Solana Jito Bundle & Token Launch Safety Checker

What Is a Solana Bundle?

On Solana, a bundle is a group of token buys from several wallets that land together, in the same slot or even the same transaction, right when a token launches. A slot is Solana’s block time of roughly 400 milliseconds. No group of strangers can react to a brand-new token and all land their buys in the same 0.4-second window. When 5, 10 or 20 fresh wallets do exactly that, it’s almost always one person or team buying with many wallets.

Why would a creator do that? Spreading a big buy over many wallets makes the holder list look healthy and decentralised. It hides how much supply one party controls, and it lets insiders buy at the lowest price before anyone else can. Later they can sell from many wallets at once, or bit by bit, so the dumping is harder to spot. That’s why “bundled” has become one of the main warning signs traders check on Solana meme coins.

Not every bundle is malicious. Some creators bundle to beat sniper bots that would otherwise buy the launch. Trench, which popularised bundle scanning, points out that two wallets buying under about 2% in the same slot is often just copy-trading or a multi-wallet trading platform. The size, the number of wallets and what they still hold tell you far more than the word “bundled” alone.

How to Check a Solana Token for Bundled Transactions

1. Copy the contract address. Get it from the token’s Pump.fun page, Solscan, Birdeye, DexScreener or GMGN. It’s the mint address. Pump.fun mints usually end in “pump”. Scam copies often share a ticker, so always copy the address, never search by name.
2. Paste it into the checker and press Check bundles. You can paste a full link and the address is pulled out for you.
3. Read the risk score and its reasons. Every point on the score is explained, so you can see whether it comes from bundles, the creator, authorities or holder concentration.
4. Compare “Bundled at launch” with “Bundles still hold”. The first number is history. The second is the risk that exists today.
5. Open the wallet table. Look for groups of wallets buying similar amounts in the same slot, wallets that paid Jito tips, and which ones are “Still holding”.
6. Cross-check the biggest wallets. Use the Solscan and Bubblemaps links to see whether they were funded by the same wallet or passed tokens to new wallets.

What Is a Jito Bundle on Solana?

Jito runs a modified Solana validator client and a “block engine” used by most of the network’s stake. Through it, anyone can send a bundle: a list of up to five transactions that are executed in order and all-or-nothing. Either every transaction lands in the same slot in the exact order given, or none of them lands. To get a bundle included, the sender pays a tip in SOL to one of eight Jito tip accounts. Jito’s documentation sets the minimum tip at 1,000 lamports.

That makes Jito bundles ideal for launch bundling. A creator can put the token creation transaction first and the buy transactions from their other wallets right behind it. Their wallets are then guaranteed to buy first, at the lowest price, before any sniper or regular trader. Each transaction can also carry buy instructions from more than one wallet, so a single Jito bundle can cover many wallets.

Jito bundles also have normal uses. Traders use them for MEV protection and to land transactions reliably when the network is busy, and bots use them for arbitrage. So a Jito tip on its own doesn’t prove wrongdoing. This checker lists Jito tips in the launch window as a supporting signal. It adds only 3 points to the score, and the weight goes to how much supply bundled wallets bought and still hold.

How Solana Bundle Detection Works

This checker uses standard Solana RPC methods, the same data Solscan shows, and runs these steps in your browser:

Pools and bonding curves are recognised by their behaviour. They are accounts that send tokens out without signing the transaction, because a program controls them. This matters because a Pump.fun bonding curve starts out holding most of the supply. Counting it as a “holder” would make every new token look dangerously concentrated.

Limits you should know: tokens with more than 25,000 transactions skip the launch trace because it takes too long in a browser. Swaps through some older AMMs don’t reference the mint, so a few buys on tokens launched straight onto Raydium may be missed. And wallets that moved tokens to a new address show as “Sold all”. None of these limits can make the checker invent a bundle. They can only make it miss one.

How to Identify Bundled Token Buys

Beyond the same-slot test, these patterns point to one party behind a group of “different” buyers:

• Same slot, similar size. Several buys of nearly the same token amount or SOL value within one slot is the classic pattern.
• Buys in the creation slot. Buying in the same slot the token was created needs advance knowledge of the launch. Only the creator, or bots paid to be ready, can do that.
• Jito tips next to the buys. A tip paid in the launch slot shows the buys were sent as a Jito bundle.
• Fresh wallets funded minutes earlier. Wallets with no history, funded from one source or from the creator shortly before launch, are the strongest off-slot evidence. Check the “funded by” field on Solscan, or the links on Bubblemaps.
• Selling in sync. Bundled wallets often sell together, or pass tokens to new wallets at the same time.
• The same pattern across launches. Serial bundlers reuse wallets. If the creator’s past tokens died after a dump, expect the same.

What Does Bundle Percentage Mean?

Bundle percentage is the share of total supply that bundled wallets bought at launch. If bundles bought 150 million tokens of a 1 billion supply, the bundle % is 15%. On its own it’s a history lesson. The number that decides your risk today is how much of that they still hold.

The full score, out of 100, also adds points for bundle size at launch, the number of bundled wallets, what the creator holds, active mint or freeze authority, and top-10 concentration. With the manual calculator, you can also add unlocked liquidity and shared funding. Levels: Low under 20, Moderate 20–39, High 40–64, Critical 65+. Many trading guides use a similar rule of thumb: be careful once bundles or insiders control more than about 10%.

