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

AideAOAuth via extension

app.aide

AI customer service: set up an AI support agent, search knowledge, look up orders, answer customers.

Read and manage fnlowl widgets, leads, email sequences and analytics from an AI assistant.

AI video upscaler: enhance videos to 1080p, 2K or 4K and track upscaling tasks.

Track partnership work, log mission hours, and see what needs your approval on 1lev1.com.

Lexpad – Vocabulary Notebook & FlashcardsAOAuth via extension

app.lexpad

Lexpad is a vocabulary notebook and flashcard app with spaced repetition (Leitner boxes) for learning words in 81 languages, including English, Spanish, French, German, Arabic, Turkish and Persian. Connect it to ChatGPT, Claude or any MCP client, and your assistant works with the words you collected yourself: • Save words and phrases you ask for, with meanings, example sentences and a level (A1–C2). • Find anything: browse and filter your whole notebook by due, new, struggling, starred or mastered words, level, topic or date added. • Practise: get quizzed on today's due words. Every answer counts as real review, moves the word through the Leitner boxes and keeps your streak. • Edit: fix spellings, change or reorder meanings, star or retire words. Deleting needs its own permission, and the assistant asks first. Lexpad never invents vocabulary: it only works with the words you add, by hand, from a text, or imported from Anki or a Kindle. Sign-in is OAuth on a Lexpad page; your password is never shared, and you can disconnect at any time. Works alongside the Lexpad web app and Android app. Guide and example prompts: https://lexpad.app/features/assistants

Your prompt library in any MCP client: list, fetch, save and version prompt templates.

AI webmaster and marketer for small businesses: website updates via GitHub PRs and WordPress drafts, SEO audits, Search Console and Analytics, Google Business Profile, Shopify, and Meta/Google/LinkedIn/X ads, with human approval on every change. Website: https://ottowebmaster.com/mcp. By IslaIntel LLC, contact julius@islaintel.com.

Directable 3D character animation for AI agents: prompt + floor marks, paths, poses → FBX. Character motion that hits the mark. Magic Motion turns a text prompt into usable full-body 3D character animation. Direct the shot with floor marks, root paths and pose keys, check the constraints for free, then play the result or download the FBX for Unreal, Unity, Blender or Maya. Agents sign in with OAuth, so there is no API key to paste. Website: https://www.magicmotion.ai Docs: https://www.magicmotio

Spacebring MCP server. Look up members, bookings, invoices, subscriptions, events and more from MCP-compatible AI assistants that support remote servers with OAuth.

crispyOAuth via extension

sh.crispy

Full LinkedIn access for AI agents: leads, messaging, and campaigns with activity limits built in.

TradeOS MCP: ticker search, My Agent, chart TA, macro news. npm stdio or HTTP.

Insider, Congress, 13F and federal contract filings for US stocks, each linked to its source.

Empresas do Brasil (CNPJ) e CRM da Oportunidados: busca, ficha completa, conta e funil.

Threat modeling, code, API & cloud security, shadow-AI & compliance governance.

Nimble MCPOAuth via extension

com.nimbleway.mcp

The Nimble MCP Server gives AI agents the ability to search, extract, map, crawl, and structure data from any website in real time. It exposes Nimble’s full web data platform as MCP tools that any compatible AI client can use.

CortexBOAuth via extension

io.cortex.mcp

The Cortex MCP server provides read-only access to real-time engineering context from the Cortex developer portal, allowing AI coding assistants to answer natural language questions about your organization's catalog (microservices, libraries, domains, teams, infrastructure), scorecards (engineering standards and best practices), initiatives (goals and deadlines), and Engineering Intelligence metrics. It includes tools for querying documentation, tracking personal entities, and accessing AI-assisted insights across the entire Cortex ecosystem.

Schedule and publish posts to 10 social platforms (X, Instagram, TikTok, YouTube, Facebook, LinkedIn, Pinterest, Bluesky, Threads, Google Business) from one account, with scheduling, media upload, per-platform overrides, and post analytics.

Send and receive faxes from any MCP-compatible AI assistant using the Fax.Plus API

Live AU/NZ bank (CDR) and brokerage data for AI agents, plus management of Redbark syncs and rules

Riel de pago contra entrega (COD) para LATAM: crea órdenes y cobra con Dropi vía MCP.