Show the bookmarks bar
Ctrl + Shift + B on Windows, ⌘ + Shift + B on macOS. The bar appears under the address field.
bookmarklet · sol + evm · live
Snipe the launch.
Snipe the launch.
Not the candle.
j7sniper watches new pairs across 14 venues and fires your preset buy the second liquidity goes live. It runs in the tab you are already on — one bookmarklet, no extension, no background process.
412 msdetect → fill
14venues watched
6chains supported
0extensions installed
Setup
One drag. Then it is always there.
A bookmarklet is a bookmark that runs code in the page you click it on. It installs nothing, asks for nothing, and disappears when the tab does.
Drag the button onto it
Drag Drag to bookmarks up onto the bar. Or copy the build and paste it as the URL of a new bookmark — same result.
Click it on any pair page
Open the venue tab, click the bookmark, and the sniper panel arms over the chart with your preset loaded. Esc closes it.
Features
Built for the four seconds that matter.
Everything in the panel exists to get one order out before the next block, with the numbers you already decided on.
Launch watcher
Tracks new pairs across 14 venues. The moment a pool is live, the panel arms itself on the page you are already watching.
Saved presets
Size, slippage, priority tip and exit ladder stored per chain. Click once and the same numbers fire every time, at 2am as at noon.
Contract guard
Reads mint authority, freeze authority, top-10 concentration and dev share before it lets you fire. Flags sit next to the button, not in a doc.
Exit ladder
Scale out at your marks and trail the rest. After the first fill the stop moves to break-even so a round trip costs you nothing.
Split entries
Fan one entry across up to five addresses so no single wallet shows the whole position on the first candle.
Lives in the tab
No extension, no permissions prompt, no service running in the background. Close the tab and nothing of j7sniper is left on the machine.
Presets
Three starting points. Edit every number.
Defaults are set for a 0.75 SOL book. Copy one, change the size, save it per chain.
| Preset | Entry | Slippage | Priority | Exit ladder | For |
|---|---|---|---|---|---|
| Cold | 0.25 SOL | 8% | 0.0005 | 1.8× / −18% | First fills on a new venue |
| Standard default | 0.75 SOL | 12% | 0.002 | 2.4× / −22% | Most launches, most days |
| Degen | 2.0 SOL | 22% | 0.010 | 2× · 4× · 8× / −35% | Pools that open fast and thin |
FAQ
Asked before every install.
Is this a browser extension? +
No. A bookmarklet is a bookmark holding a snippet of code. It only runs on the tab where you click it, and it cannot read other tabs, history, or anything background. There is no store listing, no update channel, and no permissions dialog because there is no install.
Does it ever see my seed phrase? +
Never. The panel builds the transaction and hands it to your wallet's own signing prompt — Phantom, Solflare, Backpack, MetaMask, Rabby. The signing happens inside the wallet. j7sniper never receives a key, a recovery phrase, or a signature it can reuse.
Which venues and chains? +
Solana: Raydium, Jupiter, Orca, Meteora, Pump. EVM: Uniswap, PancakeSwap, Aerodrome, Base and BSC routers. The watcher covers 14 pools in total, and a chain is only listed once its router and priority-fee path are both tested.
What happens if the fill misses? +
If the price moves past your slippage ceiling the order reverts before it settles and you keep the entry. Nothing is signed twice, and a reverted attempt never shows as a position. The panel tells you which block it lost on.
Does it keep running after I close the tab? +
No. The panel lives in the page. Close the tab and it is gone; there is no daemon, no tray icon, no service. Presets are stored as a bookmark parameter so the next click loads them again.
What does it cost? +
Free while the watcher is in open beta. After that, 0.4% on filled entries only — reverted attempts and cancelled orders are not charged. Network and priority fees go to the chain, not to us.
The next pair is already minting.
Drag the build once. It is on the bar for every launch after.