Sepolia RPC URL & Chain ID
33 public endpoints · 17 online at the last check
Sepolia is the main public testnet for Ethereum application developers. Test ETH has no value; get it from a faucet.
Last checked 3 min ago
No project pays to be listed. How we test
On this page
Below are the public Sepolia RPC endpoints listed on chainlist.org, re-checked every 5 minutes from our probe server and sorted by current latency. Failed endpoints are collapsed at the bottom.
Public RPCs are free and shared: expect rate limits, no SLA and weaker privacy. For production apps use a dedicated endpoint.
Sepolia network details
- Network name
- Chain ID
- Currency symbol
- Fastest RPC now
- Block explorer
- Latest block
- 12,106,904
- Type
- L1 testnet
Public Sepolia RPC endpoints
| Endpoint | Latency | Block | Uptime 24h | Privacy |
|---|---|---|---|---|
| 38 ms | 12,106,903 | 100% | No tracking | |
| 45 ms | 12,106,904 | 99.7% | Not stated | |
| 51 ms | 12,106,904 | 100% | Not stated | |
| 56 ms | 12,106,904 | 100% | No tracking | |
| 59 ms | 12,106,904 | 100% | Tracks | |
| 65 ms | 12,106,903 | 100% | No tracking | |
| 81 ms | 12,106,904 | 100% | Tracks | |
| 98 ms | 12,106,904 | 100% | No tracking | |
| 106 ms | 12,106,903 | 100% | Not stated | |
| 128 ms | 12,106,904 | 100% | No tracking | |
| 171 ms | 12,106,904 | 99.3% | Tracks | |
| 183 ms | 12,106,904 | 100% | Limited | |
| 188 ms | 12,106,904 | 100% | Limited | |
| 192 ms | 12,106,904 | 100% | Not stated | |
| 241 ms | 12,106,903 | 23.3% | Limited | |
| 246 ms | 12,106,903 | 100% | Limited | |
| 307 ms | 12,106,904 | 99% | Limited |
Failed at the last check (16)
| Endpoint | Latency | Block | Uptime 24h | Privacy |
|---|---|---|---|---|
| Offline · HTTP 503 | — | 16.7% | No tracking | |
| Offline · HTTP 429 | — | 0.7% | Tracks | |
| Offline · HTTP 403 | — | 0% | Limited | |
| Offline · fetch failed | — | 0% | Not stated | |
| Offline · You've reached the usage limit for your current plan. To continue with higher li | — | 4.9% | No tracking | |
| Offline · HTTP 401 | — | 0% | Limited | |
| Offline · connection error | — | 0% | Limited | |
| Offline · HTTP 521 | — | 0% | No tracking | |
| Offline · connection error | — | 0% | No tracking | |
| Offline · HTTP 401 | — | 0% | Limited | |
| Offline · Unexpected token '<', " <!DOCTYPE "... is not valid JSON | — | 0% | Limited | |
| Offline · timeout | — | 0% | Not stated | |
| Offline · timeout | — | 0% | Not stated | |
| Offline · HTTP 400 | — | 0% | Not stated | |
| Offline · chain is not available on free plan, please upgrade to paid plan | — | 0% | Not stated | |
| Offline · HTTP 429 | — | 0% | Not stated |
Latency: one eth_blockNumber request from our server every 5 minutes. Block: height reported by the endpoint; a minus shows how many blocks it lags behind the fastest one. Privacy: what the operator declares, from chainlist.org.
Connect to Sepolia RPC: code examples
curl -X POST https://0xrpc.io/sep \
-H 'Content-Type: application/json' \
-d '{"jsonrpc":"2.0","method":"eth_blockNumber","params":[],"id":1}'Sepolia RPC FAQ
What is the chain ID of Sepolia?
Sepolia's chain ID is 11155111 (hex 0xaa36a7). Wallets use it to tell Sepolia apart from other networks and to prevent replaying transactions across chains.
Is there a free Sepolia RPC?
Yes. We list 33 public Sepolia endpoints; 17 answered at the last check. They are free but shared and rate-limited, with no uptime guarantee.
What currency does Sepolia use for gas?
Sepolia Ether (ETH). Testnet tokens have no monetary value.
How do I add Sepolia to MetaMask?
Use “Add to wallet” at the top of this page, or add the network manually with the values in the table under “How to add Sepolia to MetaMask”.
HTTPS or WSS — which should I use?
HTTPS for regular requests such as reading balances or sending transactions; WSS keeps a connection open for subscriptions such as new blocks or logs.
Are public RPC endpoints safe?
A public endpoint cannot move your funds, but it can see your IP address and the requests you send. Check the Privacy column: it shows what each operator says it logs, from chainlist.org.
How often are endpoints checked?
Every 5 minutes. We send one eth_blockNumber request to each HTTPS endpoint and record the response time and block height. An endpoint is marked offline after 3 failed checks in a row.
Does any provider pay to be listed?
No. No provider pays to be listed or to change its place in the table; the order is by measured latency.
How to add Sepolia to MetaMask
- Open MetaMask, open the network menu and choose “Add a custom network”.
- Copy each value from the table into the form.
- Save, then switch to the new network.
- If balances do not load, try another RPC URL from the list above.
- Network name
- RPC URL
- Chain ID
- Currency symbol
- Block explorer URL
Related networks
Network data: ethereum-lists/chains via chainlist.org (synced Nov 7, 2026). Privacy labels: chainlist.org. Latency and uptime: our own checks every 5 minutes. No provider pays to be listed.
How this page works
Sources: chainlist.org, ethereum-lists/chains. Data as of Nov 7, 2026.
Not affiliated with any project listed. Educational content, not financial advice.