{"slug":"zircuit-rpc","title":"Fastest free Zircuit RPC, live no-key endpoint latency","subtitle":"HTTP round-trip latency for eth_getBlockByNumber against every free, no-key public Zircuit RPC endpoint, audited every 60 seconds from 3 regions.","category":"RPCs","metric":"RPC latency","unit":"ms","status":"live","higherIsBetter":false,"filters":null,"value":137.384,"leader":{"name":"Zircuit Foundation","slug":"zircuit-official","value":137.384},"rankings":[{"name":"Zircuit Foundation","slug":"zircuit-official","ms":{"p50":137.384,"p90":144.473,"p99":161.651,"mean":138.178},"successRate":100,"sampleSize":4315.84}],"sparkline":[140.324,140.864,141.746,142.697,142.342,141.786,140.683,140.982,141.407,141.635,142.118,141.882,142.153,141.838,142.071,141.669,141.328,140.699,140.904,141.245,141.485,141.342,141.381,141.36,141.921,141.835,142.319,142.251,143.229,143.56,143.628,147.343,145.976,146.251,140.328,140.209,139.044,139.335,139.397,138.766,137.127,135.513,134.746,134.898,135.058,135.727,135.892,135.912,135.229,135.129,135.096,134.903,134.546,134.341,134.531,134.501,134.377,133.941,133.458,133.185,133.073,133.186,133.027,133.053,133.146,133.322,133.216,132.908,132.701,132.612,132.682,132.812,132.963],"sampleSize":4315.84,"asOf":"2026-09-19T03:35:30.976Z","headline":"Zircuit Foundation posts the lowest rpc latency at 137 ms (p50, 24h) on Fastest free Zircuit RPC, live no-key endpoint latency.","quote":"Zircuit Foundation posts the lowest rpc latency at 137 ms (p50, 24h) on Fastest free Zircuit RPC, live no-key endpoint latency. Source: OpenChainBench (https://openchainbench.com/benchmarks/zircuit-rpc).","cite":{"plain":"OpenChainBench. \"Fastest free Zircuit RPC, live no-key endpoint latency\". Retrieved 2026-09-19. https://openchainbench.com/benchmarks/zircuit-rpc","bibtex":"@misc{ocb_zircuit_rpc,\n  author = {OpenChainBench},\n  title  = {Fastest free Zircuit RPC, live no-key endpoint latency},\n  year   = {2026},\n  url    = {https://openchainbench.com/benchmarks/zircuit-rpc},\n  note   = {Retrieved 2026-09-19}\n}","apa":"OpenChainBench. (2026). Fastest free Zircuit RPC, live no-key endpoint latency. Retrieved September 19, 2026, from https://openchainbench.com/benchmarks/zircuit-rpc","ris":"TY  - GEN\r\nAU  - OpenChainBench\r\nTI  - Fastest free Zircuit RPC, live no-key endpoint latency\r\nPY  - 2026\r\nUR  - https://openchainbench.com/benchmarks/zircuit-rpc\r\nY2  - 2026-09-19\r\nER  - \r\n"},"pageUrl":"https://openchainbench.com/benchmarks/zircuit-rpc","ogImage":"https://openchainbench.com/api/og/zircuit-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: `{\"jsonrpc\":\"2.0\",\"id\":<rotating>,\"method\":\"eth_getBlockByNumber\",\"params\":[\"latest\",false]}`. Plain HTTP POST, identical for every endpoint, no API key in any request.","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` (HTTP 200 + non-empty result), `http_err`, `jsonrpc_err` (HTTP 200 carrying an error body), `stale` (more than 20 blocks behind the cross-provider tip), `timeout`.","This page is part of the per-chain RPC cluster derived from the cross-chain [rpc-capabilities](https://openchainbench.com/benchmarks/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=\"zircuit\"`. Provider coverage: 1 no-key endpoint (Zircuit Foundation)."],"license":"CC-BY-4.0"}