Blockchain Events Before They Happen

Streaming mempool data made easy.

Build real-time transaction event streams with Mempool Explorer. Fast, flexible, and easy-to-integrate with your projects and trading strategies.

Gain an edge on Ethereum, Polygon, and xDai.

mempool hero image
Join the hundreds of projects that depend on Blocknative
0c731c59-c243-4fba-96fe-35cac794f158-1583450111151 1-1
synthetix_blue_logo 1-1
zapper 1-1
Group 33-1
download (1) 1-1
Bancor_logo_black 1-1
0c731c59-c243-4fba-96fe-35cac794f158-1583450111151 1-1
synthetix_blue_logo 1-1
zapper 1-1
Group 33-1
download (1) 1-1
Bancor_logo_black 1-1

Global mempool events as they happen.
Captured & filtered how you want.

Stack
All the mempool data you need.

Every second, our Platform captures thousands of data points describing in-flight blockchain events. All captured and normalized in a unified, always-on data stream. This provides instant access to every transaction state change, error, & anomaly.

Filter
Filtered exactly how you want it.

Subscribe to any wallet or smart contract address – on mainnet or major testnets. Add ABIs to decode transaction inputs on-the-fly. Then create and combine powerful filters with boolean operators. And get real-time feedback along the way.

Puzzle
Delivered where it needs to be.

Push to production with a single click. Quickly integrate live data streams via native support for webhooks and websockets. Building dynamic blockchain experiences and trading strategies has never been faster – or easier. And don't forget to execute with the best gas price data.

The easiest way to work with public blockchain mempool data.

Build mempool streams on Ethereum, Polygon, and xDai. 

USDT-ETH Uniswap

{

  "status": "confirmed",

  "monitorId": "GETH_1_F_PROD",

     "monitorVersion": "0.82.2",

  "timePending": "18769",

  "blocksPending": 2,

  "pendingTimeStamp": "2021-04-29T16:43:07.754Z",

  "pendingBlockNumber": 12336509,

  "hash":
"0x85a508acceb3cc21b129affa3c47d8ab7aebf9dbaade58ff802d2239d5f9d46c",

  "from": "0x977A553DCf6025C876375706F2B98818414910dA",

  "to": "0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D",

  "value": "0",

  "gas": 197838,

  "gasPrice": "104000000000",

  "gasPriceGwei": 104,

  "nonce": 2148,

  "blockHash": "0x931e057c93e8b752fb2f2c35aa144bd8e1442000db923edc381360cf02a8d8fe",

  "blockNumber": 12336511,

  "transactionIndex": 49,

  "v": "0x26",

 "r":"0x6a87323ebea105a7f2e8311294aea718a185f9f6d264c1f3b1f61082c4666076",
"s": "0x32511db119370e26893135d1e87e2cb2fdfe524aca4e8edb795ffdf3c353fc6f",

Go hands-on with Mempool Explorer by starting with pre-made mempool streams or combine subscriptions and filters to get the exact data you need.

Start for free
Group 42 (1) Group 43
Monitor HNY + WXDAI on Honeyswap

USD Coin (USDC) is a reserve backed stablecoin that runs on the Ethereum blockchain.

Group 42 (2) Group 43 (1)
Monitor USDT + ETH on Uniswap

USD Coin (USDC) is a reserve backed stablecoin that runs on the Ethereum blockchain.

Page 1 Group 43 (1)
Monitor USDT + ETH on Uniswap

USD Coin (USDC) is a reserve backed stablecoin that runs on the Ethereum blockchain.

Group 42 (1)-1 Group 43 (1)
Monitor USDC + ETH on SushiSwap

USD Coin (USDC) is a reserve backed stablecoin that runs on the Ethereum blockchain.

Group 42 (1) Group 43
Monitor HNY + WXDAI on Honeyswap

USD Coin (USDC) is a reserve backed stablecoin that runs on the Ethereum blockchain.

Group 42 (2) Group 43 (1)
Monitor USDT + ETH on Uniswap

USD Coin (USDC) is a reserve backed stablecoin that runs on the Ethereum blockchain.

Page 1 Group 43 (1)
Monitor USDT + ETH on Uniswap

USD Coin (USDC) is a reserve backed stablecoin that runs on the Ethereum blockchain.

Group 42 (1)-1 Group 43 (1)
Monitor USDC + ETH on SushiSwap

USD Coin (USDC) is a reserve backed stablecoin that runs on the Ethereum blockchain.

Group 43 (1) Group 43 (1)
Monitor USDC + ETH on Uniswap

USD Coin (USDC) is a reserve backed stablecoin that runs on the Ethereum blockchain.

Group 42 (5) Group 43 (1)
Monitor UNI + ETH on Uniswap

USD Coin (USDC) is a reserve backed stablecoin that runs on the Ethereum blockchain.

Group 42 (3) Group 43 (1)
Monitor UNI + ETH on Uniswap

USD Coin (USDC) is a reserve backed stablecoin that runs on the Ethereum blockchain.

