MCP
A2AWhat is a Unified API?
A unified API provides a single, standardized interface to interact with multiple third-party providers. Instead of learning each provider’s unique API format, authentication scheme, and data model, you write code once, and StackOne handles the differences. What StackOne normalizes:- Data models – Consistent field names and structures across providers (e.g.,
employeesin BambooHR, Workday, and Personio all return the same schema) - Authentication – OAuth, API keys, and tokens are managed per-provider; you just pass an
x-account-idheader - Pagination – Cursor-based pagination works the same regardless of whether the provider uses offsets, pages, or cursors
- Error formats – Standardized error responses with provider-specific details when available
Benefits of the HRIS API
Real-Time Data Synchronization
Real-Time Data Synchronization
StackOne’s APIs support real-time data polling, allowing for immediate updates and synchronization across platforms.
Privacy-First Design Ensuring Compliance
Privacy-First Design Ensuring Compliance
With a focus on security, StackOne’s architecture avoids unnecessary data storage, maintaining compliance with data protection regulations.
Synthetic and Native Webhooks for Updates
Synthetic and Native Webhooks for Updates
The platform provides both synthetic and native webhooks, enabling real-time notifications for employee and payroll changes.
Comprehensive HRIS Integration Coverage
Comprehensive HRIS Integration Coverage
StackOne offers pre-built connectors with a wide range of HRIS platforms, simplifying the integration process.
Key Features
The table below shows key features of the HRIS API that make human resources management easier, from real-time employee tracking to payroll management:| Feature | Description |
|---|---|
| Comprehensive Employee Management | Easily create, update, and retrieve employee profiles, including personal information and employment history. |
| Payroll and Compensation Management | Manage payroll data, track compensation ranges, and update salary information for employees. |
| Leave and Attendance Tracking | Monitor and update employee attendance, time-off requests, and manage leave balances. |
| Real-Time Webhooks | Receive instant notifications for changes in employee profiles, payroll, or leave data. |
| Document Management | Upload, download, and manage employee documents such as contracts and performance reviews. |
| Benefits Management | Record and manage employee benefits, including health, retirement, and wellness programs. |
| Employee Onboarding and Offboarding | Handle employee onboarding, document signing, and offboarding processes, tracking key milestones. |
StackOne SDKs & OpenAPI Specification
Use our official SDKs for faster integration. Build with language-native libraries. Full list here.
OpenAPI Specification
Popular SDKs
Entity Model and Relationships
The following diagram illustrates the key entities within the HRIS API: The following table outlines key entities within the HRIS system and provides a brief description of each.| Entity | Description |
|---|---|
| Companies | Represents the high-level organizational details of companies present in the underlying system, such as name, display name, and other identifiers. |
| Employees | Contains comprehensive information about employees, including personal details, contact information, and relationship to other entities. |
| Employments | Details the employment records of each employee including job positions, start and end dates, compensation details, and more. |
| Locations | Manages information about the work locations. Location may contain a name associated contact details. |
| Time Off | Manages records of employee leave requests and their approval status, including request type, duration, and related policies. |
| Time Off Balances | Tracks the available balance of time off for employees according to specific policies. |
| Time Off Policies | Defines the policies governing time off requests, including types of leave, duration units, and associated reasons. |
| Benefits | Manages information about employee benefits programs, providers, and descriptions. |
| Groups | Organizes employees into logical groupings such as departments, teams, and cost centers. |
| Jobs | Represents job positions available within the organization, including titles and statuses. |
| Time Entries | Records employee work time entries, including start and end times, breaks, and status. |
| Work Eligibility | Tracks employee work authorization documents such as visas, passports, and other legal identification. |
| Documents | Manages employee-related documentation including personal identification, contracts, and administrative forms. |
| Skills | Represents employee professional skills, proficiency levels, and related attributes. |