Harvest Integration

Time tracking and invoicing for agencies — clients, projects, tasks, timesheets, expenses, estimates, invoices, users, and reports. Sync Harvest tasks, statuses, and assignees with chat, CRM, and documentation tools. When Watch Clients fires, automatically continue with Get Client or Get Company.

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Supported triggers and actions for Harvest integration

Triggers can detect changes in Harvest and run actions that can create, search or modify data inside Harvest automatically [3] — exactly how you set them.

Watch ClientsTriggers when a client is created or updated.
Watch ExpensesTriggers when an expense is created or updated.
Watch InvoicesTriggers when an invoice is created or updated.
Watch ProjectsTriggers when a project is created or updated.
Watch Time EntriesTriggers when a time entry is created or updated.
Get ClientReturns Client.
Get CompanyReturns Company.
Get ContactReturns Contact.
Get Current UserReturns Current User.
Get EstimateReturns Estimate.
Get Estimate Item CategoryReturns Estimate Item Category.
Get ExpenseReturns Expense.
Get Expense Categories ReportReturns Expense Categories Report.
Get Expense CategoryReturns Expense Category.
Get Expense Clients ReportReturns Expense Clients Report.
Get Expense Projects ReportReturns Expense Projects Report.
Get Expense Team ReportReturns Expense Team Report.
Get InvoiceReturns Invoice.
Get Invoice Item CategoryReturns Invoice Item Category.
Get Invoice Message TemplateReturns Invoice Message Template.
Get ProjectReturns Project.
Get Project Budget ReportReturns Project Budget Report.
Get RoleReturns Role.
Get TaskReturns Task.
Get Task AssignmentReturns Task Assignment.
Get Time Clients ReportReturns Time Clients Report.
Get Time EntryReturns Time Entry.
Get Time Projects ReportReturns Time Projects Report.
Get Time Tasks ReportReturns Time Tasks Report.
Get Time Team ReportReturns Time Team Report.
Get Uninvoiced ReportReturns Uninvoiced Report.
Get UserReturns User.
Get User AssignmentReturns User Assignment.
Get User Billable RateReturns User Billable Rate.
Get User Cost RateReturns User Cost Rate.
List ClientsRetrieves Clients.
List ContactsRetrieves Contacts.
List Estimate Item CategoriesRetrieves Estimate Item Categories.
List Estimate MessagesRetrieves Estimate Messages.
List EstimatesRetrieves Estimates.
List Expense CategoriesRetrieves Expense Categories.
List ExpensesRetrieves Expenses.
List Invoice Item CategoriesRetrieves Invoice Item Categories.
List Invoice MessagesRetrieves Invoice Messages.
List Invoice PaymentsRetrieves Invoice Payments.
List InvoicesRetrieves Invoices.
List My Project AssignmentsRetrieves My Project Assignments.
List ProjectsRetrieves Projects.
List Project Task AssignmentsRetrieves Project Task Assignments.
List Project User AssignmentsRetrieves Project User Assignments.
List RolesRetrieves Roles.
List Task AssignmentsRetrieves Task Assignments.
List TasksRetrieves Tasks.
List Time EntriesRetrieves Time Entries.
List User AssignmentsRetrieves User Assignments.
List User Billable RatesRetrieves User Billable Rates.
List User Cost RatesRetrieves User Cost Rates.
List User Project AssignmentsRetrieves User Project Assignments.
List UsersRetrieves Users.
List User TeammatesRetrieves User Teammates.
Create ClientCreates a new client.
Create ContactCreates a new contact.
Create EstimateCreates a new estimate.
Create Estimate Item CategoryCreates a new estimate item category.
Create Estimate MessageCreates a new estimate message.
Create ExpenseCreates a new expense.
Create Expense CategoryCreates a new expense category.
Create InvoiceCreates a new invoice.
Create Invoice Item CategoryCreates a new invoice item category.
Create Invoice MessageCreates a new invoice message.
Create Invoice PaymentCreates a new invoice payment.
Create ProjectCreates a new project.
Create RoleCreates a new role.
Create TaskCreates a new task.
Create Task AssignmentCreates a new task assignment.
Create Time EntryCreates a new time entry.
Create UserCreates a new user.
Create User AssignmentCreates a new user assignment.
Create User Billable RateCreates a new user billable rate.
Create User Cost RateCreates a new user cost rate.
Delete ClientDeletes an existing client.
Delete ContactDeletes an existing contact.
Delete EstimateDeletes an existing estimate.
Delete Estimate Item CategoryDeletes an existing estimate item category.
Delete Estimate MessageDeletes an existing estimate message.
Delete ExpenseDeletes an existing expense.
Delete Expense CategoryDeletes an existing expense category.
Delete InvoiceDeletes an existing invoice.
Delete Invoice Item CategoryDeletes an existing invoice item category.
Delete Invoice MessageDeletes an existing invoice message.
Delete Invoice PaymentDeletes an existing invoice payment.
Delete ProjectDeletes an existing project.
Delete RoleDeletes an existing role.
Delete TaskDeletes an existing task.
Delete Task AssignmentDeletes an existing task assignment.
Delete Time EntryDeletes an existing time entry.
Delete Time Entry External ReferenceDeletes an existing time entry external reference.
Delete UserDeletes an existing user.
Delete User AssignmentDeletes an existing user assignment.
Make an API CallPerforms an arbitrary authorized API call.
Restart Time EntryRestarts a stopped time entry so its timer runs again.
Stop Time EntryStops a running time entry and records its elapsed duration.
Update ClientUpdates an existing client.
Update CompanyUpdates an existing company.
Update ContactUpdates an existing contact.
Update EstimateUpdates an existing estimate.
Update Estimate Item CategoryUpdates an existing estimate item category.
Update ExpenseUpdates an existing expense.
Update Expense CategoryUpdates an existing expense category.
Update InvoiceUpdates an existing invoice.
Update Invoice Item CategoryUpdates an existing invoice item category.
Update ProjectUpdates an existing project.
Update RoleUpdates an existing role.
Update TaskUpdates an existing task.
Update Task AssignmentUpdates an existing task assignment.
Update Time EntryUpdates an existing time entry.
Update UserUpdates an existing user.
Update User AssignmentUpdates an existing user assignment.
Update User TeammatesUpdates an existing user teammates.

