Gusto API

Overview

Gusto is a payroll and HR platform built for small to mid-market businesses, serving more than 300,000 companies across the United States. Its platform combines payroll processing, benefits administration, time tracking, hiring, and HR compliance in a single product, and it is particularly common among startups, professional services firms, and tech companies that grew past spreadsheet-level HR before switching to an enterprise system. For HR-tech companies and finance automation platforms targeting the small and mid-market segment, Gusto is a high-priority integration: a meaningful share of their target customer base runs payroll through it.

Unlike most payroll platforms, Gusto offers a self-serve developer API. The OAuth 2.0 flow is documented, developer accounts are available without a partner approval process, and the official API does cover the core data model: employee records, payroll runs, benefits plans, and time-off policies are all accessible. Where teams consistently run into the wall is payroll detail. The official API returns run-level payroll summaries but does not expose per-employee earning breakdowns in full: gross pay, individual deductions, and net pay per employee per run are not reliably available through the documented endpoints. Contractor payment details are absent entirely. Garnishment records, which payroll-adjacent compliance tools need, are not in the API surface. These are not edge cases: they are the fields that payroll data consumers almost always need.

Integuru fills the coverage gap by generating a production-ready HTTP API using direct HTTP requests against the same endpoints the Gusto web application uses for its own payroll register, employee detail, and contractor payment views. The result covers the full payroll data surface, including the earning-level detail the official API leaves out, without requiring your team to work around summary-only responses or stitch together multiple incomplete endpoints.

Why Teams Need This Integration

Gusto's API coverage gaps consistently block the same categories of product.

Payroll data and finance automation platforms. Tools that ingest per-employee payroll data to automate accounting entries, power payroll analytics dashboards, or feed general ledger reconciliation workflows need get_payroll_detail at the earning-line level: gross pay, deductions by type, net pay, and employee IDs per run. The official Gusto API's payroll run endpoint returns aggregate totals but does not expose the per-employee breakdown that downstream systems require. A finance automation platform that cannot pull this detail cannot deliver the automated journal entries its customers expect.

Contractor and mixed-workforce management tools. Many Gusto customers run payroll for both W-2 employees and 1099 contractors in the same platform. Workforce management tools, EOR platforms, and freelance management systems that need to track contractor payments alongside employee payroll cannot get contractor payment data through the official Gusto API. Integuru reaches the contractor payment endpoints the Gusto web application uses directly, making mixed-workforce queries possible in a single API surface.

Compensation and equity platforms. HR platforms that display total compensation alongside salary need the benefits contribution amounts from list_benefits: employee and employer contributions per plan type, enrollment counts, and plan details. These numbers change when employees update their elections during open enrollment, and a compensation platform that cannot stay synchronized with Gusto misrepresents total comp to its users.

Leave management and scheduling systems. Workforce planning tools and scheduling platforms need get_time_off_balances to reflect actual accruals before they schedule coverage or approve time-off requests. list_time_off_requests gives these tools a live view of pending and approved absences by policy type and date range, feeding scheduling logic that depends on knowing who is actually available.

Workforce Workflows This Integration Covers

The seven planned actions cover the employee, payroll, benefits, and time-off data surfaces that the official Gusto API exposes incompletely or not at all:

• Employee data: list_employees and get_employee_detail surface the workforce roster with compensation, department, tax information, start date, and benefits enrollment for HRIS sync, compensation platforms, and people analytics tools.
• Payroll detail: list_payroll_runs and get_payroll_detail deliver the run-level index and the per-employee earning breakdown, including gross pay, deductions by type, net pay, employee IDs, and pay period dates, that finance automation and payroll reconciliation systems need beyond what the official API summary endpoint provides.
• Time-off data: list_time_off_requests and get_time_off_balances feed leave management systems, scheduling platforms, and HR portals with pending requests and current policy balances across vacation, sick, and PTO policy types.
• Benefits: list_benefits delivers company benefit plan data with enrollment counts and contribution amounts at both the employee and employer level, for compensation platforms and benefits administration tools that need to stay in sync with Gusto as the enrollment system of record.

Adjacent Integrations

Integuru already operates in the workforce and scheduling vertical in production. The HomeBase integration delivers 5 live actions covering timesheet totals, wages, employees, timesheets, and upcoming appointments for hourly workforce businesses. The Workeasy integration delivers 8 live actions covering employees, schedules, punches, pay periods, org nodes, timesheet segments, and employee details for workforce management teams. Both use the same direct HTTP approach that fills coverage gaps rather than waiting for an official API to add endpoints that have been missing for years.