Gram RPC endpoints: free public URLs by latency
HTTP round-trip latency for getMasterchainInfo against every available public Gram (TON) node, audited every 60 seconds from 3 regions.
TL;DR. As of , Tatum has the lowest median latency of the 4 free public Gram RPC endpoints measured, 46 ms (p50, 24h, 3 regions). Source: OpenChainBench, https://openchainbench.com/benchmarks/gram-rpc. 4 public endpoints, no key: ton-mainnet.gateway.tatum.io, toncenter.com, ton.api.onfinality.io, api.uniblock.dev. Full URLs with their 24h median are listed below.
Companion page
Comparing free RPC endpoints across every chain we measure? Open the cross-chain RPC matrix →
Gram (formerly TON/Toncoin) is a high-throughput L1 blockchain using the BAG (Byzantine Agreement for Gram) consensus protocol and a multi-workchain architecture anchored by a masterchain. The masterchain seqno advances roughly every 5 seconds with deterministic finality. Public JSON-RPC endpoints are available from TON Center, OnFinality, Tatum and Uniblock. Every provider was live-verified with consecutive getMasterchainInfo probes at launch.
Methodology
Gram: 4 free public RPC endpoints answering `getMasterchainInfo` every 60 seconds from us-east, eu-west and Singapore, ranked by 24h median. Tatum leads at 46 ms. We measure the round-trip latency of a single JSON-RPC call (getMasterchainInfo) against every available public Gram node that sustains continuous probing: 4 providers live today, every 60 seconds, from us-east, eu-west and Singapore. The harness classifies every response (ok / http_err / jsonrpc_err / stale / timeout) with a Gram-scaled staleness gap (60 seqnos, around 5 min). The cross-chain view lives on the parent rpc-capabilities benchmark; this page is the Gram-scoped answer with per-region breakdowns as a first-class dimension.
Results: 4 free public Gram RPC endpoints ranked by p50 latency (24h, 3 regions)
| № | Providers | p50 | p90 | p99 | Success |
|---|---|---|---|---|---|
| 1 | Tatum | 46 ms | 54 ms | 124 ms | 74.99% |
| 2 | TON Center | 106 ms | 293 ms | 312 ms | 99.98% |
| 3 | OnFinality | 179 ms | 228 ms | 1.19 s | 99.74% |
| 4 | Uniblock | 425 ms | 724 ms | 2.44 s | 56.10% |
Public Gram RPC endpoints measured
The 4 no-key endpoints answering our probes today, with their current 24h median. Paste one into a wallet or a client as is: no signup, no key. Private providers (API key) are never listed with a URL.
Tatumhttps://ton-mainnet.gateway.tatum.io/jsonRPC46 ms75.0%
TON Centerhttps://toncenter.com/api/v2/jsonRPC106 ms100.0%
OnFinalityhttps://ton.api.onfinality.io/public/jsonRPC179 ms99.7%
Uniblockhttps://api.uniblock.dev/uni/v1/json-rpc?chainId=toncoin425 ms56.1%
Median round-trip and success rate over the last 24 hours across the probe regions; the ranked table above carries p90, p99 and the per-region split.
Source code github.com/ChainBench/OpenChainBench/tree/main/harnesses/rpc-capabilities