Ranked by the provider's API Evangelist rating — the Kin Score is scored per provider, not per API, so every API of a provider shares its band. How the rating works →

Strong 2 Solid coverage with minor gaps

LinkedIn Talent Solutions APIThe LinkedIn Talent Solutions API provides access to recruiting and talent management capabilities. It enab...63.3 QuickBooks Payroll and Time APIThe QuickBooks Payroll and Time API provides programmatic access to payroll and time-tracking data within Q...59.2

Developing 21 Usable, with meaningful gaps to close

Justworks Company APIRead company-level data from the Justworks Partner API including company identity, departments, offices, ba...53.4 Justworks Members APIRead employee, contractor, and member information from the Justworks Partner API. Provides access to member...53.4 Justworks Webhooks APIManage Justworks Partner API webhooks. Justworks signs every request, delivers events at-least-once with au...53.4 Factorial ATS APIApplicant Tracking surface — Candidates, Applications, Application Phases, Job Postings, Feedback, Evaluati...52.8 Factorial Attendance APIManage attendance shifts, breaks, overtime requests, timesheet edits, and attendance reviews. v2026-04-01 i...52.8 Factorial Contracts and Compensations APIManage contract versions and compensation records. v2026-04-01 is a breaking-change release that removes le...52.8 Factorial Documents APIManage company- and employee-scoped documents and folders. Create, update, retrieve, and delete documents, ...52.8 Factorial Job Catalog APIJob levels, roles, functions, and the hierarchical Job Catalog Tree introduced in v2026-01-01. Replaces the...52.8 Factorial Locations and Holidays APICompany locations, work areas, and company holidays.52.8 Factorial Payroll APIPayroll supplements, payroll identifiers, family situations, and bookkeeper resources. Backs Factorial's in...52.8 Factorial Performance APIPerformance reviews, review processes, evaluations, and performance agreements. Configurable review cycles ...52.8 Factorial Time Off APITime-off leaves, leave types, and time-off allowances with enriched statistics. Trigger webhooks on leave c...52.8 Factorial Trainings APIManage training programs and training classes, expanded in v2026-04-01 with new class-level capabilities.52.8 Factorial Webhooks APISubscribe to lifecycle events fired by Factorial (employee created, employee terminated, attendance clock-i...52.8 Check Payroll APICheck's REST API for embedding full-service payroll — companies, employees, contractors, pay schedules, pay...49.0 SAP SuccessFactors APIHuman Capital Management APIs for employee central, recruiting, and talent management.49.0 Veryfi W-9 APIThe Veryfi W-9 API extracts structured data from W-9 Request for Taxpayer Identification forms including TI...47.5 Bob Public APIBob's Public API for HR data and workflows — employee data, time off, attendance, tasks, documents/eSign, g...47.3 Codat Sync for Payroll APIThe Codat Sync for Payroll API enables HR, payroll, and vertical SaaS platforms to integrate their customer...45.6 Dynamics 365 Human Resources APIAPI for managing human resources operations including employee data, payroll integration, applicant trackin...43.0 AlayaCare Employee APIREST API for managing employee records including staff information, designations, departments, and employee...39.7

