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 →

Exemplar 1 Complete, well-documented, and agent-ready

Plaid Income APIPlaid's Income is part of the Plaid open-finance platform, exposing 6 documented endpoint(s) under the Plai...68.2

Strong 3 Solid coverage with minor gaps

Oracle E-Business Suite Payroll APIPayroll processing and run results61.4 Mindbody Payroll APIPayroll operations.60.8 QuickBooks Payroll and Time APIThe QuickBooks Payroll and Time API provides programmatic access to payroll and time-tracking data within Q...59.2

Developing 28 Usable, with meaningful gaps to close

ServiceTitan Payroll APIManage payroll adjustments, gross-pay items, job splits, timesheet codes, activity codes, non-job timesheet...53.5 ServiceTitan Timesheets APIRead and write timesheet entries, activity codes, and shift segments tying technician time to jobs, non-job...53.5 Justworks Deductions APIManage employee deductions — list deduction types, create one-time and recurring deductions, update existin...53.4 Oracle Fusion Cloud HCM REST APIREST APIs for viewing and managing human capital management data including workers, talent management, payr...53.0 Factorial Payroll APIPayroll supplements, payroll identifiers, family situations, and bookkeeper resources. Backs Factorial's in...52.8 PlanSource Payroll APIPayroll coverages data.52.1 bexio Payroll APIThe Payroll API from bexio — 2 operation(s) for payroll.51.3 KolayIK Payroll APIThe Payroll API from KolayIK — 2 operation(s) for payroll.50.4 PeopleSoft Global Payroll APIREST API endpoints for the Global Payroll skill, providing access to payroll data, product profile informat...49.4 PeopleSoft Payroll APIPayroll operations49.4 PeopleSoft Payroll for North America APIDelivered REST API endpoints for retrieving paycheck header details, earnings, deductions, taxes, direct de...49.4 Check Payroll APICheck's REST API for embedding full-service payroll — companies, employees, contractors, pay schedules, pay...49.0 Deskera People APIAPI for Deskera People, the HR, payroll and employee-self-service product — employees, teams, shifts, atten...49.0 Puzzle Payroll APIThe Payroll API from Puzzle — 6 operation(s) for payroll.48.4 Optibus Payroll APIThe Payroll API from Optibus — 1 operation(s) for payroll.48.2 Workday Integration Payroll APIThe Payroll API from Workday Integration — 1 operation(s) for payroll.46.8 HMRC PAYE (Pay As You Earn) APIThe HMRC PAYE APIs enable payroll software to submit employer payroll data, retrieve tax codes and employee...46.5 Workday Studio Payroll APIWeb service operations for payroll processing, tax management, compensation calculations, and pay component...46.3 Leapsome payroll APIThe payroll API from Leapsome — 2 operation(s) for payroll.46.0 Codat Sync for Payroll APIThe Codat Sync for Payroll API enables HR, payroll, and vertical SaaS platforms to integrate their customer...45.6 Request Finance AP and AR APIThe Accounts Payable and Receivable REST API for issuing invoices, accepting crypto and fiat payments, runn...45.6 Oracle Fusion Cloud Applications Payroll APIPayroll processing and results45.3 FDX Payroll APIRESTful endpoints introduced in FDX API v6.0 for retrieving permissioned payroll data including employment ...43.6 Dynamics 365 Human Resources APIAPI for managing human resources operations including employee data, payroll integration, applicant trackin...43.0 Pinwheel Accounts APIThe Pinwheel Accounts API exposes the linked payroll accounts a user has connected through Pinwheel Link, s...40.4 Pinwheel Deposit Switch APIThe Pinwheel Deposit Switch API automates moving a customer's direct deposit allocations from one financial...40.4 Pinwheel Taxes APIThe Pinwheel Taxes API retrieves W-2, 1099-K, 1099-MISC, and 1099-NEC documents directly from a worker's pa...40.4 Workday Integrations Payroll APIAccess payroll data and pay group configurations40.3

