Backend and APIs: skills, plugins, subagents, slash commands and mcp servers

build-mcpb official Anthropic skill Packages a local MCP server with Node or Python so users can install it without setting up a runtime first. Claude Code 6,229installs stripe-best-practices stripe skill This skill guides Stripe API choices, payment flows, and integration security. Use it when building, testing, or reviewing Stripe code. Claude Code CX Codex Cursor +1 97,800installs benchmark affaan-m skill This skill measures page, API, and build performance, then compares results before and after a change. Use it to check a release or investigate reports that a page feels slow. Claude Code CX Codex Cursor +1 4,500installs api-connector-builder affaan-m skill This skill builds an API connector by following the target repository’s existing integration pattern. Use it when a new provider should fit the current architecture. Claude Code CX Codex Cursor +1 4,500installs healthcare-phi-compliance affaan-m skill PHI and PII security patterns for healthcare systems under HIPAA, GDPR, and DISHA. Helps configure RLS, audit logging, and stop data leaks in URLs or logs. Claude Code CX Codex Cursor +1 4,500installs prisma-patterns affaan-m skill Production patterns and schema guidelines for Prisma ORM in TypeScript. Helps write safe queries, transactions, and pagination while avoiding connection pool exhaustion. Claude Code CX Codex Cursor +1 4,500installs springboot-verification affaan-m skill This skill runs a Spring Boot verification loop covering builds, code analysis, tests, security scans, and diff review. Use it before a PR or deployment. Claude Code CX Codex Cursor +1 4,500installs django-celery affaan-m skill Django and Celery patterns covering task design, Beat scheduling, retries, and worker setup for offloading heavy jobs. Claude Code CX Codex Cursor +1 4,500installs django-verification affaan-m skill Runs a 12-phase Django verification loop: environment, linters, migrations, pytest coverage, security scans and diff review. Built for pre-PR and pre-deploy checks. Claude Code CX Codex Cursor +1 4,500installs dotnet-patterns affaan-m skill C# and ASP.NET Core architectural conventions for AI coding agents. Enforces patterns for dependency injection, immutability, async/await, and error handling. Claude Code CX Codex Cursor +1 4,500installs jpa-patterns affaan-m skill Provides JPA and Hibernate patterns for entity design, N+1 query prevention, and HikariCP pooling in Spring Boot. Helps write repositories and tune database performance. Claude Code CX Codex Cursor +1 4,500installs solana-dev Solana Foundation skill Skill for building Solana dApps, writing Anchor smart contracts, managing wallets and transactions. Covers setup, testing, and devnet deployment end-to-end. Claude Code CX Codex Cursor +1 98,300installs microsoft-code-reference official github skill Checks Microsoft APIs and SDK code against official docs, finds working samples, and helps debug Azure and .NET issues. GitHub Copilot 14,251installs clickhouse-io affaan-m skill Guides AI agents on ClickHouse table engines, query tuning, and batch ingestion patterns for analytical workloads. Claude Code CX Codex Cursor +1 4,400installs videodb affaan-m skill A skill that wires the VideoDB Python SDK into your agent: ingest, index, search, edit and monitor video and audio from one place. Claude Code CX Codex Cursor +1 4,400installs kotlin-ktor-patterns affaan-m skill Provides reference architecture for Kotlin Ktor servers: routing DSL, Koin DI, JWT auth, kotlinx.serialization, and testApplication tests. Claude Code CX Codex Cursor +1 4,400installs csharp-testing affaan-m skill A skill that gives your agent C# and .NET testing patterns: xUnit, FluentAssertions, mocks, integration tests. Claude Code CX Codex Cursor +1 4,400installs aspnet-core official openai skill Guides building, refactoring, and architecting ASP.NET Core apps using official Microsoft patterns. Helpful for Minimal APIs, Blazor, and migrations. Claude Code CX Codex Cursor +1 3,900installs gemini-interactions-api official google skill This skill guides Gemini Interactions API usage on Gemini Enterprise Agent Platform for stateful chats, background tasks, streaming, and function calling. Claude Code Gemini CLI CX Codex 10,434installs nextjs-app-router-patterns Seth Hobson skill This skill covers Next.js App Router patterns for rendering, routing, and data fetching. Use it when starting an App Router project or moving from Pages Router. Claude Code CX Codex Cursor 32,529installs typescript-mcp-server-generator