Arbitrum API

All of the Arbitrum JSON-RPC API methods that are supported by Alchemy.
For more information on Arbitrum's API check out the official documentation.
HINT: If you click on the "Example" title you can try out all the example requests in real-time using our Composer tool, however all the example requests are on Ethereum mainnet, to switch to Arbitrum simply toggle the "network" dropdown.  
Query methods with a block number argument more than 20 blocks behind latest are currently not supported on Arbitrum.
Mainnet vs. Testnet
There are two networks on Arbitrum: Mainnet and Rinkeby testnet. The endpoints are as follows:
Mainnet: https://arb-mainnet.g.alchemy.com/v2/your-api-key
Rinkeby:  https://arb-rinkeby.g.alchemy.com/v2/your-api-key
​📦 Retrieving Blocks
Calls related to retrieving blocks and block information. 
eth_blockNumber
Returns the number of the most recent block.
Parameters
none
Returns
QUANTITY - integer of the current block number the client is on.
​Example​
Request
Curl
Postman
Curl
curl https://arb-mainnet.g.alchemy.com/v2/your-api-key \
-X POST \
-H "Content-Type: application/json" \
-d '{"jsonrpc":"2.0","method":"eth_blockNumber","params":[],"id":0}'
Postman
URL: https://arb-mainnet.g.alchemy.com/v2/your-api-key
RequestType: POST
Body: 
{
    "jsonrpc":"2.0",
    "method":"eth_blockNumber",
    "params":[],
    "id":0
}
Result
{
  "jsonrpc": "2.0",
  "id": 0,
  "result": "0xa1c054"
}
eth_getBlockByHash
Returns information about a block by hash.
Parameters
DATA, 32 Bytes - Hash of a block.
Boolean - If true it returns the full transaction objects, if false it returns only the hashes of the transactions.
params: [
    '0xc0f4906fea23cf6f3cce98cb44e8e1449e455b28d684dfa9ff65426495584de6',
    true
]
Returns
Object - A block object with the following fields, or null when no block was found:
number: QUANTITY - the block number. null when its pending block.
hash: DATA, 32 Bytes - hash of the block. null when its pending block.
parentHash: DATA, 32 Bytes - hash of the parent block.
nonce: DATA, 8 Bytes - hash of the generated proof-of-work. null when its pending block.
sha3Uncles: DATA, 32 Bytes - SHA3 of the uncles data in the block.
logsBloom: DATA, 256 Bytes - the bloom filter for the logs of the block. null when its pending block.
transactionsRoot: DATA, 32 Bytes - the root of the transaction trie of the block.
stateRoot: DATA, 32 Bytes - the root of the final state trie of the block.
receiptsRoot: DATA, 32 Bytes - the root of the receipts trie of the block.
miner: DATA, 20 Bytes - the address of the beneficiary to whom the mining rewards were given.
difficulty: QUANTITY - integer of the difficulty for this block.
totalDifficulty: QUANTITY - integer of the total difficulty of the chain until this block.
extraData: DATA - the "extra data" field of this block.
size: QUANTITY - integer the size of this block in bytes.
gasLimit: QUANTITY - the maximum gas allowed in this block.
gasUsed: QUANTITY - the total used gas by all transactions in this block.
timestamp: QUANTITY - the unix timestamp for when the block was collated.
transactions: Array - Array of transaction objects, or 32 Bytes transaction hashes depending on the last given parameter.
uncles: Array - Array of uncle hashes.
​Example​
Request
Curl
Postman
Curl
curl https://arb-mainnet.g.alchemy.com/v2/your-api-key\
-X POST \
-H "Content-Type: application/json" \
-d '{"jsonrpc":"2.0","method":"eth_getBlockByHash","params":["0xc0f4906fea23cf6f3cce98cb44e8e1449e455b28d684dfa9ff65426495584de6", true],"id":0}'
Postman
URL: https://arb-mainnet.g.alchemy.com/v2/your-api-key
RequestType: POST
Body: 
{
    "jsonrpc":"2.0",
    "method":"eth_getBlockByHash",
    "params":["0xc0f4906fea23cf6f3cce98cb44e8e1449e455b28d684dfa9ff65426495584de6", true],
    "id":0
}
Result
{
  "jsonrpc": "2.0",
  "id": 0,
  "result": {
    "difficulty": "0x2d50ba175407",
    "extraData": "0xe4b883e5bda9e7a59ee4bb99e9b1bc",
    "gasLimit": "0x47e7c4",
    "gasUsed": "0x5208",
    "hash": "0xc0f4906fea23cf6f3cce98cb44e8e1449e455b28d684dfa9ff65426495584de6",
    "logsBloom": "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
    "miner": "0x61c808d82a3ac53231750dadc13c777b59310bd9",
    "mixHash": "0xc38853328f753c455edaa4dfc6f62a435e05061beac136c13dbdcd0ff38e5f40",
    "nonce": "0x3b05c6d5524209f1",
    "number": "0x1e8480",
    "parentHash": "0x57ebf07eb9ed1137d41447020a25e51d30a0c272b5896571499c82c33ecb7288",
    "receiptsRoot": "0x84aea4a7aad5c5899bd5cfc7f309cc379009d30179316a2a7baa4a2ea4a438ac",
    "sha3Uncles": "0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347",
    "size": "0x28a",
    "stateRoot": "0x96dbad955b166f5119793815c36f11ffa909859bbfeb64b735cca37cbf10bef1",
    "timestamp": "0x57a1118a",
    "totalDifficulty": "0x262c34a6fd1268f6c",
    "transactions": [
      "0xc55e2b90168af6972193c1f86fa4d7d7b31a29c156665d15b9cd48618b5177ef"
    ],
    "transactionsRoot": "0xb31f174d27b99cdae8e746bd138a01ce60d8dd7b224f7c60845914def05ecc58",
    "uncles": []
  }
}
eth_getBlockByNumber
Returns information about a block by block number.
Parameters
QUANTITY|TAG - integer of a block number, or the string "earliest", "latest" or "pending", as in the default block parameter.
Boolean - If true it returns the full transaction objects, if false only the hashes of the transactions.
params: [
    '0x1b4', 
    true
]
Returns
See eth_getBlockByHash​
​Example​
Request
Curl
Postman
Curl
curl https://arb-mainnet.g.alchemy.com/v2/your-api-key \
-X POST \
-H "Content-Type: application/json" \
-d '{"jsonrpc":"2.0","method":"eth_getBlockByNumber","params":["0x1b4", true],"id":0}'
Postman
URL: https://arb-mainnet.g.alchemy.com/v2/your-api-key
RequestType: POST
Body: 
{
    "jsonrpc":"2.0",
    "method":"eth_getBlockByNumber",
    "params":["0x1b4", true],
    "id":0
}
Result
{
  "jsonrpc": "2.0",
  "id": 0,
  "result": {
    "number": "0x1b4",
    "difficulty": "0x4ea3f27bc",
    "extraData": "0x476574682f4c5649562f76312e302e302f6c696e75782f676f312e342e32",
    "gasLimit": "0x1388",
    "gasUsed": "0x0",
    "hash": "0xdc0818cf78f21a8e70579cb46a43643f78291264dda342ae31049421c82d21ae",
    "logsBloom": "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
    "miner": "0xbb7b8287f3f0a933474a79eae42cbca977791171",
    "mixHash": "0x4fffe9ae21f1c9e15207b1f472d5bbdd68c9595d461666602f2be20daf5e7843",
    "nonce": "0x689056015818adbe",
    "parentHash": "0xe99e022112df268087ea7eafaf4790497fd21dbeeb6bd7a1721df161a6657a54",
    "receiptsRoot": "0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
    "sha3Uncles": "0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347",
    "size": "0x220",
    "stateRoot": "0xddc8b0234c2e0cad087c8b389aa7ef01f7d79b2570bccb77ce48648aa61c904d",
    "timestamp": "0x55ba467c",
    "totalDifficulty": "0x78ed983323d",
    "transactions": [],
    "transactionsRoot": "0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
    "uncles": []
  }
}
​🧾 Reading Transactions
Calls for reading transactions. 
eth_getTransactionByHash
Returns the information about a transaction requested by transaction hash. In the response object, blockHash, blockNumber, and transactionIndex are null when the transaction is pending.
Parameters