How to integrate Harvest in automation workflow?

3 simple steps to make your Harvest connected with other apps in automation workflows on WEXTL. Up to 10 minutes integration set up.

STEP 1

Select Harvest in workflow

Pick Harvest app in the workflow builder [4] - just one click to select the app.

STEP 2

Connect Harvest

When prompted, authorize access to Harvest in WEXTL once. Harvest credentials are encrypted and never shared with WEXTL. Authorization will be reused in any future API calls [3].

WEXTL wants to integrate with your Harvest account. Approve?

STEP 3

Build a workflow

Build your workflow with Harvest yourself or with WEXTL® AI Builder. Connect Harvest to any available integrations [5], or use HTTP node to go beyond them.

Harvest

How Harvest connects and integrates with WEXTL

Save and approve your credentials once — WEXTL® stores authorization information encrypted and reuses the authentication whenever Harvest app is called in workflows. That allows your project management automations to run without your attention, per defined schedule [7]. Explore documentation [6] for a detailed list of fields that Harvest supports.

Full Harvest API documentation

The following table illustrates what fields Harvest integration require during authorization flow inside our workflow builder [4].

Demonstration of Harvest connection step inside WEXTL Workflow Builder [4].

Field	Type	Help
Client ID	text	Harvest ID → Developers → OAuth2 application → Client ID. Optional if platform common.clientId is registered.
Client Secret	password	OAuth2 application client secret.
Account IDRequired	text	account ID to use (Harvest-Account-Id header). Required even when OAuth scope lists multiple accounts.

Connect Harvest to popular apps on WEXTL

Enter a name of the other app you want to sync with Harvest below. Click on selected app to explore integration options with Harvest. If the app you search for is not available in WEXTL yet, you can use HTTP node [10] instead to integrate it directly.

Example automation with Harvest integration

Select Watch Invoices trigger from Harvest - this will be a starting point in your automation. Whenever event happens in Harvest, workflow will start [7] from Watch Invoices node.

Search for Create Invoice Item Category, connect it as the next step of integration sequence. You can use filters between Watch Invoices and Create Invoice Item Category, so only important data pass from Watch Invoices to the next step. WEXTL gives you full control over the process of Harvest automation. All parts of workflow are visible on the canvas [4].

Harvest on WEXTL has 119 modules for building project management automations. Explore Harvest documentation for more.

Harvest

Watch Invoices

AgencyZoom

Performs action

AgencyZoom

Triggers

Harvest

Create Invoice Item Category

Demonstration of how visual Harvest automation [6] looks in WEXTL.

Frequently asked questions

Common questions about automating Harvest in your workflows.

Harvest has 5 triggers, including "Watch Clients", "Watch Expenses", and "Watch Invoices", and more. Triggers are start points of the workflow, and automations may start from them.

Integration has 114 actions, including "Get Client", "Get Company", and "Get Contact", and more. Refer to our Harvest Documentation for detailed inputs and outputs.

No. Most automations are built visually on the canvas by picking triggers, actions, and mapping fields. You can add custom JavaScript with Functions when advanced logic is needed — but our customers do that in rare cases [4].

Yes. Connections are authenticated per account, credentials are encrypted at rest, and you can enforce approvals and team-level access controls on any automation.

The Harvest integration on WEXTL runs directly on its vendor public API — every field name, authentication method, and rate limit is controlled by Harvest official API and covered in documentation [3]. WEXTL handles the request signing and pagination for you.

Absolutely. Where Harvest provides native webhooks, you can use instant triggers to eliminate polling delay. For custom webhooks, WEXTL offers Custom Webhook node, so you can start automation whenever Harvest or any other service sends event to webhook URL.

WEXTL is an AI-first visual canvas. The platform allows you to describe automation in plain text — and AI will wire nodes for Harvest inside the workflow builder [4]. You can also use built-in workflow nodes (AI Agent, Human in the Loop, Condition, Aggregate Results) in pair with Harvest modules to craft complex integration flows with branches, filtering, and conditional logic. There are absolutely no limits of what you can build.

References

List of sources used to gather information about the Harvest integration.

Harvest integration source code, module specs and credentials implementation.
Internal Harvest integration documentation, structured input and output parameters, scopes, and authentication methods.
Official Harvest vendor API documentation — used to verify field meanings, authentication flows, and anything our own specs don't fully capture.
WEXTL® Visual Workflow Builder, anonymized data from our technical support team.
WEXTL® Apps Library
WEXTL® Harvest App Documentation
WEXTL® Workflow Scheduler
WEXTL® HTTP node documentation

Harvest Integration

Supported triggers and actions for Harvest integration