The easy way to work with the mempool.

Blocknative’s suite of enterprise-grade tools make it easy for builders and traders to add multi-chain mempool data into their Dapp and trading strategies.

Start for free Watch on Uniswap

Join the hundreds of projects that depend on Blocknative.

See Blocknative in action

For Builders

Protect your Web3 protocol and apps — the easy way.

Blocknative's suite of developer tools makes real-time mempool monitoring accessible to every builder.

API & SDK

Easily stream mempool events into your Dapp. Support for ETH, BSC, xDai, and BTC.

Gas Platform

Gas estimation for builders, by builders.

Simulation Platform

Now you can know what will happen next.

Mempool Explorer

Easily create a data stream to monitor and act on transactions in real-time.

Onboard

The easiest way to support all of the top wallets.

Notify

Deliver real-time notifications to your users.

transaction.js
address.js
gas.js

export const getTransaction = (transactionHash) => {

axios.post("https://api.blocknative.com/transaction",

{

apiKey: "key",

hash: transactionHash,

blockchain: "ethereum",

network: "main"

})

.then((response) => {

return (response.data)

})

.catch((error) => {

alert(error)

errorHandler(error)

})

}

USDT-ETH Uniswap

{

"status": "confirmed",

"monitorId": "GETH_1_F_PROD",

"monitorVersion": "0.82.2",

"timePending": "18769",

"blocksPending": 2,

"v": "0x26",

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

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",

API & SDK

Unlock the power of real-time mempool data.

Learn More

Gas Platform

Get into the next block without overpaying.

Learn more

Simulation Platform

Simulate every pending Ethereum transaction.

Learn more

Mempool Explorer

Blockchain events before they happen

Learn more

Onboard

The quick and easy way to add multi-wallet support to your project.

Learn more

1,734.94

Notify

In-line transaction notifications made easy.

Learn more

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",

For Traders

Power your trading strategies with real-time mempool data — the easy way.

Blocknative's global mempool platform constantly captures, normalizes, and enriches in-flight transaction data. So you get unmatched data coverage and sub-transaction resolution for Ethereum, Binance, xDai, and Bitcoin.

Read the docs

Monitor HNY + xDAI on Honeyswap

Easily monitor HNY <> xDAI on Honeyswap with Mempool Explorer.

Launch Mempool Explorer

Monitor USDT + ETH on Uniswap

Easily monitor all USDT <> ETH trades on Uniswap V2 and V3

Launch Mempool Explorer

Monitor wBTC + ETH on Uniswap

Easily monitor all wBTC <> ETH trades on Uniswap V2 or V3 over $500 in value.

Launch Mempool Explorer

Monitor USDC + ETH on Uniswap

Easily monitor all USDC + ETH liquidity pool activity on Uniswap V2 or V3

Launch Mempool Explorer

Monitor HNY + xDAI on Honeyswap

Easily monitor HNY <> xDAI on Honeyswap with Mempool Explorer.

Launch Mempool Explorer

Monitor USDT + ETH on Uniswap

Easily monitor all USDT <> ETH trades on Uniswap V2 and V3

Launch Mempool Explorer

Monitor wBTC + ETH on Uniswap

Easily monitor all wBTC <> ETH trades on Uniswap V2 or V3 over $500 in value.

Launch Mempool Explorer

Monitor USDC + ETH on Uniswap

Easily monitor all USDC + ETH liquidity pool activity on Uniswap V2 or V3

Launch Mempool Explorer

Monitor UNI + ETH on Uniswap

Easily monitor all UNI <> ETH failed transactions on Uniswap V2 or V3

Launch Mempool Explorer

Monitor CAKE on Pancakeswap

Easily monitor all CAKE trades in the Binance mempool

Launch Mempool Explorer

Monitor AAVE+ ETH on Uniswap

Easily monitor all AAVE <> ETH trades over $500 on Uniswap V2 or V3

Launch Mempool Explorer

Monitor LINK + ETH on Uniswap

Easily monitor all LINK <> ETH trades on Uniswap V2 or V3

Launch Mempool Explorer

Monitor UNI + ETH on Uniswap

Easily monitor all UNI <> ETH failed transactions on Uniswap V2 or V3

Launch Mempool Explorer

Monitor CAKE on Pancakeswap

Easily monitor all CAKE trades in the Binance mempool

Launch Mempool Explorer

Monitor AAVE+ ETH on Uniswap

Easily monitor all AAVE <> ETH trades over $500 on Uniswap V2 or V3

Launch Mempool Explorer

Monitor LINK + ETH on Uniswap

Easily monitor all LINK <> ETH trades on Uniswap V2 or V3

Launch Mempool Explorer

What others are

saying

cl Ξ m

@0x_clem

Blocknative introducing a new way to get gas price estimation, using block prediction instead of time estimates.

This could definitely change the way gas price is shown and selected in dApps.

Dan Elitzer 222

@delitzer

If you’re a builder or user of DeFi protocols and you aren’t paying attention to the mempool, you’re flying blind.

Calvin Liu

@cjliu49

@blocknative are masters of the mempool - the most opaque yet critical step in processing a blockchain transaction

Taylor Monahan

@tayvano_

"Check the mempool.”

That Is literally the problem.

Now, before you blow up on me...