DATA, 32 Bytes - hash of a transaction 
params: [
    "0x88df016429689c079f3b2f6ad39fa052532c56795b733da78a91ebe6a713944b"
]
Returns
Object - A transaction object, or null when no transaction was found:
blockHash: DATA, 32 Bytes - hash of the block where this transaction was in. null when its pending.
blockNumber: QUANTITY - block number where this transaction was in. null when it's pending.
from: DATA, 20 Bytes - address of the sender.
gas: QUANTITY - gas provided by the sender.
gasPrice: QUANTITY - gas price provided by the sender in Wei.
hash: DATA, 32 Bytes - hash of the transaction.
input: DATA - the data send along with the transaction.
nonce: QUANTITY - the number of transactions made by the sender prior to this one.
to: DATA, 20 Bytes - address of the receiver. null when it's a contract creation transaction.
transactionIndex: QUANTITY - integer of the transactions index position in the block. null when its pending.
value: QUANTITY - value transferred in Wei.
v: QUANTITY - ECDSA recovery id
r: DATA, 32 Bytes - ECDSA signature r
s: DATA, 32 Bytes - ECDSA signature s
​Example​
Request
Curl
Postman
Curl
curl https://arb-mainnet.g.alchemy.com/v2/your-api-key \
-X POST \
-H "Content-Type: application/json" \
-d'{"jsonrpc":"2.0","method":"eth_getTransactionByHash","params":["0x88df016429689c079f3b2f6ad39fa052532c56795b733da78a91ebe6a713944b"],"id":0}'
Postman
URL: https://arb-mainnet.g.alchemy.com/v2/your-api-key
RequestType: POST
Body: 
{
    "jsonrpc":"2.0",
    "method":"eth_getTransactionByHash",
    "params":["0x88df016429689c079f3b2f6ad39fa052532c56795b733da78a91ebe6a713944b"],
    "id":0
}
Result
{
  "jsonrpc": "2.0",
  "id": 0,
  "result": {
    "hash": "0x88df016429689c079f3b2f6ad39fa052532c56795b733da78a91ebe6a713944b",
    "blockHash": "0x1d59ff54b1eb26b013ce3cb5fc9dab3705b415a67127a003c3e61eb445bb8df2",
    "blockNumber": "0x5daf3b",
    "from": "0xa7d9ddbe1f17865597fbd27ec712455208b6b76d",
    "gas": "0xc350",
    "gasPrice": "0x4a817c800",
    "input": "0x68656c6c6f21",
    "nonce": "0x15",
    "r": "0x1b5e176d927f8e9ab405058b2d2457392da3e20f328b16ddabcebc33eaac5fea",
    "s": "0x4ba69724e8f69de52f0125ad8b3c5c2cef33019bac3249e2c0a2192766d1721c",
    "to": "0xf02c1c8e6114b1dbe8937a39260b5b0a374432bb",
    "transactionIndex": "0x41",
    "v": "0x25",
    "value": "0xf3dbb76162000"
  }
}
eth_getTransactionCount
Returns the number of transactions sent from an address.
Parameters
DATA, 20 Bytes - address.
QUANTITY|TAG - integer block number, or the string "latest", "earliest" or "pending", see the default block parameter.
params: [
    '0xc94770007dda54cF92009BFF0dE90c06F603a09f',
    'latest' // state at the latest block
]
Returns
QUANTITY - integer of the number of transactions send from this address.
​Example​
Request
Curl
Postman
Curl
curl https://arb-mainnet.g.alchemy.com/v2/your-api-key \
-X POST \
-H "Content-Type: application/json" \
-d '{"jsonrpc":"2.0","method":"eth_getTransactionCount","params":["0xc94770007dda54cF92009BFF0dE90c06F603a09f","latest"],"id":0}'
Postman
URL: https://arb-mainnet.g.alchemy.com/v2/your-api-key
RequestType: POST
Body: 
{
    "jsonrpc":"2.0",
    "method":"eth_getTransactionCount",
    "params":["0xc94770007dda54cF92009BFF0dE90c06F603a09f","latest"],
    "id":0
}
Result
{
  "jsonrpc": "2.0",
  "id": 0,
  "result": "0x219"
}
eth_getTransactionReceipt
Returns the receipt of a transaction by transaction hash. 
This can also be used to track the status of a transaction, since result will be null until the transaction is mined. However, unlike eth_getTransactionByHash , which returns null for unknown transactions, and a non-null response with 3 null fields for a pending transaction, eth_getTransactionReceipt returns null for both pending and unknown transactions. 
This call is also commonly used to get the contract address for a contract creation tx.
Note: the receipt is not available for pending transactions.
Parameters
DATA, 32 Bytes - hash of a transaction 
params: [ 
    '0xab059a62e22e230fe0f56d8555340a29b2e9532360368f810595453f6fdd213b' 
]
Returns
Object - A transaction receipt object, or null when no receipt was found:
transactionHash: DATA, 32 Bytes - hash of the transaction.
transactionIndex: QUANTITY - integer of the transactions index position in the block.
blockHash: DATA, 32 Bytes - hash of the block where this transaction was in.
blockNumber: QUANTITY - block number where this transaction was in.
from: DATA, 20 Bytes - address of the sender.
to: DATA, 20 Bytes - address of the receiver. null when its a contract creation transaction.
cumulativeGasUsed: QUANTITY - The total amount of gas used when this transaction was executed in the block.
gasUsed: QUANTITY - The amount of gas used by this specific transaction alone.
contractAddress: DATA, 20 Bytes - The contract address created, if the transaction was a contract creation, otherwise null.
logs: Array - Array of log objects, which this transaction generated.
logsBloom: DATA, 256 Bytes - Bloom filter for light clients to quickly retrieve related logs.
It also returns either:
root : DATA 32 bytes of post-transaction stateroot (pre Byzantium)
status: QUANTITY either 1 (success) or 0 (failure)
​Example​
Request
Curl
Postman
Curl
curl https://arb-mainnet.g.alchemy.com/v2/your-api-key \
-X POST \
-H "Content-Type: application/json" \
-d '{"jsonrpc":"2.0","method":"eth_getTransactionReceipt","params":["0xab059a62e22e230fe0f56d8555340a29b2e9532360368f810595453f6fdd213b"],"id":0}
Postman
URL: https://arb-mainnet.g.alchemy.com/v2/your-api-key
RequestType: POST
Body: 
{
    "jsonrpc":"2.0",
    "method":"eth_getTransactionReceipt",
    "params":["0xab059a62e22e230fe0f56d8555340a29b2e9532360368f810595453f6fdd213b"],
    "id":0
}
Result
{
  "jsonrpc": "2.0",
  "id": 0,
  "result": {
    "transactionHash": "0xab059a62e22e230fe0f56d8555340a29b2e9532360368f810595453f6fdd213b",
    "blockHash": "0x8243343df08b9751f5ca0c5f8c9c0460d8a9b6351066fae0acbd4d3e776de8bb",
    "blockNumber": "0x429d3b",
    "contractAddress": null,
    "cumulativeGasUsed": "0x64b559",
    "from": "0x00b46c2526e227482e2ebb8f4c69e4674d262e75",
    "gasUsed": "0xcaac",
    "logs": [
      {
        "blockHash": "0x8243343df08b9751f5ca0c5f8c9c0460d8a9b6351066fae0acbd4d3e776de8bb",
        "address": "0xb59f67a8bff5d8cd03f6ac17265c550ed8f33907",
        "logIndex": "0x56",
        "data": "0x000000000000000000000000000000000000000000000000000000012a05f200",
        "removed": false,
        "topics": [
          "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef",
          "0x00000000000000000000000000b46c2526e227482e2ebb8f4c69e4674d262e75",
          "0x00000000000000000000000054a2d42a40f51259dedd1978f6c118a0f0eff078"
        ],
        "blockNumber": "0x429d3b",
        "transactionIndex": "0xac",
        "transactionHash": "0xab059a62e22e230fe0f56d8555340a29b2e9532360368f810595453f6fdd213b"
      }
    ],
    "logsBloom": "0x00000000040000000000000000000000000000000000000000000000000000080000000010000000000000000000000000000000000040000000000000000000000000000000000000000008000000000000000000000000000000000000000000000000000000000000000000002000000000000000000000000010000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000010100000000000000000000000000004000000000000200000000000000000000000000000000000000000000",
