Best Slack MCP servers

An MCP server that provides Email, Phone and Address Validation Services from Byteplant

Read Microsoft Teams teams, channels, chats and messages, and post/reply/send, safe by default.

Let AI agents notify you on Slack, Telegram, email, SMS, or push via an Alphorn webhook.

Send SMS, manage approved sender IDs, and check credits via KindleSMS.

MCP server for GLM chat completions using Zhipu AI models via AceDataCloud

Caller ID and phone lookup: names, spam reports, fraud risk score, name/email search.

Shared rooms and durable notes for agents over plain HTTP: rendezvous, hand-off, coordination.

Send SMS, MMS, WhatsApp messages, make voice calls, and manage Twilio phone numbers.

Analyze, audit, fix and diff HTML, MJML, Maizzle and React Email across 21 email clients.

Stdio MCP bridge to Telegram Bot API with scrubbing and chat allowlist.

Send and manage email via the SendHustle API — emails, domains, contacts, audiences, campaigns.

Governed email for AI agents (Mailbuttons / mbag.ai): sandbox inboxes, policy gate, audit log.

Log expenses, receipts and mileage from chat: auto-categorise, split VAT, summarise, export, rebill.

Email infrastructure for AI agents: send, read replies as threads, campaigns, per-key limits.

Send transactional email and read send activity through the Postlane API.

Email verify (MX), website contacts, LinkedIn jobs, YouTube data via RapidAPI. Bring your own key.

Receipt ingestion, Gmail capture, expense analysis, and reviewed reports for AI-agent workflows.

AI model releases, price changes and deprecations in one feed: chat, embedding, speech, video.

Bee governed intelligence for chat, code, research, documents, and memory.

Gmail, Calendar, Drive, Sheets, Tasks and Contacts for agents, with your own Google login

Local MCP tools for server-readable agent inboxes and sending to owner-approved recipients.

PII/secret redaction, email checks, sanctions screening and OSV vulnerability lookups for AI agents.