Gusto MCP Server
for AI Agents
Connect your AI agent to StackOne's Gusto MCP server and give it 96 MCP tools out of the box. Auth, tool execution, and security all managed.
StackOne 
Coverage
96 Agent Actions
Create, read, update, and delete across Gusto — and extend your agent's capabilities with custom actions.
Authentication
Agent Tool Authentication
Per-user OAuth in one call. Your Gusto MCP server gets session-scoped tokens with zero credentials stored on your infra.
Agent Auth →
Security
Agent Protection
Every Gusto tool response scanned for prompt injection in milliseconds — 88.7% accuracy, all running on CPU.
Prompt Injection Defense →
Performance
Max Agent Context. Min Cost.
Free up to 96% of your agent's context window to enhance reasoning and reduce cost, on every Gusto call.
Tools Discovery →What is the Gusto MCP Server?
A Gusto MCP server lets AI agents read and write Gusto data through the Model Context Protocol — Anthropic's open standard for connecting LLMs to external tools. StackOne's Gusto MCP server ships with 96 pre-built actions, fully extensible via the Connector Builder — plus managed authentication, prompt injection defense, observability, and agent execution runtime. Connect it from MCP clients like Claude Desktop, Claude Code, Cursor, Goose, and VS Code, or from agent frameworks like OpenAI Agents SDK, LangChain, and Vercel AI SDK.
All Gusto MCP Tools
Every action from Gusto's API, ready for your agent. Create, read, update, and delete — scoped to exactly what you need.
Company Bank Accounts
- Create Company Bank Account
Create a new company bank account
- List Company Bank Accounts
Get all bank accounts for a company
- Delete Company Bank Account
Disable a company bank account
Company Benefits
- List Company Benefits
Get all benefits for a company
- Get Company Benefit
Get details of a specific company benefit
- Update Company Benefit
Update an existing company benefit
Employee Benefits
- Create Employee Benefit
Enroll an employee in a company benefit
- List Employee Benefits
Get all benefits for an employee
- Get Employee Benefit
Get details of a specific employee benefit enrollment
- Update Employee Benefit
Update an employee's benefit enrollment
- Delete Employee Benefit
Remove an employee from a benefit enrollment
Company Attachments
- Upload Company Attachment
Upload a file as a company attachment
- List Company Attachments
List all attachments for a company
- Get Company Attachment
Get a specific company attachment by UUID
Compensations
- Create Compensation
Create a new compensation for a job
- Get Compensation
Get details of a specific compensation
- Update Compensation
Update an existing compensation
- Delete Compensation
Delete a compensation
Contractors
- Create Contractor
Create a new contractor for the company
- List Contractors
Get all contractors for a company
- Get Contractor
Get details of a specific contractor
- Update Contractor
Update a contractor's information
- Delete Contractor
Delete a contractor
Departments
- Create Department
Create a new department for the company
- List Departments
Get all departments for a company
- Get Department
Get details of a specific department
- Update Department
Update an existing department
- Delete Department
Delete a department
Employees
- Create Employee
Create a new employee
- List Employees
Get all employees for a company
- Get Employee
Get details of a specific employee
- Update Employee
Update an employee
Home Address
- Get Home Address
Get a specific home address
- Update Home Address
Update an employee's home address
- Delete Home Address
Delete an employee's home address
Work Address
- Get Work Address
Get a specific work address
- Update Work Address
Update an employee's work address
- Delete Work Address
Delete an employee's work address
Jobs
- Create Job
Create a new job for an employee
- Get Job
Get details of a specific job
- Update Job
Update an existing job
- Delete Job
Delete a job
Company Locations
- Create Company Location
Create a new company location
- List Company Locations
Get all locations for a company
Locations
- Get Location
Get details of a specific location
- Update Location
Update an existing location
Payrolls
- Get Payroll
Get details of a specific payroll
- Delete Payroll
Delete an unprocessed payroll
Pay Schedules
- Create Pay Schedule
Create a new pay schedule for the company
- List Pay Schedules
Get all pay schedules for a company
- Get Pay Schedule
Get details of a specific pay schedule
- Update Pay Schedule
Update an existing pay schedule
Time Off Policys
- Create Time Off Policy
Create a new time off policy for the company
- Get Time Off Policy
Get details of a specific time off policy
- Update Time Off Policy
Update an existing time off policy
Other (41)
- Create Employee Home Address
Create a home address for an employee
- Create Employee Work Address
Create a work address for an employee
- Create Off-Cycle Payroll
Create a new off-cycle payroll
- Add Employees To Time Off Policy
Add employees to a time off policy
- Get Company
Get details of a specific company
- Get Company Attachment Download URL
Get a temporary download URL for a company attachment
- List Job Compensations
Get all compensations for a job
- List Employee Home Addresses
Get all home addresses for an employee
- List Employee Work Addresses
Get all work addresses for an employee
- Get Employee Custom Fields
Get custom field values for an employee
- Get Employee Employment History
Get employment history for an employee
- List Employee Jobs
Get all jobs for an employee
- List Company Payrolls
Get all payrolls for a company
- List Time Off Policies
Get all time off policies for a company
- Update Employee Time Off Balances
Update time off balances for employees on a policy
- Verify Company Bank Account
Verify a company bank account using micro-deposits
- Terminate Employee
Terminate an employee
- Webhook Subscription Verify
Handles Gusto's async subscription verification — obtains a system access token and confirms the verification_token so the subscription becomes active.
