# Justworks

**Canonical:** https://apis.io/providers/justworks/  
**Website:** https://www.justworks.com  
**APIs profiled:** 11

Justworks is a New York City-based Professional Employer Organization (PEO) and small-business HR platform. It bundles payroll, tax filing, multi-state compliance, large-group medical/dental/vision benefits, 401(k) administration, workers comp, time tracking, and HR consulting into a single per-employee-per-month subscription. Justworks operates four primary products: Justworks Payroll (standalone payroll), Justworks PEO Basic, Justworks PEO Plus (PEO with included benefits package), and Justworks EOR International for hiring full-time employees abroad without a local entity. Justworks exposes a Partner API at public-api.justworks.com for approved integration partners, covering Members, Company, Payroll, Paystubs, Deductions, Time Off, and Webhooks. The API uses OAuth 2.0 authorization-code grant, cursor pagination, signed at-least-once webhooks, and zero-decimal currency representation. Deductions is the primary write surface; everything else is read-only.

## Kin Score — 53.8 / 100 (developing)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 53.8).

| Facet | Score |
|---|---|
| Discoverability | 64.8 |
| Contract Quality | 66.9 |
| Governance | 9.8 |
| Contract Governance | 9.8 |
| Operational Transparency | 23.7 |
| Developer Ergonomics | 50.0 |
| Commercial Clarity | 53.9 |
| Access Clarity | 53.9 |

Regulatory layer — **Insurance**: 64.4 (matched via tags).

## Agent readiness — 31.1 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | documented |
| MCP Server | no |
| Auth Clarity | yes |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Paid · Self-serve signup — onboarding: self-serve, pricing: paid, trial: no (confidence: high).

## APIs (11)

- **Justworks Members API** — Read employee, contractor, and member information from the Justworks Partner API. Provides access to member profiles, employment history, pay history, custom-field values, and U...
- **Justworks Company API** — Read company-level data from the Justworks Partner API including company identity, departments, offices, bank account on file (masked), verified business information, custom-fie...
- **Justworks Deductions API** — Manage employee deductions — list deduction types, create one-time and recurring deductions, update existing deductions, and cancel deductions in bulk. The primary write surface...
- **Justworks Webhooks API** — Manage Justworks Partner API webhooks. Justworks signs every request, delivers events at-least-once with automatic retries, and closes a webhook on sustained failures (resumable...
- **Justworks OAuth API** — OAuth 2.0 token endpoints for the Justworks Partner API. Authorization code is the only supported grant for initial token acquisition; refresh token grant is supported for renew...
- **Justworks Deduction Types API** — Read access to Justworks deduction type catalog
- **Justworks Payrolls API** — Read access to payroll runs and per-payroll fees
- **Justworks Paystubs API** — Read access to per-member paystubs
- **Justworks Time Off Balances API** — Asynchronous balance reports for time-off policies
- **Justworks Time Off Policies API** — Read access to time-off policy catalog
- **Justworks Time Off Requests API** — Read access to time-off requests submitted by members

## Agentic access (1)

- **Justworks Agentic Access** — 27 operations · 9 acting · 1 human-in-the-loop

## Security (3)

- **Justworks Authentication** — oauth2 · 1 scheme
- **Justworks Domain Security** — TLSv1.3 · DMARC
- **Justworks Vulnerability Disclosure** — security.txt · contact published

## Plans (1)

- **Justworks Plans Pricing**

## Tags

PEO, Payroll, HR, Human Resources, Benefits, Health Insurance, 401k, Time Off, Compliance, Small Business, Employer of Record, HRIS

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/justworks/). Scores are computed from the provider's own public artifacts under a published rubric.