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Chain iconTransaction Simulation

The new standard

Transact with confidence. Preview how transactions will behave onchain, and keep your assets safe.

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Empower your users to transact with confidence

    Actionable simulationsActionable simulations

    In 2022, more than $5B was lost in crypto scams. With transparent previews, Transaction Simulation ensures transactions will behave as users expect.

    Save gasSave gas

    Simulate a transaction and know if it will revert on chain ahead of time. No more wasting unnecessary gas.

    Control your dataControl your data

    With three products, Asset Changes, Execution Simulation and Bundle Simulation, choose the type of transaction to simulate, and the format and granularity of the preview data.

    Ergonomic accessErgonomic access

    Simulate any transaction with a single method. Compatible with the Alchemy SDK and available on Ethereum, Polygon, Arbitrum, Optimism and Base.

    Educate your usersEducate your users

    Malicious transactions are predicated on opaque smart contracts that most users don't understand. Users deserve predictability and clear previews, 100% of the time.

    input-output-iconComplex inputs, simple outputs

    Other simulation methods, e.g., debug_traceCall, have limited functionality with hard-to-parse outputs. Now, simulate complex transactions and get simple results, such as why transactions will fail and revert.

What you can do

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"Alchemy handled the heavy lifting for us and saved us hundreds of hours of development time. Transaction Simulation allowed us to go-to-market 4 weeks faster!"
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Kartik Patel

Former Head of Protocol, OpenSea

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Custom Webhooks
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Real-time data. Any blockchain event.

Infinite data access, precise filter controls.

Code preview

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curl --request POST \ --url https://dashboard.alchemy.com/api/graphql/variables/variable \ --header 'content-type: application/json'
Token API
Token API
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Token balances and metadata

The token data your users expect, no token list required. Available on all EVM-supported chains.

Code preview

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curl --request POST \ --url https://eth-mainnet.g.alchemy.com/v2/docs-demo \ --header 'accept: application/json' \ --header 'content-type: application/json' \ --data ' { "id": 1, "jsonrpc": "2.0", "method": "alchemy_getTokenBalances", "params": [ "0x95222290DD7278Aa3Ddd389Cc1E1d165CC4BAfe5", "erc20" ] } '
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Account Kit
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A complete account solution

No seed phrase, no gas fees. Bring users onchain in seconds using smart accounts.

Code preview

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const provider = new AlchemyProvider(providerConfig).connect( (rpcClient) => new LightSmartContractAccount({ ...accountConfig, rpcClient, }) ); const { hash } = await provider.sendUserOperation(uo);
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Build blockchain magic with Alchemy

Alchemy combines the most powerful web3 developer products and tools with resources, community and legendary support.