Resend vs simplelogin-mcp
Resend is an MCP server published by resend. Marketplaces we read that list it: 1 (Docker MCP Catalog). simplelogin-mcp is an MCP server published by enthouan. Marketplaces we read that list it: 1 (Official MCP Registry). As of our marketplace pass on 2026-10-15. 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 |  Resend |  simplelogin-mcp |
|---|---|---|
| Docker MCP Catalog | Listed Version: sha256:2a786579214e Forks (GitHub): 90 Pulls (Docker Hub): 21 850 Stars (Docker Hub): 5 Stars (GitHub): 576 Not marked · First seen |
Not listed |
| Official MCP Registry | Not listed | Listed Version: 1.0.3 Forks (GitHub): 0 Stars (GitHub): 16 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 | Resend | simplelogin-mcp |
|---|---|---|
| Marketplaces that list it | 1 | 1 |
| Stars (GitHub) (differs) | 576 (better) | 16 (worse) |
| Pulls (Docker Hub) (differs) | 21 850 | No figure on Docker Hub |
| Forks (GitHub) (differs) | 90 (better) | 0 (worse) |
| Last release (differs) | Not published | 2026-10-14 |
| Where it runs (differs) | On your machine (mcp/resend) | On your machine (ghcr.io/enthouan/simplelogin-mcp:1.0.3) |
| Transport | stdio | stdio |
| Tools it declares (differs) | 1 | Not published |
| Environment variables it asks for (differs) | 3, secrets among them: 1 | 4, secrets among them: 1 |
| Licence (differs) | MIT | Not stated |
| Repository (differs) | github.com/resend/mcp-send-email | github.com/enthouan/simplelogin-mcp |
| Changes in the last 7 days (differs) | 0 | 2 |
| First seen | 2026-10-11 | 2026-10-11 |
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
Resend
The official MCP server to send emails and interact with Resend.
simplelogin-mcp
Independent MCP server for SimpleLogin alias, mailbox, domain, settings, and account workflows.
How to run each
Resend As a local MCP server: Docker image
claude mcp add --env "RESEND_API_KEY=<YOUR_RESEND_API_KEY>" --transport stdio resend -- docker run -i --rm -e RESEND_API_KEY mcp/resendRequires: RESEND_API_KEY (secret)
simplelogin-mcp As a local MCP server: Docker image
claude mcp add --env "SL_API_KEY=<YOUR_SL_API_KEY>" --transport stdio simplelogin-mcp -- docker run -i --rm -e SL_API_KEY ghcr.io/enthouan/simplelogin-mcp:1.0.3Requires: SL_API_KEY (secret)
Commands built only from what the marketplaces declare; the full set for every client is on each card.
Tools each declares
The marketplaces of simplelogin-mcp publish no list of tools, so we do not compare tools.
Settings each asks for
Only Resend asks for
REPLY_TO_EMAIL_ADDRESSESRESEND_API_KEY (secret)SENDER_EMAIL_ADDRESS
Only simplelogin-mcp asks for
SL_API_KEY (secret)SL_API_URLSL_REQUEST_TIMEOUT_MSTRANSPORT
Settings as each marketplace publishes them. Asking for fewer is not better in itself.
What it can do: Resend · What it can do: simplelogin-mcp · 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.