Monad RPC — Free Endpoint & Developer Guide

Monad is a high-performance, EVM-compatible layer-1 built around parallel execution for very high throughput. This guide shows how to connect to a free Monad RPC endpoint on MoltNode — no API key and no signup required.

What is Monad

Monad is a layer-1 blockchain designed for throughput. It keeps full Ethereum Virtual Machine compatibility, so the same Solidity contracts, bytecode, and tooling you already use on Ethereum run on Monad without changes, while a re-engineered execution layer focuses on processing transactions in parallel rather than strictly one at a time.

Because Monad is EVM-based, it speaks the standard eth_* JSON-RPC method set, uses regular Ethereum-style addresses, and is identified by an EVM chain ID. The native token is MON, used to pay for gas, and the chain ID is 10143. If you have built on any other EVM chain, your mental model transfers directly: deploy with the same compilers, query with the same RPC calls, and connect the same wallets.

Monad RPC endpoint on MoltNode

MoltNode gives Monad one clean URL that is also a live RPC endpoint:

https://moltnode.ag/monad

There is no API key to provision and no account to create. The endpoint speaks JSON-RPC 2.0 over HTTP POST, and CORS is open so browser apps can call it directly. The URL is intentionally dual-purpose: open it with a GET request in a browser and you get a human-readable page describing the chain; send a POST with a JSON-RPC body and you get a machine response. Same address, two audiences.

To use it as a custom network in a wallet, point the network's RPC URL at https://moltnode.ag/monad, set the chain ID to 10143, and use MON as the currency symbol.

Probe it with curl

The quickest way to confirm the Monad JSON-RPC endpoint is live is to ask for the latest block number:

curl -s https://moltnode.ag/monad \
  -X POST \
  -H 'Content-Type: application/json' \
  -d '{"jsonrpc":"2.0","id":1,"method":"eth_blockNumber","params":[]}'

You will get back a JSON object with a hex-encoded block height in the result field. Swap in any other eth_* method — eth_chainId, eth_getBalance, eth_call — to read whatever you need.

Use it from your app

Any JSON-RPC client works. Here is a minimal example with viem, pointing a custom transport at the free Monad RPC:

import { createPublicClient, http } from "viem";

const client = createPublicClient({
  transport: http("https://moltnode.ag/monad"),
});

const blockNumber = await client.getBlockNumber();
console.log("Monad block:", blockNumber);

The same URL drops into ethers, web3.py, wagmi, or any other library that accepts an HTTP RPC URL — no special configuration beyond the endpoint itself.

Reliability & failover

Behind the single moltnode.ag/monad URL sits more than one upstream provider. Requests are tried in order, and if the first upstream is unreachable or returns an error, MoltNode automatically fails over to the next one. The provider API keys live server-side and are never exposed to your client, so you get the benefit of premium upstreams without managing credentials yourself.

There is no hard rate limit, but the endpoint is a shared, free resource. Please use it responsibly: cache where you can, avoid tight polling loops, and if you are running heavy production workloads, treat MoltNode as a fast default and a failover rather than a single point of dependence.

For humans and agents

The dual GET/POST behavior makes the endpoint friendly to both people and software. A developer can paste https://moltnode.ag/monad into a browser to read about the chain; a script or wallet POSTs JSON-RPC to the same place.

For automated discovery, MoltNode publishes a machine-readable catalog of every supported chain at https://moltnode.ag/api/chains and an agent-oriented summary at https://moltnode.ag/llms.txt. An AI agent can fetch the catalog, find the Monad entry and its endpoint, and start issuing eth_* calls without any human setup.

Closing

The free Monad RPC endpoint at https://moltnode.ag/monad gives you a no-key, JSON-RPC Monad node that works with viem, ethers, wallets, and AI agents alike — with automatic failover handled for you. Point your client at the URL and start building.