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·4 min read·NodeFlare Team

Free Ink RPC Endpoint

Connect to Ink mainnet, chain ID 57073, with NodeFlare. Try a public RPC request or use a free key with 3M CU/month. Includes curl and wallet setup examples.

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Plan allowance update, 2 October 2026: NodeFlare monthly CU bundles increased by 50%. See current pricing and dated provider comparisons.

Ink is Kraken's OP-Stack L2 and part of the Superchain. NodeFlare operates an Ink node and exposes standard Ethereum JSON-RPC through its gateway. Use the public endpoint for a lightweight check; use an API key for an application workload.

Ink RPC URLs

Public endpoint — no API key:

https://rpc.nodeflare.app/ink/public

Keyed endpoint (free account — higher limits, heavy methods):

https://rpc.nodeflare.app/ink/v1/{YOUR_KEY}

Get your free key → — no credit card.

Quick start

Terminal
curl https://rpc.nodeflare.app/ink/public \
  -X POST \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","method":"eth_chainId","params":[],"id":1}'

Expected: {"jsonrpc":"2.0","id":1,"result":"0xdef1"} — Ink's memorable chain ID, 57073.

JavaScript
import { ethers } from 'ethers';

const provider = new ethers.JsonRpcProvider(
  'https://rpc.nodeflare.app/ink/public'
);
console.log('Ink block:', await provider.getBlockNumber());

Ink at a glance

ParameterValue
Chain ID57073 (0xdef1)
CurrencyETH
TypeOP-Stack rollup (Superchain)
Block time~1 s
Explorerexplorer.inkonchain.com

Ink doubles the standard OP-Stack cadence to 1-second blocks — 86,400 blocks a day, so adjust block-range arithmetic accordingly. Full per-method notes live in the Ink method reference.

Free tier

  • 3,000,000 compute units/month — no credit card
  • eth_getLogs (25 CU) and supported trace/debug methods (100 CU) consume the allowance; check Ink method support before relying on a namespace
  • 10 requests/second with a free key; public no-key requests are limited to one per ten seconds per IP
  • Every supported chain under one key
  • Multi-region routing with automatic failover

Add Ink to MetaMask

FieldValue
Network nameInk
RPC URLhttps://rpc.nodeflare.app/ink/public
Chain ID57073
Currency symbolETH
Block explorerhttps://explorer.inkonchain.com

FAQ

What is the Ink RPC URL? https://rpc.nodeflare.app/ink/public — free, no API key, rate-limited per IP.

What is Ink's chain ID? 57073 — hex 0xdef1, a nod to DeFi.

Can I index Ink from genesis? Check the earliest block available from the endpoint and its log-range limits before planning a backfill. Scan bounded ranges with an API key, resume from a checkpoint and handle quota errors. A chain's launch date alone does not guarantee that a provider retains all historical state or logs. See rate limits and compute costs.

Building on Ink? Get your free NodeFlare key → — one key for every chain we serve.