Sendly

Sendly is an email platform for product teams: a transactional sending API, campaigns, visual workflow automations, contacts with custom fields, lists, dynamic segments, topic preferences, suppressions, sending-domain setup and analytics. The Sendly plugin lets ChatGPT run that workspace from your own account: look up contacts and segments, explain how last week's emails performed, draft a campaign or a template, build a multi-step onboarding workflow from a plain-language brief, check why mail from a domain is not landing, validate addresses, manage suppressions and topics, and — only when you explicitly confirm — send.

Sending is treated as the dangerous action it is. Access runs through OAuth 2.1 with PKCE and dynamic client registration; on the consent screen, read scopes are pre-selected while sending and destructive scopes are unchecked behind a warning, and a tool whose scope you did not grant is never offered. Sending a campaign is two-step: the first call reports the audience size and asks, and only a second call carrying an explicit confirmation sends. Test sends can reach only your own verified address. Mail can only go out from domains you have verified, every project has daily and monthly sending caps tied to its trust tier, and destructive tools are annotated so clients can ask before running them.

The plugin sells nothing in-tool, generates no images, video or audio, and serves no ads. Address validation and list cleaning are metered features of your Sendly plan.