Tools

The Dart team's official MCP server (dart mcp-server): analyze project errors, search pub.dev and manage dependencies, connect to running Flutter apps for hot reload, and read runtime errors and the widget tree. Needs Dart 3.9+; still experimental.

Alibaba Cloud's official agent skills: ECS diagnosis and DR, RDS/PolarDB database checks, PAI training and EAS deployment, ACK clusters, RAM permissions, OSS and network troubleshooting, and Model Studio. Needs an AccessKey or aliyun CLI credentials.

Firecrawl's official plugin: brings the Firecrawl CLI in as skills so Claude Code can search the web, scrape pages to Markdown, map site links or crawl whole sites. Install firecrawl-cli and set an API key first; self-hosting supported.

Renders a screen reader spec for a component directly in Figma: focus order plus per-state VoiceOver (iOS), TalkBack (Android) and ARIA (Web) property tables and announcements. Part of uSpec; reads the component .md spec from create-component-md and needs a Figma MCP and a configured template key.

Stape's Google Tag Manager MCP: lets agents view, create and edit tags, triggers and variables in GTM containers, for tracking and conversion setup. Hosted version (routes data via Stape's servers) needs just Google sign-in on first use; or run locally with a service account key.

Searches Taiwan's court judgments, national laws database and Constitutional Court interpretations, with full texts, amendment history and citation links. Public government sources only, no account; needs Python and pipx. Unofficial: have a lawyer check results against official texts.

MinerU's official MCP: parses PDF, Word, PowerPoint and images into Markdown via the mineru.net cloud API, keeping tables and formulas. The keyless Flash mode works out of the box; add a token for higher quotas and more formats.

Official Alpha Vantage MCP: exposes its API as tools for stock and options quotes, fundamentals, news sentiment, forex, crypto, commodities, economic indicators and dozens of technical indicators. Needs a free API key; a remote OAuth server is also available.

Comet's official Opik MCP: query traces and spans of LLM apps in chat, log scores and comments, and manage datasets, experiments and prompt versions. Works with Opik Cloud (API key or browser sign-in) and self-hosted open-source Opik.

16 official Firecrawl skills that turn web scraping into deliverables: competitor pricing and feature tracking, market and industry reports, pre-meeting account research, lead lists, SEO audits and literature reviews. Needs a Firecrawl API key plus its CLI or MCP.

Implements, debugs or audits how a website behaves on iPhone and iPad in Safari or added to the Home Screen, and on Mac when added to the Dock: safe areas, status and address bar tinting, theme color, overlays, keyboard, manifest, icons, splash screens and installed navigation.

Pulls Yahoo Finance data for free via yfinance: company profiles, financials, analyst estimates, news, option chains, fund holdings and sector rankings, plus candlestick charts. No API key, just uv. Data may be delayed; have investment conclusions reviewed by a professional.

Posit's official R package connecting R to Claude Code and other agents: register your own R functions as tools and run them in your open R session, using its data. Out of the box it only switches sessions; add the btw package for docs lookup and data inspection tools. Requires R.

Wraps Shapely, GeoPandas, PyProj, Rasterio, PySAL and other GIS libraries so agents can run geometry and overlay analysis, reproject coordinates, process rasters (e.g. NDVI), do spatial statistics and make maps, and fetch boundaries, land cover and satellite imagery. Needs Python 3.10+ and uv.

Microsoft Translator's translation quality tool: GPT scores each sentence using MQM error categories or a direct score; --list_mqm_errors shows error types and severity. Needs line-aligned source and target files, Python and an OpenAI or Azure OpenAI key (paid); a translator should still review.

Searches ZIM-format knowledge bases such as Wikipedia, Wiktionary and Stack Exchange offline: full-text search, read articles by section and follow links, even with no internet. Download .zim files from Kiwix first (hundreds of MB to tens of GB) into ~/zim-files, and install uv.

Gives agents 250+ Financial Modeling Prep endpoints: financials, valuation and technical indicators, insider and congressional trades, SEC filings and earnings calendars. Needs an FMP API key (free tier); connect to the author's hosted URL or run locally on Node.js 25.3+. Results need expert review.

Octagon AI's official research MCP: ask in plain language about SEC filings, earnings calls, financial metrics, stock and crypto prices and news; also prediction-market reports and a deep research agent. Needs a free API key and Node.js. Not investment advice; verify findings.

Official VideoDB skills: agents ingest video from local files, URLs, YouTube or live streams, then transcribe, index, search clips by content, generate subtitles, edit and dub, returning playable links. Needs Python 3.9+ and a VideoDB API key (free credits on sign-up).

Official BibiGPT skill: hand agents YouTube, Bilibili, podcast or local audio and video to get summaries, timestamped transcripts, chapter notes and mind maps. Needs a BibiGPT account (free tier has daily limits) plus its desktop app (with the bibi CLI) or an API key.

Microsoft's official MCP: query Clarity traffic, behavior metrics and session recordings in plain language, filtered by device, browser, country and more, to dig into landing page conversion. Needs Clarity installed on your site, a data export API token and Node.js.

Connects any FHIR-compliant EHR server (e.g. the Epic sandbox or HAPI) to agents to search, read, create and update patient clinical data in plain language, with SMART on FHIR auth. By WSO2. Needs a FHIR server URL, access token and uv; clinicians must review results.

Connects to the St. Louis Fed's FRED database: search and pull 800,000+ macroeconomic time series (GDP, unemployment, inflation, interest rates) with built-in year-over-year and period-over-period changes. For macro research, investing and teaching. Needs a free FRED API key and Node.js.

Lokalise's official CLI (lokalise2) covering the Lokalise API v2: upload and download language files and manage keys, translations, screenshots, translation tasks and contributors. Needs a Lokalise account (paid, 14-day free trial) and an API token passed via --token.