Discovered · unverified
MX Probe
Email verification for AI agents. One call returns send, hold or kill for an address, with the reason. The free DNS tier runs locally, no key needed. With an API key the survivors go to the hosted SMTP probe: 9 USD per 10,000 checks, 100 free at signup, credits never expire. The signup tool creates the key by API, so an outreach agent provisions itself. No dashboard, no CAPTCHA. Docs for agents: https://mxprobe.dev/llms.txt. OpenAPI: https://mxprobe.dev/openapi.json. Source: https://github.com/andrewchmr/mxprobe (MIT).
Check the source before connecting.
Vendor ownership, pricing, documentation, and execution are not verified for this discovery record. Appearing in the official MCP registry does not mean this server is vendor-owned or tested.
Relevance and review status.
Awaiting triage. Method: not yet classified.
Task signals: email, email verification, outreach.
Setup and documentation.
No verified installation steps or callable endpoint are supplied by this discovery record. Follow the original repository or directory entry to inspect current setup instructions, permissions, and authentication.
Source receipts.
- smithery · Observed 2026-10-17
Discovery ID: c652f3ea0430da021c15. Snapshot: 2026-10-17. Read this record as JSON · Full discovery dataset.
Submit primary documentation for review · Connect your agent to GTMMCPs