///Snippet library

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Working recipes for the Solana RPC API calls you make every day. Each one uses standard JSON-RPC or PubSub methods: swap YOUR-ENDPOINT for your own URL and run it.

Check a wallet balance Compare slots across commitment levels Stream new slots over WebSocket List a wallet's recent transactions

Check a wallet balance

The smallest useful Solana RPC call. Returns lamports; divide by 1e9 for SOL.

curlCurious mindsgetBalancecurl

Learn the concept: What is a Solana RPC node? →

get-balance.sh

bash

curl https://YOUR-ENDPOINT -s -X POST \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "getBalance",
    "params": ["vines1vzrYbzLMRdu58ou5XTby4qAqVRLmqo36NKPTg"]
  }'

# → {"jsonrpc":"2.0","result":{"context":{"slot":...},"value":<lamports>},"id":1}

Compare slots across commitment levels

Ask the same node for its processed, confirmed and finalized slot to see the gap between them.

TypeScriptDevelopersgetSlotcommitment

Learn the concept: Slots, blocks and commitment levels, explained →

slots.ts

typescript

const RPC = 'https://YOUR-ENDPOINT'

async function getSlot(commitment: 'processed' | 'confirmed' | 'finalized') {
  const res = await fetch(RPC, {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({ jsonrpc: '2.0', id: 1, method: 'getSlot', params: [{ commitment }] }),
  })
  const { result } = await res.json()
  return result as number
}

const [processed, confirmed, finalized] = await Promise.all([
  getSlot('processed'),
  getSlot('confirmed'),
  getSlot('finalized'),
])

console.log({ processed, confirmed, finalized, finalityGap: processed - finalized })

Stream new slots over WebSocket

Open a PubSub connection and print every slot as the node processes it. Includes a keep-alive ping.

JavaScriptTradersslotSubscribewebsocket

Learn the concept: 5 ways to get real-time Solana data, compared →

slot-subscribe.mjs

javascript

// Node 22+ ships a global WebSocket.
const ws = new WebSocket('wss://YOUR-ENDPOINT')

ws.onopen = () => {
  ws.send(JSON.stringify({ jsonrpc: '2.0', id: 1, method: 'slotSubscribe' }))
  // Many providers close idle sockets; a cheap request keeps the line warm.
  setInterval(() => ws.send(JSON.stringify({ jsonrpc: '2.0', id: 2, method: 'getVersion' })), 30_000)
}

ws.onmessage = ({ data }) => {
  const msg = JSON.parse(data)
  if (msg.method === 'slotNotification') {
    const { slot, parent } = msg.params.result
    console.log(`slot ${slot} (parent ${parent})`)
  }
}

ws.onclose = () => console.log('closed: reconnect with backoff in production')

List a wallet's recent transactions

Pull the latest signatures for an address and flag the failed ones. A starting point for wallet analytics.

PythonData analystsgetSignaturesForAddresspython

history.py

python

import requests

RPC = "https://YOUR-ENDPOINT"
ADDRESS = "vines1vzrYbzLMRdu58ou5XTby4qAqVRLmqo36NKPTg"

resp = requests.post(RPC, json={
    "jsonrpc": "2.0",
    "id": 1,
    "method": "getSignaturesForAddress",
    "params": [ADDRESS, {"limit": 20, "commitment": "confirmed"}],
}, timeout=10)

for tx in resp.json()["result"]:
    status = "FAILED" if tx["err"] else "ok"
    print(tx["slot"], tx["blockTime"], status, tx["signature"][:16] + "…")

From lesson to live data

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Every snippet works with a standard Solana RPC, WebSocket or gRPC endpoint. Get yours in under a minute.

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curl https://YOUR-ENDPOINT -s -X POST \ -H "Content-Type: application/json" \ -d '{ "jsonrpc": "2.0", "id": 1, "method": "getBalance", "params": ["vines1vzrYbzLMRdu58ou5XTby4qAqVRLmqo36NKPTg"] }' # → {"jsonrpc":"2.0","result":{"context":{"slot":...},"value":<lamports>},"id":1}

const RPC = 'https://YOUR-ENDPOINT' async function getSlot(commitment: 'processed' | 'confirmed' | 'finalized') { const res = await fetch(RPC, { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify({ jsonrpc: '2.0', id: 1, method: 'getSlot', params: [{ commitment }] }), }) const { result } = await res.json() return result as number } const [processed, confirmed, finalized] = await Promise.all([ getSlot('processed'), getSlot('confirmed'), getSlot('finalized'), ]) console.log({ processed, confirmed, finalized, finalityGap: processed - finalized })

import requests RPC = "https://YOUR-ENDPOINT" ADDRESS = "vines1vzrYbzLMRdu58ou5XTby4qAqVRLmqo36NKPTg" resp = requests.post(RPC, json={ "jsonrpc": "2.0", "id": 1, "method": "getSignaturesForAddress", "params": [ADDRESS, {"limit": 20, "commitment": "confirmed"}], }, timeout=10) for tx in resp.json()["result"]: status = "FAILED" if tx["err"] else "ok" print(tx["slot"], tx["blockTime"], status, tx["signature"][:16] + "…")