Thin 41 Limited public surface area

TIAA Payroll360 APITIAA Payroll360 enables direct API connections between HR and payroll systems and TIAA's plan administratio...38.8 Viewpoint Construction ERP APIsThe Viewpoint suite of construction ERP APIs includes Jobpac Connect, Spectrum, and Vista. These REST and w...38.8 Zoho PeopleThe Zoho People API allows you to integrate HR modules with third-party applications, extracting employee d...38.5 Zoho RecruitThe Zoho Recruit API provides REST endpoints with JSON format and OAuth2.0 authentication for integrating r...38.5 Planday APIPlanday's REST API secured by OAuth2 bearer tokens, separated into domains (HR, Absence, Pay, Payroll, Port...34.9 Cornerstone Employee and OU APISynchronize employee records and organizational unit (OU) structures between external systems and Cornersto...32.9 Employment Hero Payroll API (KeyPay)Employment Hero Payroll (formerly KeyPay) REST API for managing businesses, employees, pay runs, leave, tim...32.5 Employment Hero REST APIVersioned REST API (v1) for accessing Employment Hero HR, payroll, and employee data including organisation...32.5 Grab For Business Partner APIThe Grab For Business Partner API supports corporate travel, expense, and HR platforms that need to provisi...32.3 Oyster HR APIREST API for global employment operations including hiring, payroll, benefits, time off, expenses, invoicin...32.0 ADP Benefits Administration APIThe ADP Benefits Administration API provides access to employee benefits enrollment, eligibility, and plan ...31.3 BambooHR REST APIRESTful HTTPS API for accessing and manipulating employee data, directories, time-off, reports, and other B...31.0 Breathe HR REST APIJSON REST API for managing employees, absences, holidays, sick leaves, accounts, and related HR records ins...30.6 HiBob Bob APIREST API for the HiBob HR platform providing programmatic access to employee data, time off management, att...30.4 Holded REST APIREST API for managing invoicing, contacts, products, accounting, projects, employees, and CRM records insid...28.5 Paylocity Integrations REST APIREST API for managing employees, demographics, status, pay rates, direct deposit, deductions, earnings, tax...28.2 Velocity Global APIREST API for managing global employment operations including international hiring, employee records, payrol...28.1 Advanced Shortlist APIRank resume summaries against a job title and return topCandidates plus an executiveReport. Useful for fast...26.2 AML & Sanctions Verification APICheck a name against sanctions and AML screening data, with optional date of birth, country, and result lim...26.2 Bias and Inclusion Scan APIReview job description text for bias and inclusion issues. Returns a winner, rationale, and comparison matr...26.2 Candidate Comparison APICompare two resumes against a job title and get a winner, rationale, and skill-by-skill matrix for hiring r...26.2 Career Trajectory and Loyalty APIAnalyze resume history into trajectory, career gaps, pivots, and a loyalty score. Useful for recruiter scre...26.2 Global Salary Benchmark APIEstimate a candidate’s market salary range from job title, location, and resume content. Returns market con...26.2 Interview Prep Pack APIGenerate interview questions and target answers from a job title and resume content. Useful for structured ...26.2 Job Description Generator APIGenerate a full job description from a role title and requirements. Returns ATS, LinkedIn, and interview sc...26.2 Job Description Generator APIGenerate structured job descriptions from a title and hiring context. Returns requirements, responsibilitie...26.2 Job Positions APIList job positions with ids, names, slugs, and pagination metadata. Optionally include related roles with r...26.2 Public Holidays APIGet public holidays by country and year, plus the supported country list. Use it for business-day logic, sc...26.2 Related Job Positions Generator APIGenerate related job titles from a role name. Submit a position, poll for results, and get weighted suggest...26.2 Related Skills Generator APIGenerate related job positions or skills from a role name. Returns ranked results with weights via an async...26.2 Resume Optimize Document APIOptimize resume text or uploaded PDF/DOCX files with optional target skills. Useful for tailoring a CV to a...26.2 Resume Optimizer (ATS) APIRewrite a resume for a target job title and get before/after ATS scores, an improved version, and added key...26.2 Resume Parser APIParse PDF, DOC, DOCX, TXT, or RTF resumes into structured candidate, work history, and education data. Usef...26.2 Resume Parsing & Analysis APIParse resume files or text into structured output for ATS, screening, and candidate data workflows.26.2 Resume Screening APIScore a resume against a job title and get strengths, gaps, verdict, and security risk notes. Rank multiple...26.2 Resume/CV Job Match Score APICompare a resume file against a plain-text job description. Get match scores, explanations, and job status ...26.2 Skill Based Resume Screening APIScreen resumes from text or uploaded PDF/DOCX files using minimum years and required skills. Use it to auto...26.2 Skill Extraction APIExtract technical skills, soft skills, certifications, and experience years from resume text for ATS parsin...26.2 Skills Database APILook up skills by name and page through a skills list. Returns skill IDs, names, slugs, related skills, and...26.2 Validate Aadhaar APIValidate a 12-digit Aadhaar number from a request body string and get a boolean result. Useful for KYC and ...26.2 Working Day Calculator APICount working days between two dates for a country. Returns total days, weekends, holidays, and working_day...26.2

