API PRO Endpoints

The following is a complete list of additional API endpoints available under the API PRO subscription.

To upgrade your API plan, kindly visit BaseScan APIs.

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

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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.

Get Daily Average Block Size

Returns the daily average block size within a date range.

https://api.basescan.org/api
   ?module=stats
   &action=dailyavgblocksize
   &startdate=2023-08-01
   &enddate=2023-08-02
   &sort=asc
   &apikey=YourApiKeyToken

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Request

Query Parameters

Parameter	Description
startdate	the starting date in yyyy-MM-dd format, eg. 2021-08-01
enddate	the ending date in yyyy-MM-dd format, eg. 2021-08-31
sort	the sorting preference, use asc to sort by ascending and desc to sort by descending

Response

Sample Response

{
  "status": "1",
  "message": "OK",
  "result": [
    {
      "UTCDate": "2023-08-01",
      "unixTimeStamp": "1690848000",
      "blockSize_bytes": 0
    },
    {
      "UTCDate": "2023-08-02",
      "unixTimeStamp": "1690934400",
      "blockSize_bytes": 0
    }
  ]
}

Get Daily Block Count and Rewards

Returns the number of blocks validated daily and the amount of block rewards.

https://api.basescan.org/api
   ?module=stats
   &action=dailyblkcount
   &startdate=2023-08-01
   &enddate=2023-08-02
   &sort=asc
   &apikey=YourApiKeyToken

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Request

Query Parameters

Parameter	Description
startdate	the starting date in yyyy-MM-dd format, eg. 2021-08-01
enddate	the ending date in yyyy-MM-dd format, eg. 2021-08-31
sort	the sorting preference, use asc to sort by ascending and desc to sort by descending

Response

Sample Response

{
  "status": "1",
  "message": "OK",
  "result": [
    {
      "UTCDate": "2023-08-01",
      "unixTimeStamp": "1690848000",
      "blockSize_bytes": 0
    },
    {
      "UTCDate": "2023-08-02",
      "unixTimeStamp": "1690934400",
      "blockSize_bytes": 0
    }
  ]
}

Get Daily Block Rewards

Returns the amount of block rewards distributed to validators daily.

https://api.basescan.org/api
   ?module=stats
   &action=dailyblockrewards
   &startdate=2023-08-01
   &enddate=2023-08-02
   &sort=asc
   &apikey=YourApiKeyToken

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Request

Query Parameters

Parameter	Description
startdate	the starting date in yyyy-MM-dd format, eg. 2021-08-01
enddate	the ending date in yyyy-MM-dd format, eg. 2021-08-31
sort	the sorting preference, use asc to sort by ascending and desc to sort by descending

Response

Sample Response

{
  "status": "1",
  "message": "OK",
  "result": [
    {
      "UTCDate": "2023-08-01",
      "unixTimeStamp": "1690848000",
      "blockRewards_Eth": "29.342876545277035327"
    },
    {
      "UTCDate": "2023-08-02",
      "unixTimeStamp": "1690934400",
      "blockRewards_Eth": "26.520254682077361269"
    }
  ]
}

Get Daily Average Time for A Block to be Included in the Base Chain

Returns the daily average of time needed for a block to be successfully validated.

https://api.basescan.org/api
   ?module=stats
   &action=dailyavgblocktime
   &startdate=2023-08-01
   &enddate=2023-08-02
   &sort=asc
   &apikey=YourApiKeyToken

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Request

Query Parameters

Parameter	Description
startdate	the starting date in yyyy-MM-dd format, eg. 2021-08-01
enddate	the ending date in yyyy-MM-dd format, eg. 2021-08-31
sort	the sorting preference, use asc to sort by ascending and desc to sort by descending

Response

Sample Response

{
  "status": "1",
  "message": "OK",
  "result": [
    {
      "UTCDate": "2023-08-01",
      "unixTimeStamp": "1690848000",
      "blockTime_sec": "0.00"
    },
    {
      "UTCDate": "2023-08-02",
      "unixTimeStamp": "1690934400",
      "blockTime_sec": "0.00"
    }
  ]
}

