"Systems or platforms that support dynamic registration" matching MCP connectors:

Botsify API MCP lets other AI tools create and run Botsify agents through the public Botsify HTTP APIs. Users sign in with the same email and password as the Botsify login endpoint, then the server keeps the Bearer token for later calls. It covers the documented Postman collection (bots, messenger users, send message, user attributes, analytics, WhatsApp templates and broadcasts, and whitelabel clients and packages) and the extra agent endpoints that are not in that collection: create agent with

Official Kudosity Model Context Protocol (MCP) server that allows AI-powered editors (like Cursor and Windsurf) and assistants (like Claude Desktop) to directly explore and execute Kudosity APIs. With MCP, your AI can search API specs, generate code snippets, and run live requests; all without leaving your development environment.

Send a one-off fax from inside ChatGPT or Claude. Pay-per-use, $2-$4.50 per delivered fax.

Read the public Sup wire over hosted MCP, or use local clients to claim, send, and verify receipts.

Text your own phone when a run finishes or needs you. A key can only message its own number.

SMS Verify: SMS Verify API is a secure and easy-to-integrate service that sends verification codes.

send-that-email MCP — wraps StupidAPIs (requires X-API-Key)

Read calls, contacts, users, teams and numbers; tag calls and create or update contacts.

Remote MCP server for CODENIVERSE, a Thai software agency. Look up services, company profile, and articles on AI agents and automation, or send a contact request straight to the team. Five tools, no auth required.

Free live chat and AI support agent. Auto-create a workspace and embed from your AI editor.

Send real faxes to EU institutions: pay per fax via checkout link or prepaid API key.

An MCP connector that lets AI agents ask you questions, request permission approvals, and send alerts as push notifications to your phone, so you can unblock and approve your agents from anywhere.

Ephemeral REST chatrooms where AI agents of different owners coordinate on a shared task. A room is one URL — no SDK, no registration; the owner watches the conversation live in a browser. Optional LLM arbiter turns negotiations into a tamper-evident Ed25519-signed ledger.

Group meeting scheduler: Rank everyone’s available times across Google and Outlook, book Meet or Teams meetings between different organizations.

Send free or paid faxes to US/Canada from Claude, ChatGPT, and other AI agents.

Give your AI agent a phone. Place outbound calls to US businesses to ask, book, or confirm.

PhoboMail gives AI agents their own @phobomail.com email address with zero human involvement. Agents call `register_email` to get an address and API key, then use `send_email`, `read_inbox`, `wait_for_email` and more — all over MCP. Ideal for agent workflows that need to sign up for services, handle OTP verification, or communicate across sessions. Hosted on Cloudflare.

The Telnyx MCP server is an official implementation of the Model Context Protocol that enables AI clients (like Claude Desktop, Cursor, and OpenAI Agents) to interact with Telnyx's telephony, messaging, and AI assistant APIs. It provides comprehensive capabilities including making and managing phone calls, sending SMS/MMS messages, purchasing and configuring phone numbers, creating AI assistants with custom instructions, managing cloud storage buckets, scraping and embedding website content, and handling integration secrets. The server exists as both a local implementation and a remotely hosted version, allowing developers to integrate real-world communication infrastructure directly into AI applications.

AI-native form builder with a native MCP server. Describe a form in Claude, ChatGPT, or Cursor, get a live URL back, and read every response in the same thread, no dashboard.

aX is an agent-native collaboration network. A single Streamable HTTP MCP endpoint gives agents persistent identity, real-time messaging with @mentions and threads, tasks and handoffs, shared workspace context, semantic search, agent discovery, and rendered MCP App / widget artifacts that humans and agents can open and play back.