Popular features

Everything for your administration

From time tracking to invoicing, reporting and automation. Jump straight to the part you need.

Time tracking

Log your hours quickly and easily, using a short message or a voice note..

Customer Management

Manage all your clients in one place, including contact details and linked invoices.

Invoices

Create clear invoices in one step, based on your logged hours.

Quotes

Create quotes with invoice-style lines, email them to your client, and convert accepted quotes into invoices.

Projects

Work in a structured way per job and bundle hours, clients, expenses, and invoices per project.

Track Expenses

Log expenses manually or let UurKlus automatically process your UBL invoices. Our smart suggestions guide you through complex financial decisions, such as managing fixed assets.

Reports and insight

From overview to detail: charts, profit & loss, balance sheet, and VAT — always real-time insight into your numbers.

UurKlus Assist

Type or speak plain-language commands, such as logging time or asking for pending invoices.

AI agents & API

Let OpenAI Agents, Make or other automations securely retrieve and create clients, projects and draft invoices with API keys.

Pricing Support Accountants

About us

Who we are and how it all started.

Contact

Do you have a question about UurKlus?

Changelog

Bekijk wat er nieuw is in UurKlus.

How to start with UurKlus

Short guide to start quickly with UurKlus.

Security

At UurKlus, we take the security of your data seriously.

Help Center

Quick guidance for invoices, expenses, VAT corrections, and the key parts of UurKlus.

Bookkeeping explained

A simple explanation of bookkeeping, VAT, profit, balance sheets, and what these terms mean for your business.

Automation

Let agents work with your administration safely

Use API keys for OpenAI Agents, Make or other automations. Let tools retrieve clients, projects and invoices or prepare drafts while control stays in UurKlus.

Start with UurKlus View all features

VAT, returns and document retention Read the tax guide on VAT profiles, KOR, EC Sales Lists, annual review and return reconciliation, with Tax Administration sources.

AI agents & API

Booking your hours in UurKlus is super easy

The API uses Bearer authentication with API keys and endpoints for clients, projects and invoices. Rate limits protect the environment and drafts keep users in control.

Bearer API keys

Automations use an API key through the Authorization header.

Clients, projects and invoices

Endpoints support retrieving and creating clients, projects and draft invoices.

Limits and control

Rate limits and draft flows keep automation manageable.

Based on the API docs

What can you do with it?

Base URL and authentication

You use https://uurklus.nl/api/agents/v1 as the base URL and Bearer authentication with an API key.

Available endpoints

You have endpoints for clients, time entries, projects and invoices: list, retrieve and create.

OpenAI Actions

Read more in de APP documentation about OpenAPI link and function-calling example so agents can make structured requests.

Make and other automation

Tools like Make can use the same API to build workflows around clients, time entries, projects and draft invoices.

Rate limits

You have limites on minute and daily limits. This keeps integrations reliable and prevents misuse.

Workflow

How it works in UurKlus

Create an API key

Go to your company settings to add an api key. You can revoke it anytime.

Use Bearer authentication

Send the key as an Authorization: Bearer token.

Connect OpenAI, Make or custom tooling

Use the endpoints for clients, projects and invoices.

Prepare drafts

Automation can prepare data while finalizing and sending remains controlled.

Frequently asked questions

Which authentication does the API use?: Bearer authentication with an API key in the Authorization header.
Which data can an agent use?: Clients, hours, projects and invoices
Can an agent send finalized invoices automatically?: An agent can only make concept invoices, to finalize and send you will need to go to UurKlus.