- Webhook Verification
Acknowledges any unmatched payload with a 200 and no emitted event, so the webhook stays healthy.
- Bank Account Webhook
Processes Gusto BankAccount webhook events for company, employee, and contractor bank accounts (e.g. company.bank_account.created).
- Company Webhook
Processes Gusto Company webhook events (e.g. company.provisioned).
- Company Benefit Webhook
Processes Gusto CompanyBenefit webhook events (e.g. company_benefit.created).
- Contractor Webhook
Processes Gusto Contractor webhook events (e.g. contractor.created).
- Contractor Payment Webhook
Processes Gusto ContractorPayment webhook events (e.g. contractor_payment.created).
- Contractor Payment Group Webhook
Processes Gusto ContractorPaymentGroup webhook events (e.g. contractor_payment_group.created).
- Document Webhook
Processes Gusto Document webhook events (e.g. contractor.document.created).
- Employee Webhook
Processes Gusto Employee webhook events (e.g. employee.created).
- Home Address Webhook
Processes Gusto HomeAddress webhook events (e.g. employee.home_address.created).
- Work Address Webhook
Processes Gusto WorkAddress webhook events (e.g. employee.work_address.created).
- Employee Benefit Webhook
Processes Gusto EmployeeBenefit webhook events (e.g. employee_benefit.created).
- Employee Job Compensation Webhook
Processes Gusto EmployeeJobCompensation webhook events (e.g. employee_job_compensation.created).
- External Payroll Webhook
Processes Gusto ExternalPayroll webhook events (e.g. external_payroll.created).
- Fast Ach Config Webhook
Processes Gusto FastAchConfig webhook events (e.g. fast_ach_config.activated).
- Form Webhook
Processes Gusto Form webhook events (e.g. form.created).
- Generated Document Webhook
Processes Gusto GeneratedDocument webhook events (e.g. generated_document.generated).
- Location Webhook
Processes Gusto Location webhook events (e.g. location.created).
- Notification Webhook
Processes Gusto Notification webhook events (e.g. notification.information_request.created).
- Payroll Webhook
Processes Gusto Payroll webhook events (e.g. payroll.created).
- Pay Schedule Webhook
Processes Gusto PaySchedule webhook events (e.g. pay_schedule.created).
- Signatory Webhook
Processes Gusto Signatory webhook events (e.g. signatory.created).
- Time Off Request Webhook
Processes Gusto TimeOffRequest webhook events (e.g. time_off_request.created).
Gusto AI Agent Use Cases
Connect your AI agent to Gusto and help your team scale the HR operations they run by hand today.
Use StackOne to connect your AI agent to your HRIS, identity management, and LMS to automate employee onboarding.
ViewUse StackOne to connect your AI agent to your HRIS, knowledge base, and messaging tools to automate HR policy Q&A.
ViewUse StackOne to connect your AI agent to your HRIS, identity management, and ITSM to automate employee offboarding and deprovisioning.
ViewSet Up Your Gusto MCP Server in Minutes
One endpoint. Any framework. Your agent is talking to Gusto in under 10 lines of code.
Agent Frameworks
JSON{
"mcpServers": {
"stackone": {
"command": "npx",
"args": [
"-y",
"mcp-remote@latest",
"https://api.stackone.com/mcp?x-account-id=<account_id>",
"--header",
"Authorization: Basic <YOUR_BASE64_TOKEN>"
]
}
}
}Check More HRIS / HCM MCP Servers
162+ actions
131+ actions
127+ actions
123+ actions
120+ actions
117+ actions
116+ actions
Platform Resources
MCP Code Mode: Keeping Tool Responses Out of Agent Context
Anthropic's code_execution processes data already in context. Custom MCP code mode keeps raw tool responses in a sandbox. 14K tokens vs 500.
11 min
Comparing BM25, TF-IDF, and Hybrid Search for MCP Tool Discovery
Benchmarking BM25, TF-IDF, and hybrid search for MCP tool discovery across 916 tools. The 80/20 TF-IDF/BM25 hybrid hits 21% Top-1 accuracy in under 1ms.
10 min
Indirect Prompt Injection Defense for MCP Tools: A Technical Guide
MCP tools that read emails, CRM records, and tickets are indirect prompt injection vectors. Here's how we built a two-tier defense that scans tool results in ~11ms.
12 min
MCP vs A2A: Architecture, Security, and When to Use Each
MCP vs A2A: what each protocol standardizes, how they differ, their shared security risks including indirect prompt injection, and when to use one, both, or a hybrid architecture.
12 min
MCP vs API: What Hundreds of Connector Builds Taught Us
MCP wraps APIs, it doesn't replace them. After building hundreds of connectors that serve both, here's when each approach wins.
14 min read
Gusto MCP Server FAQ
Does StackOne have a Gusto MCP server?
Gusto MCP server vs direct API integration — what's the difference?
How does Gusto authentication work for AI agents?
origin_owner_id.Are Gusto MCP tools vulnerable to prompt injection?
What is the context bloat of a Gusto agent and how do I avoid it?
Can I limit which actions my Gusto agent can access?
Can I create custom agent actions for my Gusto MCP server?
When should I NOT use a Gusto MCP server?
What AI frameworks and AI clients does the StackOne Gusto MCP server support?
Put your AI agents to work
All the tools you need to build and scale AI agent integrations, with best-in-class connectivity, execution, and security.