# MailProbe Muse connector

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

## MailProbe

Verify email addresses are real and can receive mail before you send

- Record: https://musedirectory.ai/connector/mailprobe
- Category: Marketing & Ads
- Developer: jamalofski (https://mailprobe.dev/api-docs/#mcp)
- 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, 126ms, checked 2026-10-29T09:46:04Z
- Endpoint: https://mailprobe.dev/mcp
- Auth: Needs an access key; Pricing: unknown
- Screening: Screened, no issues found (2026-10-28T20:36:17Z)
- Source: Found in the official MCP Registry (dev.mailprobe/mailprobe) https://registry.modelcontextprotocol.io/v0/servers?search=dev.mailprobe%2Fmailprobe

Checks if email addresses exist and can receive mail in real time without sending anything. Returns deliverability status, confidence scores, typo suggestions, and identifies disposable or role addresses. Uses a credit system per address verified.

Example request: "Check if the email addresses on my mailing list are valid before I send out my newsletter"

How to connect: Not in Muse's Connectors list yet, but Muse can still use it. Paste this into Muse: "Use MailProbe to help me. It is a free service with an MCP server at https://mailprobe.dev/mcp. It needs an API key from jamalofski; ask me to enter it through your secure credential prompt. 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:
- verify_emails: Checks whether email addresses exist and can receive mail, in real time and without sending anything. Returns one result per address, in input order. Act on `status`: `valid` is safe to send, `invalid` must not be used, `risky` is accepted but uncertain (catch-all domain, role or
- get_credits: Returns the number of verification credits left on the MailProbe account that owns the API key. Reading the balance uses no credit.

Screening checks:
- MCP handshake: pass (Answered in 1678ms)
- Domain against threat feeds (Cloudflare security DNS): pass (mailprobe.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 (Domain registered 192 days ago)
- AI review of purpose and tool behavior: pass (No concerns)