Gusto

A cloud-based payroll, benefits, and human resources platform designed for small and medium-sized businesses. Gusto Embedded enables platforms to integrate payroll, tax filing, and HR workflows directly into their products via a REST API, React SDK, and webhooks.

Gusto publishes 12 API contracts indexed on the APIs.io network, including Embedded Payroll API, Companies API, Contractors API, and 9 more. Tagged areas include Human Resources, Payroll, Benefits, Enterprise Software, and Embedded Finance.

Gusto’s developer surface includes authentication, documentation, support, engineering blog, and 22 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

36.0/100 thin ▬ flat Agent 30/100 agent ready open core · Apache-2.0 Full breakdown ↓
scored 2026-10-17 · rubric v0.24.0

1 published contract 1 MCP Servers

Human Resources Payroll Benefits Enterprise Software Embedded Finance Employee Benefits

What this lets a business do 1

Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →

Human Capital Management

BC-300

ContractorsPay SchedulesPayrolls

PUT /v1/companies/{company_id}/payrolls/{payroll_id}/submit GET /v1/companies/{company_id}/pay_schedules GET /v1/companies/{company_uuid}/contractors

Kin Score

Kin Score How this is scored →
scored 2026-10-17 · rubric v0.24.0

Composite quality — 36.0/100 · thin

Contract Quality 9.0 / 16

Developer Ergonomics 4.5 / 13

Access Clarity 4.6 / 13

Operational Transparency 0.8 / 8

Contract Governance 0.0 / 8

Discoverability 4.6 / 7

Regulatory Posture 4.6 / 15

Open Source Surface 2.5 / 10

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 30/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 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 Well-Known Document 0 / 5

Regulatory Posture applies to this provider. Its tags matched the Employment & Payroll 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.

Open Source Surface applies to this provider. This product is open source and we read its repository directly, so Open Source Surface carries 10 points of the composite. It is scored from what the repository actually publishes — a security policy, a contribution guide, a release history, a code of conduct — read live from the provider rather than inferred from our own catalog pointers. This facet adds; nothing was taken away to make room for it. An open-source project is not excused from the commercial facets, because exemption would strip it of the points it does earn. If we have the wrong repository, or this product is not open source, say so on your provider repo and we will drop the facet rather than have you publish against it.

Create-or-Update Ergonomics applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

The six quality facets above are damped to 65 points between them, because both conditional facets apply and carry 35 points together. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 65% 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/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/gusto: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
HR and Payroll	builds-on	53.2	-	-

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

APIs 12

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

Gusto Embedded Payroll API

The Gusto Embedded Payroll API enables platforms to build and embed modern payroll, benefits, and HR tooling into their own products. The API exposes endpoints for company onboa...

Gusto Embedded React SDK

The Gusto Embedded React SDK provides pre-built UI flows and components that platforms can drop into their own React applications to surface Gusto Embedded Payroll experiences (...

Gusto Companies API

The Companies API from Gusto — 4 operation(s) for companies.

Gusto Contractors API

The Contractors API from Gusto — 2 operation(s) for contractors.

Gusto Employees API

The Employees API from Gusto — 1 operation(s) for employees.

Gusto Flows API

The Flows API from Gusto — 1 operation(s) for flows.

Gusto Payrolls API

The Payrolls API from Gusto — 3 operation(s) for payrolls.

Gusto Reports API

The Reports API from Gusto — 2 operation(s) for reports.

Gusto Webhooks API

The Webhooks API from Gusto — 1 operation(s) for webhooks.

Gusto Bank Accounts API

The Bank Accounts API from Gusto — 3 operation(s) for bank accounts.

Gusto Contractor Payments API

The Contractor Payments API from Gusto — 2 operation(s) for contractor payments.

Gusto Pay Schedules API

The Pay Schedules API from Gusto — 2 operation(s) for pay schedules.

Scroll for all 12

Open Collections 13

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

API Collection

OPEN COLLECTION

Gusto Embedded Payroll Webhooks

OPEN COLLECTION

Gusto Embedded Payroll BankAccounts API

OPEN COLLECTION

Gusto Embedded Payroll BankAccounts Companies API

OPEN COLLECTION

Gusto Embedded Payroll BankAccounts ContractorPayments API

OPEN COLLECTION

Gusto Embedded Payroll BankAccounts Contractors API

OPEN COLLECTION

Gusto Embedded Payroll BankAccounts Employees API

OPEN COLLECTION

Gusto Embedded Payroll BankAccounts Flows API

OPEN COLLECTION

Gusto Embedded Payroll BankAccounts Payrolls API

OPEN COLLECTION

Gusto Embedded Payroll BankAccounts PaySchedules API

OPEN COLLECTION

Gusto Embedded Payroll BankAccounts Reports API

OPEN COLLECTION

Gusto Embedded Payroll BankAccounts Webhooks API

OPEN COLLECTION

Gusto Embedded Payroll API

OPEN COLLECTION

Scroll for all 13

MCP Servers 1

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

Gusto MCP Server

Remote MCP server at mcp.api.gusto.com over HTTP.

