yuno-auth-and-environments

Authoritative guide to Yuno API credentials, the Sandbox/Production split, and the confirmation ritual required before any money-moving operation. Use whenever authenticating to the Yuno API, choosing or creating API keys, wiring the Yuno MCP server, switching between Test Mode and Live Mode, setting up a sandbox, or picking a base URL. Use BEFORE creating, authorizing, capturing, cancelling or refunding a payment, creating a payment link, creating or cancelling a subscription, creating a customer or recipient, or calling any Yuno MCP tool that writes. Also use for key rotation, allowed-IP restrictions, leaked or committed credentials, and 3DS or test-card setup.