Yearn RPC Read Proxy

Endpoint

Supported Chains

• 1 Ethereum Mainnet
• 10 Optimism
• 100 Gnosis
• 137 Polygon
• 146 Chain 146
• 250 Fantom
• 8453 Base
• 42161 Arbitrum One
• 747474 Chain 747474

Supported Methods

• eth_blockNumber Returns the current block number
• eth_chainId Returns the chain ID
• eth_gasPrice Returns the current gas price
• eth_call Executes a call without creating a transaction
• eth_getBalance Returns the balance of an address
• eth_getCode Returns the code at an address
• eth_getStorageAt Returns storage at a position
• eth_getBlockByNumber Returns block by number
• eth_getBlockByHash Returns block by hash
• eth_getTransactionByHash Returns transaction by hash
• eth_getTransactionReceipt Returns transaction receipt
• eth_getTransactionCount Returns transaction count (nonce)
• eth_getLogs Returns logs matching filter
• eth_estimateGas Estimates gas for a transaction

Example Request

curl -v -X POST https://rpc.yearn.fi/chain/1 \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "method": "eth_blockNumber",
    "params": [],
    "id": 1
  }'

Example Response

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": "0x134a5b2"
}

Caching

• - Queries with latest, pending, or absent block parameters are cached for 3 seconds
• - Queries with numeric block parameters are cached for 3600 seconds
• - Batch requests cache each item individually for maximum efficiency

Usage with Libraries

// viem
const client = createPublicClient({
  transport: http('https://rpc.yearn.fi/chain/1')
})

// ethers
const provider = new JsonRpcProvider('https://rpc.yearn.fi/chain/1')