{"slug":"arc-rpc","title":"Arc RPC endpoints: free public URLs and private API-key providers by latency","subtitle":"HTTP round-trip latency for eth_getBlockByNumber against every free, no-key public Arc RPC endpoint (probed every 60 seconds from 3 regions) and, under the Access selector (Private), against the API-key endpoints of Alchemy, Chainstack, GetBlock and QuickNode (every 120 seconds from us-east and eu-west). The two cohorts are ranked separately, never against each other.","category":"RPCs","metric":"RPC latency","unit":"ms","status":"live","higherIsBetter":false,"filters":null,"cohorts":[{"tier":"public","label":"Public, no key","headline":true,"url":"https://openchainbench.com/benchmarks/arc-rpc","api":"https://openchainbench.com/api/stat/arc-rpc","sentence":"dRPC has the lowest median latency of the 6 free public Arc RPC endpoints measured, 35 ms (p50, 24h, 3 regions).","leader":{"name":"dRPC","slug":"drpc","value":35.031},"measured":6,"rankings":[{"name":"dRPC","slug":"drpc","p50":35.031,"p99":201.74,"successRate":98.4256},{"name":"Arc","slug":"arc-official","p50":47.2661,"p99":188.51,"successRate":100},{"name":"QuickNode (Arc endpoint)","slug":"arc-quicknode","p50":51.0985,"p99":181.832,"successRate":100},{"name":"PublicNode","slug":"publicnode","p50":72.1044,"p99":322.215,"successRate":99.9305},{"name":"Blockdaemon","slug":"blockdaemon","p50":83.0147,"p99":260.85,"successRate":100},{"name":"Tenderly Gateway","slug":"tenderly","p50":103.382,"p99":118.976,"successRate":99.4441}]},{"tier":"keyed","label":"Private, API key","headline":false,"url":"https://openchainbench.com/benchmarks/arc-rpc#tier=keyed","api":"https://openchainbench.com/api/stat/arc-rpc?tier=keyed","sentence":"GetBlock has the lowest median latency of the 4 private (API-key) Arc RPC endpoints measured, 14 ms (p50, 24h, 3 regions).","leader":{"name":"GetBlock","slug":"getblock","value":14.4121},"measured":4,"rankings":[{"name":"GetBlock","slug":"getblock","p50":14.4121,"p99":40.6449,"successRate":100},{"name":"QuickNode","slug":"quicknode","p50":33.2262,"p99":45.2276,"successRate":100},{"name":"Alchemy","slug":"alchemy","p50":39.383,"p99":89.0821,"successRate":100},{"name":"Chainstack","slug":"chainstack","p50":45.0455,"p99":153.671,"successRate":100}]}],"value":35.031,"leader":{"name":"dRPC","slug":"drpc","value":35.031},"leaders":[{"name":"dRPC","slug":"drpc","value":35.031}],"rankings":[{"name":"dRPC","slug":"drpc","ms":{"p50":35.031,"p90":125.394,"p99":201.74,"mean":64.7297},"successRate":98.4256,"sampleSize":4319.72},{"name":"Arc","slug":"arc-official","ms":{"p50":47.2661,"p90":78.4706,"p99":188.51,"mean":55.7347},"successRate":100,"sampleSize":4319.72},{"name":"QuickNode (Arc endpoint)","slug":"arc-quicknode","ms":{"p50":51.0985,"p90":70.4637,"p99":181.832,"mean":58.9393},"successRate":100,"sampleSize":4318.72},{"name":"PublicNode","slug":"publicnode","ms":{"p50":72.1044,"p90":133.259,"p99":322.215,"mean":90.642},"successRate":99.9305,"sampleSize":4319.72},{"name":"Blockdaemon","slug":"blockdaemon","ms":{"p50":83.0147,"p90":85.2271,"p99":260.85,"mean":85.7783},"successRate":100,"sampleSize":4320.72},{"name":"Tenderly Gateway","slug":"tenderly","ms":{"p50":103.382,"p90":109.465,"p99":118.976,"mean":104.284},"successRate":99.4441,"sampleSize":4318.73}],"sparkline":[69.2717,73.804,72.3751,68.6643,67.2313,67.4762,69.9422,68.6251,65.1562,63.9066,58.4628,59.2965,56.4723,61.1416,64.2487,69.066,69.6603,68.6021,68.2109,66.1737,71.9787,72.3652,72.551,65.1405,62.4912,61.7813,64.929,63.3059,69.617,66.7875,73.3914,64.433,65.8117,65.4179,71.0541,73.7913,75.1587,73.6676,71.6959,71.3586,69.5978,69.5805,64.5123,61.6705,55.7117,56.7884,63.4237,72.3481,74.664,73.8504,65.63,59.9938,58.7913,62.8535,67.1377,69.0267,69.9427,70.1929,74.5511,70.1984,71.066,69.5075,65.4288,58.4442,47.4698,53.074,57.4968,63.6999,57.9214,48.8532,39.1268,35.5987,36.4745],"sampleSize":25917.33,"asOf":"2026-09-30T14:46:12.283Z","freshness":{"asOf":"2026-09-30T14:46:12.283Z","ageHours":0.1,"stale":false},"measured":6,"ranked":6,"headline":"dRPC has the lowest median latency of the 6 free public Arc RPC endpoints measured, 35 ms (p50, 24h, 3 regions).","quote":"dRPC has the lowest median latency of the 6 free public Arc RPC endpoints measured, 35 ms (p50, 24h, 3 regions). Source: OpenChainBench (https://openchainbench.com/benchmarks/arc-rpc).","cite":{"plain":"OpenChainBench. \"Arc RPC endpoints: free public URLs and private API-key providers by latency\". Retrieved 2026-09-30. https://openchainbench.com/benchmarks/arc-rpc","bibtex":"@misc{ocb_arc_rpc,\n  author = {OpenChainBench},\n  title  = {Arc RPC endpoints: free public URLs and private API-key providers by