Build tip. All-Purpose Tool and skills.

The All-Purpose Tool is a great addition to artificers that Tasha gave us. It gives you an extra cantrip from any spell list for eight hours. It increases spell attack and saving throw DC depending on the item’s rarity. But the one that really excites me is that you gain proficiency in any artisan tool with an action. Tools have a lot of uses since Xanathar's Guide to Everything. Each tool give advantage on a skill roll if you have proficiency with both the skill and the tool. The skill check has to related to the tool but you get more details if it does. With the All-Purpose Tool you have proficiency (and expertise at level 6) with seventeen artisan tools and thieves tool. Each artisan tool has a couple of skills that they enhance. The most common of theses skills are history, investigation, arcana, and perception. If you want to be really good at your skill checks I suggest choosing these four skills and getting the All-Purpose Tool. Even the uncommon version helps. 

I’ve considered APT as my third infusion after a weapon and an armor infusion.  It’s pretty great for an Artificer, though perhaps not as useful for others.

Quote from Sisyphus_Rocks >>

I’ve considered APT as my third infusion after a weapon and an armor infusion.  It’s pretty great for an Artificer, though perhaps not as useful for others.

I don't know how exactly you are making an infused item become an All-Purpose Tool, as that is not on the replicate item list that you can do and there is no common version of it.

You’re correct that it’s uncommon and not a listed magic item, so you’d have to get DM approval.  It’s not RAW.  But there are similarly powered items that can be replicated (e.g. Goggles of Night, which are uncommon) even at 2nd level.  So it’s not going to throw off game balance if your DM approves it.

Those are two very different things, Goggles of Night/Darkvision is more for RP purposes, an All Purpose Tool gives you a lot of proficiencies and advantage on a lot of things. It’s like comparing Fire Bolt to Fireball.

You can replicate an Uncommon Wondrous Item such as a +1 All Purpose Tool at level 10. Before then, it is definitely not RAW as a replicated item. You might have as much luck asking your DM to give you/sell you one in world that is not replicated before then. (By level 10 you might be able to talk them into a +2.)  It is definitely an excellent use of one of your attunement slots regardless of how you obtain one.

Quote from FoolishMortal18588 >>

You can replicate an Uncommon Wondrous Item such as a +1 All Purpose Tool at level 10. Before then, it is definitely not RAW as a replicated item. You might have as much luck asking your DM to give you/sell you one in world that is not replicated before then. (By level 10 you might be able to talk them into a +2.)  It is definitely an excellent use of one of your attunement slots regardless of how you obtain one.

It is probably worth pointing out that the people in this thread from five years ago were probably talking about the 5e Artificer, which did not have any way to replicate an All-Purpose Tool at any level.