Anthropic

MCP server that provides current time in various timezones and time conversion between zones using IANA timezone identifiers.

MCP server that enables dynamic, reflective problem-solving through sequential thought chains with branching, revision, and hypothesis testing.

MCP server that provides persistent memory through a knowledge graph. Stores entities, relations, and observations in a local JSON file.

MCP server for Git repository operations — clone, status, diff, log, commit, branch, and checkout across local repositories.

MCP server providing file system access — read, write, move, search, and get directory listings within configurable allowed paths.

MCP server that fetches web content and converts it to markdown. Supports HTTP requests with configurable user-agent and content size limits.

Reference MCP server implementing all protocol features — resources, tools, prompts, sampling, and logging. Useful for testing MCP clients.

Excel file creation, editing, and analysis with financial modeling standards, formula construction rules, and mandatory recalculation via LibreOffice.

Python-based toolkit for testing local web applications using Playwright browser automation with server lifecycle management.

Suite of tools for creating multi-component Claude.ai HTML artifacts using React 18, TypeScript, Vite, Parcel, Tailwind CSS, and shadcn/ui.

Toolkit for styling artifacts with 10 pre-set professional themes including curated color palettes and font pairings, plus custom theme generation.

Creates Slack-optimized animated GIFs with frame assembly, platform validation, and smooth motion effects for emoji and message formats.

Creates, modifies, and evaluates skills through structured testing with parallel subagent runs, grading, benchmarking, and description optimization.

Full PowerPoint lifecycle management — reading, editing, and creating .pptx files with extensive design guidance and mandatory subagent-driven visual QA workflow.

Comprehensive PDF manipulation: reading/extraction, merge/split/rotate, creation via reportlab, OCR for scanned PDFs, watermarking, image extraction, form filling, and security (encryption, passwords).

Skill for creating high-quality MCP servers that enable LLMs to interact with external services. Covers deep research and planning, implementation, review and testing, and evaluation creation.

Resource collection for writing organizational communications: 3P updates, newsletters, FAQ responses, status reports, and incident reports.

Creates distinctive, production-grade frontend interfaces with high design quality. Generates polished HTML/CSS/React code that avoids generic AI aesthetics.

Manages Word document creation, editing, and analysis. Uses the docx npm package for creation and XML unpack/edit/repack workflow for editing.

Guides users through a structured three-stage workflow for co-authoring documentation, proposals, technical specs, and decision docs.

Creates visual art on a canvas (.png and .pdf) using design philosophy principles. Generates museum-quality, design-forward compositions with minimal text via Python.

Applies Anthropic's official brand colors and typography for consistent visual styling across presentations, slides, and other artifacts.

Creates generative art using p5.js with seeded randomness, algorithmic philosophy manifestos, and interactive parameter exploration.