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Accounting packages, CRMs, shipping tools, payment providers, project boards, chat, HR systems. 30 of them here, each with its own page: what it does, what the manual workaround is costing you, exactly which fields and processes can be connected, and what it costs to build. Your tool not in the list? We connect it anyway — the list is what we get asked for most, not a limit.
Orders that become invoices without anyone retyping them, and stock and payment status that agree with the books.
Leads from your website that land in the system your sales people actually work in, with the source still attached.
Labels, track and trace and stock that move by themselves between your shop, your warehouse and your carrier.
Payment status that is the same number in your shop, your books and your bank, on the day it happened.
A form, an order or a signed quote that opens the task, the project or the board it should, without a copy-paste step.
The message that reaches the person who has to act, in the channel they already have open, with the data in it.
Vacancies on your careers page the moment they open, applications back in the system, and a team page that keeps itself right.
Lists that fill themselves from the site and the shop, with the segment and the consent already right.
The platform most of these connections run to or from, and the stock numbers everything else depends on.
No tool by that name here yet. We probably still connect it — ask.
A connection needs two ends. Plenty of agencies will build you the API call and hand you a JSON payload; that is the easy half. The harder half is what the data lands in — a website, a webshop, a portal your customers log into, an internal tool that replaces a spreadsheet. JKC builds both ends, which is why the connections we build tend to keep working: nothing about the receiving side is a black box to us.
The connection itself: authentication, field mapping, rate limits, retries and a queue that survives the other system being down for an hour. Built against the documented API where there is one, and against whatever the vendor really offers where there is not.
WordPress sites that read from your systems instead of repeating them by hand: a careers page fed by your HR system, a team page that follows your payroll, prices and availability that are the real ones.
WooCommerce shops where the order is the last time anyone types it: it becomes an invoice in your accounting package, a label at your carrier, a stock mutation in your warehouse, and a line in your CRM, on its own.
When the process does not fit any standard product: a customer portal, a quoting tool, a planning board, a dashboard that reads three systems at once. Built on your data, with your systems as the source instead of a copy of them.
The same four steps every time, whichever tool it is. Nothing here is a workshop you pay for: step one exists because scoping a connection wrong is the single most expensive thing that can happen to it.
Not "which fields exist" but "which fields does somebody currently move by hand, how often, and what breaks when they get it wrong". Most projects turn out to need two or three flows, not a full two-way sync of everything. That conversation is what keeps the quote where it is.
A maintained connector from the vendor, a platform like Make or Zapier, or a custom integration against the API. Cheapest first, not custom first: if a supported plugin does exactly what you need, that is the answer and we will tell you so. Custom is for the cases where the off-the-shelf option would need so much configuring that it becomes the fragile option.
Every connection ships with retries, a queue and an idempotency key, so an order that arrives while the other side is down is delivered later rather than lost, and a retry does not create a second invoice. On a test environment first where the vendor offers one, so the first thing your real administration sees is a working connection.
Which alerts you will get, what each one means, what to do about it, and who to call. Plus the credentials in your own name, in your own vault — not in ours. A connection nobody but us can maintain is a connection you do not own.
This is the part most quotes leave out. A connection that stops working without telling anyone is worse than manual work, because with manual work at least somebody notices when it does not get done. Every connection JKC builds is monitored, and the monitoring is not an upsell — it is in the service fee.
A message that does not get through raises an alert the same hour, with the record it was about. Not a dashboard you have to remember to look at.
Anything that failed sits in a queue and can be sent again once the cause is fixed, in order. Nobody goes back through yesterday to find the four orders that did not land.
APIs get versioned, deprecated and rate-limited. When a vendor announces a change that affects your connection, adjusting to it is part of the service fee, not a new project.
A connection starts from €1,700 plus a monthly service fee, which covers the monitoring, the queue and keeping up with the vendor's API changes. Work outside a fixed scope is €95 per hour.
What moves the number is not the tool — it is how well the system on the other end is known. If JKC built your website, your webshop or your web application, we already know its data model, its edge cases and where its stock numbers really come from, and a connection into it is mostly configuration and testing. If it is a system we have never opened, we start with a short technical check of both sides and quote after that, so you are not paying hourly for us to work out the basics.
Two more things that move it, in our experience more than anything else: whether the tool has a real API or only a CSV export, and whether the sync has to go both ways. One-way is roughly half the work of two-way, because two-way means deciding, per field, which system wins when they disagree — and that decision is the expensive part, not the code.
The thirty pages here are the tools we get asked about most often, not the tools we are able to connect. If a system has an API, a webhook, or even just a scheduled export, it can be connected — we have built connections to industry software that has maybe four hundred users in the country. Tell us what you run and we will say honestly whether it is a two-day job or a two-month one.
