# mailverdict Muse connector

From musedirectory.ai, the independent directory of Meta Muse connectors. Not affiliated with Meta.

## mailverdict

Validate email addresses: detect disposable accounts, typos, and check deliverability.

- Record: https://musedirectory.ai/connector/mailverdict
- Category: Developer Tools
- Developer: mailverdict
- Muse status: Extra setup. Not in Muse's Connectors list yet. Muse can still use it: its page gives you a request to paste into Muse.
- Health: Working, 142ms, checked 2026-09-28T08:16:11Z
- Endpoint: https://api.mailverdict.dev/mcp
- Auth: No account needed; Pricing: unknown
- Screening: Screened, no issues found (2026-09-24T22:51:03Z)
- Source: Found in the official MCP Registry (dev.mailverdict/mailverdict) https://registry.modelcontextprotocol.io/v0/servers?search=dev.mailverdict%2Fmailverdict

Checks email addresses for syntax errors, disposable/burner domains, role accounts, free providers, and typos. Performs MX record lookups and returns a deliverability score. No API key required.

Example request: "Check if a customer's email address is valid and deliverable before sending them a receipt."

How to connect: Not in Muse's Connectors list yet, but Muse can still use it. Paste this into Muse: "Use mailverdict to help me. It is a free service with an MCP server at https://api.mailverdict.dev/mcp. It does not need an API key. Ask me before you share anything with it." Muse asks before it shares anything with the app's site. Meta does not review apps used this way, so only use ones you trust. We tested this in the Muse app on September 24, 2026: Muse used an app's link directly this way and returned a live answer.

Tools:
- check_email: Check an email address: syntax, disposable/burner domain, role account, free provider, typo suggestion, MX records. Returns result (deliverable|undeliverable|risky|unknown), reason, score 0-100, and per-signal booleans.
- check_domain: Check a domain: disposable/burner list membership, free-provider status, typo suggestion, MX records.

Screening checks:
- MCP handshake: pass (Answered in 99ms)
- Domain against threat feeds (Cloudflare security DNS): pass (api.mailverdict.dev not flagged)
- Published packages against the OSV malicious-package database: n/a (No npm or PyPI package published)
- Hidden instructions or invisible characters in tool text: pass (2 tools read, nothing found)
- Inputs asking for passwords, card numbers or seed phrases: pass (None found)
- Domain and redirects: pass (No redirects off the domain)
- AI review of purpose and tool behavior: pass (No concerns)