    "root": "0x3ccba97c7fcc7e1636ce2d44be1a806a8999df26eab80a928205714a878d5114",
    "status": null,
    "to": "0xb59f67a8bff5d8cd03f6ac17265c550ed8f33907",
    "transactionIndex": "0xac"
  }
}
eth_getBlockTransactionCountByHash
Returns the number of transactions in a block matching the given block hash.
Parameters
DATA, 32 Bytes - hash of a block.
params: [ 
    '0x8243343df08b9751f5ca0c5f8c9c0460d8a9b6351066fae0acbd4d3e776de8bb' 
]
Returns
QUANTITY - integer of the number of transactions in this block.
​Example​
Request
Curl
Postman
Curl
curl https://arb-mainnet.g.alchemy.com/v2/your-api-key \
-X POST \
-H "Content-Type: application/json" \
-d '{"jsonrpc":"2.0","method":"eth_getBlockTransactionCountByHash","params":["0x8243343df08b9751f5ca0c5f8c9c0460d8a9b6351066fae0acbd4d3e776de8bb"],"id":0}'
Postman
URL: https://arb-mainnet.g.alchemy.com/v2/your-api-key
RequestType: POST
Body: 
{
    "jsonrpc":"2.0",
    "method":"eth_getBlockTransactionCountByHash",
    "params":["0x8243343df08b9751f5ca0c5f8c9c0460d8a9b6351066fae0acbd4d3e776de8bb"],
    "id":0
}
Result
{
  "jsonrpc": "2.0",
  "id": 0,
  "result": "0xb0"
}
eth_getBlockTransactionCountByNumber
Returns the number of transactions in a block matching the given block number.
Parameters
QUANTITY|TAG - integer of a block number, or the string "earliest", "latest" or "pending", as in the default block parameter.
params: [
    'latest',
]
Returns
QUANTITY - integer of the number of transactions in this block.
​Example​
Request
Curl
Postman
Curl
curl https://arb-mainnet.g.alchemy.com/v2/your-api-key \
-X POST \
-H "Content-Type: application/json" \
-d '{"jsonrpc":"2.0","method":"eth_getBlockTransactionCountByNumber","params":["latest"],"id":0}'
Postman
URL: https://arb-mainnet.g.alchemy.com/v2/your-api-key
RequestType: POST
Body: 
{
    "jsonrpc":"2.0",
    "method":"eth_getBlockTransactionCountByNumber",
    "params":["latest"],
    "id":0
}
Result
{
  "jsonrpc": "2.0",
  "id": 0,
  "result": "0xee"
}
eth_getTransactionByBlockHashAndIndex
Returns information about a transaction by block hash and transaction index position.
Parameters
DATA, 32 Bytes - hash of a block. 
QUANTITY - integer of the transaction index position. 
params: [ 
    '0xc0f4906fea23cf6f3cce98cb44e8e1449e455b28d684dfa9ff65426495584de6', 
    '0x0' // 0 
]
Returns
See eth_getTransactionByHash​
​Example​
Request
Curl
Postman
Curl
curl https://arb-mainnet.g.alchemy.com/v2/your-api-key \
-X POST \
-H "Content-Type: application/json" \
-d '{"jsonrpc":"2.0","method":"eth_getTransactionByBlockHashAndIndex","params":["0xc0f4906fea23cf6f3cce98cb44e8e1449e455b28d684dfa9ff65426495584de6", "0x0"],"id":0}'
Postman
URL: https://arb-mainnet.g.alchemy.com/v2/your-api-key
RequestType: POST
Body: 
{
    "jsonrpc":"2.0",
    "method":"eth_getTransactionByBlockHashAndIndex",
    "params":["0xc0f4906fea23cf6f3cce98cb44e8e1449e455b28d684dfa9ff65426495584de6", "0x0"],
    "id":0
}
Result
{
  "jsonrpc": "2.0",
  "id": 0,
  "result": {
    "blockHash": "0xc0f4906fea23cf6f3cce98cb44e8e1449e455b28d684dfa9ff65426495584de6",
    "blockNumber": "0x1e8480",
    "from": "0x32be343b94f860124dc4fee278fdcbd38c102d88",
    "gas": "0x51615",
    "gasPrice": "0x6fc23ac00",
    "hash": "0xc55e2b90168af6972193c1f86fa4d7d7b31a29c156665d15b9cd48618b5177ef",
    "input": "0x",
    "nonce": "0x1efc5",
    "to": "0x104994f45d9d697ca104e5704a7b77d7fec3537c",
    "transactionIndex": "0x0",
    "value": "0x821878651a4d70000",
    "v": "0x1b",
    "r": "0x51222d91a379452395d0abaff981af4cfcc242f25cfaf947dea8245a477731f9",
    "s": "0x3a997c910b4701cca5d933fb26064ee5af7fe3236ff0ef2b58aa50b25aff8ca5"
  }
}
eth_getTransactionByBlockNumberAndIndex
Returns information about a transaction by block number and transaction index position.
Parameters
QUANTITY|TAG - a block number, or the string "earliest", "latest" or "pending", as in the default block parameter.
QUANTITY - the transaction index position.
 params: [ 
     'latest', // 668 
     '0x0' // 0 
 ]
Returns
See eth_getTransactionByHash​
​Example​
Request
Curl
Postman
Curl
curl https://arb-mainnet.g.alchemy.com/v2/your-api-key \
-X POST \
-H "Content-Type: application/json" \
-d '{"jsonrpc":"2.0","method":"eth_getTransactionByBlockNumberAndIndex","params":["latest", "0x0"],"id":0}'
Postman
URL: https://arb-mainnet.g.alchemy.com/v2/your-api-key
RequestType: POST
Body: 
{
    "jsonrpc":"2.0",
    "method":"eth_getTransactionByBlockNumberAndIndex",
    "params":["latest", "0x0"],
    "id":0
}
Result
{
  "jsonrpc": "2.0",
  "id": 0,
  "result": {
    "blockHash": "0xf345d6ac2cb6290489915178fef0b2fc7f5a7312dd06773c77532de6740b2b4d",
    "blockNumber": "0xa1c0ff",
    "from": "0x79c384ac9c32e90f00a214c77caac1392ec8cdea",
    "gas": "0xafbe",
    "gasPrice": "0x1270b01800",
    "hash": "0x61b27f711f58ee3090c0976c7e90d2b7eafeb7b889f0db593234f04f8ce07f22",
    "input": "0xa9059cbb0000000000000000000000004b1a99467a284cc690e3237bc69105956816f7620000000000000000000000000000000000000000000000000000001919617600",
    "nonce": "0xa",
    "to": "0xf9e5af7b42d31d51677c75bbbd37c1986ec79aee",
    "transactionIndex": "0x0",
    "value": "0x0",
    "v": "0x1b",
    "r": "0x2123cdbd1130f726ebed55fd2295239778dd4161495d2733f374d7863fc42ab1",
    "s": "0x1f08fd53ff2c3969b88d5e622561d62a799ae68e36f5142689dbfde44bbe1bed"
  }
}
​✍ Writing Transactions 
Call to write to the blockchain. 
eth_sendRawTransaction
Creates a new message call transaction or a contract creation for signed transactions.
Alchemy does not store keys, so transactions sent via Alchemy must be signed ahead of time using another provider like ethers (via eth_signTransaction) and sent with eth_sendRawTransaction.
Parameters
DATA, The signed transaction data. 
params: ["0xd46e8dd67c5d32be8d46e8dd67c5d32be8058bb8eb970870f072445675058bb8eb970870f072445675"]
Returns
DATA, 32 Bytes - the transaction hash, or the zero hash if the transaction is not yet available. 
Use eth_getTransactionReceipt to get the contract address after the transaction was mined when you created a contract.
​Example​
Note: Since eth_sendRawTransaction is a request used for writing to the blockchain and changes its state, it is impossible to execute the same request twice. This means if you were to copy the example given below you will not get the expected response. 
Request
Curl
Postman
Curl
curl https://arb-mainnet.g.alchemy.com/v2/your-api-key \
-X POST \
-H "Content-Type: application/json" \
-d '{"jsonrpc":"2.0","method":"eth_sendRawTransaction","params":["0xd46e8dd67c5d32be8d46e8dd67c5d32be8058bb8eb970870f072445675058bb8eb970870f072445675"],"id":1}'
Postman
URL: https://arb-mainnet.g.alchemy.com/v2/your-api-key
RequestType: POST
Body: 
{
    "jsonrpc":"2.0",
    "method":"eth_sendRawTransaction",
    "params":["0xd46e8dd67c5d32be8d46e8dd67c5d32be8058bb8eb970870f072445675058bb8eb970870f072445675"],
    "id":1
}
Result
{
  "id":1,
  "jsonrpc": "2.0",
  "result": "0xe670ec64341771606e55d6b4ca35a1a6b75ee3d5145a99d05921026d1527331"
}
​📂 Account Information 
Calls to get information about an account. 
eth_getBalance
Returns the balance of the account of a given address. 
Parameters
DATA, 20 Bytes - address to check for balance.
