eth_createAccessList on BOB
Simulates a transaction and returns the access list (addresses and storage keys it touches), which can lower gas costs on EIP-2930 transactions.
Pre-computing the access list discounts first-touch storage/address costs — worth it for gas-sensitive, storage-heavy txs. The response also returns a gasUsed figure you can cross-check against eth_estimateGas.
BOB endpoint (public — no key)
https://rpc.nodeflare.app/bob/publicMethod
eth_createAccessList
Cost
5 CU
Chain ID
60808
Block time
~2 s
Finality
~2 s soft · L1-final ~13 min
Contract calls on BOB
Standard OP-Stack semantics; all EVM tooling works. Bitcoin-related precompiles/light-client contracts are regular contracts from the RPC's perspective.
Parameters
[callObject, blockNumber|tag]cURL
curl https://rpc.nodeflare.app/bob/public \
-X POST \
-H 'content-type: application/json' \
-d '{"jsonrpc":"2.0","method":"eth_createAccessList","params":[{"to": "0x0000000000000000000000000000000000000000", "data": "0x"}, "latest"],"id":1}'ethers.js
import { ethers } from 'ethers';
const provider = new ethers.JsonRpcProvider(
'https://rpc.nodeflare.app/bob/public'
);
const result = await provider.send('eth_createAccessList', [{"to": "0x0000000000000000000000000000000000000000", "data": "0x"}, "latest"]);Try it live
Runs the example above against the public BOB endpoint — straight from your browser.
eth_createAccessList on BOB — FAQ
How do I call eth_createAccessList on BOB?
POST a JSON-RPC 2.0 request with "method": "eth_createAccessList" to NodeFlare's BOB endpoint at https://rpc.nodeflare.app/bob/public. No API key is required for the public endpoint.
What does eth_createAccessList cost on the free tier?
eth_createAccessList is weighted at 5 compute units per call. The free tier includes 2,000,000 CU/month, so that is roughly 400,000 eth_createAccessList calls per month — no credit card.
Is eth_createAccessList available on the public BOB endpoint?
Yes. eth_createAccessList works on the public BOB endpoint (https://rpc.nodeflare.app/bob/public) with no API key, rate-limited per IP. A free key adds higher limits and a dedicated path.
Anything BOB-specific to know when using eth_createAccessList?
Standard OP-Stack semantics; all EVM tooling works. Bitcoin-related precompiles/light-client contracts are regular contracts from the RPC's perspective.
Call eth_createAccessList on BOB with a free key
2,000,000 compute units/month, heavy methods unlocked, every chain included. No credit card.
Get your free API key →eth_createAccessList on other chains