B2B Email & Domain Scorer MCP Server

by mowaahdev.workers.mohamed-bahaa53000.email-scorer/b2b-email-domain-scorerv1.2.1

Lead email decisions: keep / fix typo / review / drop, plus a ready-to-send list. Paid: RapidAPI

0remoteofficial registry

context tax

~346 tok/turn2 tools

security

92/100

cold start

hosted

freshness

Activetoday

Our reading of B2B Email & Domain Scorer, from the data

B2B Email & Domain Scorer is a email MCP server from mowaah, listed in the official MCP Registry.

Its 2 tools add about 346 tokens to every model turn, lighter than the email median of 1,506 tokens across 71 measured servers (measured 2026-10-19).

Maintenance is active: the last public signal was in the last day (2026-10-19). For comparison, 75% of email servers are active or maintained.

With 0 GitHub stars it ranks #267 of 932 email servers we index.

It runs as a hosted endpoint, so there is nothing to install.

Install B2B Email & Domain Scorer MCP server

claude mcp add --transport http email-scorer https://b2b-email-domain-scorer.p.rapidapi.com/mcp

{
  "mcpServers": {
    "email-scorer": {
      "url": "https://b2b-email-domain-scorer.p.rapidapi.com/mcp"
    }
  }
}

{
  "mcpServers": {
    "email-scorer": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-remote",
        "https://b2b-email-domain-scorer.p.rapidapi.com/mcp"
      ]
    }
  }
}

Or add it as a custom connector under Settings → Connectors. The config above bridges via mcp-remote.

{
  "servers": {
    "email-scorer": {
      "type": "http",
      "url": "https://b2b-email-domain-scorer.p.rapidapi.com/mcp"
    }
  }
}

{
  "mcpServers": {
    "email-scorer": {
      "serverUrl": "https://b2b-email-domain-scorer.p.rapidapi.com/mcp"
    }
  }
}

Remote endpoints

streamable-httphttps://b2b-email-domain-scorer.p.rapidapi.com/mcp
streamable-httphttps://email-scorer.mohamed-bahaa53000.workers.dev/demo/mcp

Context tax

Connecting this server adds ~346 tokens of tool definitions to every model turn (lean, 2 tools). Measured 2026-10-19 via its hosted endpoint; o200k tokenizer, worst case for clients that load all tools up front. How we measure

Model	Per 1,000 turns	With prompt caching
Claude Opus 5.5	$1.38	$0.069
Claude Sonnet 5.5	$0.692	$0.069
Claude Haiku 5.5	$0.035	—

Input prices as of 2026-10-06. Excludes your own prompt and output.

Tools (2)

score_email184 tok
Decide what to do with one lead email: action keep / fix (with the corrected address in send_to) / review / drop, plus a plain-English action_reason. Also returns verdict business / free / role / disposable / risky / invalid / unknown, a 0-100 score, reasons, MX + mail provider, typo suggestion (gmial.com -> gmail.com). Set deep=true to add SPF/DMARC checks. No mail is sent.
score_domain105 tok
Check a company domain (or URL / email): MX records, mail provider (Google Workspace, Microsoft 365, ...), free/disposable flags, and SPF/DMARC. Useful before outreach or when qualifying a lead's company.

Security signals

92/100 — no known issues found as of 2026-10-19, from the checks below. This is not a guarantee of safety; review what a server can do before connecting it.

Deductions

No license detected-5
No security policy (SECURITY.md)-3

Checks

✓Repository hygiene (archived, activity, license, security policy)
✓Tool descriptions (prompt-injection and hidden-text heuristics)
○Package metadata (install scripts, provenance) — pending
○Source scan (secrets, CVEs, risky code) by vectra-guard — pending

Scan it yourself before installing with vectra-guard, the open-source agent security CLI. Scoring rules

Freshness

Active — last maintenance signal today. The newest of the signals below sets the band.

Last commit (default branch)
2026-10-19 · today · GitHub
Latest release
no data · GitHub
Package published
no data · npm/PyPI
Registry entry updated
2026-10-18 · today · official registry · v1.2.1

How it compares in Email

Against the most-starred email servers we index. Token cost is per model turn, measured from each server's live tool list.

Server	Stars	Tools	Tokens / turn	Freshness	Runs
B2B Email & Domain Scorer (this)	0	2	346	Active	hosted
Inbox Zero	12,649	—	not measured	Active	hosted
Useplunk	5,524	—	not measured	Active	local
Google Workspace	3,370	—	not measured	Active	—
OpenOSINT	1,776	—	not measured	Active	local
emailmd	1,382	3	954	Active	local + hosted

All email MCP servers

FAQ

›How do I install the B2B Email & Domain Scorer MCP server in Claude Code?

Run: claude mcp add --transport http email-scorer https://b2b-email-domain-scorer.p.rapidapi.com/mcp. For Cursor, VS Code, Claude Desktop and Windsurf, use the install tabs above.

›Does B2B Email & Domain Scorer require an API key?

No required environment variables are declared in its published metadata.

›Can I use B2B Email & Domain Scorer as a remote (hosted) MCP server?

Yes. It is a hosted MCP server; connect to its URL with any client that supports remote MCP.

›Is B2B Email & Domain Scorer in the official MCP registry?

Yes, as dev.workers.mohamed-bahaa53000.email-scorer/b2b-email-domain-scorer.

›How many tokens does B2B Email & Domain Scorer add to my context?

Its tool definitions total about 346 tokens, resent on every turn.

Sources and method

Official MCP Registry entry: updated 2026-10-18
GitHub repository: fetched 2026-10-19
Tool list (tools/list), measured by us: 2026-10-19
Security signals, computed by us: 2026-10-19
Last checked against all sources: 2026-10-19

The description, packages and links come from the maintainer's own published metadata. Token cost, security signals, freshness and the reading above are MCPSkillHub's own measurements; see the methodology. Spot an error? Request a correction or claim the listing.