CheckMX
Verify emails and review cold email campaigns, mailboxes, replies and deliverability in CheckMX.
What it does
CheckMX is an MCP server, a connector that lets an AI assistant use it as a tool. It is hosted: an assistant connects to it over the internet, nothing to install.
From the publisher's description, Electra Index matched it to 2 capabilities: email automation and outreach sequencing. That makes it a candidate for tasks such as send personalized outreach or run email marketing campaigns.
Facts come from the Official MCP Registry, as declared by the publisher. Capabilities are matched automatically (low confidence). None of this is a test of the tool.
At a glance
How to connect
As declared in the Official MCP Registry · not tested by Electra IndexHosted endpoint
https://checkmx.dev/mcpstreamable-http
In Claude Code: claude mcp add --transport http checkmx https://checkmx.dev/mcp
MCP settings (Claude Desktop, Cursor and other MCP clients)
{
"mcpServers": {
"checkmx": {
"url": "https://checkmx.dev/mcp"
}
}
}Tasks it helps with
Share of each task's required capabilities it covers| Send personalized outreach Email Automation · Outreach Sequencing | 67% |
| Run email marketing campaigns Email Automation | 50% |
| Draft emails Email Automation | 50% |
| Book sales meetings Email Automation | 50% |
| Follow up on quotes Email Automation | 50% |
| Manage my inbox Email Automation | 50% |
| Run satisfaction surveys Email Automation | 50% |
| Send and chase invoices Email Automation | 50% |
Similar tools
Listed for the same task: send personalized outreach- SendbloxREMOTELOCALAI outreach + email sending connected to your CRM. Requires a paid Sendblox account
- ReachkitREMOTELOCALFind B2B leads with verified emails, write sequences, and launch and track cold email campaigns
- PreceptREMOTELOCALB2B lead and company intelligence: search leads, enrich contacts, and queue outreach
- OutreachPilot: Polish B2B leads & cold emailREMOTELOCALFind Polish companies (CEIDG, KRS, Google Maps), verify emails and run cold email campaigns from AI
- AI spreadsheet with live enrichment columns — emails, mobiles, firmographics
- Instalent MCPREMOTELOCALRecruiting tools for candidate sourcing, enrichment, ATS workflows, campaigns, and outreach
Ready-made AI agents
- $49/mo · free plan · Prices & score →
- $59/mo · Prices & score →
- Unify77$20/mo · free plan · Prices & score →
- On quote · Prices & score →
Facts & evidence
Each fact shows where it was seen and when.| Fact | Value | Evidence | Source | Last confirmed |
|---|---|---|---|---|
| Hosted endpoint | https://checkmx.dev/mcp | DECLARED | SRC-001 Official MCP Registry | 1m ago |
| Local install (package) | no | DECLARED | SRC-001 Official MCP Registry | 1m ago |
| Remote access (hosted) | yes | DECLARED | SRC-001 Official MCP Registry | 1m ago |
| Website | https://checkmx.dev | DECLARED | SRC-001 Official MCP Registry | 1m ago |
| Registry status | active | DECLARED | SRC-001 Official MCP Registry | 1m ago |
| Version | 0.1.0 | DECLARED | SRC-001 Official MCP Registry | 1m ago |
| MCP server | yes | DECLARED | SRC-001 Official MCP Registry | 1m ago |
Change history
- NEW31 Oct 2026first seen in the index
Is this page accurate?
Flag it and our robot re-checks the official source. Reports never change a score.Is CheckMX still online?
Free alerts · no accountDo you run CheckMX? Know when it stops answering
For publishers · optionalIts hosted endpoint can be monitored. Monitoring Pro connects every 30 minutes like an AI assistant, emails you within the hour when it stops answering, keeps a 90-day availability history and adds your answer rate to your badge.
Monitoring never changes a score or a rank.
Are you the publisher of CheckMX?
Free · show your listingAn independent listing builds trust with your buyers. Announce it, and add the badge to your website or README.
<a href="https://electraindex.com/mcp/checkmx?utm_source=badge&utm_medium=share&utm_campaign=listing"><img src="https://electraindex.com/api/badge/checkmx" alt="Listed on Electra Index"></a>Questions about CheckMX
How do I connect CheckMX?
Use the hosted endpoint https://checkmx.dev/mcp in your assistant's MCP settings. The exact settings are in "How to connect" above, as declared in the Official MCP Registry.
What can I use CheckMX for?
Based on its description, it is most relevant to: send personalized outreach, run email marketing campaigns, draft emails, book sales meetings.