Get Historical ERC-20 Token TotalSupply by ContractAddress & BlockNo

Returns the historical amount of a ERC-20 token in circulation 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=stats
   &action=tokensupplyhistory
   &contractaddress=0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
   &blockno=10000000
   &apikey=YourApiKeyToken

Try this endpoint in your browser 🔗

Request

Query Parameters

Parameter	Description
contractaddress	the contract address of the ERC-20 token
blockno	the integer block number to check total supply for eg. 4000000

Response

Sample Response

{
   "status":"1",
   "message":"OK",
   "result":"205971585207240"
}

📈 Tip : The result is returned in the token's smallest decimal representation.

Eg. a token with a balance of 215.241526476136819398 and 18 decimal places will be returned as 215241526476136819398

Get Historical ERC-20 Token Account Balance by ContractAddress & BlockNo

Returns the balance of a ERC-20 token 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=tokenbalancehistory
   &contractaddress=0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
   &address=0x1d147c866182f072c821eb1fa9817e87b9547861
   &blockno=11801569
   &apikey=YourApiKeyToken

Parameter	Description
contractaddress	the contract address of the ERC-20 token
blockno	the integer block number to check total supply for eg. 4000000
Address	Target address

Get Address ERC-20 Token Holdings

Return the current ERC20 token holders and number of tokens held.

https://api.basescan.org/api
    ?module=account
    &action=addresstokenbalance
    &address=0xFd92F4e91d54B9EF91cc3f97C011a6aF0C2a7eDa
    &page=1
    &offset=2
    &apikey=YourApikeyToken

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Request

Query Parameters

Parameter	Description
address	the string representing the address to check for Token Holdings
page	the integer page number, if pagination is enabled
offset	the number of transactions displayed per page

Response

Sample Response

{
  "status": "1",
  "message": "OK",
  "result": [
    {
      "TokenAddress": "0xc088797eaee27e0b1b80cd0ccc02b5792182ba6d",
      "TokenName": "BASELOL",
      "TokenSymbol": "BASELOL",
      "TokenQuantity": "4000000000000000000000",
      "TokenDivisor": "18"
    },
    {
      "TokenAddress": "0x599005e69d937c2e30603d3571347f1f705ebf3a",
      "TokenName": "Ether Pulse",
      "TokenSymbol": "ETPS",
      "TokenQuantity": "66870216684000000000",
      "TokenDivisor": "12"
    }
  ]
}

Get Address ERC-721 Token Holding

Return the current ERC20 token holders and number of tokens held.

https://api.basescan.org/api
    ?module=account
    &action=addresstokennftbalance
    &address=0x64baeb02876aa58078aa25c1c43b7a5492873559
    &page=1
    &offset=2
    &apikey=YourApiKeyToken

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Request

Query Parameters

Parameter	Description
address	the string representing the address to check for Token Holdings
page	the integer page number, if pagination is enabled
offset	the number of transactions displayed per page

Response

Sample Response

{
  "status": "1",
  "message": "OK",
  "result": [
    {
      "TokenAddress": "0x85e7df5708902be39891d59abef8e21ede91e8bf",
      "TokenName": "Degen Haberdashers",
      "TokenSymbol": "DGNHTS",
      "TokenQuantity": "8"
    },
    {
      "TokenAddress": "0x10e65619e75214cc6e8c2522a83acf8636ce9dfd",
      "TokenName": "Degens",
      "TokenSymbol": "DEGEN",
      "TokenQuantity": "100"
    }
  ]
}

Get Address ERC721 Token Inventory By Contract Address

https://api.basescan.org/api
    ?module=account
    &action=addresstokennftinventory
    &address=0x64baeb02876aa58078aa25c1c43b7a5492873559
    &contractaddress=0x85e7df5708902be39891d59abef8e21ede91e8bf
    &page=1
    &offset=20
    &apikey=YourApiKeyToken