How Many Wallets Are in a Solana Bundle?

Anywhere from 2 to 30 or more. One Jito bundle is capped at five transactions. But each transaction can include buys from several wallets, and a creator can land more than one bundle in the launch slot and the next. Trench’s guide describes stacked bundles of 5–15 wallets each, and one example of 24 wallets holding 76% of supply within 0.4 seconds.

• 2 wallets, small %: often harmless. It may be copy-trading, a bot, or one trader using two wallets.
• 3–4 wallets holding meaningful supply: a red flag according to Trench, and scored as a warning here.
• 5–9 wallets: deliberate coordination. Check what they still hold.
• 10 or more wallets: a professional bundling setup, usually made to look like a crowd of early buyers.

The checker counts every wallet that received tokens in a bundled slot, including the creator if they bought in that slot.

Bundled Wallets and Early Token Holders

Every token has early holders. The question is whether they’re independent. Snipers are bots or traders racing to buy as soon as a token appears. They act independently and usually sell quickly for a small profit. Bundled wallets are controlled by the creator or their group, and hold or sell as one.

The wallet table marks buyers in bundled slots in red, and separately lists single buyers in the next slots of the launch window. Early wallets that later appear in the top holders are labelled Bundled at launch or Launch buyer. That makes it easy to see when “organic” top holders are really launch insiders. If one of those wallets is still among the top holders with a large share, that is the wallet that can end the chart.

The creator deserves a separate look. On Pump.fun the “dev buy” happens inside the creation transaction. A small dev buy that is held is normal. A dev who bought big alongside a bundle, or who still holds 10% or more, is a warning on its own.

How to Check if a Token Was Bundled at Launch

The launch is the first slot where anyone other than the creator’s own mint receives tokens. The checker finds it automatically. By default it includes the two slots after launch (about 1.2 seconds), where the second wave of bundled buys often lands. You can change that with Launch window:

• Launch slot only: the strictest view. It only catches buys that landed with the creation.
• +2 slots (default): the best balance for most tokens.
• +5 or +10 slots: catches slower, spread-out bundles, but also pulls in more independent snipers.

To check by hand on Solscan, open the token, go to the transfers or activity tab, sort by oldest, and look at the slot or block numbers. Several different wallets receiving the token in the same block as the creation is a bundle. The checker does the same thing and also works out the % of supply and current balances for you.

Solana Bundle Checker for Pump.fun Tokens

Most bundled launches today happen on Pump.fun. Every Pump.fun token has a fixed 1 billion supply with 6 decimals. It starts on a bonding curve, where the price rises with each buy, and about 800 million tokens are sold through the curve. When the curve’s market cap reaches the graduation threshold (historically around $69,000; the threshold is set in SOL, so the dollar figure moves with the SOL price), the curve closes. Its liquidity then moves to PumpSwap, Pump.fun’s own AMM, where the pool is owned by the protocol. Only a small fraction of Pump.fun tokens ever graduate.

Pump.fun tokens are created with mint and freeze authority revoked, and liquidity can’t be pulled by the dev. The usual rug risks are gone, so bundles and holder concentration are the main risk left. On a bonding curve, buying first is buying cheapest. Bundlers put their buys right behind the creation transaction to get the lowest price, then sell into later buyers. Selling into the curve pushes the price back down, so a bundle holding 20% can erase most of the curve’s progress.

• The checker recognises the bonding curve and excludes it from bundle and top-10 figures. Before any sell, a curve holding more than 20% of supply is marked Likely curve / pool.
• Graduated tokens have a PumpSwap pool. Pools are also excluded from concentration figures.
• Run the check before graduation if you can. That is when bundlers most often sell into late buyers.

Historical Bundle Holdings vs. Current Holdings

These two numbers answer different questions, and mixing them up is the most common mistake.

Trench gives an example of why they differ. A dev can bundle 10%, sell it, and bundle another 10%. That shows 20% bundled in total, but only 10% held. The reverse matters too. If bundles bought 40% and now hold 2%, most of the damage has already happened. The remaining risk comes from whoever holds the supply now.

One caution: this checker reads each early wallet’s current balance. If a bundler moved tokens to fresh wallets, the old wallet shows “Sold all” while the new wallets hold the supply. Check the top holders list and a bubble map for large holders with no launch history.

Solana Bundle Checker FAQs

Resources and Sources

• Trench: Bundle Scanner GuideHow bundles are defined, total vs held %, and red-flag examples.
• Jito Docs: Low Latency Transaction SendBundles, the five-transaction limit, atomic execution and tips.
• Solana Cookbook: MEV protection with JitoTip accounts, the 1,000-lamport minimum and sandwich protection.
• Pump.fun Docs: The bonding curveHow pricing works and migration of liquidity to PumpSwap.
• Solana RPC: getSignaturesForAddressThe method used to walk back to a token’s launch.
• Solana RPC: getTokenLargestAccountsThe method behind the top-holders list.
• Solana Docs: Clusters and public RPC limitsWhy public RPC scans can be rate-limited.
• BingX Learn: Using a Solana bundle checkerA trader-focused walk-through and concentration rule of thumb.

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Last reviewed: September 2026.