Accounts

Get Ether Balance for a Single Address

Returns the Ether balance of a given address.

https://api.basescan.org/api
   ?module=account
   &action=balance
   &address=0xde0b295669a9fd93d5f28d9ec85e40f4cb697bae
   &tag=latest
   &apikey=YourApiKeyToken

Try this endpoint in your browser 🔗

Request

Query Parameters

Parameter	Description
address	the string representing the address to check for balance
tag	the string pre-defined block parameter, either earliest, pending or latest

Response

Sample response

{
   "status":"1",
   "message":"OK",
   "result":"1000000000000000" 
}

📖 Tip: The result is returned in wei.

Convert Ethereum units using our Unit Converter.

Get Ether Balance for Multiple Addresses in a Single Call

Returns the balance of the accounts from a list of addresses.

https://api.basescan.org/api
   ?module=account
   &action=balancemulti
   &address=0x449E1f27Af28b603bDcf3D13d46d68090723536b,0xB8FF877ed78Ba520Ece21B1de7843A8a57cA47Cb,0x198ef1ec325a96cc354c7266a038be8b5c558f67
   &tag=latest
   &apikey=YourApiKeyToken

Try this endpoint in your browser 🔗

Request

Query Parameters

Parameter	Description
address	the strings representing the addresses to check for balance, separated by , up to 20 addresses per call
tag	the integer pre-defined block parameter, either earliest, pending or latest

Response

Sample Response

{
   "status":"1",
   "message":"OK",
   "result":[
      {
         "account":"0x449E1f27Af28b603bDcf3D13d46d68090723536b",
         "balance":"7147856994619854"
      },
      {
         "account":"0xB8FF877ed78Ba520Ece21B1de7843A8a57cA47Cb",
         "balance":"7441490536986433596"
      },
      {
         "account":"0x198ef1ec325a96cc354c7266a038be8b5c558f67",
         "balance":"0"
      }
   ]
}

📖 Tip: The result is returned in wei.

Convert Ethereum units using our Unit Converter.

Get a list of 'Normal' Transactions By Address

Returns the list of transactions performed by an address, with optional pagination.

​​ ​ 📝 Note : This API endpoint returns a maximum of 10000 records, and 1000 records without an API Key

https://api.basescan.org/api
   ?module=account
   &action=txlist
   &address=0xc5102fE9359FD9a28f877a67E36B0F050d81a3CC
   &startblock=0
   &endblock=99999999
   &page=1
   &offset=10
   &sort=asc
   &apikey=YourApiKeyToken

Try this endpoint in your browser 🔗

Request

Query Parameters

Parameter	Description
address	the string representing the addresses to check for balance
startblock	the integer block number to start searching for transactions
endblock	the integer block number to stop searching for transactions
page	the integer page number, if pagination is enabled
offset	the number of transactions displayed per page
sort	the sorting preference, use asc to sort by ascending and desc to sort by descendin Tip: Specify a smaller startblock and endblock range for faster search results.

Response

Sample Response

{
   "status":"1",
   "message":"OK",
   "result":[
      {
         "blockNumber":"1801040",
         "timeStamp":"1690391427",
         "hash":"0x4272e90c6253ff30add0e6cc18309639437d37e639ad7d8d13a62d7c0619ae25",
         "nonce":"1",
         "blockHash":"0x3733c3df6d36dd2f080b94a36e77f9598d3239e821d3649a194d775e2e65bf2c",
         "transactionIndex":"1",
         "from":"0x9aa99c23f67c81701c772b106b4f83f6e858dd2e",
         "to":"",
         "value":"0",
         "gas":"5000000",
         "gasPrice":"10000000000",
         "isError":"0",
         "txreceipt_status":"1",
         "input":"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         "contractAddress":"0xc5102fe9359fd9a28f877a67e36b0f050d81a3cc",
         "cumulativeGasUsed":"3741349",
         "gasUsed":"3694448",
         "confirmations":"28771",
         "methodId":"0x61016060",
         "functionName":""
      },
      {
         "blockNumber":"1801043",
         "timeStamp":"1690391433",
         "hash":"0xb1f9a7de6dbb64a07d0ec293ad4196e7edc0bbe59c7dd3f4f071e1aea442f998",
         "nonce":"2",
         "blockHash":"0x0f3718c1866de5e400a95c3354417f27a5224e1c2be2821a943152628ea5dbd5",
         "transactionIndex":"1",
         "from":"0x9aa99c23f67c81701c772b106b4f83f6e858dd2e",
         "to":"0xc5102fe9359fd9a28f877a67e36b0f050d81a3cc",
         "value":"0",
         "gas":"5000000",
         "gasPrice":"10000000000",
         "isError":"0",
         "txreceipt_status":"1",
         "input":"0xf2fde38b000000000000000000000000924ac9910c09a0215b06458653b30471a152022f",
         "contractAddress":"",
         "cumulativeGasUsed":"79563",
         "gasUsed":"29062",
         "confirmations":"28768",
         "methodId":"0xf2fde38b",
         "functionName":"transferOwnership(address newOwner)"
      }
   ]
}

Get a list of 'Internal' Transactions by Address

Returns the list of internal transactions performed by an address, with optional pagination.

