{"slug":"immutable-rpc","title":"Fastest free Immutable zkEVM RPC, live no-key EVM endpoint latency","subtitle":"HTTP round-trip latency for the `eth_getBlockByNumber(\\\"latest\\\", false)` method against every free, no-key public Immutable zkEVM EVM endpoint, audited every 60 seconds from 3 regions.","category":"RPCs","metric":"RPC latency","unit":"ms","status":"live","higherIsBetter":false,"filters":null,"value":227.555,"leader":{"name":"Immutable","slug":"immutable-official","value":227.555},"rankings":[{"name":"Immutable","slug":"immutable-official","ms":{"p50":227.555,"p90":234.867,"p99":263.052,"mean":227.879},"successRate":100,"sampleSize":4324.84},{"name":"Tenderly Gateway","slug":"tenderly","ms":{"p50":325.992,"p90":337.087,"p99":350.288,"mean":325.84},"successRate":100,"sampleSize":4300.83},{"name":"dRPC","slug":"drpc","ms":{"p50":346.926,"p90":395.217,"p99":936.335,"mean":333.718},"successRate":95.6019,"sampleSize":4320.84}],"sparkline":[226.366,226.078,225.662,226.64,226.239,225.844,224.609,225.278,225.248,225.69,224.608,225.305,225.703,227.292,227.289,227.265,227.327,227.302,227.297,227.275,227.193,227.152,227.528,230.709,235.331,235.529,233.133,227.79,227.173,225.452,225.896,223.802,222.975,222.027,222.513,223.461,225.464,226.06,227.178,226.869,226.907,226.911,227.541,227.882,226.996,225.977,226.275,228.295,229.446,229.925,229.458,228.822,228.656,227.374,226.873,227.082,227.678,227.921,227.483,227.593,228.622,228.59,228.864,228.891,230.317,231.742,233.399,233.134,233.31,232.972,232.642,232.076,230.897],"sampleSize":17263.34,"asOf":"2026-09-10T13:33:30.776Z","headline":"Immutable posts the lowest rpc latency at 228 ms (p50, 24h) on Fastest free Immutable zkEVM RPC, live no-key EVM endpoint latency.","quote":"Immutable posts the lowest rpc latency at 228 ms (p50, 24h) on Fastest free Immutable zkEVM RPC, live no-key EVM endpoint latency. Source: OpenChainBench (https://openchainbench.com/benchmarks/immutable-rpc).","cite":{"plain":"OpenChainBench. \"Fastest free Immutable zkEVM RPC, live no-key EVM endpoint latency\". Retrieved 2026-09-10. https://openchainbench.com/benchmarks/immutable-rpc","bibtex":"@misc{ocb_immutable_rpc,\n  author = {OpenChainBench},\n  title  = {Fastest free Immutable zkEVM RPC, live no-key EVM endpoint latency},\n  year   = {2026},\n  url    = {https://openchainbench.com/benchmarks/immutable-rpc},\n  note   = {Retrieved 2026-09-10}\n}","apa":"OpenChainBench. (2026). Fastest free Immutable zkEVM RPC, live no-key EVM endpoint latency. Retrieved September 10, 2026, from https://openchainbench.com/benchmarks/immutable-rpc","ris":"TY  - GEN\r\nAU  - OpenChainBench\r\nTI  - Fastest free Immutable zkEVM RPC, live no-key EVM endpoint latency\r\nPY  - 2026\r\nUR  - https://openchainbench.com/benchmarks/immutable-rpc\r\nY2  - 2026-09-10\r\nER  - \r\n"},"pageUrl":"https://openchainbench.com/benchmarks/immutable-rpc","ogImage":"https://openchainbench.com/api/og/immutable-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. Non-cacheable by design: the rotating id defeats edge caches that would answer a bare head query without touching a node.","Latency: client-side round-trip delta in milliseconds, exposed as both a gauge and a histogram (buckets 50 ms → 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 with a parsable hex block number), `http_err`, `jsonrpc_err` (HTTP 200 carrying an error body), `stale` (more than 25 blocks behind the cross-provider tip), `timeout`. Latency without reliability is a misleading ranking signal.","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=\"immutable\"`. Provider coverage at launch: 4 no-key endpoints."],"license":"CC-BY-4.0"}