Independent review. IonBin has no partnership with Kit (formerly ConvertKit) and was not paid for this page. Our evaluation is our own, based on public documentation and our research. Product names are trademarks of their owners and are used for identification only. How disclosure works.
Email marketing for creators, with automations, landing pages and digital product sales. The Kit MCP, included from the Creator plan, lets AI clients read and write subscribers, sequences, broadcasts and tags, and asks for confirmation before sends or deletes.
Kit's Free plan covers up to 10,000 subscribers. At 1,000 subscribers, Creator is $390 billed yearly (about $33/month) and adds the Kit MCP and visual automations; Pro was shown with a limited first-year discount. Prices rise with list size. Checked 2026-10-17. source ↗
Read operations run without prompts. Sending broadcasts, deleting data and other destructive or external actions always need explicit user confirmation in supported clients. source ↗
How Kit (formerly ConvertKit) connects to each AI platform: native connector or MCP, API through code the agent writes, browser control, or file upload.
| Platform | MCP / connector | API (agent-written code) | Browser | Upload / export |
|---|---|---|---|---|
| Claude (incl. Claude Code) | Not documented Kit (formerly ConvertKit) has an official MCP server and Claude (incl. Claude Code) supports MCP, but Kit (formerly ConvertKit)'s docs don't name this pairing. Auth setup may differ. Kit (formerly ConvertKit) MCP docs ↗Claude (incl. Claude Code) MCP docs ↗ | Confirmed Claude (incl. Claude Code) can run code; Kit (formerly ConvertKit) publishes an API. Kit (formerly ConvertKit) API ↗Claude (incl. Claude Code) docs ↗ | Confirmed Claude Code with the Claude in Chrome extension (Chrome, Edge and other Chromium browsers) Claude (incl. Claude Code) browser docs ↗ | Confirmed Export from Kit (formerly ConvertKit), then works on the files in your project; chat accepts attachments Claude (incl. Claude Code) docs ↗ |
| OpenAI Codex | Not documented Kit (formerly ConvertKit) has an official MCP server and OpenAI Codex supports MCP, but Kit (formerly ConvertKit)'s docs don't name this pairing. Auth setup may differ. Kit (formerly ConvertKit) MCP docs ↗OpenAI Codex MCP docs ↗ | Confirmed OpenAI Codex can run code; Kit (formerly ConvertKit) publishes an API. Kit (formerly ConvertKit) API ↗OpenAI Codex docs ↗ | Confirmed Only in the ChatGPT desktop app; not in the Codex CLI or IDE extension OpenAI Codex browser docs ↗ | Confirmed Export from Kit (formerly ConvertKit), then works on local repositories OpenAI Codex docs ↗ |
| Google Antigravity | Not documented Kit (formerly ConvertKit) has an official MCP server and Google Antigravity supports MCP, but Kit (formerly ConvertKit)'s docs don't name this pairing. Auth setup may differ. Kit (formerly ConvertKit) MCP docs ↗Google Antigravity MCP docs ↗ | Confirmed Google Antigravity can run code; Kit (formerly ConvertKit) publishes an API. Kit (formerly ConvertKit) API ↗Google Antigravity docs ↗ | Confirmed Browser subagent via /browser, documented as an Antigravity App feature; the IDE has separate browser docs Google Antigravity browser docs ↗ | Confirmed Export from Kit (formerly ConvertKit), then works on local projects and worktrees Google Antigravity docs ↗ |
Confirmed means both the tool's and the platform's official docs describe that route (links in the cell); IonBin has not tested every pairing. Not documented means it may work, but no official docs describe that route end to end. Checked Oct 17, 2026.
| Level | Status | Detail / source |
|---|---|---|
| Native connector / MCP | Yes | Official docs ↗ |
| API / CLI | Yes | Official docs ↗ |
| Browser-only | No | Web app; also reachable programmatically |
| Bulk upload / import | Yes | Import subscribers from a CSV (https://help.kit.com/en/articles/2502555-how-to-import-a-subscriber-list) |
Recorded Oct 17, 2026. Setup and plan limits vary; check the vendor's docs. How levels are assigned.
Marketing content & social Swap-in
Via its official MCP server, from MCP-capable platforms such as ChatGPT, Claude, Gemini (Google), Google Antigravity, OpenAI Codex.
Via its API, through automation hubs: Gumloop, Make, n8n, Zapier.
No long-form review yet. Verdict is based on research, not hands-on testing.
Newsletter platform with growth and monetization tools such as referrals, an ad network and paid subscriptions. The beehiiv MCP (Lite plan and up) lets Claude or ChatGPT analyze your content, audience and performance.
Developer-friendly email API for transactional mail and broadcasts. IonBin's newsletter is set up to use Resend (not yet live).