QUANTITY|TAG - integer block number, or the string "latest", "earliest" or "pending", see the default block parameter.
params: [
   '0xc94770007dda54cF92009BFF0dE90c06F603a09f',
   'latest'
]
Returns
QUANTITY - integer of the current balance for the given address in wei. 
​Example​
Request
Curl
Postman
Curl
curl https://arb-mainnet.g.alchemy.com/v2/your-api-key \
-X POST \
-H "Content-Type: application/json" \
-d '{"jsonrpc":"2.0","method":"eth_getBalance","params":["0xc94770007dda54cF92009BFF0dE90c06F603a09f", "latest"],"id":0}'
Postman
URL: https://arb-mainnet.g.alchemy.com/v2/your-api-key
RequestType: POST
Body: 
{
    "jsonrpc":"2.0",
    "method":"eth_getBalance",
    "params":["0xc94770007dda54cF92009BFF0dE90c06F603a09f", "latest"],
    "id":0
}
Result
{
  "jsonrpc": "2.0",
  "id": 0,
  "result": "0x7c2562030800"
}
eth_getCode
Returns code at a given address. This method can be used to distinguish between contract addresses and wallet addresses. 
Parameters
DATA, 20 Bytes - address.
QUANTITY|TAG - integer block number, or the string "latest", "earliest" or "pending", see the default block parameter.
params: [
    '0xb59f67a8bff5d8cd03f6ac17265c550ed8f33907',
    'latest'
]
Returns
DATA - the code from the given address.
​Example​
Request
Curl
Postman
Curl
curl https://arb-mainnet.g.alchemy.com/v2/your-api-key \
-X POST \
-H "Content-Type: application/json" \
-d '{"jsonrpc":"2.0","method":"eth_getCode","params":["0xb59f67a8bff5d8cd03f6ac17265c550ed8f33907", "latest"],"id":0}'
Postman
URL: https://arb-mainnet.g.alchemy.com/v2/your-api-key
RequestType: POST
Body: 
{
    "jsonrpc":"2.0",
    "method":"eth_getCode",
    "params":["0xb59f67a8bff5d8cd03f6ac17265c550ed8f33907", "latest"],
    "id":0
}
Result
{
  "jsonrpc": "2.0",
  "id": 0,
  "result": "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"
}
eth_getStorageAt
Returns the value from a storage position at a given address, or in other words, returns the state of the contract's storage, which may not be exposed via the contract's methods. 
Parameters
DATA, 20 Bytes - address of the storage.
QUANTITY - integer of the position in the storage.
QUANTITY|TAG - integer block number, or the string "latest", "earliest" or "pending", see the default block parameter.
Returns
DATA - the value at this storage position.
Example
Calculating the correct position depends on the storage to retrieve. Consider the following contract deployed at 0x295a70b2de5e3953354a6a8344e616ed314d7251 by address 0x391694e7e0b0cce554cb130d723a9d27458f9298. 
contract Storage {
    uint pos0;
    mapping(address => uint) pos1;
​
    function Storage() {
        pos0 = 1234;
        pos1[msg.sender] = 5678;
    }
}
Retrieving the value of pos0 is straight forward: 
​Request​
Curl
Postman
Curl
curl https://arb-mainnet.g.alchemy.com/v2/your-api-key \
-X POST \
-H "Content-Type: application/json" \
-d '{"jsonrpc":"2.0", "method": "eth_getStorageAt", "params": ["0x295a70b2de5e3953354a6a8344e616ed314d7251", "0x0", "latest"], "id": 1}'
Postman
URL: https://arb-mainnet.g.alchemy.com/v2/your-api-key
RequestType: POST
Body: 
{
    "jsonrpc":"2.0",
    "method":"eth_getStorageAt",
    "params":["0x295a70b2de5e3953354a6a8344e616ed314d7251", "0x0", "latest"],
    "id":1
}
Result
{
    "jsonrpc":"2.0",
    "id":1,
    "result":"0x00000000000000000000000000000000000000000000000000000000000004d2"
}
Retrieving an element of the map is harder. The position of an element in the map is calculated with:
keccack(LeftPad32(key, 0), LeftPad32(map position, 0))
This means to retrieve the storage on pos1[“0x391694e7e0b0cce554cb130d723a9d27458f9298”] we need to calculate the position with:
keccak(decodeHex("000000000000000000000000391694e7e0b0cce554cb130d723a9d27458f9298" + "0000000000000000000000000000000000000000000000000000000000000001"))
The geth console which comes with the web3 library can be used to make the calculation:
> var key = "000000000000000000000000391694e7e0b0cce554cb130d723a9d27458f9298" + "0000000000000000000000000000000000000000000000000000000000000001"
undefined
> web3.sha3(key, {"encoding": "hex"})
"0x6661e9d6d8b923d5bbaab1b96e1dd51ff6ea2a93520fdc9eb75d059238b8c5e9"
Now to fetch the storage:
​Request​
Curl
Postman
Curl
curl https://arb-mainnet.g.alchemy.com/v2/your-api-key \
-X POST \
-H "Content-Type: application/json" \
-d '{"jsonrpc":"2.0", "method": "eth_getStorageAt", "params": ["0x295a70b2de5e3953354a6a8344e616ed314d7251", "0x6661e9d6d8b923d5bbaab1b96e1dd51ff6ea2a93520fdc9eb75d059238b8c5e9", "latest"], "id": 1}'
Postman
URL: https://arb-mainnet.g.alchemy.com/v2/your-api-key
RequestType: POST
Body: 
{
    "jsonrpc":"2.0",
    "method":"eth_getStorageAt",
    "params":["0x295a70b2de5e3953354a6a8344e616ed314d7251", "0x6661e9d6d8b923d5bbaab1b96e1dd51ff6ea2a93520fdc9eb75d059238b8c5e9", "latest"],
    "id":1
}
Result
{
    "jsonrpc":"2.0",
    "id":1,
    "result":"0x000000000000000000000000000000000000000000000000000000000000162e"
}
eth_accounts
Returns a list of addresses owned by client.
Since Alchemy does not store keys, this will always return empty.
Parameters
none
Returns
Array of DATA, 20 Bytes - addresses owned by the client.
​Example​
Request
Curl
Postman
Curl
curl https://arb-mainnet.g.alchemy.com/v2/your-api-key \
-X POST \
-H "Content-Type: application/json" \
-d '{"jsonrpc":"2.0","method":"eth_accounts","params":[],"id":1}'
Postman
URL: https://arb-mainnet.g.alchemy.com/v2/your-api-key
RequestType: POST
Body: 
{
    "jsonrpc":"2.0",
    "method":"eth_accounts",
    "params":[],
    "id":1
}
Result
{
  "id":1,
  "jsonrpc": "2.0",
  "result": []
}
​🧠 EVM/Smart Contract Execution
eth_call
Executes a new message call immediately without creating a transaction on the block chain. 
This is one of the most commonly used API calls. It is used to read from the blockchain which includes executing smart contracts, but does not publish anything to the blockchain. This call does not consume any Ether. 
Starting from Geth 1.9.13, eth_callwill check the balance of the sender (to make sure that the sender has enough gas to complete the request) before executing the call. This means that even though the call doesn't consume any gas, the from address must have enough gas to execute the call as if it were a transaction. 
Parameters
Object - The transaction call object
from: DATA, 20 Bytes - (optional) The address the transaction is sent from.
to: DATA, 20 Bytes - The address the transaction is directed to.
gas: QUANTITY - (optional) Integer of the gas provided for the transaction execution. eth_call consumes zero gas, but this parameter may be needed by some executions. 
gasPrice: QUANTITY - (optional) Integer of the gasPrice used for each paid gas. Note: most of our users (95%+) never set the gasPrice on eth_call.
value: QUANTITY - (optional) Integer of the value sent with this transaction
data: DATA - (optional) Hash of the method signature and encoded parameters. For details see the Contract ABI
QUANTITY|TAG - integer block number, or the string "latest", "earliest" or "pending", see the default block parameter.
