{"slug":"union-rpc","title":"Fastest free Union RPC, live no-key endpoint latency","subtitle":"HTTP round-trip latency for Tendermint /status queries against every available public Union (union-1) endpoint, audited every 60 seconds from 3 regions.","category":"RPCs","metric":"RPC latency","unit":"ms","status":"live","higherIsBetter":false,"filters":null,"value":217.53,"leader":{"name":"Nodes.Guru","slug":"nodes-guru","value":217.53},"rankings":[{"name":"Nodes.Guru","slug":"nodes-guru","ms":{"p50":217.53,"p90":240.73,"p99":726.11,"mean":233.982},"successRate":100,"sampleSize":650.778},{"name":"Stake And Relax","slug":"stakeandrelax","ms":{"p50":242.27,"p90":273.723,"p99":806.648,"mean":260.344},"successRate":100,"sampleSize":653.78},{"name":"High Stakes","slug":"highstakes","ms":{"p50":330.539,"p90":390.48,"p99":1307.59,"mean":391.198},"successRate":100,"sampleSize":647.777}],"sparkline":[300.818,273.205,259.299,241.14,241.35,236.698,228.223,218.502,218.311,217.605,217.774],"sampleSize":1952.335,"asOf":"2026-08-29T19:43:30.747Z","headline":"Nodes.Guru posts the lowest rpc latency at 218 ms (p50, 24h) on Fastest free Union RPC, live no-key endpoint latency.","quote":"Nodes.Guru posts the lowest rpc latency at 218 ms (p50, 24h) on Fastest free Union RPC, live no-key endpoint latency. Source: OpenChainBench (https://openchainbench.com/benchmarks/union-rpc).","cite":{"plain":"OpenChainBench. \"Fastest free Union RPC, live no-key endpoint latency\". Retrieved 2026-08-29. https://openchainbench.com/benchmarks/union-rpc","bibtex":"@misc{ocb_union_rpc,\n  author = {OpenChainBench},\n  title  = {Fastest free Union RPC, live no-key endpoint latency},\n  year   = {2026},\n  url    = {https://openchainbench.com/benchmarks/union-rpc},\n  note   = {Retrieved 2026-08-29}\n}","apa":"OpenChainBench. (2026). Fastest free Union RPC, live no-key endpoint latency. Retrieved August 29, 2026, from https://openchainbench.com/benchmarks/union-rpc","ris":"TY  - GEN\r\nAU  - OpenChainBench\r\nTI  - Fastest free Union RPC, live no-key endpoint latency\r\nPY  - 2026\r\nUR  - https://openchainbench.com/benchmarks/union-rpc\r\nY2  - 2026-08-29\r\nER  - \r\n"},"pageUrl":"https://openchainbench.com/benchmarks/union-rpc","ogImage":"https://openchainbench.com/api/og/union-rpc","source":"https://github.com/ChainBench/OpenChainBench/tree/main/harnesses/rpc-capabilities","methodology":["Cadence: every 60 seconds per provider, from each of 3 probe regions (us-east Virginia, eu-west Amsterdam, sgp Singapore). Headline p50/p90/p99 aggregate across all 3 regions via Prometheus avg(quantile_over_time(...)); per-region breakdowns are first-class on this page via the region tabs.","Payload: GET /status. The result.sync_info.latest_block_height field (string-encoded integer) is extracted as the current block height.","Latency: client-side round-trip delta in milliseconds, exposed as both a gauge and a histogram (buckets 50 ms to 10 s), so percentiles are computed via Prometheus quantile_over_time over the last 24 hours.","Call-result classification: ok (parsable block height returned), http_err, jsonrpc_err, stale (block more than 20 behind the cross-provider tip), timeout.","This page is part of the per-chain RPC cluster derived from the cross-chain rpc-capabilities benchmark; the identical harness, cadence and exclusion rules apply on every chain.","Chain scope: every query on this page is pinned to chain=union. Provider coverage at launch: 3 endpoints (Nodes.Guru, Stake And Relax, High Stakes)."],"license":"CC-BY-4.0"}