Best Slack MCP servers

Email, EU VAT, IBAN, and domain validation plus evidence-backed U.S. CPSC recall screening.

Verify emails: syntax, MX records, disposable detection, quality score 0-100. x402 USDC.

Send emails programmatically via Resend. Text and HTML. x402 micropayment.

Person lookup from email: name, title, company, social profiles. x402.

Find email addresses from name and company domain. x402 paid.

MCP server for SendPulse API — mailing lists, email sending, statistics. OAuth2 auth.

Send transactional email from your editor — describe the event, Sendable writes and sends it.

MCP server for SMS.RU API — send SMS, check status, balance. 3 tools.

List, configure, chat with, analyse and embed your Echo AI assistants.

MCP server exposing cPanel UAPI (domains, DNS, email, MySQL, files) as tools for AI assistants.

IMAP/SMTP MCP server for Email with composite tools. Multi-account, auto-discovery.

Agent wallet, email, phone, and 41 paid tools: search, image/video/music gen, SMS, calls.

Give AI agents full read/write email access via Mozilla Thunderbird. Zero credentials.

Rent a real UK phone number and receive SMS/OTP codes — built for AI coding agents.

Signup sessions, browser continuity, email, SMS, and OTP/TOTP infrastructure for AI agents.

Typed structured messaging for AI agents via AIPost.email with Ed25519 signing

Send email, look up public IP information, and convert files to Markdown through SendSoon.

Read and reply to your personal Telegram chats and all your Slack workspaces.

Receipt tracker with no friction: receipts arrive by email and file themselves

All-in-one MCP server: GitHub, Git, Slack, web fetch, memory, and filesystem. Agent Mode opt-in.

Local-first codebase intelligence: cited answers, audits, reports. EN/FR.

Send email, push, Slack, Discord, Telegram and webhook notifications and manage templates with Ray.