MCP SERVER

Security Posture 4

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Gusto Authentication

http · 1 scheme

SECURITY

Gusto Domain Security

TLSv1.3 · DMARC

SECURITY

Gusto Vulnerability Disclosure

Bugcrowd

SECURITY

Gusto Trust Center

SOC 2, HIPAA

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Gusto Agentic Access

25 operations · 17 acting · 1 human-in-the-loop

25 operations · 17 acting

AGENTIC

Resources

Get Started 3

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

SignupURL

SignupURL

Login

Documentation 2

Reference material describing how the API behaves

ContributionGuide

ContributionGuide

Documentation

Documentation

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

LlmsText

LlmsText

Build 6

SDKs, sample code, and the tooling you integrate with

SourceCode

SDKs

SDKs

SDKs

SDKs

SDKs

Access & Security 4

Authentication, authorization, and security posture

TrustCenter

TrustCenter

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 2

Status, limits, changes, and where to get help

IssueTracker

IssueTracker

Support

Support

Commercial 3

Pricing, plans, and the legal terms of use

License

License

PrivacyPolicy

PrivacyPolicy

TermsOfService

TermsOfService

Company 3

The organization behind the API

LinkedIn

Website

Website

Blog

Blog

Other 1

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

Source (apis.yml)

aid: gusto
url: https://raw.githubusercontent.com/api-evangelist/gusto/refs/heads/main/apis.yml
name: Gusto
type: Index
deliveryModel:
  model: open-core
  license: Apache-2.0
  open_source: true
  commercial: true
  callable_host: true
  label: Open core · an OSS project plus a commercial hosted product
  confidence: high
  source:
  - license
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - security
  generated: '2026-09-03'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/gusto.png
x-docs-platform: readme
x-docs-platform-confidence: high
x-docs-platform-checked: 2026-10-03
tags:
- Human Resources
- Payroll
- Benefits
- Enterprise Software
- Embedded Finance
- Employee Benefits
description: A cloud-based payroll, benefits, and human resources platform designed for small and medium-sized businesses.
  Gusto Embedded enables platforms to integrate payroll, tax filing, and HR workflows directly into their products via a REST
  API, React SDK, and webhooks.
created: '2026-05-05'
modified: '2026-05-30'
specificationVersion: '0.23'
apis:
- aid: gusto:embedded-payroll-api
  name: Gusto Embedded Payroll API
  tags:
  - Payroll
  - Employees
  - Contractors
  - Companies
  - Onboarding
  - Tax Filing
  - Benefits
  - ACH
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://docs.gusto.com/embedded-payroll
  baseURL: https://api.gusto.com
  description: The Gusto Embedded Payroll API enables platforms to build and embed modern payroll, benefits, and HR tooling
    into their own products. The API exposes endpoints for company onboarding, employee and contractor management, payroll
    runs, tax filings, benefits administration, ACH transactions, and compliance reporting. Authentication uses OAuth 2.0;
    partners must complete commercial, security, and implementation reviews with Gusto's partnerships team before moving from
    the demo environment to production.
  properties:
  - type: Documentation
    url: https://docs.gusto.com/embedded-payroll
  - type: SignupURL
    url: https://gusto.com/embedded-payroll
  - type: Webhooks
    url: https://docs.gusto.com/embedded-payroll/docs/webhooks
  - type: AsyncAPI
    url: https://raw.githubusercontent.com/api-evangelist/gusto/refs/heads/main/openapi/gusto-asyncapi.yml
  - type: Authentication
    url: https://docs.gusto.com/embedded-payroll/docs/authentication
- aid: gusto:embedded-react-sdk
  name: Gusto Embedded React SDK
  tags:
  - SDK
  - React
  - TypeScript
  - UI Components
  - Embedded
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://github.com/Gusto/embedded-react-sdk
  baseURL: https://api.gusto.com
  description: The Gusto Embedded React SDK provides pre-built UI flows and components that platforms can drop into their
    own React applications to surface Gusto Embedded Payroll experiences (company onboarding, employee onboarding, payroll
    runs, document signing) without building custom UI against the underlying API.
  properties:
  - type: SourceCode
    url: https://github.com/Gusto/embedded-react-sdk
  - type: SDKs
    url: https://www.npmjs.com/package/@gusto/embedded-react-sdk
  - type: Documentation
    url: https://docs.gusto.com/embedded-payroll/docs/react-sdk
- aid: gusto:gusto-companies-api
  name: Gusto Companies API
  description: The Companies API from Gusto — 4 operation(s) for companies.
  humanURL: https://docs.gusto.com/embedded-payroll
  baseURL: https://api.gusto.com
  tags:
  - Companies
  properties:
  - type: OpenAPI