Note: eth_call has a timeout restriction at the node level. Batching multiple eth_calls together on-chain using pre-deployed smart contracts might result in unexpected timeouts that cause none of your calls to complete. Instead, consider serializing these calls, or using smaller batches if they fail with a node error code. 
params: [
    {
        "from": "0xb60e8dd61c5d32be8058bb8eb970870f07233155",
        "to": "0xd46e8dd67c5d32be8058bb8eb970870f07244567",
        "gas": "0x76c0",
        "gasPrice": "0x9184e72a000",
        "value": "0x9184e72a",
        "data": "0xd46e8dd67c5d32be8d46e8dd67c5d32be8058bb8eb970870f072445675058bb8eb970870f072445675"
    }, 
    "latest"]
]
Returns
DATA - the return value of executed contract.
​Example​
Request
Curl
Postman
Curl
curl https://arb-mainnet.g.alchemy.com/v2/your-api-key \
-X POST \
-H "Content-Type: application/json" \
-d '{"jsonrpc":"2.0","method":"eth_call","params":[{"from": "0xb60e8dd61c5d32be8058bb8eb970870f07233155","to": "0xd46e8dd67c5d32be8058bb8eb970870f07244567","gas": "0x76c0","gasPrice": "0x9184e72a000","value": "0x9184e72a","data": "0xd46e8dd67c5d32be8d46e8dd67c5d32be8058bb8eb970870f072445675058bb8eb970870f072445675"}, "latest"],"id":1}'
Postman
URL: https://arb-mainnet.g.alchemy.com/v2/your-api-key
RequestType: POST
Body: 
{
    "jsonrpc":"2.0",
    "method":"eth_call",
    "params":[{"from": "0xb60e8dd61c5d32be8058bb8eb970870f07233155","to": "0xd46e8dd67c5d32be8058bb8eb970870f07244567","gas": "0x76c0","gasPrice": "0x9184e72a000","value": "0x9184e72a","data": "0xd46e8dd67c5d32be8d46e8dd67c5d32be8058bb8eb970870f072445675058bb8eb970870f072445675"}, "latest"],
    "id":1
}
Result
{
  "jsonrpc": "2.0",
  "id": 1,
  "result": "0x"
}
​📑 Event Logs
eth_getLogs
Returns an array of all logs matching a given filter object. For more information about eth_getLogs check out our Deep Dive into eth_getLogs page. 
NOTE: You can make eth_getLogs requests with up to a 2K block range and no limit on the response size.
If you absolutely need to query larger block ranges, please contact us over discord or at [email protected] We can open access to larger block ranges based on your use case.
If you need to pull logs frequently, we recommend using WebSockets to push new logs to you when they are available. 
Parameters
Object - The filter options:
fromBlock: QUANTITY|TAG - (optional, default: "latest") Value:
Integer block number
"latest" for the last mined block
"pending", "earliest" for not yet mined transactions.
toBlock: QUANTITY|TAG - (optional, default: "latest") Value:
Integer block number
"latest" for the last mined block
"pending", "earliest" for not yet mined transactions.
address: DATA|Array, 20 Bytes - (optional) Contract address or a list of addresses from which logs should originate.
topics: Array of DATA, - (optional) Array of 32 Bytes DATA topics. 
Topics are order-dependent. Each topic can also be an array of DATA with "or" options. 
Check out more details on how to format topics in eth_newFilter.
blockHash: DATA, 32 Bytes - (optional) With the addition of EIP-234 (Geth >= v1.8.13 or Parity >= v2.1.0), blockHash is a new filter option which restricts the logs returned to the single block with the 32-byte hash blockHash. Using blockHash is equivalent to fromBlock = toBlock = the block number with hash blockHash. If blockHash is present in the filter criteria, then neither fromBlock nor toBlock are allowed.
params: [
  {
    "address": "0xb59f67a8bff5d8cd03f6ac17265c550ed8f33907",
    "topics": [
      "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef"
    ],
    "blockHash": "0x8243343df08b9751f5ca0c5f8c9c0460d8a9b6351066fae0acbd4d3e776de8bb"
  }
]
Returns
See eth_getFilterChanges​
​Example​
Request
Curl
Postman
Curl
curl https://arb-mainnet.g.alchemy.com/v2/your-api-key \
-X POST \
-H "Content-Type: application/json" \
-d '{"jsonrpc":"2.0","method":"eth_getLogs","params":[{"address": "0xb59f67a8bff5d8cd03f6ac17265c550ed8f33907","topics": ["0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef"],"blockHash": "0x8243343df08b9751f5ca0c5f8c9c0460d8a9b6351066fae0acbd4d3e776de8bb"}],"id":0}'
Postman
URL: https://arb-mainnet.g.alchemy.com/v2/your-api-key
RequestType: POST
Body: 
{
    "jsonrpc":"2.0",
    "method":"eth_getLogs",
    "params":[{"address": "0xb59f67a8bff5d8cd03f6ac17265c550ed8f33907","topics": ["0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef"],"blockHash": "0x8243343df08b9751f5ca0c5f8c9c0460d8a9b6351066fae0acbd4d3e776de8bb"}],
    "id":0
}
Result
{
  "jsonrpc": "2.0",
  "id": 0,
  "result": [
    {
      "address": "0xb59f67a8bff5d8cd03f6ac17265c550ed8f33907",
      "topics": [
        "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef",
        "0x00000000000000000000000000b46c2526e227482e2ebb8f4c69e4674d262e75",
        "0x00000000000000000000000054a2d42a40f51259dedd1978f6c118a0f0eff078"
      ],
      "data": "0x000000000000000000000000000000000000000000000000000000012a05f200",
      "blockNumber": "0x429d3b",
      "transactionHash": "0xab059a62e22e230fe0f56d8555340a29b2e9532360368f810595453f6fdd213b",
      "transactionIndex": "0xac",
      "blockHash": "0x8243343df08b9751f5ca0c5f8c9c0460d8a9b6351066fae0acbd4d3e776de8bb",
      "logIndex": "0x56",
      "removed": false
    }
  ]
}
​⛓ Chain Information
Calls to receive information about the current blockchain. 
eth_gasPrice
Returns the current price per gas in wei. 
If you are curious about the difference in gas price between this method and the eth gas station, check out this GitHub issue.
Parameters
none
Returns
QUANTITY - integer of the current gas price in wei. 
​Example​
Request
Curl
Postman
Curl
curl https://arb-mainnet.g.alchemy.com/v2/your-api-key \
-X POST \
-H "Content-Type: application/json" \
-d '{"jsonrpc":"2.0","method":"eth_gasPrice","params":[],"id":0}'
Postman
URL: https://arb-mainnet.g.alchemy.com/v2/your-api-key
RequestType: POST
Body: 
{
    "jsonrpc":"2.0",
    "method":"eth_gasPrice",
    "params":[],
    "id":0
}
Result
{
  "jsonrpc": "2.0",
  "id": 0,
  "result": "0x98bca5a00"
}
eth_estimateGas
Generates and returns an estimate of how much gas is necessary to allow the transaction to complete. The transaction will not be added to the blockchain. 
Note: The estimate may be significantly more than the amount of gas actually used by the transaction, for a variety of reasons including EVM mechanics and node performance. Estimates are served directly from nodes, we're not doing anything special to the value so the rest of the network is likely seeing the same.
Parameters
Object - The transaction call object
from: DATA, 20 Bytes - (optional) The address the transaction is sent from.
to: DATA, 20 Bytes - The address the transaction is directed to.
gas: QUANTITY - (optional) Integer of the gas provided for the transaction execution. eth_call consumes zero gas, but this parameter may be needed by some executions. 
gasPrice: QUANTITY - (optional) Integer of the gasPrice used for each paid gas. Note: most of our users (95%+) never set the gasPrice on eth_call.
value: QUANTITY - (optional) Integer of the value sent with this transaction
data: DATA - (optional) Hash of the method signature and encoded parameters. For details see the Contract ABI
QUANTITY|TAG - integer block number, or the string "latest", "earliest" or "pending", see the default block parameter.
NOTE
