"Proton Mail" matching MCP servers:

MCP server that exposes meetergo's scheduling and CRM API as tools for AI assistants, enabling Proton Calendar-backed booking management and contact operations without Google Workspace.

Enables finding and verifying work emails for contacts through a waterfall of provider keys, with per-provider cost attribution and verification after each finder.

Enables users to manage Pipedrive CRM data including deals, contacts, and activities directly through an AI assistant. It supports full CRUD operations, email engagement analysis, and mapping of custom field metadata for comprehensive pipeline management.

A complete MCP server over the Bitrix24 REST API, enabling CRM, tasks, chats, files, calendar, HR, smart processes, mail, telephony, business processes, and events through 30 tools and ~290 actions. Supports incoming webhook or OAuth 2.0 authentication and works over stdio or Streamable HTTP.

Real-time email verification API with syntax, MX, disposable detection, role-based flags, quality score 0-100. Built for agent outreach pipelines with pay-per-call via x402 (USDC on Base L2) -- no API key, no signup, no rate-limit wall.

Validates email deliverability, assesses domain credibility, and scores B2B leads from A-F to help prioritize outreach, with batch processing and a free tier.

Find professional email addresses from name + company domain. Tests 15+ patterns against MX records with confidence scoring, with pay-per-call via x402.

Enables Claude Code to create HubSpot marketing email drafts from Markdown and Word documents with automatic image handling and brand guidelines.

Enables MCP clients to send natural-language requests to deployed Zoho Zia agents, currently the Senior Projects Manager agent, which can read and write Zoho Projects, Mail, CRM, and WorkDrive data through its trigger API.