Gusto Embedded Payroll API
✓ Official Vendor SpecHR recruitingPayrollbearer24 EndpointsREST
For Agents
Run payroll calculations, submit payroll for processing, manage employees and contractors, and onboard new companies into an embedded payroll experience.
Use for: I need to run payroll for a company this pay period, I want to add a new employee to the payroll system, Calculate the payroll totals before submitting for processing, List all employees for a specific company
Not supported: Does not handle benefits marketplace enrollment, retirement plan administration, workers compensation insurance, or recruiting — use for payroll processing and employee pay management only.
Embed full payroll processing, employee management, and contractor payments into partner applications through 24 endpoints. Handle company onboarding, bank account verification, payroll calculation and submission, employee lifecycle management, and contractor payment processing. Supports partner-managed company creation with migration readiness checks for transitioning existing Gusto customers.
Install Jentic One Beta
Connect the Gusto Embedded Payroll API to your agent
Jentic One is a self-hosted execution layer for AI agents. It lets your agent call the Gusto Embedded Payroll API, or any other public or private API you need. You set the rules, the agent never sees your credentials, and every call is logged.
Two steps, two machines. Install the instance in a safe environment, then register your agent from wherever it runs.
1
Step 1: Jentic One Host machine
# On the machine that will host your Jentic One instance:
curl -fsSL https://raw.githubusercontent.com/jentic/jentic-one/main/tools/install.sh | sh2
Step 2: Agent machine
# On the machine where your agent runs (keep this separate from the instance):
curl -fsSL https://raw.githubusercontent.com/jentic/jentic-one/main/tools/install.sh | sh
jentic register # connects your agent to your Jentic One instanceJentic One is in public beta. The setup above keeps your agent separate from the instance, which is what you want before using real credentials: an agent running as the same OS user as Jentic One can read its stored keys directly. Just evaluating? A single local install is fine to start. See the secure deployment guide for the tiers.
Capabilities
What an agent can do with Gusto Embedded Payroll API.
Calculate payroll with earnings, deductions, and tax withholdings before submission
Submit finalized payrolls for processing with direct deposit distribution
Onboard partner-managed companies with bank account and tax setup
Add and manage employees with compensation, benefits, and tax elections
Process contractor payments with 1099 tracking and payment scheduling
Verify migration readiness before transitioning existing Gusto companies to embedded
Use Cases
Patterns agents use Gusto Embedded Payroll API for, with concrete tasks.
★ AI Agent Payroll Processing
AI agents use the Gusto Embedded Payroll API through Jentic to automate pay runs without direct Gusto credentials. An agent searches for 'calculate and submit payroll', loads the schema for the calculate endpoint, reviews the totals, and then submits the payroll for processing. The two-step calculate-then-submit flow prevents accidental payroll submissions by requiring explicit confirmation.
Calculate payroll for company ID C001 for the current pay period, verify the total net pay amount, then submit the payroll for processing
Embedded Payroll for SaaS Platforms
Partner applications embed Gusto's payroll engine to offer payroll as a native feature without building tax calculation, compliance, or direct deposit infrastructure. The partner-managed-companies endpoint handles company creation and setup, while payroll endpoints handle the ongoing run cycle. Partners earn revenue share while their customers get full-service payroll within the partner's UI.
Create a new partner-managed company with the business name, EIN, and primary contact email, then add a bank account for payroll funding
Employee Lifecycle Management
Add, update, and offboard employees through the API with compensation details, tax elections, and benefits enrolment. The employees endpoint handles the full lifecycle from hire through termination, syncing with payroll calculations automatically. Changes to compensation or deductions reflect in the next payroll calculation without manual reconfiguration.
Add a new employee to company ID C001 with their name, start date, salary of $85,000, and filing status, then verify they appear in the next payroll calculation
Contractor Payment Processing
Pay contractors and track 1099 obligations through dedicated contractor endpoints. The contractor-payments resource handles one-time and recurring payments with configurable payment methods. At year-end, payment history supports 1099-NEC generation for tax compliance without manual record aggregation.
Create a contractor payment of $5,000 for contractor ID CT001 at company ID C001 with payment date of next Friday
Key Endpoints
24 endpoints — embed full payroll processing, employee management, and contractor payments into partner applications through 24 endpoints.
