Ad space
A banner on your site becomes a slot. Whoever values the attention most holds it, and the rent lands in your split instead of an ad network's.
Running on Base today via Adland.
Partial common ownership · Base
Propertyyou cannothoard
Name your price. Pay tax on it. Anyone can buy it from you at that price, any time.
That is the entire protocol. No auctions to win, no renewals to miss, no seat held by someone who stopped caring.
Slot 040x5678…Ef01
anyone can buy at this
1.50WETH
market
- Tax / month
- 0.0600
- to the recipient
- Deposit lasts
- 4 mo
- until Nov 28, 2026
Solvency0.25 WETH deposited
Buyer's discountmarket ≈ 2.40
Priced 0.90 WETH under market. Someone will take it.
Illustrative figures. Drag the price, then take the slot from its occupant — that is the only way anyone ever gets one.
The name is not a metaphor
You already know what a slot is
Four industries that share nothing else reached for the same word, because underneath it is the same object: one scarce position, and a queue of people who want it.
- Heathrow
- A landing slot
- Worth enough that airlines have flown empty planes rather than give one up.
- Television
- The eight o'clock slot
- Sold to whoever can draw the most people to it.
- Supermarkets
- A shelf slot
- Eye level goes to the brand that pays for eye level.
- Motherboards
- An expansion slot
- A standard opening — anything built to the spec drops straight in.
Every one of them is held by whoever was chosen last, and usually kept long after the choosing stopped making sense. Someone has to review it, renew it, or take it away — a committee, a landlord, a sales team.
0xSlots makes the position a contract instead, so the choosing never stops and nobody has to run it.
An empty slot already works.The module is what you slot in.
Every slot, out of the box
Deploy one with no module at all and it still does the work.
- Prices itself, continuously and honestly
- Streams its tax to a recipient you choose
- Names a current holder anyone can verify
- Cannot be captured for good, by anyone
That alone is enough for sponsorship, patronage, or any title somebody has to keep paying to keep.
What a module adds
Bolt one on and holding the slot starts granting something too.
- Ad space
- A live feed
- Access to something gated
- A vote, a cut, a name
Filled cells ship today. The interface is open, so the interesting ones are the ones nobody has written yet.
How a slot changes hands
It never stops
Every slot runs the same four steps, forever, with no administrator and nobody to appeal to.
- 01
Claim
Pay the occupant their asking price and post a deposit. The slot is yours in the same transaction.
- 02
Assess
Declare what the slot is worth to you. The number is public, and it is binding.
- 03
Pay
Tax streams out of your deposit continuously, straight to the slot's recipient. Nobody sends an invoice.
- 04
Release
Someone meets your price, or your deposit empties and anyone can liquidate you for a bounty.
Step 04 is step 01 for somebody else
What you are deploying
No surprises in the contract
A slot is a small, finished thing. Here is all of it.
- Ownership
- Harberger tax — partial common ownership. Always for sale.
- Currency
- Any ERC-20, chosen per slot. No wrapping, no protocol token.
- Tax goes to
- Any address you name — most often a 0xSplits split, so the revenue fans out to a group.
- Terms
- Tax rate and behaviour are set at deployment and immutable by default. Make them mutable only if you deliberately want a manager.
- Behaviour
- A slot prices itself and forwards its tax with no module at all. The module slotted in decides what else holding one grants — metadata and feeds today, anything you write next.
- Liquidation
- Permissionless. When a deposit runs dry, anyone can liquidate the occupant and keep the bounty.
- Deposits
- Each slot sets a minimum, denominated in seconds of tax coverage rather than a flat amount.
- Networks
- Base and Base Sepolia.
Where this is worth doing
Anything scarce and neglected
A slot earns its keep wherever a position is limited, valuable, and currently held by whoever got there first.
Names and handles
Squatting stops paying the moment holding costs money. A name nobody is using drifts to somebody who will.
No module written yet.
Seats and listings
Curator seats, directory placements, a spot on a leaderboard — any scarce position that currently gets handed out and then forgotten.
No module written yet.
Deploy one in a single transaction
Put something up for permanent auction
Pick a currency, name a tax rate, point the revenue at an address. The slot handles the rest, forever, without you.