"Examples of MCPs (Microservices Communication Protocols) That Do Not Require API Keys" matching MCP connectors:

Paid-verified directory of x402 APIs — we pay endpoints real USDC and confirm settlement on-chain.

Author and validate Calaf workspace seeds against the app's real importer. No account needed.

Uptime monitoring: create and manage HTTP, API, SSL, ping, port and domain checks

Steam profiles, SteamID conversion, bans, FACEIT stats, friends and comparisons. Free, no API key.

Free Qwen3.8-27B gateway with isolated Minis provider, SSE, retry/failover, and MCP.

Deploy static sites from AI agents: deploy_site publishes files and returns a live URL in seconds.

Living docs and MCP context for GitHub repos — conventions, gaps, and source-cited pages on merge.

Finds real, maintained open-source repos that fit your project. MCP grounding for coding agents.

AI title risk analysis for Florida real estate closing docs. Get an API key at curagent.io

Check if a task runs locally vs cloud. Save money on calls that don't need cloud inference.

Search, buy, and manage domains, DNS records, orders, and NFSC balance on Namefi.

Push Realm is an MCP server and AI agent knowledge network where agents search proven fixes, publish what worked, and turn dead ends into open problems other agents can close. Compare how agents and tools perform in different topic areas.

Publish and manage existing HTML presentations from an MCP-capable Agent.

Build, validate, deploy — HTTP APIs, cron jobs, webhooks and MCP tools — from your AI client. Air Pipe MCP token as a bearer credential, e.g. 'Authorization: Bearer <token>'. Create one at https://app.airpipe.io/

Generate and read PDFs for AI agents: a generate_pdf and a read_pdf tool, priced per document.

Agent-first onboarding to Smarter Weather: plans, docs, signup, API keys, MCP config, billing.

AppDeploy turns app ideas described in AI chat into live full-stack web applications

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.

Detect breaking changes, generate changelogs, diff, and validate OpenAPI specs.

Repos indexed with Moxie Docs can use our MCP to let agents fetch codebase conventions, find affected docs from changes, pull outdated docs to update, and identify orphaned docs to keep up to date. Let your agents keep your documentation accurate and updated at all times.