Build with Senddy
What you can build with Senddy, which guide to start with, and the packages you'll use.
Senddy gives your app private payments, private swaps and private yield. Your users keep their balances and activity off the public ledger without learning anything new, and you earn a fee on every transaction.
Pick your job#
| You're building | Start with |
|---|---|
| A wallet, payments app or checkout | Accept and send private payments |
| A trading app, token or launchpad | Add private swaps |
| A savings or treasury product | Earn yield on balances |
| Anything that should make money | Set your fee |
| An onramp from other chains | Move money in and out |
| A browser app with social login | Build a web app |
| A backend, bot or AI agent | Run a payments agent |
New to Senddy? Do the Quickstart first. It takes five minutes and every guide builds on it.
What your users get#
- Private by default. Amounts, balances and counterparties never appear on the public ledger.
- Nothing new to learn. No seed phrases to manage for privacy, no proofs to think about, no gas to hold.
- Money from anywhere. They can deposit from their wallet, from another chain, or from an exchange.
What you get#
- One SDK. Typed TypeScript packages for browsers, servers and agents, and an HTTP API.
- A new line of revenue. A flat fee, a percentage, or both, on transfers, swaps, deposits and withdrawals, paid to your address.
- Compliance controls built in. Deposits are screened onchain against sanctions oracles, and activity is risk-checked offchain. See Compliance.
Packages#
| Package | Use it for |
|---|---|
@senddy/client | Everything in a browser or Node app: deposits, transfers, swaps, withdrawals, balances |
@senddy/core | Keys, addresses, notes and proofs, plus contract addresses for each chain |
@senddy/node | Headless agents and servers, with keys from a seed |
| HTTP API | Attestation, relaying, Merkle data and swap quotes. See API reference |
@senddy/sdk is deprecated and broken against the current pools. Use @senddy/client.
Where Senddy runs#
Your users can deposit and withdraw on Base, Ethereum, Solana, Arbitrum, Optimism, Polygon, BNB Chain, Avalanche, Hyperliquid and Robinhood Chain, and withdraw to Lighter. Private balances are held on Base and Robinhood Chain:
| Base | Robinhood Chain | |
|---|---|---|
| Private payments | Live | Live |
| Private swaps | Coming | Live |
| Yield on balances | Live | Live, per asset |
| Deposits from other chains | Live | Live |
Details and addresses are in Choose a chain.