This spell isn't available in the Basic Rules, only in the PHB

I cannot believe this spell must be the most expensive cantrip ever. Who would carry around two cursed items worth 150g each, just for the off chance to repair a "broken chain link, two halves of a broken key, a torn cloak, or a leaking wineskin" ... make no sense. Why should it require two wondrous items to cast? Two loadstones?

https://www.dndbeyond.com/magic-items/loadstone

I think they should eliminate the material component of this spell. Hermoine fixed Harry's glasses with verbal and somatic with focus only.

Keep in mind that a lodestone is a naturally occurring magnet, the loadstone you linked is probably a different item completely. Also, the material components used in a spell are considered covered by a component pouch or focus unless a gold value is assigned, in which case you'd need to buy the component. I.e. Identify requires a golden pearl worth 100gp.

Loadstone vs. Lodestone.  The component for the spell is the "Lode" version.  

The "Load" version you linked is a pun.  

Ha.  Ha.  Ha.

Mending + Mage Hand: After each fight, broken arrows pick themselves up, knit back together, and deposit themselves in the archer's quiver.

Keep your hair after a hair cut. Just ball it up and keep it in a pouch. If you want to have long hair again, pull out the old hair and cast Mending.

Could mending be used to fix one of the Tiny clockwork devices a rock gnome can make rather than spending the hour required each night? Don't see why not.

Can mending remove ink from a page?  They were talking about using it this way on Critical Role.

I would say you could plausibly talk a DM into allowing it, but it would take far too long. At best, it would take 1 minute to erase each letter. At worst, 1 minute per stroke/dot. It would only work if the writing was considered damaging to the paper, but mending can only repair one damaged section at a time. It is possibly faster if the writing is magical and tearing the writing would dispell it, mending the paper would repair only the paper and not the magical writing. I would personally recommend burning the paper to destroy the evidence. Washing the ink off and then using something like prestidigitation to dry it out would also work. For subterfuge-related tasks mending is better suited to things like repairing the hole you carved into a door in order to unlock it, or perfectly recreating the wax seal on the top secret letter that you were entrusted with and/or stole from a noble. In both cases there would be absolutely no evidence that you had tampered with anything because it "leaves no trace of the former damage".

The writing isn’t magical. The book isn’t magical. Why do people always make this jump? It’s not a spell scroll it’s just spell instructions. 

Magical versions could exist but then what properties would they have? Default they are not. 

@GHSkub LODEstones, not LOADstone. A lodestone is just a naturally ocurring magnet. Id price them at a silver coin each.

I dislike the one minute casting time. In that time most things can be glued or sewn together. The only advantage of the spell is that you cant see that it was repaired, but with one minute per break/tear, a shattered vase would take HOURS to repair.

If it had a casting time of one action it would be worth picking over a damage cantrip and a sewing kit and bottle of glue.

Could you enchant something with this spell so you had, say, a pair of pants that just auto repaired any rips, tears or holes that appeared in it or something like that?

Would Mending be able to repair damage to weapons or armor from the corrosion of ooze-type monsters?

Quote from golw >>

Would Mending be able to repair damage to weapons or armor from the corrosion of ooze-type monsters?

 Yes, but it would take a while, because it can only fix a single, less than 1ft break every minute

Could mending repair the damage done by a rust monster?

I wouldn't say it would repair corrosion or rust, it specifically states a break or tear. A broken sword can be put back together, sure. But not a rusty one.

I have misused this so much....

I think a wish could work like a Mending spell.

would depend on how many components are broken unless you want to spend that whole time doing it to each individual component.

Casting spell word is:

Correctus Wonderium