Backend and APIs

19,654 mods in this category, of every kind an agent can take. Each one carries what it costs per session, what the scan found, and whether it is the original.

ag2-a2a

817

ag2ai/ag2-skills

Skill Claude CodeCodex

Serve an AG2 Agent over the Agent-to-Agent (A2A) protocol (a2a-sdk >= 1.3) and call remote A2A agents. Server: A2AServer(agent) then buildjsonrpc(url=) / buildrest(url=) (Starlette ASGI apps for uvicorn) or buildgrpc(bind=, grpcurl=, servercredentials=), publishing an AgentCard (buildcard) at…

not rated 12 changed 2d ago A 288 tokens original Apache-2.0

add-login

818

sso-ss/vibe-ship-it

Skill Claude CodeCodex

Adds user authentication. Triggers: 'login', 'log in', 'sign in', 'sign up', 'register', 'authentication', 'auth', 'only I can see', 'protect this page', 'private page', 'admin area', 'user accounts', 'members only', 'password protect'.

not rated 12 7mo ago A 65 tokens original MIT

api-design

819

svngoku/coding-agents-skills

Skill Claude CodeCodex

Design and review intuitive, scalable, maintainable HTTP APIs. Use this skill whenever the user wants to design a new REST API, review an existing API or spec, write OpenAPI 3.x definitions, or work with HTTP semantics (GET/POST/PUT/PATCH/DELETE), status codes, idempotency (Idempotency-Key), error envelopes (RFC 7807…

not rated 12 yesterday A 144 tokens original MIT

layered-rails

820

zarpay/rails-template

Skill Claude Code

Design and review Rails applications using layered architecture principles from "Layered Design for Ruby on Rails Applications". Use when analyzing Rails codebases, reviewing PRs for architecture violations, planning feature implementations, or implementing patterns like authorization, view components, or AI…

not rated 12 2mo ago A 93 tokens original MIT

laravel-skill

821

Foysal50x/skills

Plugin Claude Code

Bundles 6 skills, 1 plugin · 518 tokens together

Laravel engineering, architecture, Eloquent, REST API, async and testing skills — context-aware implementation and domain-driven patterns for Laravel apps.

not rated 12 changed 8d ago A tokens not measured original MIT

kotlin-ktor-patterns

822

gongyijie85/dsh-ecc

Skill Claude CodeCodex

Ktor server patterns including routing DSL, plugins, authentication, Koin DI, kotlinx.serialization, WebSockets, and testApplication testing. Use when building a Ktor server — routing, plugins, auth, DI, serialization, or tests.

not rated 12 +1 1mo ago A SkillSpector: pass 55 tokens original MIT

vandalizer-api

823

ui-insight/vandalizer

Skill Claude Code

Talk to the Vandalizer Management API — /api/mgmt/v1. Use when the user says "/vandalizer-api", asks to query the management API, pastes a vklive… key, asks to check Vandalizer dev/prod stats, validation runs, workflows, audit log, or wants to run a workflow/validation/extraction via the management surface.

not rated 12 +1 yesterday A 84 tokens GPL-3.0

tony-stark

824

CohesiumAI/assemble

Agent Claude Code

Senior System Architect — software architecture design, stack selection, scalability, security, technical trade-offs. Call for any structural choice: stack, infra, patterns, migration, service decomposition.

not rated 11 3mo ago A 41 tokens original MIT

hs-sql-agent

826

tse-wei-chen/hs-sql-agent

MCP server Cursor

MCP server "hs-sql-agent", hosted remotely at localhost, as configured in tse-wei-chen/hs-sql-agent.

not rated 11 +1 changed 2mo ago A tokens not measured original Apache-2.0

elliot marketplace

827

EliBarak12/Elliot

Plugin Claude Code

Lists 2 plugins

Turn any API or database into agent-ready MCP tools. The Elliot marketplace ships the platform plugin (10 skills + MCP server + connector templates).

not rated 11 3d ago A tokens not measured original MIT

java-security-jwt

828

lambert0529/skills

Skill Claude CodeCodex

A guide for adding JWT authentication to a Spring Boot application. JWT is a signed token used to identify a user between requests, while role-based access control limits what different users may do.

not rated 11 9mo ago A 93 tokens original Apache-2.0

mcp-builder

829

Zenobia000/learn-claude-code

Skill Claude CodeCodex

Build MCP (Model Context Protocol) servers that give Claude new capabilities. Use when user wants to create an MCP server, add tools to Claude, or integrate external services.

not rated 11 3mo ago A 38 tokens copy · 100% MIT

garveyhu/awesome-skills

Skill Claude CodeCodex

FastAPI project initialization, development guidance, and code review based on personal architectural conventions (uv+fastapi+sqlalchemy+alembic+loguru+ruff). Use when: (1) Creating/initializing a new FastAPI project, (2) Adding new endpoints, services, modules, or models to an existing FastAPI project, (3) Reviewing…

not rated 11 9d ago A 179 tokens

java-spring-framework

831

AyrtonAldayr/agent-skill-java-spring-framework

Skill Claude CodeCodex

Senior Java & Spring Boot 4 / Spring Framework 7 architect skill for 2026-standard development. Use when the user asks to build, scaffold, design, review, or explain Java applications using Spring Boot 4.x, Spring Framework 7.x, Spring Modulith, or any related Spring ecosystem project. Triggers include: creating REST…

not rated 11 8mo ago A 165 tokens

flowforge-testing

833

Remon-16/flow-forge

Skill Claude CodeCodex

Generate, modify, validate, execute and triage Flow Forge API test cases. Use when the user wants to turn requirement documents, API documents, table structures or business rules into executable YAML/Excel test cases, revise existing cases after requirement/API changes, run cases with the Flow Forge executor and…

not rated 11 3mo ago A 90 tokens original MIT

validator

834

AIJeonCoding/multiAgentSettingSample

Agent Claude Code

A review process that checks whether a front end and back end agree on how an API works, including request fields, response data, types, and error codes.

not rated 11 6mo ago A 86 tokens original MIT

Vrivaans/invok-oss

Skill Claude CodeCodex

Documents the Invok HTTP execution API contract: how to call tools, how responses are structured, how to handle errors, and how to write defensive extraction code for workflow nodes. Use this skill when generating workflow code that calls Invok's /api/v1/execute/{toolCode} endpoint — not during the discovery and…

not rated 11 2mo ago A 73 tokens AGPL-3.0

rocketmq

837

AI-888/06-Aether

Skill Claude CodeCodex

A troubleshooting skill for Apache RocketMQ, a messaging system that sends data between applications. It covers failures in sending and receiving messages, message backlogs, connections, and access permissions.

not rated 11 6mo ago A 15 tokens original MIT

sena-ai

838

unlimiting-studio/sena-ai

Skill Claude CodeCodex

Use this skill when building or modifying an AI agent with the @sena-ai framework. It covers new-project setup, Slack connectors (HTTP/Socket Mode), writing sena.config.ts (runtime, hooks, schedules), defining custom tools, connecting MCP servers, and operating the CLI.

not rated 11 3mo ago A 60 tokens

spring-boot-migration

839

mindcockpit-ai/cognitive-core

Skill Claude Code

Spring Boot version upgrade paths from v2.x through v4.0. javax to jakarta migration, Spring Security 5 to 7, RestTemplate to RestClient, virtual threads, OpenRewrite recipes, and progressive migration strategies.

not rated 11 changed 22d ago A 52 tokens

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