andrewchmr/mxprobe
by Various
Email verification for AI agents: send, hold or kill with the reason. CLI, MCP server and hosted API.
MCP
andrewchmr/mxprobe
Added 16 Sept 2026
Overview
andrewchmr/mxprobe is an email verification tool for AI agents. It returns a verdict to send, hold, or kill an email along with the reason. It provides a CLI, an MCP server, and a hosted API.
Best for
Best for
Developers building AI agents that need to check email deliverability risk before sending
Use cases
- Verify an email address before an agent sends a message
- Integrate email verification into an MCP-based agent workflow
- Automate triage of risky emails via CLI or API
How to use
Install
npx mxprobe check hello@example.com # free DNS tier, local, no keyNotes
2 stars on GitHub. Last updated 2026-09-15. Licensed MIT.
Pros
- Multiple interfaces: CLI, MCP server, and hosted API
- Returns a reason for each verdict, aiding agent decisions
- Open source and written in TypeScript
Cons
- Very low adoption (2 stars at the time of writing)
- Single-developer or community project, no corporate backing
- No evidence of production hardening or scale testing
Pairs with
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