DMARC Shark — Email DNS Checker vs smbCloud Mail & Auth
DMARC Shark — Email DNS Checker is an MCP server published by dmarcshark.com. Marketplaces we read that list it: 1 (Official MCP Registry). smbCloud Mail & Auth is an MCP server published by smbcloudXYZ. Marketplaces we read that list it: 1 (Official MCP Registry). As of our marketplace pass on 2026-11-07. 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 |   smbCloud Mail & Auth | |
|---|---|---|
| Official MCP Registry | Listed Version: 1.0.0 No figure published Not marked · First seen |
Listed Version: 1.1.0 Downloads/month (npm): 720 Downloads/week (npm): 256 Forks (GitHub): 7 Stars (GitHub): 12 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 | DMARC Shark — Email DNS Checker | smbCloud Mail & Auth |
|---|---|---|
| Marketplaces that list it | 1 | 1 |
| Stars (GitHub) (differs) | No figure on GitHub | 12 |
| Forks (GitHub) (differs) | No figure on GitHub | 7 |
| Last release (differs) | Not published | 2026-10-31 |
| Where it runs (differs) | Remote server (dmarcshark.com/mcp) | Remote server (api.smbcloud.xyz/v1/mcp) |
| Transport | Streamable HTTP | Streamable HTTP |
| Tools it declares | Not published | Not published |
| Environment variables it asks for (differs) | Not published | 1, secrets among them: 1 |
| Licence | Not stated | Not stated |
| Repository (differs) | github.com/skatkov/dmarcshark | github.com/smbcloudxyz/smbcloud-cli |
| Changes in the last 7 days | 0 | 0 |
| First seen (differs) | 2026-10-19 | 2026-10-11 |
| Endpoint at the last check (differs) | Status out of date: no HTTP response at the last check 40 h ago | Responded 23 h ago, requires authentication |
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
DMARC Shark — Email DNS Checker
Check a domain's public SPF, DMARC, MX and DKIM DNS records on demand. No account required.
smbCloud Mail & Auth
Email infrastructure and authentication for developers: domains, inbox routes, auth apps, deploys.
How to run each
DMARC Shark — Email DNS Checker As a remote MCP server
claude mcp add --transport http email-dns-checker https://dmarcshark.com/mcpsmbCloud Mail & Auth As a remote MCP server
claude mcp add --transport http smbcloud-cli https://api.smbcloud.xyz/v1/mcpRequires: SMB_MAIL_API_KEY (secret), --mcp
Commands built only from what the marketplaces declare; the full set for every client is on each card.
Only the endpoint of smbCloud Mail & Auth responded at the last daily check. How we check endpoints
Tools each declares
Neither one's marketplaces publish a list of tools, so there is nothing to compare.
Settings each asks for
The marketplaces of DMARC Shark — Email DNS Checker publish no settings it asks for, so we do not compare settings.
What it can do: DMARC Shark — Email DNS Checker · What it can do: smbCloud Mail & Auth · Compare two other plugins
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.