Resend vs Outlook
Resend is an MCP server published by resend. Marketplaces we read that list it: 1 (Docker MCP Catalog). Outlook is an MCP server published by mcp-z. Marketplaces we read that list it: 1 (Official MCP Registry). As of our marketplace pass on 2026-10-24. 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 | |
|---|---|---|
| Docker MCP Catalog | Listed Version: sha256:2a786579214e Forks (GitHub): 90 Pulls (Docker Hub): 22 096 Stars (Docker Hub): 5 Stars (GitHub): 576 Not marked · First seen |
Not listed |
| Official MCP Registry | Not listed | Listed Version: 2.2.3 Downloads/month (npm): 1 612 Downloads/week (npm): 464 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 | Outlook |
|---|---|---|
| Marketplaces that list it | 1 | 1 |
| Stars (GitHub) (differs) | 576 | No figure on GitHub |
| Pulls (Docker Hub) (differs) | 22 096 | No figure on Docker Hub |
| Forks (GitHub) (differs) | 90 | No figure on GitHub |
| Last release (differs) | Not published | 2026-10-12 |
| Where it runs (differs) | On your machine (mcp/resend) | On your machine (@mcp-z/mcp-outlook) |
| Transport | stdio | stdio |
| Tools it declares (differs) | 1 | Not published |
| Environment variables it asks for (differs) | 3, secrets among them: 1 | 13, secrets among them: 1 |
| Licence (differs) | MIT | Not stated |
| Repository (differs) | github.com/resend/mcp-send-email | Not stated |
| Changes in the last 7 days | 0 | 0 |
| 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.
Outlook
Outlook integration with OAuth, message search, batch operations, and calendar management
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)
Outlook As a local MCP server: npm package
claude mcp add --env "MS_CLIENT_ID=<YOUR_MS_CLIENT_ID>" --env "MS_CLIENT_SECRET=<YOUR_MS_CLIENT_SECRET>" --env "MS_TENANT_ID=<YOUR_MS_TENANT_ID>" --transport stdio mcp-outlook -- npx -y @mcp-z/mcp-outlookRequires: MS_CLIENT_ID, MS_CLIENT_SECRET (secret), MS_TENANT_ID
Commands built only from what the marketplaces declare; the full set for every client is on each card.
Tools each declares
The marketplaces of Outlook 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 Outlook asks for
AUTH_MODEBASE_URLDCR_MODEDCR_STORE_URIDCR_VERIFY_URLHEADLESSLOG_LEVELMS_CLIENT_IDMS_CLIENT_SECRET (secret)MS_TENANT_IDPORTREDIRECT_URI
Show the remaining 1
RESOURCE_STORE_URI
Settings as each marketplace publishes them. Asking for fewer is not better in itself.
What it can do: Resend · What it can do: Outlook · 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.