Zach Krasner

@zachkrasner

Remember 10 years ago when a package delivery was just a black hole with no info on estimated delivery? That’s where Ethereum gas is today, but @blocknative’s introducing a game changer

Jonathan Alexander

@jalex206

As we've seen in the past week good gas price oracle solutions are critical to the ecosystem, really glad to see this from Blocknative ... OpenZeppelin Defender will include it in its gas price oracle pool

cl Ξ m

@0x_clem

Blocknative introducing a new way to get gas price estimation, using block prediction instead of time estimates.

This could definitely change the way gas price is shown and selected in dApps.

Dan Elitzer 222

@delitzer

If you’re a builder or user of DeFi protocols and you aren’t paying attention to the mempool, you’re flying blind.

Calvin Liu

@cjliu49

@blocknative are masters of the mempool - the most opaque yet critical step in processing a blockchain transaction

Taylor Monahan

@tayvano_

"Check the mempool.”

That Is literally the problem.

Now, before you blow up on me...

Zach Krasner

@zachkrasner

Remember 10 years ago when a package delivery was just a black hole with no info on estimated delivery? That’s where Ethereum gas is today, but @blocknative’s introducing a game changer

Jonathan Alexander

@jalex206

GridPlus

@GridPlus

We can't say enough good things about working with @blocknative and all of the powerful tools they're building!

Onboard.js is an easy way for developers to add mobile and desktop web3 wallet support to their dapp in no time at all.

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For Builders

Join the hundreds of teams building with Blocknative

"Integration with Blocknative was incredibly simple. In two days, we were in production and have not had a single issue since. Now our investors can see the real-time status update of their funding and investment transactions – regardless of whether they’re using MoonPay, Uniswap, or Wyre – and we're able to keep our transaction database in perfect sync with what happens on the blockchain."

Thibauld Favre, CEO

The easy way to work with the mempool.

The most complex part of Web3, made simple.

Protect your Web3 protocol and apps — the easy way.

API & SDK

Gas Platform

Simulation Platform

Mempool Explorer

Onboard

Notify

Power your trading strategies with real-time mempool data — the easy way.

Monitor HNY + xDAI on Honeyswap

Monitor USDT + ETH on Uniswap

Monitor wBTC + ETH on Uniswap

Monitor USDC + ETH on Uniswap

Monitor HNY + xDAI on Honeyswap

Monitor USDT + ETH on Uniswap

Monitor wBTC + ETH on Uniswap

Monitor USDC + ETH on Uniswap

Monitor UNI + ETH on Uniswap

Monitor CAKE on Pancakeswap

Monitor AAVE+ ETH on Uniswap

Monitor LINK + ETH on Uniswap

Monitor UNI + ETH on Uniswap

Monitor CAKE on Pancakeswap

Monitor AAVE+ ETH on Uniswap

Monitor LINK + ETH on Uniswap

What others are saying

cl Ξ m

Dan Elitzer 222

Calvin Liu

Taylor Monahan

Zach Krasner

Jonathan Alexander

cl Ξ m

Dan Elitzer 222

Calvin Liu

Taylor Monahan

Zach Krasner

Jonathan Alexander

GridPlus

New from our blog

ETH Gas 101: An Introduction to Ethereum Gas for Traders and Builders

Blocknative raises $12 million to scale core transaction monitoring infrastructure

Onboard: Support for KeepKey Hardware Wallet

Comparing Ethereum Gas Estimators: How Blocknative Gas Platform Stacks Up

A Builder’s Introduction to the Mempool

Introducing Simulation Platform: A Net-New Capability for the Ethereum Ecosystem

Understanding Ethereum Transaction Simulation — And Why It Matters

Introducing Blocknative Gas Platform: A Fresh Take on Ethereum Gas Price Estimation

How Onboard.js Increases Web3 Signups and Engagement

Ethereum Gas Prices: How the Mempool acts as a Competitive Market for Settlement

How real-time transaction monitoring transforms the NFT experience

Why the Mempool Matters: The Hidden Competition for Confirmation

Blocknative Raises $5 Million to Illuminate the Dark Forest

Introducing Mempool Explorer: Because the Mempool Matters

Introducing Blocknative Commercial Plans

Evidence of Mempool Manipulation on Black Thursday: Hammerbots, Mempool Compression, and Spontaneous Stuck Transactions

From Stablecoins to Crypto Dollars

Now You Can Monitor the Bitcoin Mempool with Blocknative’s Notify API

Deploying Value On-Chain With Gold-Backed NFTs

Easily Support Custom Derivation Paths for Ledger and Trezor Wallets

8 Lessons to Help You Master the Mempool

Does Your Web3 App Support Hardware Wallets?

When One Billion Ethereum Transactions?

DeFi Saver: Making It Easier To Manage DeFi Assets

Internal Transaction Monitoring Is The Missing Puzzle Piece To Understanding Your Smart Contract Activity

A Note On Nodes: Your Gateway To The Mempool

Mastering the Mempool: Your Intro to In-Flight Transactions

A Decentralized Take On Asset Management

Blocknative Year In Review - And What's Ahead

Announcing Onboard.js — Web3 User Onboarding Made Easy

Join the hundreds of teams building with Blocknative

Master the mempool today.

What others are

saying