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Verification records what our published tests found on a specific version at a specific date. It is not a warranty, and it does not certify that software is free of defects.

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Catalogue/MCP servers/Mxprobe

Mxprobe

andrewchmr · MCP server

mxprobe verifies email addresses for AI agents. Each address gets a verdict of send, hold or kill with the reason, such as a mailbox the mail server accepted, a catch-all, forwarder or greylisting server, or a domain with no mail server. The DNS check is free and runs locally, while the hosted mailbox probe needs an API key and is charged per check. Tools cover single and batch checks, signing up, checking your balance and buying credits.

Written by ooruby from the README of mxprobe 0.2.6.

Not claimed by its maker. Is this yours? Prove it and answer the findings

Why it's useful

Your agent gets a clear send, hold or kill verdict for each address before any mail goes out.

What you could do with it

  1. 1Ask your agent to verify a batch of email addresses and set aside every one marked kill.
  2. 2Check a single address with the free local DNS tier and read the reason behind its verdict.
  3. 3Have your agent check your remaining balance and buy more credits before a large batch.

Written from its documentation: what it says it can do, not what our checks found.

MXMCP serverSales & CRM

Maintenance

Not measured

No release date is on record for this package yet. The nightly publisher check records one as it reaches each npm package, about once every ten nights.

Release activity only: it says nothing about quality or safety, and a finished small package can be fine without releases. How it is measured

Not yet tested
Data handling disclosed
finding
no statement of what it reads, writes or sends (README.md)

Published because it was found. A finding is information about where the limits are, not a verdict that the software is unsafe.

What this does not cover

  • ·Everything. Treat it as you would software from anywhere else.

Receipt history: every signed receipt for every version of this listing, and what changed between them.

In its maker's words

Email verification for AI agents. One call returns send, hold or kill with the reason. Free DNS tier runs locally; the hosted SMTP probe is 9 USD per 10,000 checks. CLI + MCP server.

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How far this has been checked

Static scanned

What it establishes
Its published package, or for a hosted server its source repository at a recorded commit, was read file by file, without running it, by every check in our current scan.
What it does not
How it behaves when it runs, or anything the scan does not read yet: several rubric checks, the repository's history, and compiled code in folders named dist or build. For a hosted server, that the endpoint runs the code that was read. The ooruby Index sets out exactly what was read.
Exactly what was read
Version 0.2.6, the file with digest sha512-3QEAxYT2omdfGvOvT9reUs1/xnb3jKO2osvt2NNHuHPA+Cf9uGRT685hhTW2Lx+lEgXyT4KYL7Bh+QcAuzrIbQ==, as the registry publishes it. A published version cannot be replaced, so this names the same bytes for anyone who checks.
Authentication
Runs locally. No hosted endpoint is listed for this package. You run it on your own machine, so there is no endpoint of ours to authenticate against.
How the rungs work

Adding it

Paste this into your client's MCP configuration.

{
  "mcpServers": {
    "mxprobe": {
      "command": "npx",
      "args": [
        "-y",
        "mxprobe@0.2.6"
      ]
    }
  }
}

Or run it directly.

npx -y mxprobe@0.2.6

Pinned to 0.2.6, which is the version the findings above were found in. Drop the version to take whatever is newest, and the report on this page stops describing what you installed.

Where this came from

Registry
npm
Package
mxprobe
Version read
0.2.6
Resolved
2026-10-10
Open the source(opens in a new tab)

No build provenance published. The repository above is the one the publisher declared, and nothing links it to the package you would install. That is not a mark against this listing, since most packages are published this way, but it is a check nobody can run.

The badge, if this is your listing

It renders the current rung (static scanned) and links back here, where what that does and does not establish is one click away. It updates itself as the evidence deepens.

[![ooruby: static scanned](https://ooruby.com/api/badge/mxprobe)](https://ooruby.com/market/mxprobe)

About this listing

Kind
MCP server
Category
Sales & CRM
Pricing
Free
Sandbox
No
Hosted
No
Updated
2026-10-07
Price
Free
Get it freeVisit maker
Rating
no reviews yet
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Verification records what our published tests found on a specific version at a specific date. It is not a warranty, and it does not certify that software is free of defects.