📝 Note : This API endpoint returns a maximum of 10000 records, and 1000 records without an API Key

https://api.basescan.org/api
   ?module=account
   &action=txlistinternal
   &address=0x4200000000000000000000000000000000000015
   &startblock=0
   &endblock=2702578
   &page=1
   &offset=10
   &sort=asc
   &apikey=YourApiKeyToken

Try this endpoint in your browser 🔗

Request

Query Parameters

Parameter	Description
address	the string representing the addresses to check for balance
startblock	the integer block number to start searching for transactions
endblock	the integer block number to stop searching for transactions
page	the integer page number, if pagination is enabled
offset	the number of transactions displayed per page
sort	the sorting preference, use asc to sort by ascending and desc to sort by descending

💡 Tip: Specify a smaller startblock and endblock range for faster search results

Response

Sample Response

{
   "status":"1",
   "message":"OK",
   "result":[
      {
         "blockNumber":"1",
         "timeStamp":"1686789349",
         "hash":"0x68736fb400dc3b69ab1c4c2cbe75a600aa7ba7cd8d025797ebd8a0108955c91f",
         "from":"0x4200000000000000000000000000000000000015",
         "to":"0xc0d3c0d3c0d3c0d3c0d3c0d3c0d3c0d3c0d30015",
         "value":"0",
         "contractAddress":"",
         "input":"",
         "type":"delegatecall",
         "gas":"956917",
         "gasUsed":"36084",
         "traceId":"0_1",
         "isError":"0",
         "errCode":""
      },
      {
         "blockNumber":"2",
         "timeStamp":"1686789351",
         "hash":"0x2e153fdb0c9226f5c036893f9285e0e90ebdb0829a2d93eb7c9c93b63e0fcfd4",
         "from":"0x4200000000000000000000000000000000000015",
         "to":"0xc0d3c0d3c0d3c0d3c0d3c0d3c0d3c0d3c0d30015",
         "value":"0",
         "contractAddress":"",
         "input":"",
         "type":"delegatecall",
         "gas":"956917",
         "gasUsed":"18984",
         "traceId":"0_1",
         "isError":"0",
         "errCode":""
      }
   ]
}

Get 'Internal Transactions' by Transaction Hash

Returns the list of internal transactions performed within a transaction.

📝 Note : This API endpoint returns a maximum of 10000 records, and 1000 records without an API Key

https://api.basescan.org/api
   ?module=account
   &action=txlistinternal
   &txhash=0x3190ee988c62654d52d15eb023d7b5727d2104024cad4625791281513127ffac
   &apikey=YourApiKeyToken

Try this endpoint in your browser 🔗

Request

Query Parameters

Parameter	Description
txhash	the string representing the transaction hash to check for internal transactions

Response

Sample Response

{
   "status":"1",
   "message":"OK",
   "result":[
      {
         "blockNumber":"1824790",
         "timeStamp":"1690438927",
         "from":"0x3491fe4c3ababdfee894b1a2ecd042827ddb893d",
         "to":"0xb6319cc6c8c27a8f5daf0dd3df91ea35c4720dd7",
         "value":"109558668139425",
         "contractAddress":"",
         "input":"",
         "type":"call",
         "gas":"87093",
         "gasUsed":"84929",
         "isError":"0",
         "errCode":""
      },
      {
         "blockNumber":"1824790",
         "timeStamp":"1690438927",
         "from":"0xb6319cc6c8c27a8f5daf0dd3df91ea35c4720dd7",
         "to":"0x38de71124f7a447a01d67945a51edce9ff491251",
         "value":"109558668139425",
         "contractAddress":"",
         "input":"",
         "type":"call",
         "gas":"66756",
         "gasUsed":"65330",
         "isError":"0",
         "errCode":""
      }
   ]
}

The isError field returns 0 for successful transactions and 1 for rejected/cancelled transactions.

Get "Internal Transactions" by Block Range

Returns the list of internal transactions performed within a block range, with optional pagination.

