Sling API
Sling is a cloud workforce management platform—now part of Toast—for employee scheduling, time tracking, team communication, task management, PTO, and labor-cost control across shift-based businesses. An unofficial API lets you programmatically pull shifts, timesheets, employees, groups, and locations, and push updates like new shifts, time-off approvals, and schedule changes back into Sling.
What is Sling?
Sling is a cloud-based workforce management platform—now part of Toast—that helps shift-based businesses schedule employees, track time and attendance, communicate with their teams, and control labor costs. Managers build schedules with built-in labor-cost optimization and overtime alerts, employees clock in and out from a mobile time clock with geofencing, and the whole team coordinates through messaging, a newsfeed, task assignments, and PTO requests across one or many work locations.
Core product areas include:
- Shift Scheduling (schedule building, shift trades, availability, multi-location)
- Time & Attendance (mobile time clock, terminals, geofenced clock-in/out)
- Communication (group and private messaging, announcements, newsfeed)
- Task Management (per-shift and per-employee task assignment)
- PTO & Availability (leave caps, approval workflows, time-off tracking)
- Labor Cost & Reporting (budgets, wages, overtime thresholds, custom-period reports)
Common data entities:
- Shifts, Schedules, Shift Trades, Open Shifts
- Employees/Users, Roles, Wages, Availability
- Timesheets, Time Clock Entries, Attendance Records
- Work Locations, Groups/Departments, Positions
- PTO Requests, Leave Types, Approvals
- Messages, Announcements, Tasks
The Sling Integration Challenge
Shift-based operators run daily scheduling and payroll-critical workflows on Sling, but turning its mobile-first, account-scoped platform into reliable API-driven automation is non-trivial:
- Token access mirrors a user: the Sling token carries the same permissions as the user it belongs to, so admin, manager, and employee tokens each see a different slice of data
- Mobile-first surfaces: much of the richest data (geofenced clock-ins, shift trades, messages) is captured through the iOS and Android apps rather than a web export
- Multi-location, multi-group hierarchy: schedules, positions, and wages are scoped per location and group, so a single pull must reconcile many org units
- Payroll-grade accuracy: timesheets, breaks, overtime, and PTO must be exported without drift to feed payroll, HR, and POS platforms downstream
- Login-based auth and session handling: requests authenticate through an account login that issues a token, which must be refreshed and stored securely for headless use
- Toast platform evolution: as Sling integrates into Toast, endpoint coverage and data shapes can shift, breaking brittle one-off integrations
How Supergood Creates Sling APIs
Supergood reverse-engineers Sling's authenticated login flow and account-scoped API surface to deliver a resilient, normalized API layer for your Sling organization—across scheduling, time tracking, and team data, on web and mobile surfaces alike.
- Handles account login and token issuance securely, with automatic refresh for headless operation
- Respects the token's user-level permissions and surfaces the right data per admin, manager, or employee scope
- Normalizes shifts, timesheets, employees, groups, and locations into consistent objects so you integrate once across every location
- Reconciles multi-location and multi-group hierarchies, wages, and PTO so payroll and HR downstreams stay accurate
Use Sling with AI agents: Sling MCP Server →
Getting Started
- Schedule Integration Assessment
Book a 30-minute session to confirm your locations, groups, and authentication model.
- Supergood Generates and Validates Your API
We deliver a production-ready Sling adapter tailored to your organization, locations, and permission scopes.
- Deploy with Monitoring
Go live with continuous monitoring and automatic adjustments as Sling and Toast evolve.
API Endpoints
Authentication
/account/loginAuthenticate with account credentials and obtain an authorization token scoped to the user's permissions for downstream calls.
Scheduling
/shiftsList scheduled shifts across locations and groups with filters for date range, position, employee, and published status.
Scheduling
/create_shiftCreate or publish a new shift against a location, group, and position, optionally assigned to an employee.
Time Tracking
/timesheetsRetrieve timesheets and time-clock entries including clock-in/out times, breaks, and overtime for payroll export.
Workforce
/usersList employees and users with roles, wages, availability, and group/location membership.
Time Off
/approve_ptoApprove or reject a PTO request against an employee's leave type and remaining allowance.
Use Cases
Export schedules and timesheets to payroll and HR
- Pull published shifts, timesheets, breaks, and overtime across all locations into a single payroll feed - Map employees, wages, and positions to your payroll or HRIS records - Reconcile PTO and leave balances so paid time off flows through without manual entry
Sync labor data into BI and POS platforms
- Stream shift and labor-cost data to BI tools for scheduled-vs-actual labor analysis - Join Sling timesheets with POS sales to compute labor as a percentage of revenue - Surface overtime and budget-overrun alerts to operations dashboards
Automate scheduling and shift coverage
- Push generated schedules and open shifts into Sling from a forecasting or labor-optimization engine - Detect uncovered shifts and trade requests and route them to eligible employees - Keep availability and time-off updates in sync so the schedule stays conflict-free
Keep employee and location data in sync
- Onboard and offboard employees and propagate roles, wages, and group membership - Mirror work locations, positions, and departments across connected systems - Trigger downstream workflows when an employee, location, or wage changes
Technical Specifications
Authentication
Account login (email/password) issuing an authorization token, handled in a managed session
Connectivity
Authenticated requests against the account-scoped Sling API surface (api.getsling.com), web and mobile flows
Response format
Normalized JSON across Shifts, Timesheets, Users, Groups, and Locations objects
Rate limits
Adaptive throttling tuned to your organization to stay within Sling-side limits
Session management
Automatic token refresh and credential rotation for headless operation
Data freshness
Near real-time pulls for shifts and clock entries with optional scheduled batch syncs
Security
Encrypted credential vault, scoped access tokens, SOC 2-aligned controls, and audit logging
Webhooks
Event-style callbacks for shift publish, clock-in/out, PTO approval, and schedule changes
Latency
Sub-second reads on cached entities; multi-second writes when posting shifts and approvals
Throughput
Horizontally scaled workers sized to multi-location, multi-group scheduling volume
Reliability
Retry, backoff, and idempotency keys for shift creation, edits, and PTO approvals
Adaptation
Continuous monitoring of Sling and Toast platform releases and account configuration drift
Frequently asked questions
Yes. Supergood normalizes both scheduling data (shifts, open shifts, trades) and time-and-attendance data (timesheets, clock-in/out entries, breaks, and overtime) through one consistent API surface, so you can feed payroll and reporting from a single integration.
Sling tokens carry the same permissions as the user they belong to. Supergood logs in through the account flow, manages and refreshes the token securely, and surfaces exactly the data that scope permits—admin, manager, or employee.
Yes. Supergood reconciles Sling's multi-location and multi-group hierarchy, so shifts, positions, wages, and timesheets are returned as normalized objects you can query across the whole organization rather than location by location.
Yes. Supergood operates against Sling's authenticated API surface and continuously monitors for changes as Sling integrates into Toast, adapting the adapter so your integration keeps working as endpoints and data shapes evolve.
Both. Beyond reading shifts, timesheets, and employees, you can push updates—create or publish shifts, approve PTO requests, and update availability—so Sling stays in sync with upstream forecasting and labor systems.