Al-Nuzum solutions work on the data of your CRM. No sign-up: a connection lives in this browser, only this browser sees it, and one button turns it off.
API key: Settings → Users → your user → «Security» → «New API key». No password needed, and the key can be revoked at any time.
The external API is required: on Odoo Online only the Custom plan has it; your own Odoo works over https.Nothing connected yet.
Tokens and keys are encrypted (AES-256-GCM) and reachable only from this browser's session. We write into the CRM only what you start yourself, and every write is logged.