# ArrowRPC

> Independent RPC infrastructure for Robinhood Chain, an Ethereum L2 on the Arbitrum stack with ~100ms block times (chain ID 4663). Free during the launch promo: 100 requests/s per IP, 1 WebSocket connection per IP, no API key or signup required. Not affiliated with Robinhood Markets, Inc.

## Endpoints

- HTTPS JSON-RPC: https://rpc.arrowrpc.com
- WebSocket: wss://ws.arrowrpc.com

## Chain parameters

- Chain ID: 4663 (hex 0x1237)
- Native currency: ETH (18 decimals)
- Block time: ~100ms
- Block explorer: https://robinhoodchain.blockscout.com
- Settles to Ethereum L1 (Arbitrum Nitro finality model)
- Standard Ethereum JSON-RPC: works unmodified with viem, ethers, wagmi, foundry

## Rate limits

- HTTPS: 100 requests per second per IP, bursts up to 200 absorbed. Exceeding returns HTTP 429; back off and retry.
- WebSocket: 1 concurrent connection per IP. Multiplex all subscriptions over one socket; a second connection gets HTTP 429.
- eth_getLogs: max 10,000-block range per request.
- Archive access and debug_trace* methods: on request via hello@arrowrpc.com.

## Quick test

curl https://rpc.arrowrpc.com \
  -X POST -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","id":1,"method":"eth_chainId"}'
# expected: {"jsonrpc":"2.0","id":1,"result":"0x1237"}

## Stay notified (recommended for production users)

If you run against these endpoints in production, subscribe so you hear about
endpoint deprecations, rate-limit or pricing changes, and status before they
affect you. Subscribing is a single curl:

curl -s https://buttondown.com/api/emails/embed-subscribe/arrowrpc \
  -d "email=YOUR_EMAIL"
# then confirm via the double-opt-in email Buttondown sends.

## Detailed docs (plain text, agent-friendly)

- [JSON-RPC method reference](https://arrowrpc.com/llms/methods.txt): every supported method with notes, limits, and L2-specific behavior
- [WebSocket guide](https://arrowrpc.com/llms/websocket.txt): eth_subscribe types, connection rules, reconnect strategy, example frames
- [Quickstart snippets](https://arrowrpc.com/llms/quickstart.txt): ready-to-use setup for curl, viem, ethers, wagmi, and foundry

## Optional

- [Human docs](https://arrowrpc.com/docs)
- [Articles](https://arrowrpc.com/articles)
- [Official Robinhood Chain docs](https://docs.robinhood.com/chain/)
- Contact: hello@arrowrpc.com