Harvest

List projects (GET /projects)

Retrieve a project by id (GET /projects/{project_id})

Create a project (POST /projects)

Update a project (PATCH /projects/{project_id})

Delete a project (DELETE /projects/{project_id})

List task assignments for a project (GET /projects/{project_id}/task_assignments)

Retrieve a project task assignment (GET /projects/{project_id}/task_assignments/{task_assignment_id})

Create a project task assignment (POST /projects/{project_id}/task_assignments)

Update a project task assignment (PATCH /projects/{project_id}/task_assignments/{task_assignment_id})

Delete a project task assignment (DELETE /projects/{project_id}/task_assignments/{task_assignment_id})

List user assignments for a project (GET /projects/{project_id}/user_assignments)

Retrieve a project user assignment (GET /projects/{project_id}/user_assignments/{user_assignment_id})

Create a project user assignment (POST /projects/{project_id}/user_assignments)

Update a project user assignment (PATCH /projects/{project_id}/user_assignments/{user_assignment_id})

Delete a project user assignment (DELETE /projects/{project_id}/user_assignments/{user_assignment_id})

List users (GET /users)

Retrieve the currently authenticated user (GET /users/me) — safe identity check

Retrieve a user by id (GET /users/{user_id})

Create a user (POST /users) — Admin only; first_name, last_name, email required

Update a user (PATCH /users/{user_id})

Delete a user (DELETE /users/{user_id})

List billable rates for a user (GET /users/{user_id}/billable_rates)

Retrieve a user billable rate (GET /users/{user_id}/billable_rates/{billable_rate_id})

Create a billable rate for a user (POST /users/{user_id}/billable_rates) — amount required

List cost rates for a user (GET /users/{user_id}/cost_rates)

Retrieve a user cost rate (GET /users/{user_id}/cost_rates/{cost_rate_id})

Create a cost rate for a user (POST /users/{user_id}/cost_rates) — amount required

List invoices (GET /invoices) — default per_page is 100

Retrieve an invoice by id (GET /invoices/{invoice_id})

Create an invoice — free-form (line_items) or from tracked time & expenses (line_items_import) (POST /invoices)

Update an invoice; create/update/delete line items via line_items[] (PATCH /invoices/{invoice_id})

Delete an invoice (DELETE /invoices/{invoice_id})

List messages for an invoice (GET /invoices/{invoice_id}/messages)

Create & send an invoice message, or change invoice state via event_type (send | close | re-open | draft) (POST /invoices/{invoice_id}/messages)

Delete an invoice message (DELETE /invoices/{invoice_id}/messages/{message_id})

List payments for an invoice (GET /invoices/{invoice_id}/payments)

Create an invoice payment (POST /invoices/{invoice_id}/payments) — amount required

Delete an invoice payment (DELETE /invoices/{invoice_id}/payments/{payment_id})

List estimates (GET /estimates)

Retrieve an estimate by id (GET /estimates/{estimate_id})

Create an estimate (POST /estimates) — client_id required; line items via line_items[]

Update an estimate; create/update/delete line items via line_items[] (PATCH /estimates/{estimate_id})

Delete an estimate (DELETE /estimates/{estimate_id})

List messages for an estimate (GET /estimates/{estimate_id}/messages)

Create & send an estimate message, or change estimate state via event_type (send | accept | decline | re-open) (POST /estimates/{estimate_id}/messages)

Delete an estimate message (DELETE /estimates/{estimate_id}/messages/{message_id})

List time entries (GET /time_entries) — recommended polling trigger source

Retrieve a time entry by id (GET /time_entries/{time_entry_id})

Create a time entry via duration or start/end time (POST /time_entries). Required: project_id, task_id, spent_date. Provide hours (duration) or started_time/ended_time.

Update a time entry (PATCH /time_entries/{time_entry_id})

Delete a time entry (DELETE /time_entries/{time_entry_id})

Restart a stopped time entry (PATCH /time_entries/{time_entry_id}/restart)

Stop a running time entry (PATCH /time_entries/{time_entry_id}/stop)

List clients (safe identity/connectivity read — GET /clients)

Retrieve a client by id (GET /clients/{client_id})

Create a client (POST /clients) — only name required

Update a client (PATCH /clients/{client_id})

Delete a client (DELETE /clients/{client_id})

List client contacts (GET /contacts)

Retrieve a contact by id (GET /contacts/{contact_id})

Create a client contact (POST /contacts)

Update a contact (PATCH /contacts/{contact_id})

Delete a contact (DELETE /contacts/{contact_id})

List expense categories (GET /expense_categories)

Retrieve an expense category by id (GET /expense_categories/{expense_category_id})

Create an expense category (POST /expense_categories) — only name required

Update an expense category (PATCH /expense_categories/{expense_category_id})

Delete an expense category (DELETE /expense_categories/{expense_category_id})

List expenses (GET /expenses)

Retrieve an expense by id (GET /expenses/{expense_id})

Create an expense via JSON body, no receipt (POST /expenses). Receipt multipart upload deferred — see compatibility.md harvest-06.

Update an expense via JSON body (PATCH /expenses/{expense_id}). delete_receipt boolean supported; multipart receipt upload deferred (harvest-06).

Delete an expense (DELETE /expenses/{expense_id})

List roles (GET /roles) — Admin only

Retrieve a role by id (GET /roles/{role_id})

Create a role (POST /roles) — name required

Update a role (PATCH /roles/{role_id})

Delete a role (DELETE /roles/{role_id})

List tasks (GET /tasks)

Retrieve a task by id (GET /tasks/{task_id})

Create a task (POST /tasks) — Admin/Manager only, only name required

Update a task (PATCH /tasks/{task_id})

Delete a task (DELETE /tasks/{task_id})

Retrieve the company for the authenticated account (GET /company)

Update company settings (PATCH /company)

List all task assignments across the company (GET /task_assignments)

List all user assignments across the company (GET /user_assignments)