Thin 33 Limited public surface area

TIAA Payroll360 APITIAA Payroll360 enables direct API connections between HR and payroll systems and TIAA's plan administratio...38.8 Gusto Embedded Payroll APIThe Gusto Embedded Payroll API enables platforms to build and embed modern payroll, benefits, and HR toolin...37.7 freee Payroll APIEmployee payroll statements (給与明細) and bonuses.36.8 Keka HR Payroll APIThe Payroll API from Keka HR — 11 operation(s) for payroll.36.8 Rippling Payroll APIPush earnings, deductions, and reimbursements into Rippling Payroll for off-cycle and on-cycle pay runs, an...35.6 NOWPayments Mass Payouts APIBulk cryptocurrency payout API enabling merchants to initiate thousands of transactions to different addres...35.5 Planday APIPlanday's REST API secured by OAuth2 bearer tokens, separated into domains (HR, Absence, Pay, Payroll, Port...34.9 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 Oyster HR APIREST API for global employment operations including hiring, payroll, benefits, time off, expenses, invoicin...32.0 UKG Payroll APIPayroll data and check history31.9 ADP Embedded Payroll APIThe ADP Embedded Payroll API enables ISVs and platforms to embed ADP payroll capabilities directly into the...31.3 W-2 and 1099 Reporting TemplatesTemplates and schemas for generating IRS W-2 (wages and tax statements) and 1099 (miscellaneous income) for...30.5 Nmbrs SOAP CompanyService (Legacy)Legacy SOAP v3 CompanyService (120+ operations, e.g. Company_GetCurrentPeriod, Run_GetList, RunRequest_Inse...30.3 QuickBooks Payroll APIREST API for managing payroll, employees, paychecks, and payroll tax information within QuickBooks Online P...30.3 Multiplier Contracts APIEmployment and contractor agreement data - contract generation, terms, and lifecycle status - made availabl...29.6 Multiplier Invoices APIConsolidated invoice and billing data for employment, payroll, and contractor services. Available to integr...29.6 Multiplier Members APIToken-authenticated synchronization of Multiplier members - employees and contractors - and their profile, ...29.6 Multiplier Payments APIPayment and disbursement data for members and contractors. Available to integrations under account-provisio...29.6 Multiplier Payroll APIMulti-country payroll data sync - salary, compensation changes, and payroll runs across 120+ currencies. Su...29.6 Multiplier Time Off APILeave requests, balances, and regional holiday data with per-country leave policy rules, plus timesheets. M...29.6 G-P EOR APIProvides capabilities for accessing and managing employee and employment data within the G-P Employer of Re...29.5 Homebase APIThe Homebase REST API provides programmatic access to employee scheduling, time tracking, payroll synchroni...29.2 UKG Ready REST APIRESTful API for UKG Ready providing programmatic access to employees, HR records, payroll, time and attenda...29.1 Paylocity Integrations REST APIREST API for managing employees, demographics, status, pay rates, direct deposit, deductions, earnings, tax...28.2 Paylocity Payroll APIThe Payroll API from Paylocity — 3 operation(s) for payroll.28.2 Velocity Global APIREST API for managing global employment operations including international hiring, employee records, payrol...28.1 PayFit Customer APIPrivate REST API for PayFit customers to access their own company data via long-lived private API keys, sui...27.4 PayFit Partner APIOAuth 2.0 REST API for solution developers building integrations with PayFit. Once enabled by a customer, p...27.4 Employee Navigator Partner APIThe Employee Navigator partner REST API program — the Company Integration API and the Company Benefit Detai...27.2 MYOB Business APIREST-based cloud API for MYOB AccountRight, MYOB Essentials, and MYOB Business. Provides endpoints for mana...27.0 Payactiv Access-as-a-Service APIAccess-as-a-Service is Payactiv's API-driven infrastructure for embedding Earned Wage Access, debit and pay...26.5 Perpay Payroll Direct-Deposit APIREST integration layer built on Pinwheel's payroll connectivity API. Supports direct-deposit switching, inc...26.3

