domain-check-skill vs AgentDiet B2A Email Deliverability, MX, SPF & DMARC Verifier
domain-check-skill is a plugin bundle for AI coding tools published by PleasePrompto. Marketplaces we read that list it: 1 (Claude Code: claude-plugins-community). AgentDiet B2A Email Deliverability, MX, SPF & DMARC Verifier is an MCP server published by agentdiet.dev. Marketplaces we read that list it: 1 (Official MCP Registry). As of our marketplace pass on 2026-10-20. 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 |  domain-check-skill | |
|---|---|---|
| Claude Code: claude-plugins-community | Listed Version: 1.0.0 Forks (GitHub): 2 Stars (GitHub): 6 Not marked · First seen |
Not listed |
| Official MCP Registry | Not listed | Listed Version: 7.0.15 No figure published 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 | domain-check-skill | AgentDiet B2A Email Deliverability, MX, SPF & DMARC Verifier |
|---|---|---|
| Marketplaces that list it | 1 | 1 |
| Stars (GitHub) (differs) | 6 | No figure on GitHub |
| Forks (GitHub) (differs) | 2 | No figure on GitHub |
| Last release | Not published | Not published |
| Where it runs (differs) | Installs as a plugin bundle | Remote server (email-verify.agentdiet.dev/mcp) |
| Transport (differs) | Not stated | Streamable HTTP |
| Tools it declares | Not published | Not published |
| Environment variables it asks for | Not published | Not published |
| Parts of the bundle (differs) | 1 | Not a bundle |
| Licence (differs) | MIT | Not stated |
| Repository (differs) | github.com/pleaseprompto/domain-check-skill | Not stated |
| Changes in the last 7 days (differs) | 0 | 2 |
| First seen (differs) | 2026-10-11 | 2026-10-19 |
| Endpoint at the last check (differs) | no remote endpoint we check | 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
domain-check-skill
Ask your AI coding agent if a domain is free — and get a real answer. Works for any TLD, including .de / .eu / .at / .ch where most checkers give up. Plugin for Claude Code. Pure Python, zero setup.
AgentDiet B2A Email Deliverability, MX, SPF & DMARC Verifier
Validates email syntax, disposable/burner provider status, role accounts, and live DNS MX/SPF/DMA.
How to run each
domain-check-skill As a Claude Code plugin
/plugin marketplace add anthropics/claude-plugins-community
/plugin install domain-check-skill@claude-communityAgentDiet B2A Email Deliverability, MX, SPF & DMARC Verifier As a remote MCP server
claude mcp add --transport http email-verify https://email-verify.agentdiet.dev/mcpCommands 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
Neither one's marketplaces publish the settings it asks for.
What it can do: domain-check-skill · What it can do: AgentDiet B2A Email Deliverability, MX, SPF & DMARC Verifier · Compare two other plugins
Data comes from the public marketplace file https://github.com/anthropics/claude-plugins-community/blob/HEAD/.claude-plugin/marketplace.json. 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.