​​ 📝 Note : This API endpoint returns a maximum of 10000 records, and 1000 records without an API Key

https://api.basescan.org/api
   ?module=account
   &action=txlistinternal
   &startblock=1000013
   &endblock=1001013
   &page=1
   &offset=10
   &sort=asc
   &apikey=YourApiKeyToken

Try this endpoint in your browser 🔗

Request

Query Parameters

Parameter	Description
startblock	the integer block number to start searching for transactions
endblock	the integer block number to stop searching for transactions
page	the integer page number, if pagination is enabled
offset	the number of transactions displayed per page
sort	the sorting preference, use asc to sort by ascending and desc to sort by descending

Response

Sample Response

{
   "status":"1",
   "message":"OK",
   "result":[
      {
         "blockNumber":"1000013",
         "timeStamp":"1688789373",
         "hash":"0x32d96bd248a30e4c279ca97555c5c9d9bd42b8578a562ca10d47e692a51b250e",
         "from":"0x4200000000000000000000000000000000000015",
         "to":"0xc0d3c0d3c0d3c0d3c0d3c0d3c0d3c0d3c0d30015",
         "value":"0",
         "contractAddress":"",
         "input":"",
         "type":"delegatecall",
         "gas":"956929",
         "gasUsed":"18984",
         "traceId":"0_1",
         "isError":"0",
         "errCode":""
      },
      {
         "blockNumber":"1000014",
         "timeStamp":"1688789375",
         "hash":"0x2f5a3a4b933a1a51f46f2aef2d16d713de8309718140e4f394461abc451d5581",
         "from":"0x4200000000000000000000000000000000000015",
         "to":"0xc0d3c0d3c0d3c0d3c0d3c0d3c0d3c0d3c0d30015",
         "value":"0",
         "contractAddress":"",
         "input":"",
         "type":"delegatecall",
         "gas":"956929",
         "gasUsed":"27384",
         "traceId":"0_1",
         "isError":"0",
         "errCode":""
      }
   ]
}

The isError field returns 0 for successful transactions and 1 for rejected/cancelled transactions.

Get a list of 'ERC20 - Token Transfer Events' by Address

Returns the list of ERC-20 tokens transferred by an address, with optional filtering by token contract.

https://api.basescan.org/api
   ?module=account
   &action=tokentx
   &contractaddress=0x4200000000000000000000000000000000000006
   &address=0xfcd3842f85ed87ba2889b4d35893403796e67ff1
   &page=1
   &offset=100
   &startblock=0
   &endblock=27025780
   &sort=asc
   &apikey=YourApiKeyToken

Usage:

• ERC-20 transfers from an address, specify the address parameter

• ERC-20 transfers from a contract address, specify the contract address parameter

• ERC-20 transfers from an address filtered by a token contract, specify both address and contract address parameters.

Try this endpoint in your browser 🔗

Request

Query Parameters

Parameter	Description
address	the string representing the address to check for balance
contractaddress	the string representing the token contract address to check for balance
page	the integer page number, if pagination is enabled
offset	the number of transactions displayed per page
startblock	the integer block number to start searching for transactions
endblock	the integer block number to stop searching for transactions
sort	the sorting preference, use asc to sort by ascending and desc to sort by descending

Response

Sample Response

{
   "status":"1",
   "message":"OK",
   "result":[
      {
         "blockNumber":"1798354",
         "timeStamp":"1690386055",
         "hash":"0xdb838eaaa510e3d34effdc8c43d8cc07af4a21ee8b8f70f3e6a2852f60942baf",
         "nonce":"5",
         "blockHash":"0x7b4774a4e9acb9f9b3e6c051552e9bd5032146b6e21c3c7fc53c228b7dc979fb",
         "from":"0xfcd3842f85ed87ba2889b4d35893403796e67ff1",
         "contractAddress":"0x4200000000000000000000000000000000000006",
         "to":"0xd02d69c0ab8f5b9201198bde104ab4923b53630e",
         "value":"200000000000000000",
         "tokenName":"Wrapped Ether",
         "tokenSymbol":"WETH",
         "tokenDecimal":"18",
         "transactionIndex":"1",
         "gas":"418716",
         "gasPrice":"1000000000",
         "gasUsed":"322410",
         "cumulativeGasUsed":"369323",
         "input":"deprecated",
         "confirmations":"31671"
      },
      {
         "blockNumber":"1798364",
         "timeStamp":"1690386075",
         "hash":"0x76043f355916523c49ee15988319340da023f293021c77bf102afa3a16865030",
         "nonce":"1",
         "blockHash":"0x68a99cfec6ca05b318421ff86cb39bae251a6a86da2d7d642410d9562c4427e2",
         "from":"0xfcd3842f85ed87ba2889b4d35893403796e67ff1",
         "contractAddress":"0x4200000000000000000000000000000000000006",
         "to":"0xd02d69c0ab8f5b9201198bde104ab4923b53630e",
         "value":"2000000000000000",
         "tokenName":"Wrapped Ether",
         "tokenSymbol":"WETH",
         "tokenDecimal":"18",
         "transactionIndex":"1",
         "gas":"412089",
         "gasPrice":"1500000050",
         "gasUsed":"315315",
         "cumulativeGasUsed":"362228",
         "input":"deprecated",
         "confirmations":"31661"
      }
   ]
}

