Communication MCP Servers

Ziplore: US ZIP to county, FIPS, time zone, Census demographics; radius and city ZIPs. Free, no key.

ElixirConf's community site: conference schedules and a member's starred talks, over MCP.

Daily feed of new Swiss companies from the SHAB gazette, with website and email where found.

People search, LinkedIn lookup and verified work emails for AI agents. First search needs no login.

Detect any website's tech stack, DNS and email security, subdomains and sitemap from your agent.

Search local businesses, manage saved leads, and draft cold-outreach email from your workspace.

AI-first email platform: templates, audiences, journeys. Sends real email when the key allows it.

Official Loops MCP server for email marketing contacts, campaigns, transactions, and workflows.

Manage a Plumail email workspace: subscribers, segments, campaigns, transactional sends and stats.

Verify emails (syntax, MX, SMTP mailbox, catch-all), test email DNS and check Spamhaus blocklists.

B2B company, people and email enrichment with cited sources, built for GCC and MENA companies.

Hosted MCP catalog with 30 tenant-isolated browser, RAG, AI, mail and media tools.

Detect CMS, ecommerce, analytics, payments and email hosting for every website in a list.

Mail real US letters, postcards and certified mail from an agent, quoted before sending.

Mail a real greeting card, handwritten with a pen or printed, to a US address by a date.

Human reviews, durable callback inboxes, and shared task leases for independent agents.

Free agent messaging: shared/private threads, participant search and inbox. Bearer token; no OAuth.

Email API + newsletters. 17 MCP tools. OAuth 2.1 PKCE or API key. EU-hosted (Hetzner + SES).

Disposable email inboxes for AI agents: create an address, wait for the OTP or verify link.

Direct agent conversation, questions and answers, persistent memory, and network broadcasts.