Gusto website screenshot

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 11 APIs on the APIs.io network, including Embedded Payroll API, BankAccounts API, Companies API, and 8 more. Tagged areas include Human Resources, Payroll, Benefits, Enterprise Software, and Embedded Finance.

Gusto’s developer surface includes authentication, documentation, support, engineering blog, and 21 more developer resources.

🌐 Visit website 📡 Source on GitHub
35.8/100 thin ▬ flat Agent 22/100 agent aware open core · Apache-2.0 Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0
1 APIs
Human ResourcesPayrollBenefitsEnterprise SoftwareEmbedded Finance

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0
Composite quality — 35.8/100 · thin
Contract Quality 12.4 / 20
Developer Ergonomics 5.5 / 16
Access Clarity 5.7 / 16
Operational Transparency 1.0 / 10
Contract Governance 0.0 / 10
Discoverability 5.6 / 8
Open Source Surface 2.5 / 10
Create-or-Update Ergonomics 0.0 / 10
Agent readiness — 22/100 · agent aware
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
Documented Reversibility 0 / 6
MCP Server 0 / 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
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 80 points between them, because the conditional facet above carries the other 20. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 80% 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 →

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 BankAccounts API

The BankAccounts API from Gusto — 3 operation(s) for bankaccounts.

Gusto Companies API

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

Gusto ContractorPayments API

The ContractorPayments API from Gusto — 2 operation(s) for contractorpayments.

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 PaySchedules API

The PaySchedules API from Gusto — 2 operation(s) for payschedules.

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.

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

GraphQL 1

GraphQL schemas published by this provider.

Gusto GraphQL Schema

This document describes the conceptual GraphQL schema for the Gusto Embedded Payroll API. Gusto provides a REST API; this schema represents the domain model as a GraphQL type sy...

GRAPHQL

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
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
SourceCode
 SDKs
SDKs
 SDKs
SDKs
 SDKs
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
LinkedIn
 Website
Website
 Blog
Blog

Source (apis.yml)

apis.yml Raw ↑ 
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
tags:
- Human Resources
- Payroll
- Benefits
- Enterprise Software
- Embedded Finance
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
  - url: graphql/gusto-graphql.md
    type: GraphQL
- 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-bankaccounts-api
  name: Gusto BankAccounts API
  description: The BankAccounts API from Gusto — 3 operation(s) for bankaccounts.
  humanURL: https://docs.gusto.com/embedded-payroll
  baseURL: https://api.gusto.com
  tags:
  - Bank Accounts
  tags_raw:
  - BankAccounts
  properties:
  - type: OpenAPI
    url: openapi/gusto-bankaccounts-api-openapi.yml
- 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-contractorpayments-api
  name: Gusto ContractorPayments API
  description: The ContractorPayments API from Gusto — 2 operation(s) for contractorpayments.
  humanURL: https://docs.gusto.com/embedded-payroll
  baseURL: https://api.gusto.com
  tags:
  - Contractor Payments
  tags_raw:
  - ContractorPayments
  properties:
  - type: OpenAPI
    url: openapi/gusto-contractorpayments-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:
  - 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-payschedules-api
  name: Gusto PaySchedules API
  description: The PaySchedules API from Gusto — 2 operation(s) for payschedules.
  humanURL: https://docs.gusto.com/embedded-payroll
  baseURL: https://api.gusto.com
  tags:
  - Pay Schedules
  tags_raw:
  - PaySchedules
  properties:
  - type: OpenAPI
    url: openapi/gusto-payschedules-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
common:
- 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

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/gusto"
All providers 
curl "https://apis.io/api/v1/providers?limit=25"
Every operation they expose 
curl "https://apis.io/api/v1/providers/gusto/operations?limit=25"
How their score was established 
curl "https://apis.io/api/v1/providers/gusto/evidence"

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

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

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