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The interactive API playground on this site signs every request to sandbox.api.byzantine.fi automatically when you activate your sandbox integrator key here.
Enter a sandbox integrator private key only. Production keys have full account privileges — they must never be entered into a documentation page.
Your private key is imported into the browser’s Web Crypto subsystem as a non-extractable ECDSA P-256 signing key. The raw key bytes are discarded immediately after import and cannot be read back by any script — crypto.subtle.exportKey() on the imported key throws unconditionally.The signing key reference is stored in IndexedDB under a randomly generated session ID. The session ID lives in sessionStorage (per-tab, cleared automatically on tab close). Activation expires after 30 minutes; closing the tab also clears the session.No external libraries are used — all cryptography runs against the browser’s built-in crypto.subtle API. No requests leave your machine during activation.