How simPRO API access works, what the simPRO API lets you connect, and when you need a developer to do it properly.
Trade and field service business owners, operations managers who want to connect simPRO to other systems and need to understand how its API works before committing to anything.
How do I get simPRO API access and what can I actually connect simPRO to?
simPRO uses OAuth 2.0 credentials issued from your simPRO build, with API access enabled per company. The exact screens move around as simPRO updates its interface, so rather than repeat a menu path that may already be out of date, the reliable source is the official documentation: simPRO developer documentation.
simPRO API access depends on your plan and must be enabled on the build. Confirm it is available before scoping any work, because it is not on by default everywhere.
Treat API credentials like a password. Anyone holding them can read and often write data in your simPRO account. Do not paste them into untrusted tools, and do not send them over email or chat.
The simPRO API gives you programmatic access to the core data in your account. Broadly that covers:
With that access you can push data into accounting or reporting systems, keep records in step across tools, and build dashboards from live simPRO data rather than from exports someone has to remember to run.
Zapier support for simPRO is limited. Zapier coverage is limited, so most simPRO integrations use the API directly. That is why searches for connecting simPRO through no-code tools tend to turn up workarounds rather than a clean answer.
Connecting simPRO to another system means working through five things, in roughly this order:
A common pairing is simPRO with Xero or MYOB. Read-only reporting is usually straightforward. Live two-way sync is where the mapping and error handling turn it into a proper development project.
Some simPRO API work is genuinely straightforward. Some is not. An honest split:
Progress claims, retentions and variations are common in trade work and are not simple invoice pushes.
Labour, materials and overhead must all land against the right cost centre or margin reporting is fiction.
Award rates, allowances and overtime are not something to approximate.
Separate simPRO companies mean separate data sets that a single integration has to keep apart.
These integrations look simple from the outside. The work is in the detail: field mapping, conflict resolution, error recovery, and keeping everything in step as both simPRO and the connected system change over time.
If the integration touches invoicing, stock or payroll, getting it wrong has real financial consequences. A properly built integration with monitoring and alerting is worth the upfront cost.
Tell us what you are comparing, replacing, or trying to improve. We will come back with a practical recommendation and realistic scope.
