Maestro Construction ERP API
Maestro construction ERP REST API for specialty contractor project accounting, payroll, estimating, and project management with Canadian market focus. Enables AI agents to manage project setup and job costing for specialty contractor project accounting automation, handle payroll processing and union benefit management for construction workforce compliance, access estimating and bid management for construction proposal automation, retrieve accounts payable and subcontractor management for construction procurement automation, manage project billing and progress billing for specialty contractor invoice automation, handle equipment and asset management for construction equipment tracking, access labour analytics and productivity reporting for workforce performance intelligence, retrieve certified payroll and prevailing wage management for Canadian provincial labour compliance, manage multi-company and multi-project consolidation for contractor group reporting, and integrate Maestro with construction management platforms and banking systems for integrated contractor financial operations.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
Canadian construction ERP. SOC2. API key. CA. Construction payroll and project financial data.
⚡ Reliability
Best When
A Canadian specialty contractor (mechanical, electrical, HVAC, plumbing) or multi-trade contractor wanting AI agents to automate project accounting, union payroll processing, job costing, estimating, and project billing with Canadian labour compliance.
Avoid When
CANADIAN PAYROLL REMITTANCE ACCURACY: Automated payroll via Maestro for Canadian construction workers must accurately calculate and remit CRA source deductions (CPP, EI, federal/provincial income tax) and submit T4/RL-1 slips accurately; automated payroll without CRA remittance reconciliation creates Canada Revenue Agency penalty. QUEBEC FRENCH LANGUAGE COMPLIANCE: Automated Maestro documentation, invoices, and contracts for Quebec operations must comply with Bill 101 (Charter of the French Language) requirement for French-language commercial documents; automated English-only documentation for Quebec clients creates language law compliance violation. UNION COLLECTIVE AGREEMENT COMPLIANCE FOR PAYROLL: Automated payroll via Maestro for unionized construction workers must correctly apply collective agreement wage rates, overtime rules, and fringe benefit contributions per union local; automated payroll with incorrect union rate application creates grievance and back-pay liability. WSIB/WCB PREMIUM ACCURACY: Automated Maestro payroll must correctly calculate and remit provincial Workers' Compensation Board (WSIB in Ontario, WCB in other provinces) premiums per industry classification; automated incorrect WCB rate application creates provincial penalty and worker protection gap.
Use Cases
- • Managing job costs from specialty contractor finance agents
- • Processing payroll from construction workforce agents
- • Tracking projects from contractor PM agents
- • Managing subcontractors from procurement agents
Not For
- • General construction owners without trade contractor focus
- • US-only firms without Canadian operations (better alternatives exist)
- • Large enterprise GC requiring enterprise ERP scale
Interface
Authentication
Maestro uses API key authentication. REST API with JSON. Montreal, Quebec HQ (Maestro Technologies Inc.). Founded 1989. Private company. Bilingual (French/English) construction ERP focused on Canadian specialty contractors (mechanical, electrical, HVAC, plumbing). 1,000+ specialty contractor clients in Canada. Union payroll, prevailing wage, and provincial labour compliance built-in. Competes with Jonas Construction and CMiC for Canadian specialty contractor ERP.
Pricing
Montreal QC. Private Canadian company, founded 1989. 1,000+ specialty contractor clients. Bilingual FR/EN. Union payroll and CRA compliance. Per-user annual subscription.
Agent Metadata
Known Gotchas
- ⚠ NO WEBHOOKS — ALL EVENTS REQUIRE POLLING: Maestro has no native webhook support; payroll processing completion, project billing, and job cost events require scheduled polling; align polling frequency with weekly payroll and monthly billing cycles
- ⚠ API KEY ONLY — NO GRANULAR SCOPE CONTROL: Maestro API key provides broad ERP access without OAuth scope granularity; automated agents with Maestro API key access all company financial data; rotate API keys regularly and restrict to minimum-privilege service account credentials
- ⚠ CANADIAN UNION PAYROLL COLLECTIVE AGREEMENT COMPLEXITY: Automated payroll via Maestro for unionized trades workers requires correct union local rate table, overtime rules, and fringe benefit contribution rates per collective agreement; automated payroll with incorrect union agreement mapping creates grievance, back-pay, and union arbitration liability
- ⚠ CRA SOURCE DEDUCTION REMITTANCE ACCURACY: Automated payroll processing must accurately calculate CPP (Canada Pension Plan) contributions, EI (Employment Insurance) premiums, and federal/provincial income tax deductions; automated payroll without CRA remittance verification creates CRA penalty and interest on under-remittance
- ⚠ Quebec Bill 101 French language requirement — automated document generation (invoices, contracts, correspondence) for Quebec clients must produce French-language documents; automated English-only document delivery to Quebec businesses and workers creates Bill 101 violation and potential CRA/CRT complaint
- ⚠ WSIB/WCB rate classification accuracy — automated payroll for Ontario workers must correctly classify employees by WSIB industry rate class; incorrect rate class classification creates premium shortfall and WSIB audit exposure; verify WSIB rate class with insurance advisor annually
Alternatives
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Scores are editorial opinions as of 2026-03-07.