eth_estimateGas will check the balance of the sender (to make sure that the sender has enough gas to complete the request). This means that even though the call doesn't consume any gas, the from address must have enough gas to execute the transaction.
If no gas is specified geth uses the block gas limit from the pending block as an upper bound. As a result the returned estimate might not be enough to executed the call/transaction when the amount of actual gas needed is higher than the pending block gas limit.
Returns
QUANTITY - the amount of gas used.
​Example​
Request
Curl
Postman
Curl
curl https://arb-mainnet.g.alchemy.com/v2/your-api-key \
-X POST \
-H "Content-Type: application/json" \
-d '{"jsonrpc":"2.0","method":"eth_estimateGas","params":[{see above}],"id":1}'
Postman
URL: https://arb-mainnet.g.alchemy.com/v2/your-api-key
RequestType: POST
Body: 
{
    "jsonrpc":"2.0",
    "method":"eth_estimateGas",
    "params":[{see above}],
    "id":1
}
Result
{
  "id":1,
  "jsonrpc": "2.0",
  "result": "0x5208" // 21000
}
eth_chainId
Returns the currently configured chain ID, a value used in replay-protected transaction signing as introduced by EIP-155.
The chain ID returned should always correspond to the information in the current known head block. This ensures that caller of this RPC method can always use the retrieved information to sign transactions built on top of the head.
If the current known head block does not specify a chain ID, the client should treat any calls to eth_chainId as though the method were not supported, and return a suitable error.
You should prefer eth_chainId over net_version, so that you can reliably identify the chain you are communicating with.
Parameters
None.
Returns
QUANTITY - integer of the current chain ID.
Example
Request
Curl
Postman
Curl
curl https://arb-mainnet.g.alchemy.com/v2/your-api-key \
-X POST \
-H "Content-Type: application/json" \
-d '{"jsonrpc":"2.0","method":"eth_chainId","params":[],"id":83}'
Postman
URL: https://arb-mainnet.g.alchemy.com/v2/your-api-key
RequestType: POST
Body: 
{
    "jsonrpc":"2.0",
    "method":"eth_chainId",
    "params":[],
    "id":83
}
Result
{
  "id": 83,
  "jsonrpc": "2.0",
  "result": "0x3d" // 61
}
net_version
Returns the current network id.
Parameters
none
Returns
String - The current network id.
"1": Ethereum Mainnet
"2": Morden Testnet (deprecated)
"3": Ropsten Testnet
"4": Rinkeby Testnet
"42": Kovan Testnet
​Example​
Request
Curl
Postman
Curl
curl https://arb-mainnet.g.alchemy.com/v2/your-api-key \
-X POST \
-H "Content-Type: application/json" \
-d '{"jsonrpc":"2.0","method":"net_version","params":[],"id":67}'
Postman
URL: https://arb-mainnet.g.alchemy.com/v2/your-api-key
RequestType: POST
Body: 
{
    "jsonrpc":"2.0",
    "method":"net_version",
    "params":[],
    "id":67
}
Result
{
  "id":67,
  "jsonrpc": "2.0",
  "result": "3"
}
​🔦 Filters
Calls related to creating, getting, and reading from filters. 
Eth filters expose the same information as the eth_subscribe methods, except that updates are received by polling rather than receiving pushes. A user may create a filter than repeatedly call eth_getFilterChangeson it, each time receiving events that have occurred since the last time eth_getFilterChangeswas called (or since the filter was created if this is the first time eth_getFilterChangesis being called.
Note: Filters expire after 5 minutes of inactivity, so several of the example requests below will return"filter not found" if you try and call them. 
eth_getFilterChanges
Polling method for a filter, which returns an array of logs which occurred since last poll.
Parameters
QUANTITY - the filter id.
params: [
  "0xfe704947a3cd3ca12541458a4321c869"
]
Returns
Array - Array of log objects, or an empty array if nothing has changed since last poll.
For filters created with eth_newBlockFilter the return are block hashes (DATA, 32 Bytes), e.g. ["0x3454645634534..."].
For filters created with eth_newPendingTransactionFilter  the return are transaction hashes (DATA, 32 Bytes), e.g. ["0x6345343454645..."].
For filters created with eth_newFilter logs are objects with following params:
removed: TAG - true when the log was removed, due to a chain reorganization. false if its a valid log.
logIndex: QUANTITY - integer of the log index position in the block. null when its pending log.
transactionIndex: QUANTITY - integer of the transactions index position log was created from. null when its pending log.
transactionHash: DATA, 32 Bytes - hash of the transactions this log was created from. null when its pending log.
blockHash: DATA, 32 Bytes - hash of the block where this log was in. null when its pending. null when its pending log.
blockNumber: QUANTITY - the block number where this log was in. null when its pending. null when its pending log.
address: DATA, 20 Bytes - address from which this log originated.
data: DATA - contains one or more 32 Bytes non-indexed arguments of the log.
topics: Array of DATA - Array of 0 to 4 32 Bytes DATA of indexed log arguments. 
In solidity: The first topic is the hash of the signature of the event (e.g. Deposit(address,bytes32,uint256)), except you declare the event with the anonymous specifier.
​Example​
Request
Curl
Postman
Curl
curl https://eth-mainnet.alchemyapi.io/v2/your-api-key \
-X POST \
-H "Content-Type: application/json" \
-d '{"jsonrpc":"2.0","method":"eth_getFilterChanges","params":["0xfe704947a3cd3ca12541458a4321c869"],"id":73}'
Postman
URL: https://eth-mainnet.alchemyapi.io/v2/your-api-key
RequestType: POST
Body: 
{
    "jsonrpc":"2.0",
    "method":"eth_getFilterChanges",
    "params":["0xfe704947a3cd3ca12541458a4321c869"],
    "id":73
}
Result
{
    "jsonrpc": "2.0",
    "id": 73,
    "result": [{
        "address": "0xb5a5f22694352c15b00323844ad545abb2b11028",
        "blockHash": "0x99e8663c7b6d8bba3c7627a17d774238eae3e793dee30008debb2699666657de",
        "blockNumber": "0x5d12ab",
        "data": "0x0000000000000000000000000000000000000000000000a247d7a2955b61d000",
        "logIndex": "0x0",
        "removed": false,
        "topics": ["0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef", "0x000000000000000000000000bdc0afe57b8e9468aa95396da2ab2063e595f37e", "0x0000000000000000000000007503e090dc2b64a88f034fb45e247cbd82b8741e"],
        "transactionHash": "0xa74c2432c9cf7dbb875a385a2411fd8f13ca9ec12216864b1a1ead3c99de99cd",
        "transactionIndex": "0x3"
    }, {
        "address": "0xe38165c9f6deb144afc9c32c206b024817e1496d",
        "blockHash": "0x99e8663c7b6d8bba3c7627a17d774238eae3e793dee30008debb2699666657de",
        "blockNumber": "0x5d12ab",
        "data": "0x0000000000000000000000000000000000000000000000000000000025c6b720",
        "logIndex": "0x3",
        "removed": false,
        "topics": ["0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef", "0x00000000000000000000000080e73e47173b2d00b531bf83bc39e710157125c3", "0x0000000000000000000000008f6cc93795969e5bbbf07c66dfee7d41ad24f1ef"],
        "transactionHash": "0x9e8f1cb1facb9a11a1cf947634053a0b2d557399f926b12127aa10497a2f0153",
        "transactionIndex": "0x5"
    }
}
eth_getFilterLogs
Returns an array of all logs matching filter with given id. Can compute the same results with an eth_getLogs call (see hint below). 