latency},\n  year   = {2026},\n  url    = {https://openchainbench.com/benchmarks/arc-rpc},\n  note   = {Retrieved 2026-09-30}\n}","apa":"OpenChainBench. (2026). Arc RPC endpoints: free public URLs and private API-key providers by latency. Retrieved September 30, 2026, from https://openchainbench.com/benchmarks/arc-rpc","ris":"TY  - GEN\r\nAU  - OpenChainBench\r\nTI  - Arc RPC endpoints: free public URLs and private API-key providers by latency\r\nPY  - 2026\r\nUR  - https://openchainbench.com/benchmarks/arc-rpc\r\nY2  - 2026-09-30\r\nER  - \r\n"},"pageUrl":"https://openchainbench.com/benchmarks/arc-rpc","ogImage":"https://openchainbench.com/api/og/arc-rpc","source":"https://github.com/ChainBench/OpenChainBench/tree/main/harnesses/rpc-capabilities","methodology":["Cadence: the public cohort every 60 seconds per provider from each of 3 probe regions (us-east Virginia, eu-west Amsterdam, sgp Singapore), its headline p50/p90/p99 aggregating all 3 via Prometheus `avg(quantile_over_time(...))`. The keyed cohort runs every 120 seconds from us-east and eu-west and aggregates those two. Per-region breakdowns are first-class 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 latest-header fetch with a rotating id defeats edge caches that answer eth_blockNumber without touching a node.","Latency measurement, call-result classification (`ok`, `http_err`, `jsonrpc_err`, `stale`, `timeout`) and the archive-depth audit follow the cluster method documented on [rpc-capabilities](https://openchainbench.com/benchmarks/rpc-capabilities#methodology); this page is the Arc-scoped view of the same harness, with the same exclusion rules.","Chain scope: every query on this page is pinned to chain=\"arc\" (chain id 5042). Provider coverage: 6 no-key public-read endpoints live today, each listed with its URL in the endpoints table on this page. Exclusions follow the cluster-wide rules documented on the parent benchmark.","Endpoints published by the chain: the RPC endpoints page of the Arc docs lists Circle's primary endpoint plus Alchemy, Blockdaemon, dRPC and QuickNode. The Blockdaemon and QuickNode rows are Arc-branded URLs (rpc.blockdaemon.mainnet.arc.io, rpc.quicknode.mainnet.arc.io) that answer without a key, verified before inclusion, and are measured here as such.","The dRPC row of that table (rpc.drpc.mainnet.arc.io) serves the same free tier as arc.drpc.org, identical x-drpc-owner-id, and is measured once under dRPC; the Alchemy row needs a key and sits in the private cohort.","Private cohort (Access selector, Private): Alchemy, Chainstack, GetBlock and QuickNode probed on their keyed Arc endpoints every 120 seconds from us-east and eu-west, same call (eth_getBlockByNumber, rotating id), same ok / http_err / jsonrpc_err / stale / timeout classification.","Keys live in the probe environment, never in the repo. Plan tiers, disclosed: Chainstack: a Global Node on the Growth plan, sponsored by Chainstack; QuickNode: an endpoint on the Mobula enterprise-tier account, shared fleet; Alchemy: a Free plan key (30M CU per month, 25 requests per second) normal signup, the tier any reader gets; Alchemy states free and paid keys share one routing; GetBlock: a Starter plan, 50M compute units per month shared by the two probe regions, 20 CU per call.","GetBlock regional pairing: us-east uses GetBlock's New York endpoint and eu-west its Frankfurt endpoint. Alchemy, Chainstack and QuickNode publish one routed entry point per chain instead, which in the general case does land a probe on a nearby node. Some of any gap between the two arrangements is deployment topology rather than node speed, and a deployment in one of these regions would see the same benefit GetBlock's endpoint gives the probe.","GetBlock coverage: GetBlock does not offer Arc in Singapore, so no GetBlock row exists for that region: the endpoint is not offered there, which is not a failed or pending measurement. The whole keyed cohort is therefore measured from us-east and eu-west, because averaging a two-region row against three-region rows would compare different populations.","Two cohorts, two rankings: the public endpoints are shared, rate-limited gateways probed every 60 seconds; the keyed endpoints are metered or dedicated and probed every 120 seconds. The selector switches the whole page (ranking, chart, region tabs, badges, citation) between them. No figure on this page compares a public endpoint with a keyed one.","Arc produces blocks in well under a second (Malachite BFT, sub-second finality). The stale check tolerates 40 blocks behind the cross-provider tip (20 s of wall clock) on the public cohort and 20 blocks on the keyed one."],"license":"CC-BY-4.0"}