13,258 tagged Backend and APIs, measured the same way as everything else here.
Browse within: LLM 148agents 116skills 116agent 88agentic-ai 85api 80azure 68antigravity 65claude-code-plugin 61ai-coding 57cursor 54cli 53cybersecurity 53javascript 52
Skill Claude CodeCodex
Build a production-grade outbound webhook system with retries, signing, failure tracking, and re-delivery. Use when implementing webhook delivery, event subscriptions, or handling webhook failures and reliability.
Skill Claude CodeCodex
Comprehensive guide for building high-performance, type-safe web applications with ElysiaJS framework. Covers plugin architecture, schema validation, lifecycle hooks, authentication patterns, database integration, and Bun runtime optimization. Use when building REST APIs, microservices, or backend applications with…
Skill Claude CodeCodex
A generator for Apifox API test cases. Apifox is a tool for designing, documenting, and testing web APIs, and this add-on includes a command for listing API endpoints.
aps08/fullstack-clean-architecture
Skill Claude CodeCodex
Guidelines for RESTful API design, resource hierarchies, endpoint naming conventions, and standardizing JSON responses.
Skill Claude CodeCodex
I give you a real email inbox and let you send, receive, search, and manage email threads programmatically via the Commune API. Every inbox I create is RFC 5322 compliant — replies thread correctly in any email client, including Gmail, Apple Mail, and Outlook.
cwoodruff/dotnet-claude-workshop-content
Skill Claude Code
Add a new Minimal API endpoint following this solution's conventions. Use when the user asks to add a route, endpoint, or new API operation (GET/POST/PUT/DELETE).
Naoufal-Charafat/muleSoft-skills
Skill Claude CodeCodex
Generate complete MuleSoft projects implementing API design patterns from JJ Geewax's "API Design Patterns" book. Use this skill when users request to create MuleSoft integration projects, API archetypal patterns, REST API implementations, or examples based on industry-standard API patterns including Long Running…
juliosilvacwb/agent-driven-development
Skill Claude CodeCodex
Guides the Architect Agent to apply Hexagonal Architecture (Ports & Adapters) and Dependency Inversion to maximize component decoupling, enabling the highest degree of parallel task execution by AI agents. Use this skill whenever designing the architecture for a new feature or module.
Skill Claude CodeCodex
Production-grade Laravel development — ship robust apps without common pitfalls.
Skill Claude CodeCodex
Expert-level Discord bot development with discord.js v14, the Discord REST API, and bot architecture. Use this skill whenever the user is building, debugging, or architecting a Discord bot or integration. Triggers on: discord.js, slash commands, interactions, embeds, buttons, modals, select menus, autocomplete…
Skill Claude CodeCodex
Configure CORS correctly and safely — allowlist real origins, handle preflight, scope credentials and headers narrowly, and never reflect arbitrary origins.
Skill Codex
A general entry point for Remnawave, a panel for managing users, Nodes, subscriptions, configurations, routing, and an API. It routes a task to the relevant specialist guide and keeps the work tied to official documentation.
Skill Claude CodeCodex
Padroes MVC do Protheus (FWFormModel/FWFormView) para ADVPL/TLPP. Use esta skill SEMPRE que o usuario pedir para criar ou manter rotinas MVC, cadastros CRUD, browses FWMBrowse, telas master-detail, monitores, ou qualquer rotina que use MPFormModel, FWFormView, FWFormStruct, ModelDef, ViewDef, MenuDef, ou FWMBrowse.…
Skill Claude CodeCodex
Expert Ruby on Rails development with Rails 7/8 conventions, security hardening, and performance patterns.
SaiHemanthMaddi/AI-Agent-QA-Skills-Lab-Repo
Skill Claude CodeCodex
API testing with Playwright APIRequestContext for REST and GraphQL endpoints.
Skill Claude CodeCodex
Build a generic-installable CLI tool with its companion SKILL.md so any agent (Vellum, Claude, GPT, etc.) can pick it up and use it. Use when the task is "ship a CLI for service X" or "wrap API Y in a tool agents can call." Out of scope for one-off internal scripts that don't need agent discovery, and for skills that…
kuil09/tossinvest-openapi-agent-pack
Skill Claude CodeCodex
Use when integrating Toss Securities Open API for market data, holdings, order workflows, and approval-gated execution.
Skill Claude CodeCodex
Give an AI agent a real, deliverable email address. Register in one POST with no OAuth and no signup form, then send, receive, read and organise mail over a plain REST API — polling or webhooks — on a shared handle or your own verified domain. Receiving and mail between agents are free; mail to outside addresses is…
Skill Claude CodeCodex
Architecture rules, naming conventions, and CQRS handler patterns for this .NET solution. Load this whenever generating, reviewing, or refactoring C# code in this repository so output matches the existing codebase instead of generic patterns.
erikboderek/sf-public-sector-skills
Skill Claude CodeCodex
PSS v68.0 native data model: Licensing/Permitting, Inspections, Regulatory Framework, Applications, Benefits, Programs, Grantmaking, Discovery Framework, Complaints, Enforcement, Visits, Party/Identity. TRIGGER: PSS object design, API name mapping, native-vs-custom decisions. SKIP: non-PSS work or pure OmniStudio.
Skill Claude CodeCodex
Compile a chained-action config (per chain-re-action SPEC.md) for a multi-step stateful API before writing any client code. Use when building or reviewing an API client / business layer for flows like search→price→book, authorize→capture, or provision→attach→activate — where later steps mutate external state…
pwdel/spec-socialpredict-tasks
Skill Codex
Navigate, query, and make precise edits to SocialPredict's large backend/docs/openapi.yaml without loading the whole file. Use when inspecting tags, paths, operations, schemas, or $ref usage; reconciling the spec with backend handlers and routes; or applying the hard OpenAPI constraints from backend/docs/API-ISSUES.md…
AndreiBozantan/svelte-axum-template
Skill Claude CodeCodex
Performs a strict code review of Rust backend code (files, diffs, or snippets). Trigger whenever the user shares backend code (Rust, SQL) and asks for a review, feedback, or says "review this" — including partial snippets.
Skill Claude CodeCodex
Use when building or editing a small database-backed web app in ANY stack — plain PHP, Laravel, or Supabase, on MySQL/MariaDB, PostgreSQL, SQLite, SQL Server, or a hosted DB — scaffolding a project, creating or evolving a database, designing tables or writing SQL, adding login/registration or user roles, building a…
At most 3 mods per repository are shown here, and a mod shipped inside a plugin is left to that plugin's page — the rest are on their repository pages: