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i18next's official CLI: finds hard-coded strings in JS/TS code, extracts translation keys, checks which locales are missing entries and syncs locale files; init --yes sets up non-interactively, and a bundled agent skill guides app internationalization. Needs a Node.js project using i18next.

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.

Nulab's official Backlog MCP: lets agents manage Backlog projects, issues and comments, milestones and wikis, and view Git repositories and pull requests. Needs your Backlog space URL and a personal API key, plus Node.js or Docker.

Official MCP from Razorpay, the Indian payments platform: query payments, orders, refunds, settlements and reconciliation reports, and create payment links and QR codes. The hosted remote server is recommended; generate a merchant token from your API key and secret.

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.

Diagnoses page-load and interaction performance from Chrome DevTools traces, network evidence and source code, covering Core Web Vitals, LCP and layout shifts. Separates measured values from estimates and hypotheses, and re-measures fixes under equivalent conditions.

Official Firecrawl skill: crawls a site and its key pages, checks titles, descriptions, heading structure, internal links and keyword opportunities, compares top-ranking competitors, and outputs a prioritized SEO audit. Needs a Firecrawl API key (free: 1,000 credits/month) and its CLI.

Lets agents run the CodeRabbit CLI to review local changes, listing bugs and security issues by severity, and fix unresolved CodeRabbit comments on a PR after you confirm each one. Maintained by CodeRabbit; needs the CLI installed and signed in. Free tier available.

SE Ranking's official skills that turn SEO data into deliverables: content briefs, keyword clustering, AI search visibility, technical site audits, backlink gap and competitor analysis, 90-day SEO plans. Most need SE Ranking API access (OAuth sign-in); Google data skills need Python.

PayPal's official agent toolkit, including the @paypal/mcp server: create and send invoices, handle orders and refunds, manage disputes, subscriptions, product catalogs and shipment tracking, and look up transactions. Needs a PayPal developer access token; defaults to the sandbox.

MongoDB's official plugin: runs the MongoDB MCP locally via npx and adds skills for query generation, index tuning, schema design, and full-text and vector search. Connects to self-hosted or Atlas databases with a connection string.

MongoDB's official skill library covering document model design, driver connection setup, query optimization, natural-language query generation, Atlas full-text and vector search, and stream processing. Works alongside the MongoDB MCP Server.

Miro's official plugin with the Miro remote MCP and three skills: draw codebase explanations on a board, run visual code reviews on the board, and turn board docs, diagrams and prototypes into development specs. Needs OAuth with a Miro account.

Official skills from US broker Alpaca: teach agents to backtest, place and check paper trades, plus developer guides for Broker API account opening, funding and reconciliation. Needs an Alpaca API key (paper trading uses no real money) and the Alpaca CLI; results need professional review.

Slack's official plugin: connects the Slack-hosted MCP to search messages and files, send or schedule messages, and read and write canvases. Includes commands for channel summaries and standup reports, plus skills for building Slack apps. Requires workspace admin approval.

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+.

Canva's official plugin: through the Canva MCP server, edit designs, revise them from review feedback, generate in bulk from brand templates, resize designs for each social platform, and check consistency against your brand kit. Needs a Canva account; bulk generation needs an Enterprise plan.

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.

Webflow's official MCP: manage your site's pages, CMS content and blog posts by chat, and with the MCP Bridge App in the Designer, edit page elements and styles directly. Needs a Webflow account and Node.js 22.3+; first connection asks you to authorize sites.

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).

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.

Salesforce's official hosted MCP servers: after an admin enables them in Setup with an OAuth external client app, agents can query and update CRM records and run Flows under the user's permissions. Needs Enterprise Edition or higher, or a free Developer Edition org. Repo holds docs and Q&A.