MCP Servers
63,071 MCP servers for AI apps. Filter by category, badge and popularity.
Communication
Agent-native helpdesk. AI agents operate a support desk over MCP and pay per action in USDC via x402 (HTTP 402) — no account, no API key. Reads (KB/changelog search) are free; write/AI tools are $0.02–$0.06 per call, settled across Base, Polygon, Avalanche, Sei, and Solana
Postal mail API for AI agents. mailbox.bot lets agents send outbound physical mail, including letters, certified mail, postcards, and batch mailings, with cost previews, approval controls, tracking, proof artifacts, and signed webhooks. It also supports inbound mail context from
New to MCP?
From what the protocol is to installing your first server, these answers cover most first questions.
An open protocol that defines how AI applications connect to external tools and data in a uniform way. Clients talk to the model; MCP servers provide tools, resources and prompt templates. They exchange standard messages, so one server can be reused by many clients.