Emerging 13 Early or largely undocumented

ADP Recruiting APIThe ADP Recruiting API enables integration with ADP's applicant tracking system for job postings, candidate...25.4 ADP Worker Demographics APIThe ADP Workers API provides access to employee demographic and employment data including personal informat...25.4 UKG Pro HCM APIREST API for the UKG Pro HCM suite covering people, benefits, payroll, talent, recruiting, onboarding, and ...24.6 SAP SuccessFactors OData V2 APIOData V2 REST API for HXM Suite covering Employee Central, Recruiting, Onboarding, Compensation, Learning, ...22.2 SAP SuccessFactors OData V4 APIOData V4 REST API for HXM Suite providing CRUD access to Employee Central, talent management, learning, and...22.2 peopleIX MCPThe hosted, remote Model Context Protocol server through which peopleIX exposes a customer's People Intelli...21.6 Paychex Developer APIsThe Paychex Developer Program offers a library of APIs to automate, standardize, and simplify integrations ...21.3 Dolibarr REST APIREST API for the Dolibarr ERP/CRM platform providing full CRUD operations on business objects including con...21.1 Unit4 ERPx REST APIComprehensive REST API for Unit4 ERPx cloud ERP platform covering time and expenses, personnel, payroll, pr...19.9 UCSB Employees APIsAPIs offering faculty and staff details such as the Employee Job API and related identity mapping services.19.7 Common Good APIsA suite of APIs published by the OIT Integrations Team providing access to frequently used and requested Un...19.2 Miter REST APIMiter exposes a REST API used to build custom integrations between the Miter HCM platform and construction ...18.8 Heartland Payroll APIHeartland's Payroll APIs support employee payroll processing, tax filings, and HR integrations for small to...12.2

Score breakdown

Frequency

63.5

log-scaled weighted occurrences

Breadth

3.8

spread across providers

Quality lift

38.7

mean composite of providers using it

Cohesion

27.3

strength of nearest seed neighbor

Where this tag comes from

Provider tag118

Api tag77

Openapi tag18

Openapi op tag24

Cohort brief

Auto-generated

The 137 providers in the APIs.io catalog tagged HR, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.

Providers

137

all scored

Mean Kin Score

31.8

+11.1 vs catalog 20.7

Mean Agent Readiness

17.4

+7.7 vs catalog 9.7

Spread

5–69.9

median 32.4 · σ 14.3

How the 137 split by band

Exemplar 1Strong 4Developing 41Thin 42Emerging 37Minimal 12

Facet averages, against the whole catalog

Facet	This cohort	Catalog	Difference	Scored
Contract Quality	37.5	17.5	+20	137
Access Clarity	35.5	22.3	+13.2	137
Operational Transparency	19.3	11.3	+8	137
Discoverability	68.1	60.4	+7.7	137
Developer Ergonomics	24.8	17.9	+6.9	137
Contract Governance	8.3	6.4	+1.9	137

A facet is averaged over the members that carry it, not over the whole cohort — the “Scored” column is that count. Averaging an absent facet as zero would score our own coverage gaps as the providers’ posture.

What this cohort publishes

Artifact	This cohort	Catalog	Difference
MCP server (any)	19%	16%	+3
MCP server (first-party)	5%	7%	-2
Agent Skills	0%	0%	0
OAuth scopes	21%	9%	+12
Security	98%	88%	+10
Arazzo workflows	3%	2%	+1
Governance rules	27%	13%	+14

mcp_pct counts any mcp/ artifact including ones API Evangelist derived from the provider OpenAPI; mcp_first_party_pct counts only servers the provider publishes. Prefer the latter.

Top by Kin Score

1 Remote 69.9
2 Microsoft LinkedIn 63.3
3 Intuit 59.2
4 Deel 55
5 Thatch Health 54.9
6 Justworks 53.4
7 Factorial 52.8
8 HR Partner 51.7
9 Absentify 51.2
10 KolayIK 50.4

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HR

Providers using this tag (137)

APIs with this tag (77)