Harmony public RPC endpoints, tested
Every keyless Harmony (chain ID 1666600000) endpoint listed on Chainlist and chainid.network, tested the same way on 2026-09-24: 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. 6 of 13 HTTP endpoints were working.
Working HTTP endpoints
| Endpoint | Latency | Behind best | eth_getLogs | State |
|---|---|---|---|---|
| https://a.api.s0.t.hmny.io | 23 ms | 0 blocks | 1,000 | archive (1M+) |
| https://harmony-0.drpc.org | 26 ms | 0 blocks | under 1,000 | archive (1M+) |
| https://api.s0.t.hmny.io | 52 ms | 0 blocks | 1,000 | archive (1M+) |
| https://api.harmony.one | 54 ms | 0 blocks | 1,000 | archive (1M+) |
| https://one-mainnet-s0.gateway.tatum.io | 123 ms | 0 blocks | under 1,000 | none |
| https://rpc.swiftnodes.io/rpc/harmony (SwiftNodes, keyless: 2 req/s) | 257 ms | 0 blocks | 1,000 | 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
harmony-0.drpc.org: subscribe rejected: method is not available - does not stream
harmony.api.pocket.network: connection failed (connect) - does not stream
rpc.swiftnodes.io/ws/harmony(SwiftNodes): subscribe rejected: method is not available
Listed but not working
rpc.ankr.com/harmony: chainId: Unauthorized: You must authenticate your request with an API key. Create an account on httppublic.1rpc.io/one: chainId: You've reached the usage limit for your current plan. To continue with higher limits and unendpoints.omniatech.io/v1/harmony/mainnet-0/public: no answer (HTTP 521)rpc.owlracle.info/one/70d38ce1826c4a60bb2a8e05a6c8b20f: no answer (HTTP 503)harmony.api.pocket.network: chainId: Service 'harmony' is not configured1rpc.io/one: chainId: You've reached the usage limit for your current plan. To continue with higher limits and unlb.routeme.sh/rpc/evm/1666600000: chainId: rate limited
Test any endpoint yourself with the RPC tester. Our Harmony endpoint, limits and status: Harmony RPC, uptime history.