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Request

Query Parameters

Parameter	Description
address	the string representing the address to check for inventory
contractaddress	the contract address of the ERC-721 token
page	the integer page number, if pagination is enabled
offset	the number of transactions displayed per page

Response

Sample Response

{
  "status": "1",
  "message": "OK",
  "result": [
    {
      "TokenAddress": "0x85e7df5708902be39891d59abef8e21ede91e8bf",
      "TokenId": "454"
    },
    {
      "TokenAddress": "0x85e7df5708902be39891d59abef8e21ede91e8bf",
      "TokenId": "355"
    },
    {
      "TokenAddress": "0x85e7df5708902be39891d59abef8e21ede91e8bf",
      "TokenId": "486"
    },
    {
      "TokenAddress": "0x85e7df5708902be39891d59abef8e21ede91e8bf",
      "TokenId": "588"
    },
    {
      "TokenAddress": "0x85e7df5708902be39891d59abef8e21ede91e8bf",
      "TokenId": "338"
    },
    {
      "TokenAddress": "0x85e7df5708902be39891d59abef8e21ede91e8bf",
      "TokenId": "103"
    },
    {
      "TokenAddress": "0x85e7df5708902be39891d59abef8e21ede91e8bf",
      "TokenId": "405"
    },
    {
      "TokenAddress": "0x85e7df5708902be39891d59abef8e21ede91e8bf",
      "TokenId": "683"
    }
  ]
}

Get Token Holder List by Contract Address

Return the current ERC20 token holders and number of tokens held.

https://api.basescan.org/api
   ?module=token
   &action=tokenholderlist
   &contractaddress=0x50c5725949A6F0c72E6C4a641F24049A917DB0Cb&
   &page=1
   &offset=10
   &apikey=YourApiKeyToken 

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Request

Query Parameters

Parameter	Description
contractaddress	the contract address of the ERC-20 token
page	the integer page number, if pagination is enabled
offset	the number of transactions displayed per page

Response

Sample Response

{
  "status": "1",
  "message": "OK",
  "result": [
    {
      "TokenHolderAddress": "0xba12222222228d8ba445958a75a0704d566bf2c8",
      "TokenHolderQuantity": "4573970636171019544227"
    },
    {
      "TokenHolderAddress": "0x1ded454abc7e02119adf09860954144847c9f619",
      "TokenHolderQuantity": "10000000000000000"
    }
  ]
}

Get Token Info by ContractAddress

Returns project information and social media links of an ERC-20/ERC-721 token.

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

https://api.basescan.org/api
   ?module=token
   &action=tokeninfo
   &contractaddress=0x50c5725949A6F0c72E6C4a641F24049A917DB0Cb
   &apikey=YourApiKeyToken

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Request

Query Parameters

Parameter	Description
contractaddress	the contract address of the ERC-20/ERC-721 token to retrieve token info

Response

Sample Response

{
  "status": "1",
  "message": "OK",
  "result": [
    {
      "contractAddress": "0x50c5725949a6f0c72e6c4a641f24049a917db0cb",
      "tokenName": "Dai Stablecoin",
      "symbol": "DAI",
      "divisor": "18",
      "tokenType": "ERC20",
      "totalSupply": "2921565106401030186792291",
      "blueCheckmark": "true",
      "description": "",
      "website": "https://makerdao.com/",
      "email": "[e-mail]",
      "blog": "https://blog.makerdao.com/",
      "reddit": "https://www.reddit.com/r/MakerDAO/",
      "slack": "https://chat.makerdao.com/",
      "facebook": "",
      "twitter": "https://twitter.com/MakerDAO",
      "bitcointalk": "",
      "github": "",
      "telegram": "https://t.me/makerdaoOfficial",
      "wechat": "",
      "linkedin": "",
      "discord": "https://discord.com/invite/RBRumCpEDH",
      "whitepaper": "http://docs.makerdao.com/",
      "tokenPriceUSD": "0.9999334003"
    }
  ]
}

