Free Polygon RPC Endpoint
Chain ID 137 · POL · multi-region with automatic failover
Polygon PoS (Chain ID 137) is one of the most-used EVM chains — cheap, fast, and battle-tested. NodeFlare runs a dedicated bor node with the full JSON-RPC surface, including logs and traces.
Public endpoint — no API key
HTTPS
https://rpc.nodeflare.app/polygon/publicNeed higher limits? Use a keyed endpoint https://rpc.nodeflare.app/polygon/v1/{YOUR_KEY} — get a free key →
Connect to Polygon
curl -s -X POST https://rpc.nodeflare.app/polygon/public \
-H 'content-type: application/json' \
-d '{"jsonrpc":"2.0","id":1,"method":"eth_blockNumber","params":[]}'import { ethers } from "ethers";
const provider = new ethers.JsonRpcProvider(
"https://rpc.nodeflare.app/polygon/public"
);
const block = await provider.getBlockNumber();import { createPublicClient, http } from "viem";
const client = createPublicClient({
transport: http("https://rpc.nodeflare.app/polygon/public"),
});
const block = await client.getBlockNumber();from web3 import Web3
w3 = Web3(Web3.HTTPProvider(
"https://rpc.nodeflare.app/polygon/public"
))
print(w3.eth.block_number)Add Polygon to your wallet
Network details for MetaMask, Rabby, or any EVM wallet — Polygon chain ID 137 (0x89).
| Network name | Polygon |
| RPC URL | https://rpc.nodeflare.app/polygon/public |
| Chain ID | 137 |
| Currency symbol | POL |
| Block explorer | https://polygonscan.com |
Built for Polygon
Payments, gaming, NFT platforms, and high-volume dapps on Polygon. Every request routes to the nearest healthy node, with automatic failover and no per-request throttling — the gaps public endpoints leave.
Dedicated Polygon RPC node — your own path, not a shared pool
NodeFlare runs its own dedicated Polygon node on bare-metal — not a reseller of Alchemy or Infura, and not a shared free-for-all pool. A free or paid key gives you a dedicated endpoint path with your own rate limits, no per-request throttling, and full access to heavy methods (eth_getLogs, trace_*, debug_*) — your own Polygon RPC without running the node yourself.
Polygon RPC — FAQ
What is Polygon's chain ID?
Polygon's chain ID is 137 (hex 0x89). Its native currency is POL and its block explorer is polygonscan.com. You can connect with NodeFlare's free public RPC at https://rpc.nodeflare.app/polygon/public — no API key required.
How do I add Polygon to MetaMask?
In MetaMask, open the network menu → "Add a network" → "Add a network manually", then enter — Network name: Polygon; New RPC URL: https://rpc.nodeflare.app/polygon/public; Chain ID: 137; Currency symbol: POL; Block explorer URL: https://polygonscan.com. Save, then switch to Polygon. The endpoint is free and needs no account.
What is the Polygon RPC URL?
NodeFlare's public Polygon RPC URL is https://rpc.nodeflare.app/polygon/public over HTTPS. No API key is required for the public endpoint.
Is the Polygon RPC free?
Yes. The public Polygon endpoint is free with no sign-up. A free API key unlocks higher rate limits, heavy methods, and a dedicated path — 2,000,000 compute units per month, no credit card.
What are the Polygon RPC rate limits?
The public endpoint is limited to 2 requests/second per IP. A free key gives 10 requests/second; paid plans scale to 500 req/s. Every plan includes all 22 supported chains.
Is NodeFlare a good Polygon RPC provider?
NodeFlare is an independent Polygon RPC provider that runs its own nodes — not a reseller or aggregator of third-party backends. The public endpoint is free with no sign-up; a free API key adds higher rate limits, and heavy methods (eth_getLogs, trace_*, debug_*) — 2,000,000 compute units per month, no credit card.
Is there a dedicated Polygon RPC node?
Yes. NodeFlare runs its own dedicated Polygon node(s), and every request is routed to the nearest healthy node with automatic failover. A free or paid key gives you a dedicated endpoint path with your own rate limits and full access to archive methods like eth_getLogs and debug_traceTransaction.
Go deeper
- Full Polygon API reference → — supported methods, WebSocket, regions
- Rate limits & compute-unit costs → — what each method costs against your quota
- Pay per request with x402 → — Polygon calls in USDC from $0.001, no account:
POST /polygon/x402 - RPC for trading bots → and indexers → — low-latency, eth_getLogs-heavy workloads
- Screen a Polygon token for scams → — ownership, honeypot check, holder concentration → one risk score
- Onchain tools for AI agents → — token-safety, wallet intelligence and RPC over MCP / x402
Build on Polygon with a free key
Higher limits, a dedicated path, and automatic failover — every chain included. No credit card.
Get your free API key →Polygon RPC methods
Per-method docs for Polygon — parameters, compute-unit cost, and copy-paste examples.