Emerging 22 Early or largely undocumented

ADP Payroll APIThe ADP Payroll API provides programmatic access to payroll processing capabilities including earnings, ded...25.4 UKG Pro HCM APIREST API for the UKG Pro HCM suite covering people, benefits, payroll, talent, recruiting, onboarding, and ...24.6 Paychex Developer APIsThe Paychex Developer Program offers a library of APIs to automate, standardize, and simplify integrations ...21.3 ADP Workforce Now HCM APIHCM v2 REST API for accessing worker demographics, payroll, time and attendance, benefits, talent, and orga...21.0 Darwinbox APIREST API for Darwinbox HRMS covering employee management, attendance, recruitment, organizational managemen...19.9 Unit4 ERPx REST APIComprehensive REST API for Unit4 ERPx cloud ERP platform covering time and expenses, personnel, payroll, pr...19.9 Playroll Global Payroll APIRun and consolidate global payroll across entities and countries, with statutory calculations and local pay...19.5 TranZak Bulk Payments APIREST API for sending bulk payments to up to 2,000 recipients in a single request. Supports file-based uploa...19.4 Miter REST APIMiter exposes a REST API used to build custom integrations between the Miter HCM platform and construction ...18.8 TriNet Zenefits REST APIREST API providing programmatic access to people, companies, locations, employments, compensation, time-off...17.4 ADPADP is the largest payroll and HCM provider with the ADP Marketplace and ADP Workforce Now / Run / Vantage ...16.4 FinchFinch is a unified API for employment systems (HRIS and payroll) covering employee, company, payment, pay-s...16.4 GustoGusto is a payroll, benefits, and HR platform for small business with a partner REST API for embedded payro...16.4 JustworksJustworks is a PEO platform providing payroll, benefits, and compliance with an HRIS API for partners and i...16.4 PaylocityPaylocity is a cloud payroll and HCM provider with a REST Web Services API for employees, payroll, benefits...16.4 RipplingRippling is a workforce platform unifying HR, IT, and Finance with a public REST API covering employees, pa...16.4 TriNet Payroll APIThe TriNet Payroll API provides access to employee payroll and compensation data including pay rates, pay f...16.4 UKG (Ultimate Kronos Group)UKG provides UKG Pro and UKG Ready HCM, workforce management, and payroll with a REST API and integration m...16.4 WorkdayWorkday is a cloud HCM, payroll, and finance suite with a Web Services / REST API catalog spanning Human Ca...16.4 Check Payroll APIThe Check Payroll API is a comprehensive REST API for embedding end-to-end U.S. payroll inside another plat...13.6 Heartland Payroll APIHeartland's Payroll APIs support employee payroll processing, tax filings, and HR integrations for small to...12.2 Paycor Public API v1REST API for accessing Paycor employees, payroll, benefits, time, and organizational data. Uses OAuth 2.0 a...11.9

Score breakdown

Frequency

67.4

log-scaled weighted occurrences

Breadth

5.6

spread across providers

Quality lift

36.5

mean composite of providers using it

Cohesion

27.3

strength of nearest seed neighbor

Where this tag comes from

Provider tag182

Api tag82

Openapi tag22

Openapi op tag39

Cohort brief

Auto-generated

The 203 providers in the APIs.io catalog tagged Payroll, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.

Providers

203

all scored

Mean Kin Score

+9.3 vs catalog 20.7

Mean Agent Readiness

15.4

+5.7 vs catalog 9.7

Spread

1.5–68.2

median 29.7 · σ 16.3

How the 203 split by band

Exemplar 1Strong 13Developing 51Thin 51Emerging 59Minimal 28

Facet averages, against the whole catalog

Facet	This cohort	Catalog	Difference	Scored
Access Clarity	34.5	22.3	+12.2	203
Contract Quality	29.1	17.5	+11.6	203
Developer Ergonomics	27.1	17.9	+9.2	203
Operational Transparency	18.7	11.3	+7.4	203
Discoverability	67.5	60.4	+7.1	203
Contract Governance	8.9	6.4	+2.5	203

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)	24%	16%	+8
MCP server (first-party)	4%	7%	-3
Agent Skills	0%	0%	0
OAuth scopes	24%	9%	+15
Security	97%	88%	+9
Arazzo workflows	4%	2%	+2
Governance rules	19%	13%	+6

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 Plaid 68.2
2 Argyle 62.8
3 Oracle E-Business Suite 61.4
4 Kota 61.2
5 Mindbody 60.8
6 DailyPay 60.6
7 Intuit 59.2
8 Wingspan 58.9
9 KUFU 58.2
10 Niural 57.5

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Payroll

Providers using this tag (203)

APIs with this tag (87)