Get Daily Average Gas Limit

Returns the historical daily average gas limit of the Base network.

 https://api.basescan.org/api
    ?module=stats
    &action=dailyavggaslimit
    &startdate=2023-08-01
    &enddate=2023-08-02
    &sort=asc
    &apikey=YourApiKeyToken 

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Request

Query Parameters

Parameter	Description
startdate	the starting date in yyyy-MM-dd format, eg. 2019-01-31
enddate	the ending date in yyyy-MM-dd format, eg. 2019-02-28
sort	the sorting preference, use asc to sort by ascending and desc to sort by descending

Response

Sample Response

{
  "status": "1",
  "message": "OK",
  "result": [
    {
      "UTCDate": "2023-08-01",
      "unixTimeStamp": "1690848000",
      "gasLimit": "30000000"
    },
    {
      "UTCDate": "2023-08-02",
      "unixTimeStamp": "1690934400",
      "gasLimit": "30000000"
    }
  ]
}

Get Base Daily Total Gas Used

Returns the total amount of gas used daily for transactions on the Base network.

 https://api.basescan.org/api
    ?module=stats
    &action=dailygasused
    &startdate=2023-08-01
    &enddate=2023-08-02
    &sort=asc
    &apikey=YourApiKeyToken 

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Request

Query Parameters

Parameter	Description
startdate	the starting date in yyyy-MM-dd format, eg. 2019-01-31
enddate	the ending date in yyyy-MM-dd format, eg. 2019-02-28
sort	the sorting preference, use asc to sort by ascending and desc to sort by descending

Response

Sample Response

{
  "status": "1",
  "message": "OK",
  "result": [
    {
      "UTCDate": "2023-08-01",
      "unixTimeStamp": "1690848000",
      "gasUsed": "38608792398"
    },
    {
      "UTCDate": "2023-08-02",
      "unixTimeStamp": "1690934400",
      "gasUsed": "47317486287"
    }
  ]
}

Get Daily Average Gas Price

Returns the daily average gas price used on the Base network.

 https://api.basescan.org/api
    ?module=stats
    &action=dailyavggasprice
    &startdate=2023-08-01
    &enddate=2023-08-02
    &sort=asc
    &apikey=YourApiKeyToken 

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Request

Query Parameters

Parameter	Description
startdate	the starting date in yyyy-MM-dd format, eg. 2019-01-31
enddate	the ending date in yyyy-MM-dd format, eg. 2019-02-28
sort	the sorting preference, use asc to sort by ascending and desc to sort by descending

Response

Sample Response

{
  "status": "1",
  "message": "OK",
  "result": [
    {
      "UTCDate": "2023-08-01",
      "unixTimeStamp": "1690848000",
      "maxGasPrice_Wei": "2000000000051",
      "minGasPrice_Wei": "100",
      "avgGasPrice_Wei": "1192177546"
    },
    {
      "UTCDate": "2023-08-02",
      "unixTimeStamp": "1690934400",
      "maxGasPrice_Wei": "3451000000054",
      "minGasPrice_Wei": "100",
      "avgGasPrice_Wei": "1246498225"
    }
  ]
}

Get ETH Historical Price

Returns the historical price of 1 ETH.

https://api.basescan.org/api
   ?module=stats
   &action=ethdailyprice
   &startdate=2023-08-01
   &enddate=2023-08-02
   &sort=asc
   &apikey=YourApiKeyToken

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Request

Query Parameters

Parameter	Description
startdate	the starting date in yyyy-MM-dd format, eg. 2021-08-01
enddate	the ending date in yyyy-MM-dd format, eg. 2021-08-28
sort	the sorting preference, use asc to sort by ascending and desc to sort by descending

Response

Sample Response

{
  "status": "1",
  "message": "OK",
  "result": [
    {
      "UTCDate": "2023-08-01",
      "unixTimeStamp": "1690848000",
      "value": "1872.94"
    },
    {
      "UTCDate": "2023-08-02",
      "unixTimeStamp": "1690934400",
      "value": "1839.06"
    }
  ]
}

💰 Tip : The value is represented in US Dollars ( USD ).

