Arcjet vs Email Spam Tester
A side-by-side look at the Arcjet and Email Spam Tester MCP servers: transport, auth, tools, quality signals, and the config to install either one in Claude, Cursor, Windsurf or VS Code.
Verdict: choose Arcjet for communication work over a hosted endpoint; choose Email Spam Tester for communication over a hosted endpoint. You can also run both side by side in one mcpServers block.
Which MCP server should you choose?
Choose Arcjet when
- You need dedicated capabilities in the Communication domain.
- You prefer a remote HTTP/SSE transport.
- You want tools like
list-teams, list-sites, create-site.
Choose Email Spam Tester when
- You need dedicated capabilities in the Communication domain.
- You prefer a remote HTTP/SSE transport.
- Its auth model fits you: No auth required.
- You want tools like
get_test_address, wait_for_report, get_report.
Feature & specification comparison
Rows where the two servers differ are marked.
| Spec | ||
|---|---|---|
| Category | Communication | Communication |
| Quality signal | 48/100 · Fair | 82/100 · Excellent |
| Install command | Confirmed | Confirmed |
| Transport | Remote HTTP/SSE | Remote HTTP/SSE |
| Auth | Not declared | No auth required |
| Pricing | Not declared | Free |
| Required env vars | None listed | None listed |
| Verified owner | Community listing | Verified |
| GitHub stars | 1 | 2 |
| Directory activity | 0 views 0 installs 0 upvotes | 6 views 0 installs 2 upvotes |
| Tools | 24 | 4 |
| Full listing | View Arcjet | View Email Spam Tester |
Tools & capabilities
Arcjet tools 24
list-teamslist-sitescreate-siteget-site-keyARCJET_KEYlist-requestsALLOWDENYERRORget-request-detailsexplain-decisionget-site-quota- +12 more on the listing page
Email Spam Tester tools 4
get_test_addressReserve a single-use address to send a draft email to, for a full check. Returns the address and the URL its report will appear at. The address accepts exactly one message and expires after an hour. The email has to be sent by the person, from the platform or mailbox they really send from: half the checks read what that platform adds. The report covers 42 checks (SPF, DKIM, DMARC, reverse DNS, TLS, blocklists, content, links, the Gmail and Yahoo bulk-sender rules) and a plan of what to fix. lang is decided now because the message arrives minutes later over SMTP, which carries no hint of who is waiting for it. What wait_for_report returns quotes check lines in English whatever it is set to; the person following report_url sees their own language.wait_for_reportWait until the message arrives and has been analysed, then summarise it. Call it after the email has been sent to the address from get_test_address. Blocks rather than returning "not ready yet": an agent told to poll writes a sleep loop and usually gives up before the analysis finishes. Provider placement keeps filling in for up to 30 minutes after the report; get_report reads the latest.get_reportRead a report by its slug without waiting, with provider placement so far. The report stays at its link for good and anyone with the link can read it: the checks, the score, the fix plan, and the subject and sender of the email.get_message_sourceThe message exactly as it was received: headers, both bodies, source. Useful when a finding points at a header and the agent needs to see what it actually sent rather than what it believes it sent. The message is kept for an hour after it arrives and then deleted; within that hour anyone with the slug can read it. After that only the report remains.
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.
Arcjet
{
"mcpServers": {
"arcjet": {
"url": "https://api.arcjet.com/mcp"
}
}
}
Email Spam Tester
{
"mcpServers": {
"email-spam-tester": {
"url": "https://email-spam-tester.com/mcp"
}
}
}
Frequently asked questions
Arcjet is categorized under Communication and uses a remote HTTP/SSE transport. Email Spam Tester belongs to Communication and uses a remote HTTP/SSE transport. Pick Arcjet for communication work and Email Spam Tester 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.
Arcjet has no declared pricing — check the project's own site. Email Spam Tester 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 arcjet and email-spam-tester as separate keys in the same mcpServers object, and your assistant will call tools from either one.
On AllMCPs, Arcjet has a quality signal of 48/100 (Fair) with 0 views, 0 installs and 1 GitHub stars. Email Spam Tester has 82/100 (Excellent) with 6 views, 0 installs and 2 GitHub stars.