What is a Proton Testnet RPC?
An RPC endpoint connects wallets and applications to Proton Testnet. Use the endpoints above for JSON-RPC requests, and keep alternatives available for regional endpoint failures or rate limits.
testnetChain ID 110 · XPR
Proton Testnet
Public RPC endpoints and wallet configuration for Proton Testnet.
Network endpoints
Add Proton Testnet to MetaMask
Use “Add to wallet” to request the network configuration. Always verify chain ID 110, currency XPR, and the selected RPC before approving.
Public RPC safety
Public endpoints are third-party infrastructure. They may log requests, enforce limits, or become unavailable. Never place private keys, seed phrases, or secrets in an RPC request.
Common RPC errors
Rate limits, browser CORS rules, network mismatch, and temporary provider failures are common. Try another listed endpoint and verify the returned chain ID.
Proton Testnet RPC FAQ
What is the RPC URL for Proton Testnet?+
https://protontestnet.greymass.com is the recommended endpoint in this directory. Multiple alternatives are listed above in case an endpoint is unavailable from your region.
What is the Proton Testnet chain ID?+
Proton Testnet uses chain ID 110 (0x6e in hexadecimal).
How do I add Proton Testnet to my wallet?+
Use the Add to wallet button above. Your wallet will ask you to review and approve the network details.
Are public RPC endpoints safe?+
Treat public RPCs as infrastructure operated by third parties. They can observe requests, rate-limit traffic, or be unavailable. Never send private keys or seed phrases to an RPC.
Found an issue?
Report a broken RPC →Help keep network data current through a community contribution.