Harvest

Read and write Harvest clients, contacts, projects, tasks, assignments, time entries and expenses; read invoices.

Turn tracked time and expenses into billing, payroll and project profitability data.

Build a flow with Harvest Provider API documentation

Source actions

Destination actions

Data types

Validation status

Implemented · fixture tested.

Implementation is checked against provider-shaped fixtures for every action, authentication failures, rate limits, pagination and duplicate safety. Provider sandbox and authorised account validation are recorded separately when credential-backed runs are completed.

What you can map

clients

Create client
Destination
Not retried automatically
Creates a client.
List clients
Source
Incremental
Clients, optionally only active ones or those updated since a time.
Update client
Destination
Duplicate protected
Updates supplied client fields.

company

Get company settings
Source
Account settings, including the timer mode that decides time entry fields.

contacts

Create client contact
Destination
Not retried automatically
Creates a contact for a client.
List client contacts
Source
Incremental
Contacts, optionally for one client.
Update client contact
Destination
Duplicate protected
Updates supplied contact fields.

expense categories

List expense categories
Source
Incremental
Expense categories with unit names and prices.

expenses

Create expense
Destination
Not retried automatically
Records an expense on a project; supply units or total cost.
List expenses
Source
Incremental
Expenses with category, cost, approval and billing state.
Update expense
Destination
Duplicate protected
Updates supplied fields on an expense that is not locked.

invoices

List invoices
Source
Incremental
Invoices with amounts, state, dates and line items (read-only).

projects

Create project
Destination
Not retried automatically
Creates a project for a client.
List projects
Source
Incremental
Projects with client, billing and budget settings.
Update project
Destination
Duplicate protected
Updates supplied project fields.

task assignments

Assign task to project
Destination
Not retried automatically
Adds a task to a project with optional rate and budget.
List task assignments
Source
Incremental
Tasks assigned to projects with billable rates and budgets.
Update task assignment
Destination
Duplicate protected
Updates billable flag, rate, budget or active state of a task assignment.

tasks

Create task
Destination
Not retried automatically
Creates an account task type.
List tasks
Source
Incremental
Account task types (for example Design, Development) used on projects.
Update task
Destination
Duplicate protected
Updates supplied task fields.

time entries

Create time entry
Destination
Not retried automatically
Logs time on a project task, by hours (duration accounts) or start and end times (timestamp accounts).
List time entries
Source
Incremental
Time entries with project, task, rates, approval and invoice state.
Update time entry
Destination
Duplicate protected
Updates supplied fields on a time entry that is not locked.

user assignments

Assign user to project
Destination
Not retried automatically
Adds a user to a project.
List user assignments
Source
Incremental
People assigned to projects, with project manager flag and rates.

users

List users
Source
Incremental
Team members with roles, capacity and rates.

Authentication

Personal access token with Harvest account ID

Plans and access

All Harvest plans, including Free. Personal access tokens act as the creating user. Users, clients, projects and invoices need Administrator or Manager permissions; Members only see their own time and expenses.

Test environment

Use a free Harvest account or the 30-day trial for testing.

Rate limits

100 requests per 15 seconds per token (Reports API 100 per 15 minutes); HTTP 429 with Retry-After.

Provider events

Harvest API v2 has no webhooks. Nexra event triggers are not yet available; flows run on demand or on a schedule.

Before you build a flow

Time entry fields depend on the account timer mode: duration accounts use hours, timestamp accounts use started and ended times.
Invoices are read-only in Nexra; creating, sending or paying invoices is not automated.
Expense receipt files are not uploaded or downloaded; receipt metadata is read.
Harvest has no idempotency key; uncertain creates are not repeated automatically.
Harvest has no webhooks; flows poll with updated_since.