Check Technologies

Check Technologies (Check) is a Stripe-incubated embedded-payroll infrastructure company whose API lets vertical SaaS, HR, and time-tracking platforms embed full-service payroll directly into their own products. The Check API handles the hard parts of running payroll — worker onboarding, pay schedules, earnings and deductions, tax calculation, filing and remittance across federal, state, and local jurisdictions, contractor payments, and money movement — behind a white-labeled, developer-first surface. Platforms integrate through the REST API, embeddable white-labeled React Components (Company Onboard, Run Payroll, W-4 / tax setup, bank connection via Plaid, filing authorization), webhooks, a Model Context Protocol server for AI agents, and a Python CLI. Check is backed by Stripe, Index Ventures, Thrive Capital, Bedrock Capital, and Battery Ventures, and powers payroll for platforms including Homebase.

Check Technologies publishes 1 API on the APIs.io network. Tagged areas include Company, Payroll, Embedded Finance, Fintech, and Payments.

The Check Technologies catalog on APIs.io includes 1 event-driven AsyncAPI specification.

Check Technologies’ developer surface includes documentation, API reference, getting-started guide, authentication, support, engineering blog, signup flow, and 22 more developer resources.

🌐 Visit website 📡 Source on GitHub

49.0/100 developing ▬ flat Agent 35/100 agent ready saas Full breakdown ↓
scored 2026-08-30 · rubric v0.17.2

AccessSelf serve

1 APIs 1 MCP Servers

Company Payroll Embedded Finance Fintech Payments Human Resources Tax Compliance Developer Tools

Kin Score

Kin Score How this is scored →
scored 2026-08-30 · rubric v0.17.2

Composite quality — 49.0/100 · developing

Contract Quality 9.1 / 21

Developer Ergonomics 8.5 / 17

Access Clarity 6.0 / 17

Operational Transparency 6.7 / 11

Contract Governance 1.9 / 10

Discoverability 6.5 / 9

Regulatory Posture 8.4 / 15

Agent readiness — 35/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 9 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 6 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Surface 0 / 5

Regulatory Posture applies to this provider. Its tags matched the Payments regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/check-technologies: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 1

Individual APIs this provider publishes, each with its own machine-readable definition.

Check Payroll API

Check's REST API for embedding full-service payroll — companies, employees, contractors, pay schedules, payrolls, payments, tax filings, documents, bank accounts, and webhooks —...

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

Get Started 4

Portal, sign-up, and the first successful call

DeveloperPortal

GettingStarted

SignUp

Sandbox

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

MCPServer

MCPServer

LLMsTxt

LLMsTxt

Design & Contract 7

Pagination, idempotency, versioning, errors, and events

Conformance

Lifecycle

Webhooks

Components

Conventions

Idempotency

ErrorCatalog

Scroll for all 7

Build 2

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

CLI

CLI

Access & Security 5

Authentication, authorization, and security posture

DomainSecurity

Authentication

Security

Compliance

VulnerabilityDisclosure

VulnerabilityDisclosure

Operate 4

Status, limits, changes, and where to get help

Support

StatusPage

ChangeLog

Deprecation

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 1

The organization behind the API

Blog

Blog

Source (apis.yml)

