"An email protocol for sending and receiving messages" matching MCP servers:

atdata-email-verification-mcp-server

Enables checking email addresses through the Email Social Media Checker API to verify and validate email information.

Generate hyper-personalized cold email sequences per lead via AI. List campaigns, generate emails for individual leads or batches, and export results as CSV or JSON.

Enables Claude Desktop to answer natural-language questions about customers by exposing search, profile, order history, status filter, and spend statistics tools backed by local mock data, with a single-file swap path to Oracle AI Agent Studio later.

MCP server for managing on-chain loyalty programs on Base L2. Mint tokens, manage rewards, track balances, tiers and marketplace offers via standard MCP protocol.

Enables AI agents to interact with Salesforce CRM data by executing SOQL queries and managing records. It provides tools for object metadata discovery and record operations, specifically optimized for Heroku deployment.

Production-ready MCP server enabling AI assistants to interact with Braze's customer engagement platform, offering 92 tools for user management, messaging, campaigns, analytics, email/SMS, catalogs, and SCIM provisioning.

Enables secure access to customer e-commerce data (orders, loyalty points, offers, preferences) through the Shopper Context Protocol with OAuth 2.0 authentication. Supports discovering and connecting to SCP-enabled merchants for personalized shopping assistance.

Unified MCP server combining Hunter.io email finding with Apollo company intelligence for B2B lead enrichment.

Enables AI assistants to enrich contacts and build audiences via the YourICP API. Provides tools to set an API token, submit contact lookups by email or LinkedIn URL, and poll for enrichment results.

Enables AI agents to verify email addresses, clean lists, run bulk verification jobs, and manage a Verifly account through natural language, without writing HTTP calls.

An MCP server implementation that integrates Claude with Salesforce, enabling natural language interactions with Salesforce data and metadata for querying, modifying, and managing objects and records.

LeadFuze MCP Server for contact/company enrichment from email or LinkedIn URL plus email validation. Hosted MCP endpoint: https://mcp.leadfuze.com/mcp (API key required).

An MCP server implementation that integrates Claude with Salesforce, enabling natural language interactions with Salesforce data and metadata.

MCP server that lets you talk to your GoHighLevel sub-account in plain English, offering six tools to search contacts, list calendars, check free slots, and book appointments with dry-run safety and explicit error messages.

Full email marketing platform for AI assistants — 32 MCP tools for campaigns, contacts, automations, A/B testing, AI content, multi-channel messaging, deliverability monitoring, and analytics.

Explorium AgentSource MCP Server empowers every agent to become an AI-driven, Go-To-Market specialized agent! With over 20 specialized endpoints designed for prospecting, sales, and lead generation, agents can effortlessly generate and enrich accounts and prospects, access deep business insights, an

An agent-optimized MCP server for Kit.com (formerly ConvertKit) that enables full management of email marketing campaigns, subscribers, and broadcasts. It provides 13 composite tools covering the entire Kit V4 API with built-in rate limiting and formatted responses for efficient AI interaction.

An MCP server that provides knowledge about Coordinate Reference Systems (CRS).

An MCP server that provides an interface to the Copper CRM API for managing contacts, companies, activities, and opportunities. It enables users to search for people, log meetings or notes, and track sales deals directly through MCP-compatible clients.