Status — in development
The API surface is being finalised. Rather than ship endpoints that will change and break your integration, we'll open documentation, a reference, a sandbox and a developer status page once the contract is stable. Until then, the honest answer is: not yet public.
No endpoints, keys or SDKs are published yet. Anything you see described here is planned, not live — consistent with how we label every capability across the platform.
What we intend to offer
- Read APIs for collections, memberships and honest, on-chain-backed ownership data.
- Wallet sign-in built on Sign-In With Ethereum (SIWE) with single-use, domain-bound nonces.
- Webhooks for the events that matter to your integration, with signature verification over the raw body.
- A sandbox environment and versioned reference documentation.
Principles we'll build the API on
- Stable, versioned contracts — we won't break your integration without notice and a migration path.
- Signed webhooks and least-privilege keys — secrets stay server-side, never in the browser.
- Honest data only — no fabricated market metrics or ownership we can't verify on-chain.
- Clear rate limits and predictable error envelopes.
The card program & payments
The crypto-funded card is not yet available and will be delivered through a licensed partner. Any card- or payments-related developer surface will only appear once that partnership and its regulatory approvals are in place. We won't ship a payments API before the underlying product is real.
Early access
Building something that would use OnyxOne, or want to be told when the API opens? Email hello@onyxone.co with what you'd want to integrate.