Remotely fetch smart contract ABI as JSON to use with wagmi and ethers.js in your app.

How do I use this API?

Append the contract address after abidata.net and optionally pass a network param, that’s it. You don’t need any API keys.

Which networks are supported?

Name	Network ID
Ethereum Mainnet	none (default)
Ethereum Goerli Testnet	goerli
Ethereum Sepolia Testnet	sepolia
Avalanche Mainnet	avalanche
Avalanche Fuji Testnet	avalancheFuji
Arbitrum Mainnet	arbitrum
Arbitrum Goerli Testnet	arbitrumGoerli
Arbitrum Nova	arbitrumNova
Base Mainnet	base
Base Goerli Testnet	baseGoerli
BSC Mainnet	bsc
BSC Testnet	bscTestnet
Fantom Mainnet	fantom
Fantom Testnet	fantomTestnet
Polygon Mainnet	polygon
Polygon Mumbai Testnet	polygonMumbai
Polygon zkEVM Mainnet	polygonZkEvm
Polygon zkEVM Testnet	polygonZkEvmTestnet
Optimism Mainnet	optimism
Optimism Goerli Testnet	optimismGoerli
Gnosis Mainnet	gnosis

Example:

https://abidata.net/<contract_address>?network=<network_id>

abidata.net/0xBB9bc244D798123fDe783fCc1C72d3Bb8C189413abidata.net/0x9a879320A9F7ad2BBb02063d67baF5551D6BD8B0?network=goerliabidata.net/0x779877a7b0d9e8603169ddbd7836e478b4624789?network=sepolia

React usage Example:

import { useState, useEffect } from 'react';
import { useContractWrite, usePrepareContractWrite } from 'wagmi';

const contractAddress = "0xecb504d39723b0be0e3a9aa33d646642d1051ee1";

const useContractABI = (contractAddress) => {
  const [contractABI, setContractABI] = useState(null);

  useEffect(() => {
    const fetchContractABI = async () => {
      const response = await fetch(`https://abidata.net/${contractAddress}`);
      const json = await response.json();
      setContractABI(json.abi);
    };

    fetchContractABI();
  }, [contractAddress]);

  return contractABI;
};

function App() {
  const contractABI = useContractABI(contractAddress);
  const { config } = usePrepareContractWrite({
    address: contractAddress,
    abi: contractABI,
    functionName: 'feed',
  });

  const { data, isLoading, isSuccess, write } = useContractWrite(config);
 
  return (
    <div>
      <button disabled={!write} onClick={() => write?.()}>
        Feed
      </button>
      {isLoading && <div>Check Wallet</div>}
      {isSuccess && <div>Transaction: {JSON.stringify(data)}</div>}
    </div>
  )
}

Is this free to use?

Yes, it’s free for everyone.

If you wanna support this project send some eth to ens.pug.eth

Can this be used in production?

Yes. Records are cached for 30 days, so after the initial request for a contract, the API will respond very quickly from the CDN.

Is the source code available?

Yes, check it out on GitHub. The main branch is automatically deployed to Vercel.