MCP Server Markup Language (MCPML)

Web content fetching and conversion for efficient LLM usage

Flag features directly from chat in your code editor, including VS Code, Cursor, Windsurf, Claude Code—any IDE with MCP support.

Repository management, file operations, and GitHub API integration

Busca oportunidades de voluntariado en España a través de hacesfalta.org. Filtra por provincia, categoría, horario, edad y más. La principal plataforma de voluntariado en España con miles de oportunidades activas.

Noise data tools for AI agents — free, no auth, no config. Estimated noise levels for 50 world cities (ranked, WHO-anchored), measured noise-exposure rankings for the 100 largest US cities (federal BTS data), decibel levels of common sounds (CDC/NIOSH-sourced), NIOSH safe-exposure-time math, and info on the Decibel Shield iOS sound meter. Typed structured output on every tool. Data CC BY 4.0 — please cite decibelshield.app. Endpoint: https://decibelshield.app/api/mcp (Streamable HTTP). Docs: https://decibelshield.app/mcp/

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 creates a room, hands the URL to agents, and watches the conversation live in a browser. Remote MCP server at https://roomcomm.ru/mcp (create_room, read_messages, send_message, get_context, verify_integrity). Optional LLM arbiter tracks negotiation threads, flags contradictions, and chains every revision into a tamper-evident Ed25519-signed ledger.

Zhipu Web Search MCP Server is a search engine specifically designed for large models. It integrates four search engines, allowing users to flexibly compare and switch between them. Building upon the web crawling and ranking capabilities of traditional search engines, it enhances intent recognition capabilities, returning results more suitable for large model processing (such as webpage titles, URLs, summaries, site names, site icons, etc.). This helps AI applications achieve "dynamic knowledge acquisition" and "precise scenario adaptation" capabilities.

A Serper MCP Server

A Model Context Protocol (MCP) server that integrates with Jina AI Search Foundation APIs.

Search and discover volunteer opportunities across Spain via hacesfalta.org. Filter by province, category, schedule, age group and more. Each result links to the sign-up page on hacesfalta.org.

Automatically create a remote browser to complete your specified tasks, developed based on Browser Use + Sandbox. 自动创建一个远程浏览器，完成你指定的任务，基于Browser Use + Sandbox开发。

A shelf for the HTML your AI coding agent writes. Push an HTML report, dashboard, or spec over MCP — htmlbook stores it, themes it for reading on any device, organizes it by project, and shares it with a link.

Marketing, growth & SEO intelligence for AI assistants — 75+ practitioner sources, judged daily, linked to source. Free.

### Deterministic Music Theory for Claude, Cursor, and Autonomous AI Agents Large Language Models (LLMs) frequently hallucinate music theory, leading to incorrect notes, false Roman numerals, and broken voice leading. **THIRI** solves this by providing a deterministic, mathematical music-theory engine (pitch-class-set theory over ℤ/12) directly to your AI. It gives AI assistants precise, reproducible harmonic reasoning in milliseconds, allowing them to write correct musical scores, analyze progressions, and generate playable arrangements. #### 🎷 Key Features: * **Chord Analysis (`analyze_chord`):** Parse any symbol (e.g., `Cmaj7/E`, `G7#11`) to retrieve root, quality, intervals, Roman numerals, and diatonic or chromatic harmonic functions. * **Note Resolution (`resolve_chord`):** Resolve chord symbols to spelled notes (enharmonically correct), frequencies (Hz), MIDI numbers, and scale recommendations. * **Voicing Engine (`generate_voicing`):** Generate instrument-ready voicings (rootless, shell, triad, pad, drop-2, drop-3) and calculate voice-leading scores for transitions. * **Reharmonization (`reharmonize`):** Substitute progressions using classic jazz techniques, including Tritone Substitution, ii-V Insertion, Modal Interchange, Coltrane Changes, and Backdoor cadences. *Ideal for developers building AI music assistants, digital audio workstation (DAW) agents, educational theory tools, and automated composition workflows.*

Turn any URL plus a schema into validated, typed JSON via the Extracto API. No CSS selectors; missing fields return null instead of guesses.

Noorle is a managed AI agent runtime with secure MCP gateways: built-in tools, custom WASM plugins, and 1,000+ connectors — auth, rate limits, and audit logs included.

Live crypto market data — price, funding rates, open interest, long/short ratio, order book and candles — across major exchanges, with built-in funding-rate arbitrage comparison.

Docsie MCP brings your documentation workflow directly into Claude. Create, edit, and publish docs without leaving your AI assistant. Convert videos into structured documentation instantly, run compliance analysis on text, audio, and video content, and use semantic search to find exactly what you need across your knowledge base. Whether you're building product docs, SOPs, or technical guides, Docsie MCP makes it faster and smarter — all powered by AI.

Safely schedule Outlook meetings on on-prem Exchange EWS with room-aware slot suggestions, local credentials, preview-confirmed writes, and audit-friendly lifecycle records.

Generate wiki docs from source code. Supports PowerShell, Python, Go, C#. Java, COBOL are coming soon.

MCP server that adds a fail-closed quality gate and hash-chained receipt ledger to any AI agent workflow.

Give teams and AI assistants a shared understanding of goals, projects, decisions, and risks.

Human-in-the-loop approvals & notifications for AI agents via WhatsApp (MCP server)

Official Firecrawl MCP Server - Adds powerful web scraping to Cursor, Claude and any other LLM clients.