Syscoin public RPC endpoints, tested
Every keyless Syscoin (chain ID 57) endpoint listed on Chainlist and chainid.network, tested the same way on 2026-10-11: 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 7 HTTP endpoints were working.
Working HTTP endpoints
| Endpoint | Latency | Behind best | eth_getLogs | State |
|---|---|---|---|---|
| https://rpc.syscoin.org | 20 ms | 0 blocks | 10,000+ | archive (1M+) |
| https://syscoin-evm.publicnode.com | 26 ms | 0 blocks | 10,000+ | recent only |
| https://rpc.swiftnodes.io/rpc/syscoin (SwiftNodes, keyless: 2 req/s) | 63 ms | 0 blocks | 1,000 | recent only |
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
- subscribed
rpc.syscoin.org/wss: accepted; this chain produced no block during the 15 s window - subscribed
syscoin-evm.publicnode.com: accepted; this chain produced no block during the 15 s window - does not stream
rpc.swiftnodes.io/ws/syscoin(SwiftNodes): subscribe rejected: WebSocket subscriptions require an API key. Get a free key at https://swiftnodes
Listed but not working
syscoin.public-rpc.com: chainId: Unauthorized: You must authenticate your request with an API key. Create an account on httprpc.ankr.com/syscoin: chainId: Unauthorized: You must authenticate your request with an API key. Create an account on httplb.routeme.sh/rpc/evm/57: chainId: rate limited57.rpc.thirdweb.com: eth_blockNumber failed
Test any endpoint yourself with the RPC tester. Our Syscoin endpoint, limits and status: Syscoin RPC, uptime history.