Get Daily Network Transaction Fee

Returns the historical amount of transaction fees paid to validators per day.

https://api.basescan.org/api?
   module=stats
   &action=dailytxnfee
   &startdate=2023-08-01
   &enddate=2023-08-02
   &sort=asc
   &apikey=YourApiKeyToken 

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Request

Query Parameters

Parameter	Description
startdate	the starting date in yyyy-MM-dd format, eg. 2020-10-01
enddate	the ending date in yyyy-MM-dd format, eg. 2020-10-31
sort	the sorting preference, use asc to sort by ascending and desc to sort by descending

Response

Sample Response

{
  "status": "1",
  "message": "OK",
  "result": [
    {
      "UTCDate": "2023-08-01",
      "unixTimeStamp": "1690848000",
      "transactionFee_Eth": "0"
    },
    {
      "UTCDate": "2023-08-02",
      "unixTimeStamp": "1690934400",
      "transactionFee_Eth": "0"
    }
  ]
}

Get Daily New Address Count

Returns the historical number of new Base Chain addresses created per day.

https://api.basescan.org/api
   ?module=stats
   &action=dailynewaddress
   &startdate=2023-08-01
   &enddate=2023-08-02
   &sort=asc
   &apikey=YourApiKeyToken

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Request

Query Parameters

Parameter	Description
startdate	the starting date in yyyy-MM-dd format, eg. 2020-10-01
enddate	the ending date in yyyy-MM-dd format, eg. 2020-10-31
sort	the sorting preference, use asc to sort by ascending and desc to sort by descending

Response

Sample Response

{
  "status": "1",
  "message": "OK",
  "result": [
    {
      "UTCDate": "2023-08-01",
      "unixTimeStamp": "1690848000",
      "newAddressCount": 12772
    },
    {
      "UTCDate": "2023-08-02",
      "unixTimeStamp": "1690934400",
      "newAddressCount": 12692
    }
  ]
}

Get Daily Network Utilization

Returns the daily average gas used over gas limit percentage.

https://api.basescan.org/api
   ?module=stats
   &action=dailynetutilization
   &startdate=2023-08-01
   &enddate=2023-08-02
   &sort=asc
   &apikey=YourApiKeyToken

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Request

Query Parameters

Parameter	Description
startdate	the starting date in yyyy-MM-dd format, eg. 2021-07-01
enddate	the ending date in yyyy-MM-dd format, eg. 2021-07-28
sort	the sorting preference, use asc to sort by ascending and desc to sort by descending

Response

Sample Response

{
  "status": "1",
  "message": "OK",
  "result": [
    {
      "UTCDate": "2023-08-01",
      "unixTimeStamp": "1690848000",
      "networkUtilization": "0.0315"
    },
    {
      "UTCDate": "2023-08-02",
      "unixTimeStamp": "1690934400",
      "networkUtilization": "0.0383"
    }
  ]
}

Get Daily Transaction Count

Returns the number of transactions performed on the Base Chain per day.

https://api.basescan.org/api
   ?module=stats
   &action=dailytx
   &startdate=2023-08-01
   &enddate=2023-08-02
   &sort=asc
   &apikey=YourApiKeyToken

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Request

Query Parameters

Parameter	Description
startdate	the starting date in yyyy-MM-dd format, eg. 2021-07-01
enddate	the ending date in yyyy-MM-dd format, eg. 2021-07-28
sort	the sorting preference, use asc to sort by ascending and desc to sort by descending

Response

Sample Response

{
  "status": "1",
  "message": "OK",
  "result": [
    {
      "UTCDate": "2023-08-01",
      "unixTimeStamp": "1690848000",
      "transactionCount": 206671
    },
    {
      "UTCDate": "2023-08-02",
      "unixTimeStamp": "1690934400",
      "transactionCount": 193053
    }
  ]
}