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Best MCP Servers for Communication & Messaging
Messaging and transactional-email MCP servers that let agents read and send across Telegram, LINE, WhatsApp, Discord, Postmark, Mailgun, and IMAP/SMTP inboxes. Send capability plus inbox access is a powerful exfiltration combo, so each is graded on data-handling and abuse controls. Ordered by CheckMCP audit score.
9 servers, ranked by independent MCP Score. Click any to see its full security & quality audit.
| 01 | line-bot-mcp-server line/line-bot-mcp-server | ◆ repo★ 770 | 91A |
| 02 | postmark-mcp ActiveCampaign/postmark-mcp | ◆ repo★ 54 | 90A |
| 03 | mailtrap-mcp railsware/mailtrap-mcp | ◆ repo★ 64 | 86B |
| 04 | telegram-mcp chaindead/telegram-mcp | ◆ repo★ 343 | 85B |
| 05 | mailgun-mcp-server mailgun/mailgun-mcp-server | ◆ repo★ 58 | 83B |
| 06 | email-mcp codefuturist/email-mcp | ◆ repo★ 100 | 78C |
| 07 | mcp twilio-labs/mcp | ◆ repo★ 109 | 67D |
| 08 | whatsapp-mcp Candombe/whatsapp-mcp | ◆ repo★ 1 | 34F |
| 09 | discordmcp v-3/discordmcp | ◆ repo★ 226 | 24F |
Best MCP Servers for Communication & Messaging — FAQ
What is the best MCP server for communication & messaging?+
By CheckMCP's audit, line-bot-mcp-server ranks highest in "Best MCP Servers for Communication & Messaging" with an MCP Score of 91/100 (grade A). This page ranks 9 audited MCP servers by their vendor-neutral CheckMCP score (security, tool design, reliability, context-cost). Re-audit any of them at checkmcp.dev.
How are these MCP servers ranked?+
Every server on this page is independently audited by CheckMCP and scored 0–100 across weighted pillars — for live endpoints: security (OWASP MCP Top 10), tool design, schemas, reliability and context-cost; for repos: maintenance, license, adoption and documentation. Ordering reflects the audit (popularity lists are ordered by GitHub stars instead) — no vendor pays for placement.
Which of these MCP servers are abandoned or failing?+
3 of the 9 servers audited on this page carry a failing grade (D or F) — discordmcp scores lowest at 24/100 (grade F). CheckMCP re-audits continuously, so a server that stops shipping fixes, loses its license or gets archived drops here on its own. Open any listing for the per-pillar breakdown behind its grade.
Are these MCP servers safe to use?+
Each listing links to a full CheckMCP report showing its grade, per-pillar breakdown and any security findings (tool poisoning, hardcoded secrets, the lethal trifecta). Grade A/B servers passed with no or only minor issues; check the individual report before connecting any server to sensitive data or tools.