ChainRouter - Smart EVM RPC routing for wallets & apps

OpenRouter-style API keys for EVM RPCs. One wallet URL with automatic failover across public and custom upstreams, plus health, latency, and usage tracking. Free to start.

Powered by Web5 Nexus. Create a free project, copy /{chainId}/{apiKey} into any wallet as a custom RPC, and ChainRouter hops upstreams when public nodes fail.

Try the live playground with eth_blockNumber, or log in at /login. Machine-readable product summary: /llms.txt. Sitemap: /sitemap.xml.

ChainRouterpowered by Web5 Nexus

Free RPCs that flake out mid-session?We fixed that.

Stop hunting dead public nodes. One URL for your wallet - we switch upstreams when they fail.

  • Free
  • No card
  • Works with any application
Get a free endpointRelatable? ↓
9:41WALLET100%
MetaMask
MetaMask
Networks
Ethereum Mainnet
https://eth.llamarpc.comDown
Add a network
Custom RPC
Paste URL from Discord…
⚠ Request failed - try another free RPC?
Scroll

Sound familiar?

The free-RPC treadmill

Hover or tap the cards - you've lived this loop in every wallet.

Why it keeps breaking

The fix

Paste once. We do the hopping.

Live demo · click a node

One URL. Auto-switch when a node dies.

Same wallet RPC
→
→
→

ChainRouter hops for you - no mid-session RPC swaps.

Product tour

Peek inside the dashboard

Tap a chip or watch it cycle - live previews of what you get after login.

Paid RPC first. Free as failsafe.

Drop Infura, Alchemy, or QuickNode in. We try them by priority - if they die, public nodes take over.

  • · Priority order for Infura / Alchemy / any HTTPS RPC
  • · Verified with eth_chainId + eth_blockNumber before save
  • · Modes: Custom→Free, Custom only, or Free only
Upstream RPCs · Ethereum
Custom → FreeServing from Infura…
  • InfuraP1
    mainnet.infura.io/v3/…
    Serving
  • AlchemyP2
    eth-mainnet.g.alchemy.com/…
    Standby
  • Public APfree
    eth.llamarpc.com
    Standby

Not just MetaMask

Tap a wallet - same custom RPC pattern everywhere.

MetaMask

Settings → Networks → Add a network → Custom RPC. Paste your ChainRouter HTTPS URL.

https://…/{chainId}/cr_••••

Use cases

Who is this for?

Tap a persona - see the before, after, and the one thing you paste.

You use MetaMask (or Rabby) every day

Stop mid-swap RPC roulette

Before

Public RPC dies mid-session → Discord hunt → paste a new URL → hope it sticks.

With ChainRouter

One ChainRouter URL in Custom RPC. When a node flakes, we hop - your wallet stays live.

Settings → Networks → Custom RPC → paste https://…/{chainId}/{key}
  • Works in MetaMask
  • No app install
  • Free to start
Start this use case →

Playground · live JSON-RPC

Fire a call. Watch the hop.

Same idea as your wallet endpoint - if a node flakes, we move on.

Hit Send - we call real public Ethereum RPCs through a tiny demo proxy.

Built for operators

Health ranking, denylists, quotas, and key rotation - the unsexy essentials.

Three steps. Under a minute.

Enough RPC roulette.

Get a free endpoint and point your wallet at something that stays up.

Get started free
Paste one URL. I hop the rest.
Routy