Polygon RPC Endpoint

Flat-rate Polygon RPC provider and Polygon RPC node access: free tier, no KYC, HTTP & WebSocket. Polygon mainnet chain ID 137.

Polygon PoS is a high-throughput EVM-compatible chain that scales Ethereum with sub-cent transaction fees and 2-second block times. With years of production use, deep stablecoin liquidity, and major brand adoption, Polygon remains one of the most widely-deployed scaling solutions.

About Polygon

Polygon (formerly Matic) launched its proof-of-stake chain in May 2020 and has since grown to be one of the most widely-used EVM chains by both developer and enterprise adoption. The chain uses a heavily-modified Bor (Geth fork) execution client validated by a Heimdall (Cosmos-SDK) consensus layer.

Polygon Labs has been expanding into a broader ecosystem with the AggLayer, Polygon zkEVM, and chain-development kits (CDK). Polygon PoS itself processes 3-5M transactions per day and hosts major brands and stablecoin issuers including Aave, Uniswap, USDC, USDT, Starbucks (loyalty), Adidas, and Reddit Collectible Avatars.

Common Use Cases on Polygon

• Stablecoin payments and remittance
• DeFi (Aave V3, Uniswap V3, Quickswap, Curve)
• Enterprise tokenization (Starbucks, Adidas, Reddit)
• Gaming and NFTs (high-volume, low-fee)
• Layer-2 deployment via Polygon CDK

Polygon Ecosystem

Aave V3 (top non-Ethereum deployment), Uniswap V3, QuickSwap, Curve, Balancer, OpenSea (NFTs). Polygon has deep stablecoin liquidity — USDC and USDT both have $1B+ supply on the chain.

Polygon Mainnet RPC URL (HTTP)

Polygon WebSocket RPC URL

Quick Start: Connect to Polygon

cURL

curl -X POST https://rpc.swiftnodes.io/rpc/polygon?key=YOUR_API_KEY \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","method":"eth_blockNumber","params":[],"id":1}'

ethers.js

import { JsonRpcProvider } from "ethers";

const provider = new JsonRpcProvider(
  "https://rpc.swiftnodes.io/rpc/polygon?key=YOUR_API_KEY"
);

const blockNumber = await provider.getBlockNumber();
console.log("Polygon block:", blockNumber);

viem

import { createPublicClient, http } from "viem";

const client = createPublicClient({
  transport: http("https://rpc.swiftnodes.io/rpc/polygon?key=YOUR_API_KEY"),
});

const blockNumber = await client.getBlockNumber();

web3.py

from web3 import Web3

w3 = Web3(Web3.HTTPProvider("https://rpc.swiftnodes.io/rpc/polygon?key=YOUR_API_KEY"))
print("Polygon block:", w3.eth.block_number)

Add Polygon to MetaMask

Bridging to Polygon

Official Polygon PoS Bridge (https://portal.polygon.technology) for canonical bridging from Ethereum (~30 min deposits, 1-3 hour withdrawals via checkpoint). Stargate, Across, and Squid for fast cross-chain.

Features of SwiftNodes for Polygon

• Load-balanced across multiple upstream nodes wherever a chain has more than one, with automatic failover
• Health-checked every 2 minutes with automatic failover
• Free tier available — no credit card or KYC required
• Flat-rate monthly pricing with no per-request fees
• HTTP and WebSocket support
• One API key works across all 75+ supported chains, including Polygon

Rate Limits

Frequently Asked Questions: Polygon

Polygon RPC methods

Measured weekly through this endpoint: what each method returns on Polygon, its limits, and an example request.

• eth_getLogssupported
• eth_getBlockReceiptssupported
• eth_feeHistorysupported
• eth_getProofsupported
• eth_createAccessListsupported
• debug_traceCallsupported
• trace_blocksupported
• trace_transactionnot available

Polygon guides from the blog

• Best Polygon RPC Providers (2026): Pricing, Free Tiers and Limits ComparedSeven Polygon PoS RPC providers compared on current pricing, free tiers and measured limits, including why Polygon's shallow default state matters. Pricing checked October 3, 2026.
• Polygon vs Polygon zkEVM: Which RPC Do You Need?They share a name and a parent company, but Polygon PoS and Polygon zkEVM are two separate chains — different chain IDs, different gas tokens, different security models, and very different liquidity. Here's how to tell which RPC endpoint your app actually needs.
• Polygon RPC: The Gateway L2 for High-Throughput dAppsPolygon PoS delivers 2-second blocks and sub-cent gas fees with chain ID 137. Here's how to query it and what makes it different from zkEVM rollups.

Related EVM chains

Explore RPC endpoints for other EVM networks on SwiftNodes: