Terms of Service

Last updated: 4 August 2026

Who provides ModTamer

ModTamer is provided by Arturo von Senger, an individual based in Chile. Contact: contact@modtamer.com.

When paid plans become available, purchases will be handled by Paddle acting as merchant of record. That means Paddle is the seller for your purchase, handles the payment, and handles the transaction taxes it is responsible for as merchant of record — VAT, GST, sales tax and the like. Paddle's terms also apply to the transaction. ModTamer remains responsible for its own income, accounting and tax obligations in Chile; those are not yours to worry about, and they are not Paddle's either.

Who can buy

To buy a plan you must be 18, or the age of majority where you live, and able to enter into a contract. If you are younger, ModTamer can still be used — but a parent or guardian has to make the purchase and be responsible for it.

Current status

ModTamer is in development and not yet on sale. The free log analyser on this site works today and is free to use. Everything below about licences, plans and payments describes how it will work when it launches.

What ModTamer is

A desktop tool that diagnoses, repairs, validates and measures modded Minecraft servers (Forge and NeoForge). It works on isolated copies of your server: your original folder is never modified during analysis or testing.

When you explicitly ask it to apply changes to your real server, it takes a backup first, and it writes only mod files inside the mods folder — never your world, your configuration or your server properties. If the backup fails, nothing is applied.

We are aware that stating those three things here turns them into commitments we can be held to, and we are stating them anyway. They are not promises of good behaviour; they are how the program is built, and each one is held in place by automated tests that fail the build if it stops being true. A guarantee nobody checks is a slogan.

One feature is a deliberate exception, and it asks first: measuring what each individual mod costs uses a profiler that uploads its measurements to an external service to make them readable. It will not run unless you accept that, every time. The privacy policy describes exactly what goes and what does not.

What ModTamer does not promise

We would rather lose a sale than make a claim we cannot defend. Specifically:

• We do not promise that any modpack will be stable, bug-free, or free of crashes. What we verify is that a server started successfully under the conditions we tested.
• Performance figures are estimates under a documented scenario. Real player counts depend on your hardware, your world, your network and what players actually do.
• We do not promise universal compatibility. The combinations of loader and Minecraft version we actually test are listed publicly on the home page. Outside them ModTamer may work, but nobody has verified it.
• "Registered" is a fact we can check; "works" is not. ModTamer can confirm that a server knows about a mod's content. Whether a feature behaves correctly in play depends on the game.

Mods belong to their authors

ModTamer does not host or redistribute mods. When you accept a repair or an update, it downloads files from their public source on your behalf, the same way your browser would.

You are responsible for complying with the licences and terms of the mods you install. ModTamer is not affiliated with Mojang, Microsoft, the Forge or NeoForge teams, Modrinth, CurseForge, or any mod author.

Your licence

A licence belongs to one person, and that person may install ModTamer on the number of computers their plan allows. It is non-exclusive and non-transferable.

Yes, you can use it to get paid

If you fix other people's servers for money — as a freelancer, as an admin for a community, as a favour that turned into a job — that is allowed and we want you here. Use it on your own computers, under your own account. What you cannot do is hand your licence to the client, or run ModTamer as a service other people log into.

One licence, one person

The allowance is computers, not people. If two people at a company both use ModTamer, that is two licences, even on one machine. A licence with a two-computer allowance is a desktop and a laptop for the same person, not a shared seat for a team.

Running a hosting business and wanting ModTamer across your customers' servers is a different thing than any of the above, and the plans on this site do not cover it. That is not a "no" — write to contact@modtamer.com and we will work something out.

What counts as a computer

One installation on one machine. Virtual machines count, and they are allowed — testing in disposable environments is half the point of this tool, and forbidding it would be forbidding the job. We identify a machine by an identifier ModTamer generates itself; we do not collect serial numbers from your disks, board or BIOS.

If you change computers, reinstall, or wipe a machine, you release the activation from your account and use it elsewhere. It takes a click, it does not need us, and there is no limit on how often you do it. Getting locked out of software you paid for is the single most infuriating thing about licences, and we would rather lose a little enforcement than do that to you.

What you may not do

• share, resell or publish your licence key;
• circumvent licence checks or plan limits;
• redistribute ModTamer, or bundle it into something you sell.

ModTamer's code stays ours. Buying a plan buys the right to use it, not a copy of it to do what you like with. You keep whatever the law gives you regardless — including, where it applies, the right to study or adapt the software for interoperability, which no clause here takes away.

Working without a connection

ModTamer does the heavy work locally, so it keeps working when our servers do not. The licence is checked periodically, and there is a grace period during which the application continues to work normally without reaching us. An outage on our side is not supposed to stop you from fixing your server.

The exact length of that grace period, and which functions need our servers at all, will be stated here as concrete numbers before anyone can buy. They are not stated today because the licence system is not built, and a number invented now would describe a decision nobody has made.

What we still have to write down

Being straight about it: this page does not yet answer everything a paid product has to answer. Before ModTamer goes on sale, these will be settled here, not left to interpretation:

• renewal, currency, price changes, what happens when you switch plans, and what a free trial does;
• what happens to your licence and your data if you cancel — or if ModTamer shuts down;
• how to appeal a suspension.

None of it applies while nothing is for sale. Publishing a set of subscription terms before there is a subscription would be filling the page with text nobody has decided is true.

Your responsibilities

ModTamer changes files on servers you control. Although it works on copies and takes a backup before applying anything, you should keep your own backups. Software fails, disks fail, and a tool that touches your files is not a substitute for your own copy.

Suspension

We may suspend a licence that is being shared publicly, used to attack our services, or used in a way that breaks the law. Where the situation allows it, we will tell you first and give you a chance to fix it.

Liability

ModTamer is provided "as is". To the extent the law allows, we are not liable for indirect or consequential loss, or for lost profits, lost revenue or lost opportunity; and our total liability for anything else is limited to the amount paid for ModTamer through Paddle in the twelve months before the claim.

That says "through Paddle" and not "to us" on purpose: Paddle is the seller of your purchase, so you never pay us directly. A clause measuring a limit against money you never sent us would be a clause measuring nothing.

That limit has holes in it on purpose. It does not apply to fraud, to deliberate wrongdoing, to gross negligence, to death or personal injury, or to anything else the law does not let us limit. And it does not take away a consumer's right to have a faulty digital product repaired, replaced, reduced in price or refunded where the law provides it — the fourteen-day guarantee on the refunds page is in addition to those rights, not instead of them.

Ending the agreement

You can cancel at any time. See the refund and cancellation policy.

Governing law

These terms are governed by the laws of Chile. If you are a consumer, this does not deprive you of the protection of the mandatory rules of the country where you live.

Changes

We may update these terms. If a change materially affects your rights and we have your email, we will tell you before it takes effect.