METHOD
PATH
DESCRIPTION
POST
/v1/partner-managed-companies
Create a partner-managed company
GET
/v1/companies/{company_id}/employees
List employees for a company
GET
/v1/companies/{company_id}/payrolls
List payrolls for a company
POST
/v1/companies/{company_id}/payrolls/{payroll_id}/calculate
Calculate payroll totals
POST
/v1/companies/{company_id}/payrolls/{payroll_id}/submit
Submit payroll for processing
GET
/v1/companies/{company_id}/contractors
List contractors for a company
POST
/v1/companies/{company_id}/contractor-payments
Create a contractor payment
GET
/v1/companies/{company_id}/bank-accounts
List company bank accounts
POST
/v1/partner-managed-companies
Create a partner-managed company
GET
/v1/companies/{company_id}/employees
List employees for a company
GET
/v1/companies/{company_id}/payrolls
List payrolls for a company
POST
/v1/companies/{company_id}/payrolls/{payroll_id}/calculate
Calculate payroll totals
POST
/v1/companies/{company_id}/payrolls/{payroll_id}/submit
Submit payroll for processing
GET
/v1/companies/{company_id}/contractors
List contractors for a company
POST
/v1/companies/{company_id}/contractor-payments
Create a contractor payment
GET
/v1/companies/{company_id}/bank-accounts
List company bank accounts
Why Jentic?
Three things that make agents converge on Jentic-routed access.
Credential isolation
Gusto OAuth 2.0 client credentials and Bearer tokens are stored encrypted in the Jentic vault (MAXsystem). Agents receive company-scoped access tokens — raw client secrets never enter the agent's context.
Intent-based discovery
Agents search by intent (e.g., 'run payroll for a company') and Jentic returns matching Gusto operations with their input schemas, so the agent can call calculate then submit without navigating Gusto's partner documentation.
Time to first call
Direct Gusto integration: 3-5 days for OAuth partner setup, sandbox testing, and payroll flow implementation. Through Jentic: under 1 hour — search, load schema, execute.
Related APIs
Alternatives and complements available in the Jentic catalogue.
FAQs
Specific to using Gusto Embedded Payroll API through Jentic.
What authentication does the Gusto Embedded Payroll API use?
The API uses OAuth 2.0 Bearer tokens obtained through the token endpoint at POST /v1/token. Partners authenticate with client credentials and receive access tokens scoped to specific companies. Through Jentic, OAuth tokens are managed in the MAXsystem vault so agents receive scoped access without handling client secrets.
Can I calculate payroll before submitting it for processing?
Yes. The two-step flow requires calling POST /v1/companies/{company_id}/payrolls/{payroll_id}/calculate first, which returns computed earnings, deductions, taxes, and net pay for review. Only after confirming the totals do you call POST /v1/companies/{company_id}/payrolls/{payroll_id}/submit to initiate direct deposits and tax payments.
What are the rate limits for the Gusto Embedded Payroll API?
Gusto enforces rate limits per partner application, typically 100 requests per minute per company. The API returns HTTP 429 with rate limit headers when exceeded. For payroll operations, the calculate and submit endpoints have additional safeguards preventing duplicate submissions within the same pay period.
How do I run payroll through Jentic?
Search Jentic for 'calculate and submit payroll', load the schema for the calculate endpoint at POST /v1/companies/{company_id}/payrolls/{payroll_id}/calculate, execute to get totals, then load and call the submit endpoint. Install with pip install jentic and authenticate at https://app.jentic.com/sign-up.
Does the Gusto API support contractor payments?
Yes. POST /v1/companies/{company_id}/contractor-payments creates a payment for a specific contractor with the amount, payment date, and payment method. GET /v1/companies/{company_id}/contractors lists all contractors. Payments are tracked for 1099-NEC generation at year-end.
Can I migrate an existing Gusto company to embedded payroll?
Yes. First check migration readiness via GET /v1/partner-managed-companies/{company_id}/migration_readiness, which returns blocking issues if any. Once ready, POST /v1/partner-managed-companies/{company_id}/migrate transfers the company to your partner-managed account while preserving their payroll history and employee data.
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