Best Polygon RPC URL for MetaMask in 2026
When I was setting up MetaMask for Polygon while building RizeCoin, one of the first things I had to enter was an RPC URL. It looked like a web address, but I had no idea what it actually did. I just copied the recommended one and moved on.
That approach works fine for most people. But understanding what you’re entering — and knowing your options — makes troubleshooting easier when something doesn’t connect properly.
The Short Answer: Use This RPC URL
Network Name: Polygon Mainnet
RPC URL: https://polygon-rpc.com
Chain ID: 137
Currency Symbol: POL
Block Explorer: https://polygonscan.com
This is the official public RPC maintained by Polygon. It’s free, requires no account, and works reliably for everyday use. For most beginners, this is all you need.
What an RPC URL Actually Is
An RPC endpoint is the address MetaMask uses to communicate with the Polygon blockchain. When you check your balance, send tokens, or confirm a transaction, MetaMask sends a request to this URL. The RPC server reads the blockchain and sends the information back.
Think of it as a phone number for the blockchain. Without it, MetaMask has no way to reach the network. Different RPC URLs connect to the same Polygon blockchain — they’re just different routes to the same destination.
Alternative RPC URLs Worth Knowing
The public RPC works well for regular use. But if you experience slow connections or timeouts, these alternatives are worth trying:
https://polygon-mainnet.g.alchemy.com/v2/your-api-key
Requires a free account at alchemy.com. More reliable than the public RPC during high network activity. Used by many developers building on Polygon.
Infura (free tier available):
https://polygon-mainnet.infura.io/v3/your-project-id
Requires a free account at infura.io. Another reliable option used widely in the developer community.
QuickNode (free tier available):
Custom URL generated after signup at quicknode.com. Known for low latency and high reliability.
How to Add Polygon RPC to MetaMask
Go to chainlist.org, search “Polygon,” and click “Add to MetaMask.” This fills in all the details automatically including the RPC URL.
Method 2 — Manual:
1. Open MetaMask and click the network selector at the top
2. Click “Add network” → “Add a network manually”
3. Enter the details from the step box above
4. Click Save
Polygon Mainnet usually appears in MetaMask’s suggested networks list. If it does, you can add it with one click without entering any details manually.
Polygon Amoy Testnet RPC
If you want to test transactions without spending real money, use the Amoy Testnet:
RPC URL: https://rpc-amoy.polygon.technology
Chain ID: 80002
Currency Symbol: POL
Block Explorer: https://amoy.polygonscan.com
Testnet POL has no real value. You can get it free from a faucet to practice transactions without risk.
Testnet and Mainnet look identical in MetaMask. The only difference is the network name and Chain ID. Sending real tokens on the testnet means they have no value. Always check which network you’re on before confirming any transaction.
Troubleshooting RPC Connection Issues
The RPC URL may be incorrect or the server is temporarily down. Try switching to an alternative RPC URL.
Transactions are slow or timing out:
The public RPC may be under heavy load. Switch to Alchemy or Infura for more reliable performance.
Wrong network showing after adding:
Double-check the Chain ID. Polygon Mainnet is 137. If you entered a different number, the network won’t work correctly.
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