This method only works for filters creates with eth_newFilternot for filters created using eth_newBlockFilter or eth_newPendingTransactionFilter, which will return "filter not found".
eth_getLogs vs. eth_getFilterLogs
These two computations will return the same results:
Calling eth_getLogs with params [<options>]
Calling eth_newFilter with params [<options>], getting a filter id <filterId> back, then calling eth_getFilterLogs with params [<filterId>]
Parameters
QUANTITY - The filter id.
params: [
  "0xfe704947a3cd3ca12541458a4321c869"
]
Returns
See eth_getFilterChanges​
​Example​
Request
Curl
Postman
Curl
curl https://eth-mainnet.alchemyapi.io/v2/your-api-key \
-X POST \
-H "Content-Type: application/json" \
-d '{"jsonrpc":"2.0","method":"eth_getFilterLogs","params":["0xfe704947a3cd3ca12541458a4321c869"],"id":74}'
Postman
URL: https://eth-mainnet.alchemyapi.io/v2/your-api-key
RequestType: POST
Body: 
{
    "jsonrpc":"2.0",
    "method":"eth_getFilterLogs",
    "params":["0xfe704947a3cd3ca12541458a4321c869"],
    "id":74
}
Result
{
    "jsonrpc": "2.0",
    "id": 73,
    "result": [{
        "address": "0xb5a5f22694352c15b00323844ad545abb2b11028",
        "blockHash": "0x99e8663c7b6d8bba3c7627a17d774238eae3e793dee30008debb2699666657de",
        "blockNumber": "0x5d12ab",
        "data": "0x0000000000000000000000000000000000000000000000a247d7a2955b61d000",
        "logIndex": "0x0",
        "removed": false,
        "topics": ["0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef", "0x000000000000000000000000bdc0afe57b8e9468aa95396da2ab2063e595f37e", "0x0000000000000000000000007503e090dc2b64a88f034fb45e247cbd82b8741e"],
        "transactionHash": "0xa74c2432c9cf7dbb875a385a2411fd8f13ca9ec12216864b1a1ead3c99de99cd",
        "transactionIndex": "0x3"
    }, {
        "address": "0xe38165c9f6deb144afc9c32c206b024817e1496d",
        "blockHash": "0x99e8663c7b6d8bba3c7627a17d774238eae3e793dee30008debb2699666657de",
        "blockNumber": "0x5d12ab",
        "data": "0x0000000000000000000000000000000000000000000000000000000025c6b720",
        "logIndex": "0x3",
        "removed": false,
        "topics": ["0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef", "0x00000000000000000000000080e73e47173b2d00b531bf83bc39e710157125c3", "0x0000000000000000000000008f6cc93795969e5bbbf07c66dfee7d41ad24f1ef"],
        "transactionHash": "0x9e8f1cb1facb9a11a1cf947634053a0b2d557399f926b12127aa10497a2f0153",
        "transactionIndex": "0x5"
    }
}
eth_newBlockFilter
Creates a filter in the node, to notify when a new block arrives. To check if the state has changed, call eth_getFilterChanges.
Parameters
None
Returns
QUANTITY - A filter id.
​Example​
Request
Curl
Postman
Curl
curl https://eth-mainnet.alchemyapi.io/v2/your-api-key \
-X POST \
-H "Content-Type: application/json" \
-d '{"jsonrpc":"2.0","method":"eth_newBlockFilter","params":[],"id":0}'
Postman
URL: https://eth-mainnet.alchemyapi.io/v2/your-api-key
RequestType: POST
Body: 
{
    "jsonrpc":"2.0",
    "method":"eth_newBlockFilter",
    "params":[],
    "id":73
}
Result
{
  "jsonrpc": "2.0",
  "id": 0,
  "result": "0x9fb7f13924bb605fd29f3ddd6d193ece"
}
eth_newFilter
Creates a filter object, based on filter options, to notify when the state changes (logs). Unlike eth_newBlockFilterwhich notifies you of all new blocks, you can pass in filter options to track new logs matching the topics specified.  
To check if the state has changed, call eth_getFilterChanges.​
A note on specifying topic filters:
Topics are order-dependent. A transaction with a log with topics [A, B] will be matched by the following topic filters:
[] “anything”
[A] “A in first position (and anything after)”
[null, B] “anything in first position AND B in second position (and anything after)”
[A, B] “A in first position AND B in second position (and anything after)”
[[A, B], [A, B]] “(A OR B) in first position AND (A OR B) in second position (and anything after)”
Parameters
Object - The filter options:
fromBlock: QUANTITY|TAG - (optional, default: "latest") Integer block number, or "latest" for the last mined block or "pending", "earliest" for not yet mined transactions.
toBlock: QUANTITY|TAG - (optional, default: "latest") Integer block number, or "latest" for the last mined block or "pending", "earliest" for not yet mined transactions.
address: DATA|Array, 20 Bytes - (optional) Contract address or a list of addresses from which logs should originate.
topics: Array of DATA, - (optional) Array of 32 Bytes DATA topics. Topics are order-dependent. Each topic can also be an array of DATA with “or” options.
params: [{
  "fromBlock": "0x1",
  "toBlock": "0x2",
  "address": "0x8888f1f195afa192cfee860698584c030f4c9db1",
  "topics": ["0x000000000000000000000000a94f5374fce5edbc8e2a8697c15331677e6ebf0b", null, ["0x000000000000000000000000a94f5374fce5edbc8e2a8697c15331677e6ebf0b", "0x0000000000000000000000000aff3454fce5edbc8cca8697c15331677e6ebccc"]]
}]
Returns
QUANTITY - A filter id.
​Example​
Request
Curl
Postman
Curl
curl https://eth-mainnet.alchemyapi.io/v2/your-api-key \
-X POST \
-H "Content-Type: application/json" \
-d '{"jsonrpc":"2.0","method":"eth_newFilter","params":[{"fromBlock": "0x1","toBlock": "0x2","address": "0x8888f1f195afa192cfee860698584c030f4c9db1","topics": ["0x000000000000000000000000a94f5374fce5edbc8e2a8697c15331677e6ebf0b", null, ["0x000000000000000000000000a94f5374fce5edbc8e2a8697c15331677e6ebf0b", "0x0000000000000000000000000aff3454fce5edbc8cca8697c15331677e6ebccc"]]}],"id":0}'
Postman
URL: https://eth-mainnet.alchemyapi.io/v2/your-api-key
RequestType: POST
Body: 
{
    "jsonrpc":"2.0",
    "method":"eth_newFilter",
    "params":[{"fromBlock": "0x1","toBlock": "0x2","address": "0x8888f1f195afa192cfee860698584c030f4c9db1","topics": ["0x000000000000000000000000a94f5374fce5edbc8e2a8697c15331677e6ebf0b", null, ["0x000000000000000000000000a94f5374fce5edbc8e2a8697c15331677e6ebf0b", "0x0000000000000000000000000aff3454fce5edbc8cca8697c15331677e6ebccc"]]}],
    "id":0
}
Result
{
  "jsonrpc": "2.0",
  "id": 0,
  "result": "0xdcc9a819f80efa9e1d215a9d41b2d22e"
}
eth_uninstallFilter
Uninstalls a filter with given id. Should always be called when watch is no longer needed. Additionally, Filters timeout when they aren’t requested with eth_getFilterChangesfor a period of time.
Parameters
QUANTITY - The filter id.
params: [
  "0xfe704947a3cd3ca12541458a4321c869"
]
Returns
Boolean - true if the filter was successfully uninstalled, otherwise false.
​Example​
Request
Curl
Postman
Curl
curl https://eth-mainnet.alchemyapi.io/v2/your-api-key \
-X POST \
-H "Content-Type: application/json" \
-d '{"jsonrpc":"2.0","method":"eth_uninstallFilter","params":["0xfe704947a3cd3ca12541458a4321c869"],"id":0}'
Postman
URL: https://eth-mainnet.alchemyapi.io/v2/your-api-key
RequestType: POST
Body: 
{
    "jsonrpc":"2.0",
    "method":"eth_uninstallFilter",
    "params":["0xfe704947a3cd3ca12541458a4321c869"],
    "id":0
}
Result
{
  "jsonrpc": "2.0",
  "id": 0,
  "result": false
}
​🖥 Web3
web3_clientVersion
Returns the current client version.
Parameters
none
Returns
String - The current client version
​Example​
Request
Curl
Postman
Curl
curl https://arb-mainnet.g.alchemy.com/v2/your-api-key\
-X POST \
-H 
Arbitrum API

