Create a Liquidity Pool on Base

Pick Uniswap v2, v3 or v4, supply your ERC-20 address, choose ETH or USDC as the other half of the pair, and decide how much of each goes in. Those two figures are what fixes the starting price. Approve one transaction and the pool exists, funded, with your opening buy already executed if you asked for one. If the token itself does not exist yet, create one on Base first.

This tool builds Uniswap pools on Base and lets you pick v2, v3 or v4. You can also open one through Uniswap's own interface, which costs nothing beyond gas but leaves the approval, the opening price and your first buy as separate steps you sequence yourself. Base carries other exchanges as well, and nothing stops a token trading on more than one, but pools outside Uniswap are not something this tool creates.

ETH is the default and the one the opening buy works with. USDC is worth choosing when you want the price quoted in dollars from the start. One thing to watch: Base has two tokens that look like USDC. The canonical one issued by Circle is USD Coin at 0x8335...2913, and that is what this tool pairs against. The other, USDbC at 0xd9aA...b6CA, is the older bridged version, and a pool built on it is harder for routers and screeners to find. If you have seen both in a wallet list, that is why.

Two piles of tokens sitting in a smart contract, priced against each other by how much of each is there. On a decentralized exchange people buy and sell against those piles rather than against another trader, which is what lets a brand new token trade at all. Whoever puts the tokens in is a liquidity provider and takes a cut of every swap in return.

0.002 ETH to Tokenry, and Base network fees on top, which for pool creation generally land in the range of a few cents. Uniswap asks nothing for opening a pool on any version. The tokens you put in are not a cost at all, they are your liquidity and you keep the claim on them unless you burn or lock the position.

Swap fees are the income, split across providers by how much of the pool each one owns. Since Uniswap's UNIfication vote in December 2025 turned the protocol fee on, a v2 pool's 0.3% is really 0.25% to providers and 0.05% to the protocol, and a v3 pool at 0.3% or 1% hands a sixth over. Being the only provider at launch means all of that early flow is yours. Whether it comes out ahead of simply holding the two tokens is a question of volume versus how far the price travels.

Three things can cost you money. The pool rebalances against you as the price moves, which is impermanent loss. Both assets you deposited stay exposed to the market. And you are trusting the contracts, which for Uniswap is about as well-tested as DeFi gets, though the token you pair is your own responsibility entirely. Burning or locking adds a fourth: those choices are one-way.

Think about your initial liquidity in terms of price impact rather than a target number. Whatever sits on the ETH or USDC side is what a buyer spends against, and a thin side means a modest trade shifts the price a long way, which shows up on the chart as a spike and reads as a pool nobody should touch. No minimum is enforced anywhere. Provide liquidity you can leave alone, since taking it back out later moves the price and anyone can see you do it.

A v2 pool quotes every price from zero to infinity, which needs no attention afterwards. A v3 pool packs the same money into a band you nominate, so it earns harder while trading happens inside the band and earns nothing once the price leaves. A v4 pool behaves like v3 but registers inside Uniswap's shared PoolManager, so opening one is far cheaper, and it supports a lock that keeps paying. For a first pool on Base, v2 or a full-width v3 is the uncomplicated answer.

Base is unusual here. Most chains enable four v3 tiers, but Base's factory has seven: 0.01%, 0.02%, 0.03%, 0.04%, 0.05%, 0.3% and 1%. The three extra low tiers exist for stablecoin and tightly correlated pairs, and this tool offers the four that are relevant to a new token. Those usually sit at 0.3%, moving to 1% when the pair is thin or jumpy enough that traders should be paying more for the privilege. v4 is not tiered at all, since the protocol accepts any fee, so the choices offered there are our shortlist rather than a Uniswap rule. Whatever you pick is locked in once the pool exists.

Yes, and it happens inside the launch transaction rather than after it. Base works differently from Ethereum here and it is worth understanding why that matters. Base runs a single sequencer with no public pending-transaction pool, so nobody can watch your launch arriving and jump in front of it. What bots do instead is react: they watch for the pool-creation event and buy in the next block, which on Base arrives in a fraction of a second. An opening buy carried inside the creation transaction is therefore the only purchase guaranteed to be first, because everything else is reacting to an event that has already happened. It works on ETH-paired pools and the tokens go to the wallet you signed with.

Burning throws the LP tokens or position NFT into a dead address so nobody can pull the liquidity, but on v3 that also strands the fees the position will earn. The v4 route is different: a small forwarder contract from Uniswap's liquidity launcher takes custody of the position, deployed just for your pool, and while nobody can ever withdraw it, the fees route back to you. Both are permanent, both are switched off unless you turn them on, and both make you confirm you understand that.

As soon as the transaction lands. Uniswap's interface will route to it straight away, and aggregators pick it up shortly after. Charts on DexScreener and similar sites need at least one trade to exist, which your opening buy supplies. There is no review queue and nobody to ask.

Rarely. Anything minted through Tokenry supports permit, which turns the approval into a signature that costs nothing. Wallets with Uniswap history can go through Permit2 for other tokens. A plain approval transaction is only needed for tokens supporting neither, and you will be told up front if yours is one.

Route it to v2. That path sends your tokens directly into the pair, so any owner exemption in your contract still counts, and if the contract skims anyway the ETH side gets adjusted so the price you intended survives. v3 and v4 both check that the amount they were promised is the amount that arrived, and refuse the deposit when it is not, so a taxing token cannot open a pool there unless the launcher is exempted first.

You will be joining it rather than creating a rival. A v2 deposit is trimmed to match the ratio already in place and the leftover comes back to you; on v3 and v4 your position is opened at whatever price the pool currently holds. Choosing another fee tier, or swapping ETH for USDC, is how you open a genuinely new market instead.

As long as you did not burn or lock it, yes. Add liquidity puts more in, and remove liquidity pulls out any fraction between 1% and 100%, handing back both assets along with whatever fees a v3 or v4 position has banked.