Harvest

Live 78 Actions

Harvest Integration for AI Agents

Connect your AI agent to 78 QA'd Harvest actions via MCP, A2A, or SDK, with agent authentication, tool-calling execution, and security built-in.

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Harvest AI Agent Actions

78 production-ready actions for your agent to do more on Harvest.

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78 Actions

List Clients - List all clients in the Harvest account.

Get Client - Retrieve a single client by ID.

Create Client - Create a new client.

Update Client - Update an existing client.

Delete Client - Delete a client.

Get Company - Retrieve the company for the currently authenticated user.

List Contacts - List all contacts in the Harvest account.

Get Contact - Retrieve a single contact by ID.

Create Contact - Create a new contact.

Update Contact - Update an existing contact.

Delete Contact - Delete a contact.

List Estimate Item Categories - List all estimate item categories in the Harvest account.

Create Estimate Message - Create a new message for an estimate.

Mark Estimate As Sent - Mark a draft estimate as sent.

Mark Estimate As Accepted - Mark an open estimate as accepted.

List Estimates - List all estimates in the Harvest account.

Get Estimate - Retrieve a single estimate by ID.

Create Estimate - Create a new estimate.

Update Estimate - Update an existing estimate.

Delete Estimate - Delete an estimate.

List Expense Categories - List all expense categories in the Harvest account.

List Expenses - List all expenses in the Harvest account.

Get Expense - Retrieve a single expense by ID.

Create Expense - Create a new expense, optionally with a receipt file attached.

Update Expense - Update an existing expense, optionally replacing or deleting its receipt.

Delete Expense - Delete an expense.

List Invoice Item Categories - List all invoice item categories in the Harvest account.

List Invoice Messages - List all messages associated with a specific invoice.

Create Invoice Message - Create and send a new invoice message.

Mark Invoice As Sent - Mark a draft invoice as sent.

Mark Invoice As Closed - Mark an open invoice as closed (written off).

Delete Invoice Message - Delete an invoice message.

List Invoice Payments - List all payments recorded against an invoice.

Create Invoice Payment - Record a new payment against an invoice.

Delete Invoice Payment - Delete an invoice payment.

List Invoices - List all invoices in the Harvest account.

Get Invoice - Retrieve a single invoice by ID.

Create Free-Form Invoice - Create a new free-form invoice. Preview — payment_options values (ach, credit_card) require the corresponding payment gateway integration (Stripe / ACH) to be activated in the Harvest workspace under Settings > Integrations; without it, Harvest rejects the call with 422 "Enabled payment options is invalid". PayPal works on accounts where the PayPal integration is active.

Create Invoice From Tracked Time And Expenses - Create a new invoice populated from tracked time and expenses. Preview — payment_options values (ach, credit_card) require the corresponding payment gateway integration (Stripe / ACH) to be activated in the Harvest workspace under Settings > Integrations; without it, Harvest rejects the call with 422 "Enabled payment options is invalid". PayPal works on accounts where the PayPal integration is active.

Update Invoice - Update an existing invoice. Preview — payment_options values (ach, credit_card) require the corresponding payment gateway integration (Stripe / ACH) to be activated in the Harvest workspace under Settings > Integrations; without it, Harvest rejects the update with 422 "Enabled payment options is invalid". PayPal works on accounts where the PayPal integration is active.

Delete Invoice - Delete an invoice.

List Projects - List all projects in the Harvest account.

Get Project - Retrieve a single project by ID.

Create Project - Create a new project.

Update Project - Update an existing project.

Delete Project - Delete a project.

List Team Time Report - Retrieve aggregated time totals grouped by team member for a given timeframe.

List Project Budget Report - Retrieve budget information for projects that have been assigned a budget.

List Uninvoiced Report - Retrieve uninvoiced hours and expenses for all billable projects in a timeframe.

List Roles - List all roles in the Harvest account.

Get Role - Retrieve a single role by ID.

List Task Assignments - List all task assignments across all projects in the Harvest account.

List Task Assignments For Project - List all task assignments for a specific project.

List Tasks - List all tasks in the Harvest account.

Get Task - Retrieve a single task by ID.

Create Task - Create a new task.

Update Task - Update an existing task.

Delete Task - Delete a task.

List Time Entries - List all time entries in the Harvest account.

Get Time Entry - Retrieve a single time entry by ID.

Create Time Entry Via Duration - Create a new time entry using duration (hours).

Create Time Entry Via Start And End Time - Create a new time entry using start and end times.

Update Time Entry - Update an existing time entry.

Delete Time Entry - Delete a time entry.

Restart Time Entry - Restart a stopped time entry.

Stop Time Entry - Stop a running time entry.

List User Assignments - List all user assignments across all projects in the Harvest account.

List User Assignments For Project - List all user assignments for a specific project.

List User Billable Rates - List all billable rates for a specific user.

List User Cost Rates - List all cost rates for a specific user.

List User Project Assignments - List active project assignments for a specific user.

List My Project Assignments - List active project assignments for the currently authenticated user.

List Users - List all users in the Harvest account.

Get Current User - Retrieve the currently authenticated user.

Get User - Retrieve a single user by ID.

Create User - Create a new user.

Update User - Update an existing user.

Delete User - Delete a user.

Do More, Build Less

Integration Infrastructure for Harvest AI Agents

Multiple Interfaces

Access integrations via API, AI SDKs, MCP & A2A.

Harvest MCP server

Managed Authentication

Pre-built authentication UI.

Agent auth

Falcon Engine

Every Harvest action runs on Falcon.

Agent Execution Engine

StackOne Defender

88.7% prompt injection detection.

Prompt injection defense

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Luna Schmid, Partner at GV

"We've been impressed by how quickly and deeply StackOne integrates with complex enterprise systems -- and now, with their focus on agent-to-agent interoperability, they're unlocking even more powerful use cases for customers. StackOne delivers all of the above in a universal layer -- without compromise."