Developer Overview
Private payments infrastructure. 0% per transaction. Integrate in an afternoon.
Why Senddy for developers?#
Senddy gives you a payments API with three things no other provider offers simultaneously:
Privacy by default#
Every payment is processed using zero-knowledge proofs. Your customers' transaction data never touches your servers, is never stored in a database, and is never at risk of a breach. You can't leak what you don't have.
No per-transaction fee#
| Stripe | Senddy | |
|---|---|---|
| Transaction fee | 2.9% + $0.30 | 0% |
| On a $100 payment | $3.20 | Under $0.01 |
| Settlement | 2 business days | Instant |
| International | +1.5% | Included |
Senddy takes no percentage of payment volume. You cover Base network cost, which runs under a cent per transfer, and relaying is gas-sponsored. Revenue comes from API plans instead of transaction fees.
Familiar developer experience#
Typed TypeScript SDKs for the browser, the server and AI agents, plus a REST API with separate test and live keys.
What you can build#
- E-commerce checkout — Accept private payments at your online store
- Subscription billing — Recurring private payments
- Payroll — Pay employees and contractors privately
- Creator payments — Tips, donations, and subscriptions
- Cross-border payments — Instant international transfers with no fees
- Treasury management — Hold and manage funds privately with yield
Available tools#
| Tool | Description |
|---|---|
| @senddy/core | Keys, notes, Merkle cache and proof witnesses |
| @senddy/client | Transfers, deposits and withdrawals, orchestrated over viem |
| @senddy/node | Headless client for servers and AI agents |
| REST API | Balances, attestation and gas-sponsored relaying over HTTP |
@senddy/sdk is deprecated and has been split into @senddy/core and @senddy/client.
On the roadmap#
Not built yet — see ROADMAP before designing against these:
| Tool | Status |
|---|---|
React hooks (@senddy/react) | Planned |
wagmi bindings (@senddy/wagmi) | Example code only |
| Webhooks | Planned |
| Embeddable checkout | Planned |
| Shopify app | Example code only |
Next steps#
- Quickstart — Get a working integration in 5 minutes
- SDK Reference — Full SDK documentation
- Pricing — Plans and pricing