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Lets agents read, search, organize and send email over IMAP/SMTP with any provider that supports them, across multiple accounts, with a local web UI for setup. Needs your email password or app password.

Offline translation sync for coding agents: hands only new strings in JSON, YAML, PO, CSV and other locale files to the agent for translation and never overwrites human-edited translations, saving tokens. Needs Node.js; calls no translation API itself.

Railway's official plugin, bundling the use-railway skill and hosted Railway MCP so agents can create projects, deploy services, set environment variables and databases, and check logs and metrics to debug deployments. Needs a Railway account.

QuantConnect's official CLI drives the open-source LEAN engine locally or in the cloud to download data, backtest and optimize quant strategies and deploy them live. Requires a paid-tier QuantConnect organization; strategies in Python or C#; local runs need Docker. Get expert review.

Vercel's official plugin: a knowledge graph of the Vercel ecosystem, dozens of skills, expert subagents for deployment and performance, and commands for deploys, env vars and project status, covering Next.js, the AI SDK, storage and CI/CD. Needs Node.js 18+ and Bun; telemetry is opt-out.

ComfyUI's official MCP: lets agents drive local ComfyUI image and video workflows, list installed nodes, models and templates, submit jobs and fetch results, and start or stop ComfyUI. Needs a machine that can run ComfyUI (usually a GPU) and comfy-cli; partner models consume Comfy credits.

Crowdin's official CLI: push source files and pull translations back in place, track progress, manage glossaries and TM, and run machine or AI pre-translation, with JSON output for agents. Needs a Crowdin account (free trial; free for open source) and a token; crowdin init sets up config.

Cross-platform UI automation skills built on Midscene.js visual recognition: control browsers, desktops, Android, iOS and HarmonyOS devices in natural language, and set up Vitest + Midscene E2E tests. Bring your own vision model API key; maintained by the Midscene team.

Hugging Face's official MCP server: lets agents search models, datasets and Spaces on the Hub and call thousands of Gradio AI apps directly. Hosted remotely; sign in with your Hugging Face account or authorize with a token.

Query and manage Microsoft 365 and Azure tenants in natural language via Microsoft Graph: create users and security groups, check devices and Conditional Access policies and view cloud costs. Needs a work account with the right permissions; changes apply immediately.

Lets agents create, update and resolve incidents in ServiceNow, manage the service catalog, change requests and knowledge articles, and load only the tools each role needs. Needs a ServiceNow account and Python 3.11+ (from source); community-maintained, last updated Oct 2025.

Grafana Labs' official skills: dashboards and alerting, PromQL, Loki, Tempo, Mimir and Pyroscope queries, Prometheus cardinality troubleshooting, Grafana Cloud management and cost optimization, k6 load testing and plugin development. Some skills need Grafana Cloud.

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.

Puts Claude in your incident channel: builds triage runbooks from past incidents, investigates alerts read-only and gives an evidence-backed first diagnosis while humans decide fixes, plus handoffs and status reports. Anthropic reference code, no longer maintained; needs Claude Team or Enterprise.

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.

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.

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.

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.

Official Alibaba Cloud MCP: query logs, metrics and traces from SLS, CloudMonitor and ARMS, with time-series comparison and natural-language-to-SQL. Needs an AccessKey; some AI tools are billed per call. The install uses the Python version (main branch is now a Go binary).

Community-run local Salesforce MCP: query, summarize and update accounts, opportunities and cases in plain language and search across objects; admins can also create custom objects and fields and edit Apex. Needs Salesforce login and security token (or a Connected App) and Node.js 22+.

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.

Official Spark mail skills: agents read mail, calendar, contacts and teams, with flows for morning briefs, inbox zero, meeting prep, follow-ups and weekly reports. Needs Spark desktop on macOS or Windows with the CLI enabled; set read-only, organize or send access per account.