Paycor API
Paycor exposes a public REST API v1 with an OpenAPI 3 spec, sandbox, and webhooks at developers.paycor.com. Access takes a developer portal application and admin approval rather than instant signup. Calls need both an OAuth 2.0 token and an Apim-Subscription-Key.
Frequently asked questions
Paycor scores A+ on the API Report Card. Paycor exposes a public REST API v1 with an OpenAPI 3 spec, sandbox, and webhooks at developers.paycor.com. Access takes a developer portal application and admin approval rather than instant signup. Calls need both an OAuth 2.0 token and an Apim-Subscription-Key.
Paycor has a workable official integration path. Most engineering teams can build against it directly. Open API: self-serve, documented, with SDKs
Paycor is a cloud-based Human Capital Management (HCM) suite covering payroll, tax filing, HR, benefits administration, talent acquisition, talent management, learning, workforce management (time/attendance, scheduling), analytics, and employee experience.
Vertical: Enterprise / HR / ERP (HCM / Payroll). Target market is U.S. small and mid-sized businesses, with a stated sweet spot of ~50-1,000 employees and a strong push upmarket into 1,000+ employee organizations. Running multi-state payroll and tax filing. Onboarding new hires (I-9, W-4, direct deposit, e-signature). Benefits enrollment and carrier connections. Time tracking, scheduling, and PTO management.
High within U.S. mid-market HCM. Pre-acquisition, Paycor served ~30,000 clients and ~2.3M employees. As part of Paychex post-April 2025, the combined entity reaches 790,000+ clients.
Headquarters: Cincinnati, OH (4811 Montgomery Road). Founded: May 1990. Founder: Robert "Bob" Coughlin. Employees: ~2,900 (pre-acquisition). Clients: ~30,000+ businesses; ~2.3M+ employees on platform. Parent: Paychex, Inc. (acquired April 14, 2025, $22.50/share, ~$4.1B EV).
Founded 1990 (35 years old). The product was rebuilt as a unified cloud HCM suite over the 2010s and modernized further through acquisitions (Nimble Schedule, Newton Software). UI is modern and responsive; mobile apps are first-class.
Grades measure one thing: can a customer's engineering team get their own data out programmatically? We check six things (whether a real API exists, how access is gated, data coverage, auth quality, docs and developer experience, and stability) and roll them into a letter grade. Grades get re-verified, and they only move on evidence.