Get a list of 'ERC721 - Token Transfer Events' by Address

Returns the list of ERC-721 ( NFT ) tokens transferred by an address, with optional filtering by token contract.

https://api.basescan.org/api
   ?module=account
   &action=tokennfttx
   &contractaddress=0x1fc10ef15e041c5d3c54042e52eb0c54cb9b710c
   &address=0xb82880e217478907cc9b1e5795d75d3257608ce0
   &page=1
   &offset=100
   &startblock=0
   &endblock=27025780
   &sort=asc
   &apikey=YourApiKeyToken

Usage:

• ERC-721 transfers from an address, specify the address parameter

• ERC-721 transfers from a contract address, specify the contract address parameter

• ERC-721 transfers from an address filtered by a token contract, specify both address and contract address parameters.

Try this endpoint in your browser 🔗

Request

Query Parameters

Parameter	Description
address	the string representing the address to check for balance
contractaddress	the string representing the token contract address to check for balance
page	the integer page number, if pagination is enabled
offset	the number of transactions displayed per page
startblock	the integer block number to start searching for transactions
endblock	the integer block number to stop searching for transactions
sort	the sorting preference, use asc to sort by ascending and desc to sort by descending

Response

Sample Response

{
   "status":"1",
   "message":"OK",
   "result":[
      {
         "blockNumber":"1830023",
         "timeStamp":"1690449393",
         "hash":"0x66485621605e8c8d60ab7ddac0f75ee9c397e24bc3c1e87069b01409a01ec6ad",
         "nonce":"1",
         "blockHash":"0x5a7e2bc24e43181298e19e82c2984f5014ef595caf752036e887fd2a63a04f2f",
         "from":"0x0000000000000000000000000000000000000000",
         "contractAddress":"0x1fc10ef15e041c5d3c54042e52eb0c54cb9b710c",
         "to":"0xb82880e217478907cc9b1e5795d75d3257608ce0",
         "tokenID":"81180",
         "tokenName":"Base is for builders",
         "tokenSymbol":"BASEBUILDERS",
         "tokenDecimal":"0",
         "transactionIndex":"1",
         "gas":"118857",
         "gasPrice":"1500000050",
         "gasUsed":"79238",
         "cumulativeGasUsed":"126151",
         "input":"deprecated",
         "confirmations":"33"
      }
   ]
}

Get a list of 'ERC1155 - Token Transfer Events' by Address

Returns the list of ERC-1155 ( Multi Token Standard ) tokens transferred by an address, with optional filtering by token contract.

https://api.basescan.org/api
   ?module=account
   &action=token1155tx
   &contractaddress=0xba5e05cb26b78eda3a2f8e3b3814726305dcac83
   &address=0x8cd98dea4e95170f068e6d5aed1e7f1c285e7f77
   &page=1
   &offset=100
   &startblock=0
   &endblock=99999999
   &sort=asc
   &apikey=YourApiKeyToken

Usage:

• ERC-1155 transfers from an address, specify the address parameter

• ERC-1155 transfers from a contract address, specify the contract address parameter

• ERC-1155 transfers from an address filtered by a token contract, specify both address and contract address parameters.

Try this endpoint in your browser 🔗

Get Historical ETH Balance for a Single Address by BlockNo

Returns the historical ETH balance of an address at a certain block height.

📝 Note : This endpoint is throttled to 2 calls/second regardless of API Pro tier.

https://api.basescan.org/api
   ?module=account
   &action=balancehistory
   &address=0xf977814e90da44bfa03b6295a0616a897441acec
   &blockno=10000000
   &apikey=YourApiKeyToken

Try this endpoint in your browser 🔗

Request

Query Parameters

Parameter	Description
address	the strings representing the addresses to check for balance, separated by , commas
blockno	the integer block number to check balance for eg. 2000000

Response

Sample Response

{
   "status":"1",
   "message":"OK",
   "result":"24095801991560885658761"
}

📖 Tip: The result is returned in wei.

Convert ETH units using our Unit Converter.