official github skill Generates a TypeScript MCP server project with tools, resources, and configuration. Use it when a new server should start on the MCP TypeScript SDK v2. GitHub Copilot 12,050installs fastify-best-practices mcollina skill Guides AI assistants in building Fastify backend servers with TypeScript or JavaScript. It covers plugin encapsulation, schemas, logging, and deployment patterns. Claude Code CX Codex Cursor +1 81,100installs voicestudio debpalash skill Connects an agent to VoiceStudio for speech generation, audio transcription, and dubbing workflows through its REST API or MCP server. Claude Code CX Codex Cursor +1 1,700installs architecture official anthropics skill Writes an Architecture Decision Record or reviews a system design: options, trade-offs, consequences. Useful when you have to pick between technologies. Claude Code CX Codex Cursor +1 6,700installs sandbox-stable cloudflare skill This skill helps build and maintain Cloudflare Sandbox apps on the stable @cloudflare/sandbox package. Use it when Workers need isolated Linux environments. Claude Code CX Codex Cursor +1 67,600installs dotnet-design-pattern-review official github skill Reviews selected C#/.NET code for design patterns and suggests improvements without editing files. Use it when you need an architecture-focused code review. GitHub Copilot 11,609installs api-design-principles Seth Hobson skill Use this skill to plan or review REST and GraphQL APIs. It helps when writing a specification or setting API conventions for a team. Claude Code CX Codex Cursor 30,348installs sandbox-migrate-to-next cloudflare skill Skill guides migration of Cloudflare Sandbox applications from the stable @cloudflare/sandbox package to the prerelease @cloudflare/sandbox@next (SDK 1.0). Use it when preparing code for the future stable release. Claude Code CX Codex Cursor +1 66,900installs gemini-agents-api official google skill Manages Agent resources in Gemini Enterprise Agent Platform through its API. Use it when you need to configure an agent before starting conversations. Claude Code Gemini CLI CX Codex 9,466installs upgrade-stripe stripe skill Guides an agent through Stripe API, webhook, and SDK version upgrades. Use it when moving an integration to a target API version. Claude Code CX Codex Cursor +1 72,800installs postgresql-table-design Seth Hobson skill Helps design and review PostgreSQL schemas with guidance on data types, keys, constraints, indexes, and table partitioning. Claude Code CX Codex Cursor 27,780installs cli-creator official openai skill Builds durable command-line tools from API docs, OpenAPI specs, or curl commands. Configures system-wide binaries with JSON output and auth handling. Claude Code CX Codex Cursor +1 3,200installs python-mcp-server-generator official github skill Builds Python MCP servers that expose functions, APIs, or databases as tools for AI clients. Use it when starting a server with MCP Python SDK v2. GitHub Copilot 10,418installs fastapi-templates Seth Hobson skill This skill scaffolds FastAPI projects with async routes, dependency injection, and error handling. Use it when starting a Python API. Claude Code CX Codex Cursor 25,840installs dataverse-python-production-code official github skill Guides GitHub Copilot to write Python code for the Dataverse SDK with error handling, request retries, and OData query rules. GitHub Copilot 9,803installs kotlin-springboot official github skill This skill guides Spring Boot and Kotlin work, from project structure to tests and coroutines. Use it when an agent is writing or reviewing a backend service. GitHub Copilot 9,781installs mcp-cli official github skill CLI interface for calling MCP server tools from the command line. Useful when you need to automate access to external APIs, filesystems, or databases through MCP. GitHub Copilot 9,650installs agent-governance official github skill Provides governance patterns for AI agents that use APIs, databases, or file systems. Use it when agent actions need policy checks, threat detection, and audit records. GitHub Copilot 9,623installs create-spring-boot-java-project official github skill Creates a Spring Boot Java skeleton with Maven, database settings and Docker Compose. Use it when a new API needs PostgreSQL, Redis and MongoDB locally. GitHub Copilot 9,516installs openapi-to-application-code official github skill Generates an application from an OpenAPI spec using the chosen framework's conventions. Use it when starting an API project from a specification. GitHub Copilot 9,448installs