Resend Email MCP vs Oldweb Diagnostics
A side-by-side look at the Resend Email MCP and Oldweb Diagnostics MCP servers: transport, auth, tools, quality signals, and the config to install either one in Claude, Cursor, Windsurf or VS Code.
O
Oldweb DiagnosticsCommunicationPublic DNS, HTTPS and deployment checks, plus offline email header and delivery-log tracing.36FairAuth: no auth requiredVerdict: choose Resend Email MCP for communication work as a local process; choose Oldweb Diagnostics for communication. You can also run both side by side in one mcpServers block.
Which MCP server should you choose?
Choose Resend Email MCP when
- You need dedicated capabilities in the Communication domain.
- You prefer a local stdio subprocess transport.
- Its auth model fits you: API key required.
- You have the keys it needs:
RESEND_API_KEY. - You want tools like
diagnose_domain, analyze_deliverability, inspect_email.
OChoose Oldweb Diagnostics when
- You need dedicated capabilities in the Communication domain.
- Its auth model fits you: No auth required.
Feature & specification comparison
Rows where the two servers differ are marked.
| Spec | O Oldweb Diagnostics | |
|---|---|---|
| Category | Communication | Communication |
| Quality signal | 60/100 · Good | 36/100 · Fair |
| Install command | Confirmed | Not confirmed yet |
| Transport | Local subprocess (stdio) | — |
| Auth | API key required | No auth required |
| Pricing | BYOK (pay the provider) | Free |
| Required env vars | RESEND_API_KEY | None listed |
| Verified owner | Community listing | Community listing |
| GitHub stars | 1 | 0 |
| Directory activity | 1 views 0 installs 0 upvotes | 0 views 0 installs 0 upvotes |
| Tools | 7 | Not listed |
| Full listing | View Resend Email MCP | View Oldweb Diagnostics |
Tools & capabilities
Resend Email MCP tools 7
diagnose_domainInspects every DNS record (SPF/DKIM/DMARC) and reports what's missing + how to fix itanalyze_deliverabilityAggregates recent sends into delivery/bounce/complaint rates with a health verdictinspect_emailRenders one email's full lifecycle timeline and flags problemsexplain_bounceClassifies a bounce (hard/soft/block) and recommends the actionaudit_accountOne-shot health check of domains, keys, and deliverabilitysearch_logsSmart filtering of API logs by status/path/recipient to find failurestest_sendSafely simulates delivered/bounced/complained via Resend sandbox addresses
Oldweb Diagnostics tools
No tool names declared yet. Check the project README from the listing page.
Ready-to-paste client configs
Paste either block (or both) into your client config, e.g. claude_desktop_config.json or ~/.cursor/mcp.json. We only show a config when the install command is confirmed.
Resend Email MCP
{
"mcpServers": {
"helbertparanhos-resend-email-mcp": {
"command": "npx",
"args": [
"-y",
"resend-email-mcp"
],
"env": {
"RESEND_API_KEY": "YOUR_RESEND_API_KEY_HERE"
}
}
}
}
Oldweb Diagnostics
No confirmed install command for Oldweb Diagnostics yet — follow the setup steps linked from its listing page rather than a guessed package name.
Frequently asked questions
Resend Email MCP is categorized under Communication and uses a local stdio subprocess. Oldweb Diagnostics belongs to Communication and uses an install path we have not confirmed yet. Pick Resend Email MCP for communication work and Oldweb Diagnostics for communication.
Copy the mcpServers block from the config section on this page into your client's config (for example claude_desktop_config.json or ~/.cursor/mcp.json), then fully restart the client. Oldweb Diagnostics has no confirmed install command yet — follow its own setup instructions.
Resend Email MCP is bring-your-own-key: usage is billed by the API provider you supply a key for. Auth: api key required. Oldweb Diagnostics is listed as free. Auth: no auth required. If a server needs environment variables such as API keys, define them under the env key in your client's MCP config.
Yes. MCP clients support multiple servers: add helbertparanhos-resend-email-mcp and oldweb-diagnostics as separate keys in the same mcpServers object, and your assistant will call tools from either one.
On AllMCPs, Resend Email MCP has a quality signal of 60/100 (Good) with 1 views, 0 installs and 1 GitHub stars. Oldweb Diagnostics has 36/100 (Fair) with 0 views, 0 installs and 0 GitHub stars.