aid: check-technologies
name: Check Technologies
description: Check Technologies (Check) is a Stripe-incubated embedded-payroll infrastructure company whose API lets vertical
  SaaS, HR, and time-tracking platforms embed full-service payroll directly into their own products. The Check API handles
  the hard parts of running payroll — worker onboarding, pay schedules, earnings and deductions, tax calculation, filing and
  remittance across federal, state, and local jurisdictions, contractor payments, and money movement — behind a white-labeled,
  developer-first surface. Platforms integrate through the REST API, embeddable white-labeled React Components (Company Onboard,
  Run Payroll, W-4 / tax setup, bank connection via Plaid, filing authorization), webhooks, a Model Context Protocol server
  for AI agents, and a Python CLI. Check is backed by Stripe, Index Ventures, Thrive Capital, Bedrock Capital, and Battery
  Ventures, and powers payroll for platforms including Homebase.
url: https://raw.githubusercontent.com/api-evangelist/check-technologies/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- battery-ventures
x-tier: stub
x-tier-reason: portfolio-lead
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Self-serve signup
  confidence: medium
  source:
  - authentication
  generated: '2026-07-22'
  method: derived
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-18'
tags:
- Company
- Payroll
- Embedded Finance
- Fintech
- Payments
- Human Resources
- Tax
- Compliance
- Developer Tools
tags_raw:
- Company
- Payroll
- Embedded Finance
- Fintech
- Payments
- Human Resources
- Tax
- Compliance
- Developer Tools
- API
image: https://cdn.prod.website-files.com/671a2c705660d0119de1cc9f/671ac14172962caffbc11039_OG-IMAGE-1.png
apis:
- name: Check Payroll API
  description: Check's REST API for embedding full-service payroll — companies, employees, contractors, pay schedules, payrolls,
    payments, tax filings, documents, bank accounts, and webhooks — into a platform product.
  humanURL: https://docs.checkhq.com/reference
  baseURL: https://api.checkhq.com
  tags:
  - Payroll
  - Payments
  - Tax
  - HR
  properties:
  - type: Documentation
    url: https://docs.checkhq.com/docs/overview
  - type: APIReference
    url: https://docs.checkhq.com/reference
  - type: Webhooks
    url: https://docs.checkhq.com/docs/webhooks-1
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: DomainSecurity
  url: security/check-technologies-domain-security.yml
- type: DeveloperPortal
  url: https://docs.checkhq.com/
- type: Documentation
  url: https://docs.checkhq.com/docs/overview
- type: APIReference
  url: https://docs.checkhq.com/reference
- type: GettingStarted
  url: https://docs.checkhq.com/docs/quickstart
- type: Authentication
  url: authentication/check-technologies-authentication.yml
- type: Support
  url: https://docs.checkhq.com/
- type: Blog
  url: https://www.checkhq.com/resources/blog
- type: GitHubOrganization
  url: https://github.com/check-technologies
- type: SignUp
  url: https://sandbox.checkhq.com/
- type: TermsOfService
  url: https://www.checkhq.com/company/terms
- type: PrivacyPolicy
  url: https://www.checkhq.com/company/privacy
- type: Security
  url: https://www.checkhq.com/company/security
- type: Compliance
  url: https://www.checkhq.com/company/security
- type: Conformance
  url: conformance/check-technologies-conformance.yml
- type: VulnerabilityDisclosure
  url: security/check-technologies-vulnerability-disclosure.yml
- type: StatusPage
  url: https://status.checkhq.com
- type: ChangeLog
  url: changelog/check-technologies-changelog.yml
- type: Deprecation
  url: lifecycle/check-technologies-lifecycle.yml
- type: Lifecycle
  url: lifecycle/check-technologies-lifecycle.yml
- type: Webhooks
  url: asyncapi/check-technologies-webhooks.yml
- type: MCPServer
  url: mcp/check-technologies-mcp.yml
- type: CLI
  url: cli/check-technologies-cli.yml
- type: Components
  url: components/check-technologies-components.yml
- type: Sandbox
  url: sandbox/check-technologies-sandbox.yml
- type: Conventions
  url: conventions/check-technologies-conventions.yml
- type: Idempotency
  url: conventions/check-technologies-conventions.yml
- type: ErrorCatalog
  url: errors/check-technologies-error-codes.yml
- type: LLMsTxt
  url: llms/check-technologies-llms.txt
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence

Work with this as data

Every provider here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for providers

9 MCP tools reach this

find_providersBrowse and filter every provider in the catalog.
get_provider_artifactsEvery artifact this provider publishes, grouped by type.
get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

All 92 tools →

Call it yourself

curl for this page

This provider

curl "https://apis.io/api/v1/providers/check-technologies"

All providers

curl "https://apis.io/api/v1/providers?limit=25"

Every operation they expose

curl "https://apis.io/api/v1/providers/check-technologies/operations?limit=25"

How their score was established

curl "https://apis.io/api/v1/providers/check-technologies/evidence"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no email required.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.