Catalog
Every x402, MPP, MCP, and skill listing we've indexed, normalized, and enriched.
Validate JSON data and config files against schemas with ajv-cli
Run schema checks from the shell or CI so malformed JSON, JSON5, or YAML inputs fail before they reach downstream tooling.
Validate, dry-run, and expose YAML agent runbooks as MCP tools with DeclarAgent
Turn YAML runbooks into auditable agent actions with validation, dry-runs, destructive-step approval, and optional MCP exposure.
Validate CloudFormation templates before deploy with cfn-lint
Catch CloudFormation schema, region, and intrinsic-function mistakes before a stack update fails in review or deployment.
Validate CI and app config files against upstream JSON schemas before merge
Use check-jsonschema when an agent needs to catch broken GitHub Actions, Renovate, Azure Pipelines, and other schema-backed config files before they hit CI. The agent picks the right schema hook, validates the changed files, and reports the exact key or structure that drifted fro
Vale Prose Linter for Technical Documentation
Vale is an open-source, markup-aware prose linter that enforces editorial style guides on technical documentation. This skill enables agents to run Vale against Markdown, AsciiDoc, reStructuredText, and HTML to catch style, grammar, and terminology issues.
uv Ultra-Fast Python Package and Project Manager
uv is an extremely fast Python package and project manager written in Rust by Astral (creators of Ruff). It replaces pip, pip-tools, pipx, poetry, pyenv, virtualenv, and twine with a single tool that resolves and installs packages 10-100x faster.
usql Universal Command-Line SQL Client for Multiple Databases
usql is a universal command-line interface for SQL databases including PostgreSQL, MySQL, SQLite, Oracle, SQL Server, and dozens more. It provides a consistent psql-like experience with syntax highlighting, tab completion, and cross-database copying.
Use RAGFlow as a retrieval and context layer for agent workflows
Build a supervised RAG context layer with RAGFlow so agents can index documents, retrieve grounded context, and answer with traceable source support.
Use an escalating scrape strategy in Claude Code before reaching for browser automation
Start with cheap static fetches, escalate to a browser only when needed, validate findings, and turn the result into a production-ready scraping approach.
Uptime Robot Status Page Webhook Alerter
Integrates with the Uptime Robot API to monitor status page changes and push webhook alerts to Slack or PagerDuty. Uses the UptimeRobot getMonitors endpoint to detect downtime transitions.
Uptime Robot Multi-Check Coordinator
Manages bulk uptime monitoring via the Uptime Robot API v2. Creates HTTP, keyword, and port monitors with alert contacts, maintenance windows, and status page synchronization.
Uptime Kuma Status Sync
Interfaces with the Uptime Kuma Socket.IO API to monitor service health checks. Syncs status page data to Statuspage.io via Atlassian REST API and triggers incident workflows in Rootly.
Uptime Kuma Self-Hosted Uptime Monitoring Platform
Uptime Kuma is an open source uptime monitor for HTTP, TCP, ping, DNS, Docker, and keyword checks. It gives agents a concrete way to create, update, and review monitors, incidents, notifications, and public status pages from a self-hosted monitoring stack.
Upstash MCP Server for Redis and QStash Management
An official MCP server from Upstash that lets AI agents manage Redis databases, QStash message queues, and Vector stores through natural language. Supports database creation, key operations, backups, and throughput analytics via the Model Context Protocol.
Upscayl Open Source AI Image Upscaler
Upscayl is a free, open-source AI image upscaler for Linux, macOS, and Windows. It uses Real-ESRGAN models with Vulkan GPU acceleration to enhance low-resolution images, supporting batch processing, custom models, and multiple output formats.
Upptime GitHub Actions Uptime Monitor and Status Page
An ASE skill built around Upptime, the open source uptime monitor and status page system powered by GitHub Actions, Issues, and Pages. It is a strong fit when an agent needs lightweight endpoint monitoring, incident issue tracking, and a public or internal status site without mai
Update repository docs automatically after code changes and open review PRs
Use GitHub Next's update-docs workflow when code changes should trigger documentation maintenance instead of waiting for humans to remember it later. The agent analyzes what changed, generates the missing docs updates, and opens a reviewable PR rather than silently rewriting the
Unstructured Document Partitioning and ETL Library for LLM Pipelines
Unstructured is an open-source library for ingesting and partitioning PDFs, HTML, Office documents, emails, and other unstructured inputs into structured elements and metadata. It is commonly used as a preprocessing layer for RAG, search, extraction, and downstream AI pipelines.
Unstructured Document ETL Toolkit
Unstructured is an open source document ETL toolkit for converting PDFs, HTML, emails, and office files into structured data. This skill covers how to use the real Unstructured project for partitioning documents, normalizing content, and feeding downstream agent or RAG pipelines.
Unstructured Document ETL for LLM Pipelines
Unstructured is an open source document processing library that converts PDFs, HTML, Office files, emails, and other formats into structured data for downstream AI workflows. It is a practical intake layer for extraction, chunking, and preprocessing before embeddings, search, or
Unlighthouse Site-Wide Lighthouse and SEO Auditing
Unlighthouse runs Google Lighthouse across an entire site instead of just a single page. This skill gives agents a repeatable way to crawl URLs, surface SEO and accessibility issues, and return prioritized audit findings for content and technical optimization work.
Unkey Open Source API Key Management and Rate Limiting Platform
Unkey is an open-source developer platform for managing API keys, rate limiting, and usage analytics. It provides a fast, globally distributed key verification system that integrates into any API with minimal code changes.
Unit-test Helm charts with YAML assertions before deployment templates reach clusters with helm-unittest
Render a Helm chart locally and assert on the generated Kubernetes objects before a broken template makes it to a cluster.
Umami Privacy-Focused Web Analytics Platform
Umami is a modern, privacy-focused, open-source web analytics platform and a self-hostable alternative to Google Analytics, Mixpanel, and Amplitude. It collects website traffic data without cookies and is fully GDPR compliant.