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. If this page is not opened for 30 days, the connection turns itself off and its keys are erased.
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.