JSON-RPC Quickstart

Make your first GoldRush JSON-RPC call. From getting an API key to a balance fetch in under a minute.

Prerequisites

Using any of the GoldRush developer tools requires an API key. If you already have a GoldRush key for any other GoldRush product (Foundational, Streaming, Pipeline, Hyperliquid, x402), you can use it as-is — JSON-RPC uses the same key.

Vibe Coders

$10/mo — Built for solo builders and AI-native workflows.

Teams

$250/mo — Production-grade with 50 RPS and priority support.

1. Export your API key

export GOLDRUSH_API_KEY="cqt_..."

Never commit your API key to source control. Use environment variables or a secrets manager.

2. Pick a chain

The endpoint shape is:

https://rpc.goldrushdata.com/v1/{chain}

Replace {chain} with one of the supported chain slugs. For Ethereum mainnet, that’s eth-mainnet.

3. Make a request

curl

curl https://rpc.goldrushdata.com/v1/eth-mainnet \
  -H "Authorization: Bearer $GOLDRUSH_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "eth_blockNumber",
    "params": []
  }'

4. Where to next

Authentication details

Header reference, error codes, key rotation tips.

Method reference

All 49 methods with parameters, returns, and code examples per chain.

Endpoint details

Archive, debug_*, trace_*, SLA.

Migration guides

Coming from Infura, Alchemy, or Ankr.