Tools

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.

Official plugin for Clay, the GTM data platform: search target companies and contacts, find work emails and other details in bulk, query and analyze Clay tables, and draft sales outreach sequences. Needs a Clay account; run the bundled setup skill to install the clay CLI and sign in.

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.

Skill for naming products, brands, companies and open-source projects: writes a naming brief, explores metaphors, generates candidates while filtering out generic AI-style names, scores them on a rubric, then checks domain, social handle and package name availability. Good for early-stage startups.

Sonar's official plugin bringing SonarQube checks into the agent coding loop: secrets-scanning hook, issue fixing, quality gates, coverage and dependency risk; with Vortex analysis on, every edit is checked. Needs SonarQube (free Community Build works), the sonar CLI and Docker.

From Twilio Labs: exposes Twilio's public APIs (SMS, voice, phone numbers, Serverless and more) as MCP tools generated from its OpenAPI specs, with filtering by service or tag. Needs a Twilio API key; marked as a proof of concept.

Shapes the agent's own replies rather than your documents: separates what changed from what was verified, cuts invented confidence, leads with the action and keeps load-bearing caveats. Manually invoked and stays on until you say stop; a script can enable it in CLAUDE.md or AGENTS.md.

Neon's official plugin combining the Neon MCP and skills to manage serverless Postgres: projects and branches, object storage, Functions and the AI Gateway. Signs in to Neon via OAuth the first time you use the MCP.

Official MCP (beta) from payments and POS platform Square: lets agents query and manage transactions, orders, refunds, invoices, inventory and customers for reconciliation and reporting. Hosted, with Square OAuth sign-in, nothing to install; confirm refunds and other writes manually.

Analyzes your codebase and generates a render.yaml Blueprint, or creates services directly through the Render MCP, to deploy apps to Render. Maintained by Render and included in OpenAI's curated skills. Needs a Render account and code pushed to GitHub, GitLab or Bitbucket.

PostHog's official plugin with a built-in MCP and 30+ skills: query product analytics, feature flags, A/B experiments, dashboards and error tracking from chat, and optionally send Claude Code sessions to LLM Analytics. Needs OAuth sign-in with a PostHog account.

MLflow's official skills plugin: lets coding agents add MLflow Tracing to LLM apps, analyze failed traces, build evaluation datasets and scorers, and query token and latency metrics, closing the instrument, evaluate, iterate loop. Needs MLflow 3.8+.

Prisma's official skills: the Prisma ORM CLI, Client query API, connection setup for various databases, a v6 to v7 upgrade guide, and deployment workflows for Prisma Postgres and Compute.

Official RevenueCat plugin: configure in-app purchase projects, products, entitlements and offerings from chat, view revenue, conversion funnels and experiment data, with SDK skills for iOS, Android, Flutter and more. Needs RevenueCat OAuth sign-in; SDK setup needs a developer.

Turns a topic, rough notes or an outline into an animated web slide deck. Invents a custom theme, shows a two-slide preview and builds the full single-file HTML deck with speaker notes only after you approve. Also edits existing reveal.js decks and can export PDF or deploy.

Pinecone's official plugin: bundles the Pinecone MCP server and /pinecone skill commands to create vector indexes, upsert data, search in plain language, or build a document Q&A assistant with citations from Claude Code. Needs a Pinecone API key (free sign-up); Assistant features also need uv.

HashiCorp's official MCP: lets agents manage Vault mounts, read and write KV secrets, enable PKI, create issuers and roles, and issue certificates. Needs a reachable Vault server and token; HashiCorp recommends using it only in trusted local environments.

Beancount's official query tool, bean-query: run SQL-like queries on plain-text double-entry ledgers to get balances, income and expense summaries and account details, for agent-assisted bookkeeping. Needs uv or Python 3.8+ and a Beancount ledger; have an accountant review reports.

Reads local hledger plain-text ledgers to produce balance sheets, income and cash flow statements and spending stats, and can add or edit entries (dry-run previews, backups before writes). Needs hledger and Node.js; start read-only. Have an accountant review reports.

Official MCP for Norman, a German bookkeeping and tax service: create invoices (including ZUGFeRD e-invoices), categorize transactions, match receipts, preview and file VAT returns, and prepare GmbH/UG formation documents. Needs a Norman account (OAuth); a tax advisor should review filings.

Typefully's official skill: lets agents draft posts and long threads and schedule or publish them to X, LinkedIn, Threads, Bluesky, Mastodon and Substack Notes, and view scheduled content. Needs a Typefully account and API key, plus Node.js 18+.

Drafts US-law contracts: the agent gathers terms for standard templates (NDA, SAFE, offer letter, cloud services agreement) and outputs a DOCX to review in Word, plus guides and checklists citing source law. Use the hosted URL, or run locally for sensitive matters. Drafts only; a lawyer must review.

Trivy's MCP plugin: lets agents scan local projects, container images and remote repositories for vulnerabilities and misconfigurations in plain language, optionally checking policy compliance via the Aqua platform. Requires Trivy; maintained by Aqua Security.

Helps agents add Auth0 authentication to apps: detects 35+ frameworks and covers login, MFA, SSO, RBAC, JWT validation, migration from other auth providers, and tenant security audits. Maintained by Auth0; needs an Auth0 account (free sign-up).