Cronos zkEVM public RPC endpoints, tested
Every keyless Cronos zkEVM (chain ID 388) endpoint listed on Chainlist and chainid.network, tested the same way on 2026-10-04: does it answer on the right chain, how fast, how far behind the best head, how large an eth_getLogs range it accepts, whether it keeps archive state, and whether its WebSocket actually streams. 3 of 5 HTTP endpoints were working.
Working HTTP endpoints
| Endpoint | Latency | Behind best | eth_getLogs | State |
|---|---|---|---|---|
| https://cronos-zkevm.drpc.org | 19 ms | 0 blocks | under 1,000 | archive (1M+) |
| https://mainnet.zkevm.cronos.org | 135 ms | 0 blocks | 10,000+ | archive (1M+) |
| https://rpc.swiftnodes.io/rpc/cronos-zkevm (SwiftNodes, keyless: 2 req/s) | 182 ms | 0 blocks | 10,000+ | archive (1M+) |
Order: endpoints within 3 blocks of the best head first, then by median latency. Latency is measured from one server, so yours will differ by region; lag and limits do not.
WebSocket endpoints
- does not stream
cronos-zkevm.drpc.org: subscribe rejected: method is not available on free plan, please upgrade to paid plan - does not stream
rpc.swiftnodes.io/ws/cronos-zkevm(SwiftNodes): gateway: WebSocket not available for chain: cronos-zkevm
Listed but not working
cronos-zkevm.rpc.sentio.xyz: no answer (HTTP 404)lb.routeme.sh/rpc/evm/388: chainId: rate limited
Test any endpoint yourself with the RPC tester. Our Cronos zkEVM endpoint, limits and status: Cronos zkEVM RPC, uptime history.