Watching a Solana wallet without running your own RPC node

Description and use

A lightweight automation that polls a Solana wallet every 5 minutes via the public RPC, diffs against the last balance, and sends a Telegram alert with a Solscan link when a threshold is exceeded.

Problem

Need to monitor a Solana wallet’s balance changes without paying for infrastructure or running a dedicated RPC node.

Outcome

A lightweight, cost‑free wallet watcher that alerts on significant balance changes via Telegram, using only the public Solana RPC.

Workflow

• Poll every 5 minutes using getBalance for SOL and getTokenAccountsByOwner for SPL tokens against api.mainnet-beta.solana.com.
• Store the last known balance in a simple key‑value store (e.g., n8n static data, Sheet, or Redis).
• Diff the new balance against the stored value and check if the change exceeds a user‑defined threshold.
• If threshold exceeded, send a Telegram message containing the delta and a Solscan link to the transaction.

Evidence

Poll every 5 minutes — getBalance for SOL, getTokenAccountsByOwner for SPL tokens, against the public RPC endpoint. No auth, no key.

Source

Alert with context — a Telegram message with the delta and a link straight to the transaction on Solscan, so you don't have to go look it up.

Source