Docs · method · EVM

`eth_blockNumber`

Facts for eth_blockNumber
Units per call	1 (standard)
Cache	micro — 2 s, a hit costs 0 units
Rule	1 unit; identical head polls within 2 seconds are served from our cache at 0 units (rate window still counts).
Chains	Ethereum Mainnet · Base Mainnet · Arbitrum One · OP Mainnet · Polygon PoS
Specification	https://ethereum.github.io/execution-apis/api-documentation/

Example

curl -s https://flexyield.io/rpc/eth_mainnet \
  -H "Authorization: Bearer $FLEXYIELD_KEY" -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","id":1,"method":"eth_blockNumber","params":[]}'

Questions

Is eth_blockNumber cached?

Yes, for 2 seconds — a hit costs 0 units.

All methods: methods and limits · docs · AI agents: the same call is the rpc_call MCP tool.