Mainnet vs. Testnet

​📦 Retrieving Blocks

eth_blockNumber

Parameters

Returns

​Example​

eth_getBlockByHash

Parameters

Returns

​Example​

eth_getBlockByNumber

Parameters

Returns

​Example​

​🧾 Reading Transactions

eth_getTransactionByHash

Parameters

Returns

​Example​

eth_getTransactionCount

Parameters

Returns

​Example​

eth_getTransactionReceipt

Parameters

Returns

​Example​

eth_getBlockTransactionCountByHash

Parameters

Returns

​Example​

eth_getBlockTransactionCountByNumber

Parameters

Returns

​Example​

eth_getTransactionByBlockHashAndIndex

Parameters

Returns

​Example​

eth_getTransactionByBlockNumberAndIndex

Parameters

Returns

​Example​

​✍ Writing Transactions

eth_sendRawTransaction

Parameters

Returns

​Example​

​📂 Account Information

eth_getBalance

Parameters

Returns

​Example​

eth_getCode

Parameters

Returns

​Example​

eth_getStorageAt

Parameters

Returns

Example

eth_accounts

Parameters

Returns

​Example​

​🧠 EVM/Smart Contract Execution

eth_call

Parameters

Returns

​Example​

​📑 Event Logs

eth_getLogs

Parameters

Returns

​Example​

​⛓ Chain Information

eth_gasPrice

Parameters

Returns

📦 Retrieving Blocks

Example

Example

Example

🧾 Reading Transactions

Example

Example

Example

Example

Example

Example

Example

✍ Writing Transactions

Example

📂 Account Information

Example

Example

Example

🧠 EVM/Smart Contract Execution

Example

📑 Event Logs

Example

⛓ Chain Information

Example

Example

Example

🔦 Filters

Example

Example

Example

Example

Example

🖥 Web3

Example
