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POST
getBlocks
curl --request POST \
  --url 'https://mainnet.helius-rpc.com/?api-key=' \
  --header 'Content-Type: application/json' \
  --data '
{
  "jsonrpc": "2.0",
  "id": "1",
  "method": "getBlocks",
  "params": [
    5,
    10,
    {
      "commitment": "finalized"
    }
  ]
}
'
{
  "jsonrpc": "2.0",
  "id": "1",
  "result": [
    5,
    6,
    7,
    8,
    9,
    10
  ]
}

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
Start slot (required).
​
slot
number
required
End slot (optional, must be ≤ 500,000 blocks from start slot).
​
commitment
string
default:"finalized"
The commitment level for the request.
  • confirmed
  • finalized

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
Example:

"2.0"

​
id
string
default:1
required

A unique identifier for the request.

Example:

"1"

​
method
enum<string>
default:getBlocks
required

The name of the RPC method to invoke.

Available options:
getBlocks
Example:

"getBlocks"

​
params
integer · integer · object[]
required

Request parameters for the method.

Start slot (required).

Example:

5

Response

Successfully retrieved confirmed blocks.

​
jsonrpc
enum<string>
Available options:
2.0
Example:

"2.0"

​
id
string

Identifier matching the request.

Example:

"1"

​
result
integer[]

List of confirmed blocks between start_slot and end_slot.

Example:
[5, 6, 7, 8, 9, 10]