaction.

If you’re running a simPRO-based commercial trades business and weighing custom work, we’re happy to walk through your situation specifically. The patterns above cover the majority of what we see, but every operation has its own shape, and the answer to “what should we build” usually starts with “here’s what your week actually looks like.”