    url: openapi/gusto-companies-api-openapi.yml
- aid: gusto:gusto-contractors-api
  name: Gusto Contractors API
  description: The Contractors API from Gusto — 2 operation(s) for contractors.
  humanURL: https://docs.gusto.com/embedded-payroll
  baseURL: https://api.gusto.com
  tags:
  - Contractors
  properties:
  - type: OpenAPI
    url: openapi/gusto-contractors-api-openapi.yml
- aid: gusto:gusto-employees-api
  name: Gusto Employees API
  description: The Employees API from Gusto — 1 operation(s) for employees.
  humanURL: https://docs.gusto.com/embedded-payroll
  baseURL: https://api.gusto.com
  tags:
  - Employees
  properties:
  - type: OpenAPI
    url: openapi/gusto-employees-api-openapi.yml
- aid: gusto:gusto-flows-api
  name: Gusto Flows API
  description: The Flows API from Gusto — 1 operation(s) for flows.
  humanURL: https://docs.gusto.com/embedded-payroll
  baseURL: https://api.gusto.com
  tags:
  - Flow
  tags_raw:
  - Flows
  properties:
  - type: OpenAPI
    url: openapi/gusto-flows-api-openapi.yml
- aid: gusto:gusto-payrolls-api
  name: Gusto Payrolls API
  description: The Payrolls API from Gusto — 3 operation(s) for payrolls.
  humanURL: https://docs.gusto.com/embedded-payroll
  baseURL: https://api.gusto.com
  tags:
  - Payrolls
  properties:
  - type: OpenAPI
    url: openapi/gusto-payrolls-api-openapi.yml
- aid: gusto:gusto-reports-api
  name: Gusto Reports API
  description: The Reports API from Gusto — 2 operation(s) for reports.
  humanURL: https://docs.gusto.com/embedded-payroll
  baseURL: https://api.gusto.com
  tags:
  - Reports
  properties:
  - type: OpenAPI
    url: openapi/gusto-reports-api-openapi.yml
- aid: gusto:gusto-webhooks-api
  name: Gusto Webhooks API
  description: The Webhooks API from Gusto — 1 operation(s) for webhooks.
  humanURL: https://docs.gusto.com/embedded-payroll
  baseURL: https://api.gusto.com
  tags:
  - Webhook
  tags_raw:
  - Webhooks
  properties:
  - type: OpenAPI
    url: openapi/gusto-webhooks-api-openapi.yml
- aid: gusto:gusto-bank-accounts-api
  name: Gusto Bank Accounts API
  description: The Bank Accounts API from Gusto — 3 operation(s) for bank accounts.
  humanURL: https://docs.gusto.com/embedded-payroll
  baseURL: https://api.gusto.com
  tags:
  - Bank Accounts
  properties:
  - type: OpenAPI
    url: openapi/gusto-bank-accounts-api-openapi.yml
- aid: gusto:gusto-contractor-payments-api
  name: Gusto Contractor Payments API
  description: The Contractor Payments API from Gusto — 2 operation(s) for contractor payments.
  humanURL: https://docs.gusto.com/embedded-payroll
  baseURL: https://api.gusto.com
  tags:
  - Contractor Payments
  properties:
  - type: OpenAPI
    url: openapi/gusto-contractor-payments-api-openapi.yml
- aid: gusto:gusto-pay-schedules-api
  name: Gusto Pay Schedules API
  description: The Pay Schedules API from Gusto — 2 operation(s) for pay schedules.
  humanURL: https://docs.gusto.com/embedded-payroll
  baseURL: https://api.gusto.com
  tags:
  - Pay Schedules
  properties:
  - type: OpenAPI
    url: openapi/gusto-pay-schedules-api-openapi.yml
common:
- type: CapabilityMap
  url: capabilities/gusto-capability-edges.yml
  name: Gusto Business Capability Map
- type: IssueTracker
  url: https://github.com/Gusto/embedded-react-sdk/issues
- type: ContributionGuide
  url: https://github.com/Gusto/embedded-react-sdk/blob/main/CONTRIBUTING.md
- type: License
  name: Apache-2.0
  url: https://github.com/Gusto/embedded-react-sdk/blob/main/LICENSE
- type: AgenticAccess
  url: agentic-access/gusto-agentic-access.yml
- type: TrustCenter
  url: security/gusto-trust-center.yml
- type: VulnerabilityDisclosure
  url: security/gusto-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/gusto-domain-security.yml
- type: Authentication
  url: authentication/gusto-authentication.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/gustohq
- type: Website
  url: https://gusto.com/
- type: DeveloperPortal
  url: https://docs.gusto.com/embedded-payroll
- type: Documentation
  url: https://docs.gusto.com/embedded-payroll
- type: SignupURL
  url: https://gusto.com/embedded-payroll
- type: SourceCode
  url: https://github.com/Gusto
- type: SDKs
  url: https://github.com/Gusto/gusto-python-client
- type: SDKs
  url: https://github.com/Gusto/gusto-typescript-client
- type: SDKs
  url: https://github.com/Gusto/gusto-ruby-client
- type: SDKs
  url: https://github.com/Gusto/gusto-java-client
- type: SDKs
  url: https://github.com/Gusto/gusto-csharp-client
- type: PrivacyPolicy
  url: https://gusto.com/about/privacy
- type: TermsOfService
  url: https://gusto.com/about/terms
- type: Support
  url: https://support.gusto.com/
- type: Blog
  url: https://gusto.com/blog
- type: Login
  url: https://app.gusto.com/login
- type: LlmsText
  url: https://docs.gusto.com/llms.txt

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