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POST
Run `getFirstAvailableBlock`
curl --request POST \
  --url 'https://rpc-mainnet.solanatracker.io/?api_key=' \
  --header 'Content-Type: application/json' \
  --data '
{
  "jsonrpc": "2.0",
  "id": "db16f277-1a22-41ff-9f85-f37e2cd77900",
  "method": "getFirstAvailableBlock"
}
'
{
  "jsonrpc": "2.0",
  "id": "db16f277-1a22-41ff-9f85-f37e2cd77900",
  "result": 250000
}

Documentation Index

Fetch the complete documentation index at: https://docs.solanatracker.io/llms.txt

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

Authorizations

​
api_key
string
query
required

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:getFirstAvailableBlock
required

The name of the RPC method to invoke.

Available options:
getFirstAvailableBlock
Example:

"getFirstAvailableBlock"

Response

200 - application/json

Successfully retrieved the slot of the lowest confirmed block.

​
jsonrpc
enum<string>

The JSON-RPC protocol version.

Available options:
2.0
Example:

"2.0"

​
id
string

Identifier matching the request.

Example:

"1"

​
result
integer

Earliest Solana block slot number still available in this node's storage history, indicating the lower boundary of accessible blockchain data.

Example:

250000