Group 42 (4) Group 43 (1)
Monitor LINK + ETH on UniSwap

USD Coin (USDC) is a reserve backed stablecoin that runs on the Ethereum blockchain.

Group 43 (1) Group 43 (1)
Monitor USDC + ETH on Uniswap

USD Coin (USDC) is a reserve backed stablecoin that runs on the Ethereum blockchain.

Group 42 (5) Group 43 (1)
Monitor UNI + ETH on Uniswap

USD Coin (USDC) is a reserve backed stablecoin that runs on the Ethereum blockchain.

Group 42 (3) Group 43 (1)
Monitor UNI + ETH on Uniswap

USD Coin (USDC) is a reserve backed stablecoin that runs on the Ethereum blockchain.

Group 42 (4) Group 43 (1)
Monitor LINK + ETH on UniSwap

USD Coin (USDC) is a reserve backed stablecoin that runs on the Ethereum blockchain.

New from our blog

Article
Blocknative Gas Estimator Extension Now Supports Multiple Blockchains!
Big News: Blocknative Gas Estimator Extension Now Supports Multiple Blockchains! We're super ...
blocknative favicon
Blocknative
Article
Understanding Blocknative's Gas Estimator: Why Do Some Predictions Show the Same Values?
Understanding Blocknative's Gas Estimator: Why Do Some Predictions Show the Same Values? If ...
blocknative favicon
Blocknative
Article
Base 101: How Gas Works On Base
Incubated and developed by the popular centralized exchange Coinbase, Base is an Ethereum Layer ...
blocknative favicon
Blocknative
Article
Optimism 101: How Gas Works on Optimism
Optimism is an Ethereum Layer (L2) scaling network. It differentiates itself by increasing ...
blocknative favicon
Blocknative
Article
Sei 101: How Gas Fees Work on Sei
Sei is the first parallelized EVM chain, which combines the advantages of Ethereum and Solana. ...
blocknative favicon
Blocknative
Article
From Public To Private Transactions In Ethereum: The Flippening
Over the past year, Ethereum has seen a dramatic rise in private transaction order flow. New ...
blocknative favicon
Blocknative
Article
How Self-Built Blocks Unintentionally Introduce Base Fee Volatility
Thank You to Toni Wahrstätter, Justin Drake, Barnabé Monnot, Julian Ma and others who ...
blocknative favicon
Blocknative
Article
No More Decoding Headaches: Announcing The Blocknative Decoding API
For builders working with Layer 2 (L2) solutions, one challenge has consistently slowed ...
blocknative favicon
Blocknative
Article
Blob Inversion: An Investigation Into the June 20th 2024 Blob Spike
Thank you to all those who provided input and review on this piece, including Julian Ma, ...
blocknative favicon
Blocknative
Article
Ethereum's EIP 4844 Dencun Upgrade: A 85-Day Analysis
Ethereum's EIP 4844 Dencun Upgrade: An 85-Day Analysis Ethereum's EIP 4844, part of the Dencun ...
blocknative favicon
Blocknative
Article
How to Unstuck a Transaction with MetaMask: A Step-by-Step Guide
A stuck transaction is a transaction that you submitted to go on-chain but it is unable to be ...
blocknative favicon
Blocknative
Article
What is a Stuck Transaction?
Understanding Stuck Transactions In the world of blockchain technology, transactions are the ...
blocknative favicon
Blocknative
Article
Web3 Onboard Supports Coinbase Smart Wallet from Day One
Web3 Onboard Supports Coinbase Smart Wallet We are thrilled to announce that Web3 Onboard now ...
blocknative favicon
Blocknative
Article
What L2's Need To Know About Accounting for L1 Gas Fees
What L2's Need To Know About Accounting for L1 Gas Fees In a recent webinar hosted by ...
blocknative favicon
Blocknative
Article
Announcing WAGMI Support in Web3 Onboard: Elevating Your Dapp's Wallet Experience
We are excited to announce that Web3 Onboard now supports WAGMI, further enhancing the wallet ...
blocknative favicon
Blocknative

What others are saying:

Vector
blocknative are masters of the mempool - the most opaque yet critical step in processing a blockchain transaction
2*KHATfyzZqZjQdzTKq1dIkA
Calvin Liu
@cjliu49
Vector

Their Mempool Explorer is a flashlight for Etherem's dark forest, and at GridPlus we've had a fantastic experience working with them on our Onboard integration!

WThixuAc_400x400
Justin Leroux
@0xMidnight
Vector

Thanks to @blocknative, Ethereum now has it's own Mempool explorer! The infrastructure supporting Ethereum is maturing! Teams can now get notifications in their Slack/Discord about contract events, even before the transaction gets included!

QUaMnVun_400x400
DavidHoffman.eth
@TrustlessState

Connect with us. Build with us.

We love to connect with teams who are building with Blocknative. Tell us about your team and what you would like to learn.

"After first building our own infrastructure, we appreciate that mempool management is a difficult, expensive problem to solve at scale. That's why we partner with Blocknative to power the transaction notifications in our next-generation wallet."

Vitor Py Founder and CTO at Pillar Wallet

Schedule a demo