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POST
eth_getUncleCountByBlockNumber
curl --request POST \
  --url https://tempo-mainnet.core.chainstack.com/c3ce2925b51f1ed18719fe8a23bbdccf/ \
  --header 'Content-Type: application/json' \
  --data '
{
  "jsonrpc": "2.0",
  "method": "eth_getUncleCountByBlockNumber",
  "params": [
    "latest"
  ],
  "id": 1
}
'
{
  "jsonrpc": "<string>",
  "id": 123,
  "result": "<unknown>"
}
Tempo API method that returns the number of uncles in a block by block number. Tempo uses Simplex Consensus and does not produce uncle blocks, so this always returns 0x0.
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​
Parameters

  • blockParameter — the block number (hex) or tag (latest, earliest, pending)

​
Response

  • result — the number of uncles in the block, encoded as hexadecimal. On Tempo, this always returns 0x0 since Tempo uses Simplex Consensus and has no uncle blocks.

​
eth_getUncleCountByBlockNumber code examples

curl -X POST "CHAINSTACK_NODE_URL" \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc": "2.0", "method": "eth_getUncleCountByBlockNumber", "params": ["latest"], "id": 1}'

Body

application/json
​
jsonrpc
string
default:2.0
​
method
string
default:eth_getUncleCountByBlockNumber
​
params
any[]

Method parameters

​
id
integer
default:1

Response

200 - application/json

Successful response

​
jsonrpc
string
​
id
integer
​
result
any

Method result

Last modified on March 19, 2026