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40,885 servers. Updated 2026-11-06 01:54

"Common Lisp" matching MCP connectors:

GET /v1/connectors – MCP directory API reference

Matching Connector Tools:

Email List Validation Email Verification A
com.emaillistvalidation
Verify emails (valid/invalid/risky/unknown): MX, SMTP, catch-all, disposable. Free agent key.
Email Security
91
https://app.emaillistvalidation.com/mcp
Agent Email List — Free SMTP Relay for AI Agents A
com.agentemaillist.ai
Free transactional email + SMTP relay. Agents self-signup, no API key needed to start.
Email Communication
811
https://ai.agentemaillist.com/mcp
ListCheckup
com.listcheckup
Email verification for AI assistants. Check one address or a whole list (valid, invalid, risky, catch-all, unknown, with the reason), with the price shown before any credits are spent. EU-based; catch-all and unknown results are free; 100 free checks a month. Auth: Authorization: Bearer <API key>.
Email Security
1
https://listcheckup.com/mcp
Bulk Email Validator & List Cleaner: MX, Disposable & Typos
io.github.Nero-Engine
Cleans an email list from an Apify dataset, a CSV/Excel file or Google Sheet, keeping every...
Email Data Platforms
1
https://mcp.apify.com/?tools=nerolabs/email-list-cleaner