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

• MCP of MCPs

  eliavamar

  A

  license

  -

  quality

  D

  maintenance

  A meta-server that aggregates multiple MCP servers into a single interface, reducing token usage by 98%+ through progressive tool discovery and direct code execution that processes data between tools without consuming context window space.

  Last updated 2026-04-23

  16

  10

  Apache 2.0
• 

  @microservices-sh/mcpofficial

  microservices-sh

  A

  license

  A

  quality

  B

  maintenance

  MCP server for microservices.sh that enables planning, inspecting, composing, validating, and deploying microservices modules and templates with preview deployments.

  Last updated 2026-06-18

  2

  17

  MIT

• protocols-io-mcp-server

  hqn21

  A

  license

  A

  quality

  C

  maintenance

  A Model Context Protocol (MCP) server that enables MCP clients like Claude Desktop to interact with protocols.io, a popular platform for sharing scientific protocols and methods.

  Last updated 2026-01-14

  10

  15

  MIT

• Multi-MCPs

  TaylorChen

  A

  license

  C

  quality

  D

  maintenance

  Aggregates multiple third-party APIs into unified MCP tools, providing out-of-the-box access to 10 popular services including OpenWeather, Google Maps, GitHub, Notion, Spotify, and more. Enables users to interact with weather data, search places, manage repositories, create content, and access various web services through a single MCP server.

  Last updated 2025-08-16

  34

  MIT

• Useful-mcps

  daltonnyx

  A

  license

  -

  quality

  D

  maintenance

  List of small useful mcp servers including: * docx\_replace: replace tag in word document * yt-dlp: extract chaper and subtitles base on chapter * mermaid: generate and render image using mermaidchart.com API

  Last updated 2025-07-17

  5

  MIT

• Not-Happy-Jan

  guruswami-ai

  A

  license

  -

  quality

  B

  maintenance

  Multi-sensory feedback MCP server for AI coding agents, providing audio, visual, haptic, and physical notifications with customizable characters and modes.

  Last updated 2026-06-10

  MIT

• mcp-examples

  psyll0n

  F

  license

  -

  quality

  D

  maintenance

  Provides reference implementations of MCP servers using FastAPI and FastMCP, including calculator and RSS/Atom feed parser tools.

  Last updated 2026-03-16

• Fizzy Do MCP

  ryanyogan

  A

  license

  -

  quality

  B

  maintenance

  Open-source MCP server that connects AI assistants to Fizzy (Basecamp's task management) with 70+ tools for boards, cards, workflows, and AI-powered project management.

  Last updated 2026-04-16

  25

  3

  MIT

• MCP (dot-do)

  dot-do

  A

  license

  -

  quality

  F

  maintenance

  A framework that provides search, fetch, and do primitives to enable AI agents to orchestrate complex tasks via sandboxed TypeScript code execution. It optimizes performance and security by reducing multiple sequential tool calls into a single, efficient inference round-trip.

  Last updated 2026-03-01

  22

  MIT

• OpenStack LightSpeed MCPs

  openstack-lightspeed

  A

  license

  -

  quality

  D

  maintenance

  Exposes the full openstack and oc CLIs as MCP tools with read-only by default, dynamic/static credentials, and DNS rebinding protection.

  Last updated 2026-06-11

  Apache 2.0

• MCP Examples Project

  c1r5

  F

  license

  -

  quality

  D

  maintenance

  A demonstration project that implements a Model Context Protocol (MCP) server with example tools for calendar, task management, and weather functionality in a Docker container.

  Last updated 2025-08-01

• mcp-server-do

  irvinebroque

  F

  license

  -

  quality

  F

  maintenance

  Implements an MCP server using Cloudflare Durable Objects with SSE transport, enabling remote MCP client connections.

  Last updated 2026-01-21

  1

• of-mcp

  ThiTheGoat

  A

  license

  A

  quality

  C

  maintenance

  Provides MCP tools to search, retrieve, and answer questions from the public Open Finance Brasil Confluence documentation using BM25-based local indexing.

  Last updated 2026-05-16

  4

  MIT
• 

  Swap APIofficial

  Swap-API

  A

  license

  -

  quality

  C

  maintenance

  Free DEX aggregator API that returns executable swap calldata across 46 EVM chains. No API key required. Single GET request returns ready-to-sign transactions for any token pair.

  Last updated 2026-04-03

  22

  MIT

• Agent Communication MCP Server

  mkXultra

  A

  license

  -

  quality

  C

  maintenance

  Enables AI agents to communicate with each other through Slack-like room-based channels with messaging, mentions, presence management, and long-polling for real-time collaboration.

  Last updated 2025-12-25

  42

  4

  MIT

• realtimex-cli-mcps

  therealtimex

  -

  license

  -

  quality

  -

  maintenance

  Enables running arbitrary CLI tools as MCP server tools, configured via environment variables.

  Last updated 2025-10-23

  1

• Chain of Draft Thinking

  bsmi021

  A

  license

  A

  quality

  D

  maintenance

  Chain of Draft Server is a powerful AI-driven tool that helps developers make better decisions through systematic, iterative refinement of thoughts and designs. It integrates seamlessly with popular AI agents and provides a structured approach to reasoning, API design, architecture decisions, code r

  Last updated 2025-03-26

  1

  54

  24

  MIT

• proof-of-commitment

  piiiico

  F

  license

  A

  quality

  B

  maintenance

  Supply chain risk scoring for npm, PyPI, and GitHub repos

  Last updated 2026-06-20

  8

  5

• intelligence-api

  samrothschild23

  A

  license

  A

  quality

  B

  maintenance

  MCP server that wraps Shopify, Amazon, and Google Maps intelligence tools. AI agents pay autonomously in USDC on Base via x402 — no API keys or accounts needed.

  Last updated 2026-04-03

  6

  1

  MIT

• Atom of Thoughts

  dioptx

  A

  license

  A

  quality

  C

  maintenance

  Structured reasoning MCP server that decomposes problems into atomic steps (premise, reasoning, hypothesis, verification, conclusion) with confidence scoring, live visualization, and approval feedback.

  Last updated 2026-04-28

  3

  60

  MIT