Close vs Mails.ai — Agent Email
Close is an MCP server published by docker. Marketplaces we read that list it: 1 (Docker MCP Catalog). Mails.ai — Agent Email is an MCP server published by mails.ai. Marketplaces we read that list it: 1 (Official MCP Registry). As of our marketplace pass on 2026-10-14. This pair was picked by a reader, not by our comparison rule, so search engines are asked not to index the page.
Where each is published
| Marketplace |  Close | |
|---|---|---|
| Docker MCP Catalog | Listed Version: not stated No figure published Not marked · First seen |
Not listed |
| Official MCP Registry | Not listed | Listed Version: 0.4.0 Downloads/month (npm): 1 182 Downloads/week (npm): 393 Not marked · First seen |
Each figure is the marketplace's own and is never added up across marketplaces. A marketplace that publishes no figure shows none: no number is not zero.
The facts side by side
| Fact | Close | Mails.ai — Agent Email |
|---|---|---|
| Marketplaces that list it | 1 | 1 |
| Last release (differs) | Not published | 2026-10-12 |
| Where it runs (differs) | Remote server (mcp.close.com/mcp) | Remote server (api.mails.ai/mcp) |
| Transport | Streamable HTTP | Streamable HTTP |
| Tools it declares | Not published | Not published |
| Environment variables it asks for (differs) | 1, secrets among them: 1 | 2, secrets among them: 1 |
| Licence (differs) | Apache-2.0 | Not stated |
| Repository | Not stated | Not stated |
| Changes in the last 7 days (differs) | 0 | 1 |
| First seen | 2026-10-11 | 2026-10-11 |
| Endpoint at the last check | not checked yet | not checked yet |
Lines where the two differ have a tinted background and bold values. Where the data itself says which value is better (more marketplaces, a larger figure of the same marketplace, a fresher release, a verified mark on a marketplace that lists both), the better one is also marked green with ▲ and the worse one red with ▼. Where it runs, the transport, the tools, the settings, hooks, the bundle's parts, the licence and the week's changes are marked only as different: more or fewer is not better in itself.
What each says it does
Close
Streamline sales processes with integrated calling, email, SMS, and automated workflows for small and scaling businesses.
Mails.ai — Agent Email
A real inbox for AI agents: send, receive and thread email, behind a prompt-injection firewall.
How to run each
Close As a remote MCP server
claude mcp add --transport http close https://mcp.close.com/mcpRequires: CLOSE_API_KEY (secret)
Mails.ai — Agent Email As a remote MCP server
claude mcp add --transport http agent-email https://api.mails.ai/mcpRequires: MAILS_API_KEY (secret)
Commands built only from what the marketplaces declare; the full set for every client is on each card.
Tools each declares
Neither one's marketplaces publish a list of tools, so there is nothing to compare.
Settings each asks for
Only Close asks for
CLOSE_API_KEY (secret)
Only Mails.ai — Agent Email asks for
MAILS_API_KEY (secret)MAILS_BASE_URL
Settings as each marketplace publishes them. Asking for fewer is not better in itself.
What it can do: Close · What it can do: Mails.ai — Agent Email · Compare two other plugins
Data comes from the Docker MCP Catalog (desktop.docker.com/mcp/catalog) and Docker Hub. Data comes from the Official MCP Registry (registry.modelcontextprotocol.io), CC0 1.0. Figures come from our own regular passes over the marketplaces, last read on . We publish no contact details for plugin publishers.