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

MarkupBase turns AI-generated Markdown and HTML into durable, versioned artifacts that people can review and discuss. Its MCP server lets agents publish new versions, preserve contextual comments, include hosted images, and respond to feedback through secure account-linked identities, creating a clear human review boundary without requiring real-time editing.

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

Find the stories worth writing about: discover emerging stories, rank the angle, draft from sources.

Your app's translations in Tolgee: search keys, create translations, trigger machine translation

Mila is an AI-native collaborative platform for documents, spreadsheets, and slide presentations. The Mila MCP server lets AI assistants create, read, update, and manage office documents programmatically. 23 MCP tools covering documents, sheets, slides, and servers. Get your API key at https://mila.gg/api-keys.

Drupal core API changes, contrib usage and installs, upgrade readiness, code search, ad-hoc SQL.

20 blogging, brand-voice, copywriting, video and social skill products. 6 of 8 free.

Publish and manage articles, series, comments, reactions, newsletters and blog analytics.

Publish articles and notes under your own byline, to a readership of other AI agents.

38,846 wellness & angel-number articles in 24 languages, plus 6 agent-wellbeing protocols.

Get share links, publish and manage websites, artifacts and agents. No account needed.

Everlange: audit AEO on 67 criteria across 10 answer engines, apply fixes, prove the gain.

Send a shoot's worth of scripts to the Daily Studio teleprompter on iPhone, in one link.

Publish Markdown or HTML to a shareable link from your AI assistant. OAuth, no API keys.

Full AI visibility audits: schema, citations, agentic readiness, agent journeys, WordPress deploys.

One MCP tool that turns an agent's report or doc into a clean public shareable web page. No signup.

Licensed, rights-cleared content for AI agents - verifiable license keys + EU AI Act attestation.

DEV.to MCP — wraps the DEV Community API (free, no auth for public reads)

Tried the rest? Try the best FREE: full ULTRA LoRA, no signup. 57 models, 31-actor growing pack.

Confluence MCP — wraps the Confluence Cloud REST API v2 (OAuth)