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POST
getBlock
curl --request POST \
  --url 'https://mainnet.helius-rpc.com/?api-key=' \
  --header 'Content-Type: application/json' \
  --data '
{
  "jsonrpc": "2.0",
  "id": "1",
  "method": "getBlock",
  "params": [
    430
  ]
}
'
{
  "id": "<string>",
  "result": {
    "blockhash": "DUCT8VSgk2BXkMhQfxKVYfikEZCQf4dZ4ioPdGdaVxMN",
    "previousBlockhash": "HA2fJgGqmQezCXJRVNZAWPbRMXCPjUyo7VjRF47JGdYs",
    "parentSlot": 429,
    "transactions": [
      {
        "meta": {},
        "transaction": {
          "message": {
            "accountKeys": [
              "<string>"
            ],
            "header": {
              "numReadonlySignedAccounts": 123,
              "numReadonlyUnsignedAccounts": 123,
              "numRequiredSignatures": 123
            },
            "instructions": [
              {
                "accounts": [
                  123
                ],
                "data": "<string>",
                "programIdIndex": 123,
                "stackHeight": 123
              }
            ],
            "recentBlockhash": "<string>"
          },
          "signatures": [
            "<string>"
          ]
        }
      }
    ],
    "blockTime": null,
    "blockHeight": null,
    "rewards": [
      {
        "pubkey": "<string>",
        "lamports": 123,
        "rewardType": "<string>"
      }
    ]
  }
}

Documentation Index

Fetch the complete documentation index at: https://www.helius.dev/docs/llms.txt

Use this file to discover all available pages before exploring further.

​
Request Parameters

​
slot
number
required
Slot number as a u64 integer.
​
commitment
string
default:"finalized"
The commitment level for the request.
  • finalized
​
encoding
string
default:"json"
The encoding format for each returned transaction.
  • json
  • jsonParsed
  • base58
  • base64
​
transactionDetails
string
default:"full"
Level of transaction detail to return. If accounts are requested, transaction details only include signatures and an annotated list of accounts in each transaction. Transaction metadata includes only: fee, err, pre_balances, post_balances, pre_token_balances, and post_token_balances.
  • full
  • accounts
  • signatures
  • none
​
maxSupportedTransactionVersion
number
Maximum transaction version to return in responses. If the requested block contains a transaction with a higher version, an error will be returned. If omitted, only legacy transactions will be returned.
​
rewards
boolean
default:"true"
Whether to populate the rewards array.

Authorizations

​
api-key
string
query
required

Your Helius API key. You can get one for free in the dashboard.

Body

application/json
​
jsonrpc
enum<string>
default:2.0
required

The JSON-RPC protocol version.

Available options:
2.0
​
id
string
default:1
required

A unique identifier for the request.

Example:

"1"

​
method
enum<string>
default:getBlock
required

The name of the RPC method to invoke.

Available options:
getBlock
​
params
(integer | object)[]
required

Parameters for the request.

Slot number as a u64 integer.

Example:

430

Response

Successfully retrieved block details.

​
jsonrpc
enum<string>
Available options:
2.0
​
id
string
​
result
object