monad

Monad RPC + WSS: what it’s for and how to use it (quickstart)

RPC is for standard requests (blocks, receipts, calls), WSS is for real-time streams (new blocks, logs). Here’s a quickstart + how to test both endpoints.

Panagiotis

— 1 min read
Monad RPC + WSS: what it’s for and how to use it (quickstart)
Photo by Ya-nan Song / Unsplash

If you’re building anything that talks to an EVM chain, you’ll use two “pipes”:

  • RPC (HTTPS) → request/response: read state, call contracts, send transactions
  • WSS (WebSocket) → real-time: new blocks, logs/events, live monitoring

We run public Monad endpoints and snapshots, and we also support an enterprise tier for teams that need higher limits and support.

Endpoints

RPC (HTTPS)
https://monad-mainnet-rpc.natsai.xyz

WSS
wss://monad-mainnet-rpc.natsai.xyz

30-second RPC tests (copy/paste)

Latest block number

curl -s https://monad-mainnet-rpc.natsai.xyz \
  -H "content-type: application/json" \
  --data '{"jsonrpc":"2.0","id":1,"method":"eth_blockNumber","params":[]}'

Chain ID

curl -s https://monad-mainnet-rpc.natsai.xyz \
  -H "content-type: application/json" \
  --data '{"jsonrpc":"2.0","id":1,"method":"eth_chainId","params":[]}'

Real-time with WSS (new blocks)

If you have websocat installed, run:

websocat -t wss://monad-mainnet-rpc.natsai.xyz

Then paste this to subscribe to new blocks:

{"jsonrpc":"2.0","id":1,"method":"eth_subscribe","params":["newHeads"]}

When you should use WSS (instead of polling)

  • You want instant reactions to new blocks (indexers, alerts, monitoring)
  • You want fewer wasted requests vs polling every X seconds
  • You want smoother performance during spikes

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