⚠ NOTICE:
Since 6.0.0, the JSON-API has been deprecated. If you are building a new application, you should use the new WP-REST API.
To use the old JSON-API, first enable it at: Settings → Bitcoin and Altcoin Wallets/em> → Frontend UI Settings/em> → Legacy JSON-API v3 (deprecated).
The reference for both the WP-REST API and the old JSON-API can be found in the built-in documentation:
In your WordPress admin screens, navigate to: Wallets Admin Docs → wallets → Developer reference.
The Developer reference is also available on github.