Factorial
Factorial is an all-in-one HR, payroll, time, talent, finance, and IT management platform headquartered in Barcelona, Spain, used by 16,000+ companies worldwide. The Factorial public API is a date-versioned REST API (current major 2026-04-01 "Legendre") covering employees, contracts, attendance, time off, payroll, ATS, performance, trainings, projects, finance, banking, procurement, IT assets, documents, webhooks, and an Approvals workflow surface. Authentication uses OAuth2 (on behalf of a user) or an x-api-key header (on behalf of the company), with 30+ scopes for granular partner access. Factorial publishes the OpenAPI schema and generated SDKs (Ruby, Python, Java, PHP, TypeScript, Node.js) at github.com/factorialco/oas and exposes an llms.txt index for AI agents.
APIs
Factorial Core Employees API
List, read, create, and update employees in the Factorial HR directory. The Core Employees v2 API exposes a clean, non-data-intensive employee record (replacing the legacy v1 sh...
Factorial Webhooks API
Subscribe to lifecycle events fired by Factorial (employee created, employee terminated, attendance clock-in/out, ATS application created/updated, time-off leave created/approve...
Factorial ATS API
Applicant Tracking surface — Candidates, Applications, Application Phases, Job Postings, Feedback, Evaluation Forms, Answers. Read, create, update, and delete candidates and app...
Factorial Attendance API
Manage attendance shifts, breaks, overtime requests, timesheet edits, and attendance reviews. v2026-04-01 introduces an api_source field on shift DTOs so integrations can identi...
Factorial Time Off API
Time-off leaves, leave types, and time-off allowances with enriched statistics. Trigger webhooks on leave creation, update, and approval. Combine with the Approvals API to progr...
Factorial Contracts and Compensations API
Manage contract versions and compensation records. v2026-04-01 is a breaking-change release that removes legacy job catalog fields (job_title, professional_category_id, professi...
Factorial Payroll API
Payroll supplements, payroll identifiers, family situations, and bookkeeper resources. Backs Factorial's integrations with country- specific payroll engines.
Factorial Finance and Banking API
Bank accounts, transactions, ledger accounts, journal entries, tax rates and tax types, cost centers, cost center memberships, and budgets. Cost center memberships are bulk-upda...
Factorial Expenses API
Submit, approve, and reconcile employee expenses, mileage claims, and per-diem requests.
Factorial Documents API
Manage company- and employee-scoped documents and folders. Create, update, retrieve, and delete documents, request legal e-signatures, and fire document_created webhook events. ...
Factorial Performance API
Performance reviews, review processes, evaluations, and performance agreements. Configurable review cycles backed by the Job Catalog Tree introduced in v2026-01-01.
Factorial Trainings API
Manage training programs and training classes, expanded in v2026-04-01 with new class-level capabilities.
Factorial Job Catalog API
Job levels, roles, functions, and the hierarchical Job Catalog Tree introduced in v2026-01-01. Replaces the legacy free-text job_title on contracts via job_catalog_tree_node_uuid.
Factorial Project Management API
Projects, subprojects, tasks, project workers, planned and flexible time records, and budget strategies (full CRUD added in v2026-04-01).
Factorial IT Management API
IT asset and IT model endpoints (added in v2026-01-01) backing the SaaS, Inventory, MDM, and Cybersecurity modules.
Factorial Procurement API
Purchase orders, purchase requests, and purchase types. Added in v2026-01-01.
Factorial Approvals API
Programmatically approve or reject pending steps of a materialized approval flow, either by id or by resource_id+resource_type. Added in v2026-04-01.
Factorial Locations and Holidays API
Company locations, work areas, and company holidays.
Factorial Custom Fields API
Define custom fields, options, values, and schemas to extend Factorial resources with company-specific metadata.
Factorial Posts and Communities API
Groups, posts, and comments backing the Communities V2 feature. Requires Communities V2 to be enabled on the company.
Factorial Marketplace and Integrations API
Integrations Framework and Marketplace endpoints used by partner integrations to register, surface, and operate within the Factorial app.
Factorial Keys and OAuth API
Two authentication methods. OAuth2 (authorization code flow at /oauth/authorize and /oauth/token) is used to act on behalf of a user; Credentials/API Keys (x-api-key header) are...