andrewchmr/mxprobe

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 key

Notes

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.

2 stars on GitHub. Last updated 2026-09-15. Licensed MIT.

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

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

Indexed from awesome-mcp-servers-punkpeye and enriched against its public facts.