{"name":"com.mailtester/email-verification","slug":"mailtester-email-verification","title":"MailTester Email Verification","description":"Verify emails (valid/invalid/risky/unknown): MX, SMTP, catch-all, disposable. Free agent key.","url":"https://mcp.market/server/mailtester-email-verification","rating":null,"grade":"B","score":84,"certified":false,"status":"active","category":"email","tags":["email","ai"],"presence":{"score":23,"stars":0,"forks":0,"downloads_week":null,"last_push_at":"2026-10-08T22:03:55.000Z","license":null},"uptime":{"percent":96,"checks":28,"ok":27,"last_checked_at":"2026-11-04T06:20:44.514Z","last_ok_at":"2026-11-04T06:20:44.514Z","latency_ms":408},"claimed":false,"transport":"remote","callable_via_gateway":true,"default_price_micros":0,"repository":"https://github.com/mailtester-com/mailtester-mcp","website":"https://app.mailtester.com/agent-gateway","version":"1.0.1","remotes":[{"type":"streamable-http","url":"https://app.mailtester.com/mcp","headers":[{"description":"Bearer <api_key>. Get a free key (25 verifications/day) with the get_api_key tool or POST https://app.mailtester.com/agent-gateway/register","isSecret":true,"name":"Authorization"}]}],"packages":[],"tools":[{"name":"estimate_cost","description":"Estimate the credit cost of a verification before running it, and whether the user can afford it. Provide either a count of emails, a list_id to re-verify, or an operation ('single'/'finder'). Always quote this before proposing anything billable.","write_action":false,"price_micros":0,"input_schema":{"type":"object","properties":{"emails":{"type":"integer","description":"Number of emails to verify (1 credit each)."},"list_id":{"type":"integer","description":"Estimate re-verifying an existing list by its id."},"operation":{"type":"string","enum":["bulk","single","finder"],"default":"bulk","description":"Operation type: bulk/single (1 credit) or finder (3 credits)."}}}},{"name":"explain_result","description":"Explain what a verification status or reason means in plain English, with a send recommendation. Covers valid, invalid, catch-all/accept-all, unknown, greylisted, disposable, role, free, spam-trap, abuse, do-not-mail, no-mx, disabled, and network. Use when a user asks what a result means.","write_action":false,"price_micros":0,"input_schema":{"type":"object","properties":{"term":{"type":"string","description":"The status/reason to explain, e.g. 'catch-all', 'GREYLISTED', 'unknown', 'role'. Case-insensitive."}},"required":["term"]}},{"name":"get_api_key","description":"Get a free API key for this server (no account needed; 25 email verifications per day). Returns the key once — reconnect with 'Authorization: Bearer <api_key>' to use the other tools.","write_action":false,"price_micros":0,"input_schema":{"type":"object","properties":{"name":{"type":"string","description":"Your agent's name."},"purpose":{"type":"string","description":"What you verify emails for."},"contact":{"type":"string","description":"Optional operator email or URL."}}}},{"name":"get_batch_status","description":"Get the progress and status of a bulk verification list/job by id.","write_action":false,"price_micros":0,"input_schema":{"type":"object","properties":{"list_id":{"type":"integer"}},"required":["list_id"]}},{"name":"get_credit_balance","description":"Get the current credit balance and a short usage summary for the account.","write_action":false,"price_micros":0,"input_schema":{"type":"object","properties":{},"required":[]}},{"name":"get_list","description":"Get the details of a single bulk verification list by its id.","write_action":false,"price_micros":0,"input_schema":{"type":"object","properties":{"list_id":{"type":"integer","description":"The id of the bulk verification list."}},"required":["list_id"]}},{"name":"list_lists","description":"List the user's bulk verification lists/jobs, most recent first.","write_action":false,"price_micros":0,"input_schema":{"type":"object","properties":{"limit":{"type":"integer","minimum":1,"maximum":100,"default":25,"description":"Maximum number of lists to return."}},"required":[]}},{"name":"verify_batch","description":"Verify a batch of email addresses (up to 25 per call with an agent key). Returns per-email verdicts and saves a list. Costs 1 credit per email.","write_action":false,"price_micros":0,"input_schema":{"type":"object","properties":{"emails":{"type":"array","items":{"type":"string"},"description":"Email addresses to verify."},"name":{"type":"string","description":"Optional label for the saved list."}},"required":["emails"]}},{"name":"verify_email","description":"Verify the deliverability of a single email address. Returns a verdict (valid, invalid, risky, unknown). Costs 1 credit.","write_action":true,"price_micros":0,"input_schema":{"type":"object","properties":{"email":{"type":"string","description":"The email address to verify."}},"required":["email"]}}],"scan":{"score":84,"grade":"B","scanned_at":"2026-10-09T18:59:10.395Z","report":{"scannerVersion":"0.1.10","scannedAt":"2026-10-09T18:59:10.362Z","components":{"code":{"score":-1,"max":25,"notes":["remote-only server, no package to scan"]},"reliability":{"score":17,"max":20,"notes":["remote reachable in 2134ms"]},"poisoning":{"score":15,"max":15,"notes":["9 tool descriptions checked"]},"auth":{"score":8,"max":15,"notes":["API key sent as a header"]},"maintenance":{"score":15,"max":15,"notes":["last push 1 days ago"]},"identity":{"score":8,"max":10,"notes":["namespace and repository owner differ","GitHub account older than a year","website matches verified namespace"]}},"findings":[],"inputs":{"probes":[{"url":"https://app.mailtester.com/mcp","reachable":true,"authRequired":false,"latencyMs":2134,"serverInfo":{"name":"MailTester","version":"1.0.0"}}],"packages":[],"repo":{"found":true,"owner":"mailtester-com","repo":"mailtester-mcp","archived":false,"pushedAt":"2026-10-08T22:03:55Z","stars":0,"forks":0,"openIssues":1,"ownerType":"Organization","ownerAvatarUrl":"https://avatars.githubusercontent.com/u/69162895?v=4","ownerCreatedAt":"2020-08-03T17:00:12Z"},"icon":{"url":"https://app.mailtester.com/apple-touch-icon.png","source":"site","width":180,"height":180},"presence":{"stars":0,"forks":0,"downloadsWeek":null,"license":null,"lastPushAt":"2026-10-08T22:03:55.000Z","score":23}}}},"grade_history":[],"reviews":[]}