Read-Only Multicall Aggregator

WHAT IT DOES

Read-Only Multicall Aggregator is a developer-focused tool that aggregates multiple read-only contract calls into a single multicall batch for efficient querying. It accepts contract ABIs, addresses, function names, and parameters from the user, then encodes each function call into calldata. The tool uses a chain-specific multicall contract (from a built-in registry) to execute all calls in a single RPC request via tryAggregate, which returns both success/failure status and return data for each call. The results are decoded using the provided ABI and displayed per call, showing success status, decoded return values, or revert errors. This enables developers to query multiple contract states efficiently, reducing RPC round trips and improving performance for dashboard applications and batch state checks.

HOW TO USE

Connect your wallet to the target EVM chain. Paste the contract ABI (JSON format) into the "Contract ABI" text area. Enter the contract address, function name, and parameters as a JSON array. Click "Add to batch" to add the call to the batch. Repeat for multiple calls. Click "Execute multicall" to run the batch. The tool will use the chain-specific multicall contract to execute all calls in a single transaction (read-only). Results are displayed showing each call's success status, decoded return values, or any errors. A summary shows total calls, success count, failure count, and block number.

TECHNICAL NOTE: MULTICALL EXECUTION WITH TRYAGGREGATE

The tool uses the tryAggregate function from the multicall contract, which executes all calls in a single batch and returns success/failure status for each call individually. This allows the tool to continue processing even if some calls revert, providing partial results. The tool automatically detects the multicall contract address for the selected chain from a built-in registry (Ethereum, Polygon, BNB Chain, Arbitrum, Optimism, Avalanche). Each call is encoded using ethers.js ABI encoding based on the provided function definition. After execution, the tool decodes the return data using the function's output types from the ABI, displaying human-readable results. If a call fails, the error is reported without affecting other calls.

WHAT IT CANNOT SEE

The tool cannot execute state-changing calls; it is limited to read-only view and pure functions. It cannot handle calls that require a specific sender address or nonce, as multicall uses a zero address for execution. The tool is limited by the multicall contract's batch size limits; very large batches may exceed gas limits or the contract's call stack limits. It cannot aggregate calls across multiple chains simultaneously. The tool is limited to the accuracy of the provided ABI; incorrect ABIs will produce incorrect results. It cannot decode complex return types (e.g., nested arrays, structs) without proper ABI support. It cannot handle functions with dynamic return types efficiently.

PLEASE NOTE

This tool is designed exclusively for EVM-compatible chains (Ethereum, Polygon, BNB Chain, Arbitrum, Optimism, Avalanche C-Chain, etc.). It does not support non-EVM blockchains. The multicall contracts used are publicly deployed and trusted; always verify the contract address for your chain. This is a read-only tool and does not modify any state or require gas payment. The tool provides no warranty that the multicall execution will succeed; users are responsible for verifying the correctness of their ABIs and parameters.