Ink RPC Endpoint

Fast, flat-rate Ink RPC node provider — free tier, no KYC, HTTP & WebSocket.

Ink is an optimistic rollup built on Optimism's OP Stack and incubated by Kraken, giving exchange users an Ethereum layer 2 with one-second blocks and ETH-denominated fees.

About Ink

Ink launched in December 2024 as part of Optimism's Superchain, so it inherits the standard OP Stack security model: transactions are ordered by an L2 sequencer and posted to Ethereum, where a fraud-proof window secures the state root. Being OP Stack means the tooling, predeploys and withdrawal flow match other chains in that family.

Gas is paid in ETH at layer-2 prices, and blocks arrive roughly once a second — fast enough that polling strategy matters more than on Ethereum itself. If you are indexing Ink, subscribe or poll tightly and handle reorgs at the sequencer level rather than assuming Ethereum cadence.

Common Use Cases on Ink

• Exchange withdrawals to L2
• DeFi on the Superchain
• Consumer payments
• NFT marketplaces

HTTP Endpoint

WebSocket Endpoint

Quick Start: Connect to Ink

cURL

curl -X POST https://rpc.swiftnodes.io/rpc/ink?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/ink?key=YOUR_API_KEY"
);

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

viem

import { createPublicClient, http } from "viem";

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

const blockNumber = await client.getBlockNumber();

web3.py

from web3 import Web3

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

Add Ink to MetaMask

Features of SwiftNodes for Ink

• Multiple load-balanced upstream nodes for high availability
• Health-checked every 60 seconds 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 Ink

Rate Limits