Best backend and API skills for Claude Code, Codex and other agents.

Guides the design and implementation of Model Context Protocol servers in TypeScript or Python, from tool naming and error messages to evaluation.

anthropics/skills

A skill your agent uses whenever the user mentions Horizon by name in a Laravel context.

coollabsio/coolify

Hardens code against vulnerabilities. An agent skill from penpot/penpot.

penpot/penpot

NestJS best practices and architecture patterns for building production-ready applications.

rolling-scopes/rsschool-app

Manages a Sub2API deployment from the command line: accounts, redeem and invitation codes, groups, proxies, imports, exports and raw admin API calls.

Wei-Shaw/sub2api

Gets Firecrawl working in a project: signs you in through the browser, saves FIRECRAWL_API_KEY to .env and picks the first SDK or REST path.

firecrawl/firecrawl

Walks through building MCP servers in Python or TypeScript that expose tools, resources and prompts to Claude, with templates, registration and testing.

shareAI-lab/learn-claude-code

Create and edit Obsidian Bases (.base files) with views, filters, formulas, and summaries.

Atmosphere/atmosphere

You MUST use this before any creative work - creating features, building components, adding functionality, or modifying behavior.

xpinjection/test-driven-spring-boot

Explains how to bundle Model Context Protocol servers in a Claude Code plugin, covering config files, stdio, SSE, HTTP and WebSocket server types, and authentication.

anthropics/claude-plugins-official

ACTIVATE when the user works on authentication in Laravel. An agent skill from coollabsio/coolify.

coollabsio/coolify

A skill your agent uses for Laravel MCP development. An agent skill from coollabsio/coolify.

coollabsio/coolify

Adds Firecrawl's /scrape endpoint to application code to pull markdown, HTML, links, screenshots or structured data from a single known URL.

firecrawl/firecrawl

Adds web search, scraping, structured extraction and browser interaction to application code using Firecrawl's scrape, search and interact endpoints.

firecrawl/firecrawl

A skill your agent uses when creating new agent skills or improving existing ones - ensures skills are discoverable, scannable, and effective through proper structure, discovery optimization, and…

NangoHQ/nango

Turns an API description, such as an OpenAPI file or a Postman collection, into a connector plugin for ToolJet's marketplace and checks it with the repo's validator.

ToolJet/ToolJet

General Supabase skill for database, auth, Edge Functions, Realtime and storage work, plus client libraries, migrations, security audits, debugging and reading logs.

supabase/agent-skills

Reviews backend code under api/ for concrete, reproducible defects, routes to rule packs for architecture, schema, repositories and SQLAlchemy, and ranks findings from P0 to P3.

langgenius/dify

A skill your agent uses when implementing or debugging ANY network request, API call, or data fetching.

CherryHQ/cherry-studio-app

Find, evaluate, and download common purchasable CAD parts from step.parts, including named off-the-shelf actuators, servos, motors, electronics boards, connectors, screws, bolts, nuts, washers…

earthtojake/text-to-cad

Guides adding Firecrawl's /interact endpoint to product code for pages that need clicks, forms, pagination or logged-in flows beyond plain scraping.

firecrawl/firecrawl

Sets layered architecture and coding rules for Node.js, Express and TypeScript microservices, covering routes, controllers, services, repositories, Prisma, Sentry and Zod.

diet103/claude-code-infrastructure-showcase

Designs REST and GraphQL APIs from resource modeling to an OpenAPI 3.1 contract, with versioning, pagination and RFC 7807 error handling.

Jeffallan/claude-skills

Drives headless Chrome through Cloudflare Browser Rendering over a CDP WebSocket to take screenshots, navigate and scrape pages, and record multi-page videos.

cloudflare/moltworker

Apply this skill whenever writing, reviewing, or refactoring Laravel PHP code.

anonaddy/anonaddy

Set up, repair, or migrate to Cloudflare Turnstile bot verification in an existing frontend and backend, including server-side Siteverify.

cloudflare/skills

Guidance for adding Firecrawl's /search endpoint to product code and agent workflows when a feature starts from a query rather than a URL.

firecrawl/firecrawl

Guides changes to an existing Twenty app: adding or editing objects, layouts, logic functions and front components, with a plan stated before multi-entity edits.

twentyhq/twenty

Interact with Obsidian vaults using the Obsidian CLI to read, create, search, and manage notes, tasks, properties, and more.

Atmosphere/atmosphere

Build, refactor, and troubleshoot Laravel Actions using lorisleiva/laravel-actions.

coollabsio/coolify

Interact with the Paperclip control plane API for task coordination and governance.

paperclipai/paperclip

Comprehensive guide for implementing NetworkPolicy, PodSecurityPolicy, RBAC, and Pod Security Standards in Kubernetes.

Cybereason-Public/owLSM

This skill should be used when the user is writing Go code and needs guidance on Go-specific pedantry: error wrapping with fmt.Errorf and %w, interface design (accept interfaces return structs)…

chromedp/chromedp

Enforces that every error in a service is captured to Sentry v8, with patterns for controllers, routes, cron jobs and database performance spans instead of console logging alone.

diet103/claude-code-infrastructure-showcase

Execute read-only Ruby/Rails commands against Gumroad's production database for debugging and investigation.

antiwork/gumroad

Build production-ready Node.js backend services with Express/Fastify, implementing middleware patterns, error handling, authentication, database integration, and API design best practices.

ever-works/ever-works

Turns an OpenAPI or Swagger spec into an MCP server with the mcp-use TypeScript SDK, mapping each operation to a tool, wiring auth, testing and deploying.

mcp-use/mcp-use

Sets the backend TypeScript and Cloud VM rules for cmux: Effect-based services, thin route handlers, Postgres as source of truth, migrations and provider secrets.

manaflow-ai/cmux

A skill your agent uses when the user mentions Yaak, a Yaak workspace, or the yaak command, or asks to call, hit, or smoke test HTTP/REST endpoints, save or organize API requests for reuse or manual…

mountain-loop/yaak

Reference help for the CCXT library covering crypto exchange APIs, market data, trading and order management across 150+ exchanges in JavaScript, Python and PHP.

2025Emma/vibe-coding-cn

A skill your agent uses when working with Payload projects (payload.config.ts, collections, fields, hooks, access control, Payload API).

payloadcms/payload

A skill your agent uses when adding authentication, handling user input, working with secrets, creating API endpoints, or implementing payment/sensitive features.

jewbetcha/opentrace

Read and update global application settings: system prompts, thinking budget, IP filters, payload rules, combo defaults, and require-login…

diegosouzapw/OmniRoute

A skill your agent uses to analyze how a Laravel application is actually written and record its conventions as shared rules.

anonaddy/anonaddy

Configure Better Auth server and client, set up database adapters, manage sessions, add plugins, and handle environment variables.

latitude-dev/latitude-llm

Creates and queries KubeSphere users, workspaces and projects and assigns built-in roles, defaulting to least privilege and never deleting anything.

kubesphere/kubesphere

Guides building, debugging and testing LangBot plugins: components, SDK calls, README and locale rules, SDK pitfalls and WebSocket-based testing.

langbot-app/LangBot

Crosspost Wasp blog articles (MDX) to DEV.to and Medium. An agent skill from wasp-lang/wasp.

wasp-lang/wasp