Catalog
Every x402, MPP, MCP, and skill listing we've indexed, normalized, and enriched.
Karakeep Self-Hosted Bookmark Manager with AI Tagging
Karakeep (formerly Hoarder) is a self-hosted bookmark-everything app with 24K+ GitHub stars that provides AI-powered automatic tagging, full-text search, link archiving, and a REST API. It supports bookmarking links, notes, images, and PDFs with OCR extraction and RSS feed auto-h
Kamal Zero-Downtime Docker Deployment Tool by Basecamp
Kamal is an open-source deployment tool by Basecamp that deploys containerized web applications anywhere — from bare metal to cloud VMs — with zero downtime using Docker and SSH. It uses kamal-proxy for seamless container switching and works across multiple servers simultaneously
Apache Kafka Schema Registry Validator
Validates Avro, Protobuf, and JSON Schema compatibility against Confluent Schema Registry using the REST API. Enforces backward/forward/full compatibility modes and detects breaking schema evolution changes.
Apache Kafka Schema Registry Extractor
Extracts and transforms Avro/Protobuf schemas from Confluent Schema Registry using the REST API. Generates TypeScript interfaces, JSON Schema, and data contract documentation from registered subjects.
K9s Kubernetes Terminal Dashboard
K9s is a terminal-based UI for managing Kubernetes clusters, providing real-time observation of resources, log tailing, pod shell access, and cluster navigation. Written in Go with over 28,000 GitHub stars, it replaces dozens of kubectl commands with an interactive interface.
Kubernetes Troubleshooting Runbook
The open catalog of AI agent skills — 2,000+ security-scanned skills for Claude Code, Cursor, Codex, and more.
Kubernetes CrashLoopBackOff Diagnoser
Diagnoses CrashLoopBackOff pods using kubectl and the Kubernetes API. Inspects container logs, exit codes, OOMKilled events, and liveness probe configurations to generate actionable remediation steps.
k6 Load Testing and Performance Benchmarking Tool
A modern open-source load testing tool from Grafana Labs, written in Go with JavaScript scripting. Enables developers to write performance tests as code, run HTTP/WebSocket/gRPC load tests, and integrate results with Grafana Cloud for analysis.
k6 Load Testing CLI for JavaScript Performance Scenarios
k6 is a modern load testing tool for writing performance checks in JavaScript. It fits CI, developer testing, and observability workflows where repeatable load scenarios matter.
Just Command Runner
Just is a command runner written in Rust that provides a convenient way to save and run project-specific commands. It uses a justfile syntax inspired by Make but focused on running commands rather than building targets, with support for parameters, dependencies, and multi-languag
Jujutsu Git-Compatible Version Control System
Jujutsu (jj) is a powerful Git-compatible version control system that reimagines VCS workflows with automatic rebasing, first-class conflict tracking, and operation-log undo. Built in Rust with 27k+ GitHub stars, it works directly on existing Git repositories.
JSON-to-Avro Schema Transformer
Transforms JSON Schema definitions into Apache Avro schema format using the jsonschema and fastavro Python libraries. Handles nested objects, arrays, optional fields, and $ref resolution. Registers the resulting Avro schema to Confluent Schema Registry via the Schema Registry RES
JSDoc Type Definition Extractor
Extracts and indexes JSDoc type annotations from JavaScript codebases using the jsdoc-api parser. Generates TypeScript declaration files (.d.ts) and searchable type catalogs from @typedef and @param tags.
JSDoc JavaScript API Documentation Generator
JSDoc is the standard API documentation generator for JavaScript. It parses specially-formatted comments in JavaScript source code to produce HTML documentation pages. With 15,000+ GitHub stars and millions of npm downloads, it is the most widely adopted JavaScript documentation
jrnl Command-Line Journal and Note Capture Tool
jrnl is a command-line journal application that lets you capture thoughts and notes without leaving the terminal. It stores entries as human-readable plain text with optional AES encryption, supports natural-language timestamps, and integrates with external editors and cloud sync
jq Pipeline Builder Agent
Constructs complex jq filter pipelines from natural language queries against JSON/NDJSON data streams. Uses jq built-in functions including path expressions, reduce, and SQL-style operators.
jq JSON Stream Transformer
Constructs complex jq filter expressions for transforming JSON/NDJSON streams, including recursive descent, object construction, and reduce operations. Handles multi-gigabyte streams with jq's streaming parser.
jnv Interactive JSON Navigator and jq Filter Editor
A terminal-based interactive JSON viewer and jq filter editor written in Rust. jnv lets developers navigate complex JSON structures visually while building and testing jq queries in real time, with syntax highlighting, auto-completion, and clipboard support.
Jira Advanced Query Agent
The open catalog of AI agent skills — 2,000+ security-scanned skills for Claude Code, Cursor, Codex, and more.
Jinja2 Template Engine
Renders Jinja2 templates with variable injection, macro expansion, and template inheritance. Integrates with the Jinja2 Environment API for sandboxed execution and custom filter registration.
Jinja2 Infrastructure Template Engine
Generates infrastructure-as-code configurations from Jinja2 templates with variable inheritance. Produces Terraform HCL, Ansible playbooks, and Kubernetes manifests from shared parameter files using hierarchical environment overlays.
Jina Reader URL-to-Markdown Converter and Web Search API
Jina Reader converts any URL to LLM-friendly markdown by prefixing https://r.jina.ai/ to any web address. It also provides a search endpoint at https://s.jina.ai/ that returns web search results in clean markdown format for RAG and agent workflows.
Jina Reader API Skill
Extracts clean markdown content from any URL using the Jina Reader API (r.jina.ai). Handles JavaScript-rendered pages, PDF extraction, and multi-page crawling with depth control. Returns structured LLM-ready text.