Backend & APIs · GraphQL

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

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

Sets the rules for writing GraphQL queries and mutations in .gql files, running codegen, and using generated Apollo hooks with proper error and loading handling.

ChrisWiles/claude-code-showcase

A skill your agent uses when doing ANY task involving Supabase.

curvenote/curvenote

REST 및 GraphQL API 설계 원칙 가이드. An agent skill from jh941213/my-cc-harness.

jh941213/my-cc-harness

Guides stable API and interface design. An agent skill from dzhalaevd/Donatello.

dzhalaevd/Donatello

Guia de contribuição ao DeskcommCRM para quem vai mexer no código e abrir um pull request, sobretudo de um fork.

melgarafael/DeskcommCRM

Guide for creating, updating, and deprecating hybrid cloud RPC services in Sentry.

getsentry/sentry

Registers a new syncable entity in three NestJS modules and adds its service and GraphQL resolver layers when contributing to the Twenty server.

twentyhq/twenty

Build anything on Shopify. An agent skill from Shopify/Shopify-AI-Toolkit.

Shopify/Shopify-AI-Toolkit

Pure-web protocol reverse skill: turn hostile browser clients into browser-free Python collectors.

aoyunyang/spider-king-skill

Designs REST and GraphQL APIs including endpoints, error handling, versioning, and documentation.

CloudAI-X/claude-workflow-v2

Build new Arcade error adapters from scratch using public Arcade TDK patterns.

ArcadeAI/arcade-mcp

Write efficient GraphQL queries against the Phoenix API. An agent skill from Arize-ai/phoenix.

Arize-ai/phoenix

A skill your agent uses when reviewing a proposed REST or GraphQL API change before merge — checks contract clarity, backwards compatibility, errors, pagination, auth, and naming.

oxbshw/LLM-Agents-Ecosystem-Handbook

Create GitHub issues for cuga-agent (bugs, features, epics, designs, and related work) against origin using gh, with epic → feature → issue hierarchy and GraphQL sub-issue linking.

cuga-project/cuga-agent

Diagrams and checkable docs from a codebase. An agent skill from Raja0sama/vibex.

Raja0sama/vibex

Backend development guide for the Phoenix AI observability platform (Strawberry GraphQL, SQLAlchemy async, FastAPI).

Arize-ai/phoenix

Manage Linear issues via GraphQL API. An agent skill from letta-ai/lettabot.

letta-ai/lettabot

Resolve PR review feedback. An agent skill from gmickel/flow-next.

gmickel/flow-next

Read before adding or changing backend code in lightlystudio - FastAPI routes, services, resolvers, SQLModel tables, or database access.

lightly-ai/lightly-studio

Add a new boolean feature flag (dynamic config key) to cadence-web.

cadence-workflow/cadence-web

Apollo-Lite lint and formatting workflow. An agent skill from wheelos/apollo-lite.

wheelos/apollo-lite

Collect auditable public X/Twitter posts by controlling the user's already logged-in Chrome, searching X's rendered web interface, scrolling visible results, and extracting original post text and…

binggandata/bggg-skills

Design or review REST and GraphQL API interfaces. An agent skill from agulli/atlas-agents.

agulli/atlas-agents

Checklist for adding, changing, deprecating or removing Saleor GraphQL fields, mutations, enums and webhook event types so the change passes review first time.

saleor/saleor

Resolve PR review feedback — fetch unresolved threads, triage, dispatch per-thread resolver agents, validate, commit, reply + resolve via GraphQL.

gmickel/flow-next

GraphQL schema design and review. An agent skill from hackers-pub/hackerspub.

hackers-pub/hackerspub

Search and retrieve content from Product Hunt. An agent skill from ReScienceLab/opc-skills.

ReScienceLab/opc-skills

Scaffold Spikard projects and generate code from OpenAPI, AsyncAPI, OpenRPC, GraphQL, and Protobuf schemas using the Spikard CLI or its MCP server.

Goldziher/spikard

Load this skill before using the execute tool. An agent skill from jeremyosih/pi-executor.

jeremyosih/pi-executor

Operate any AR.IO node deployment — architecture, daily ops, diagnostics, and recurring pitfalls that apply to every operator.

ar-io/ar-io-node

Turn any API into a CLI command. An agent skill from ShawnPana/aurl.

ShawnPana/aurl

Add a new conflict-resolution pattern to GitWand core. An agent skill from devlint/GitWand.

devlint/GitWand

Build and iterate on an Apollo Connectors subgraph for a GraphOS supergraph from a REST API, with or without an OpenAPI or Swagger spec, in a dedicated git workspace that records what the API…

apollographql/skills

Review a GitHub pull request for a Rust codebase. An agent skill from apollographql/apollo-mcp-server.

apollographql/apollo-mcp-server

Guides REST and GraphQL API design, endpoint patterns, request/response schemas, versioning, and API best practices.

CloudAI-X/opencode-workflow

Read the HTTP and GraphQL calls a debug build of the Android app made, with request and response bodies, status codes, timings and errors, over adb.

HedvigInsurance/android

Proactive PII add-on — augments the main response with PII guidance.

goSprinto/compliance-skills

Write or improve KDoc for public APIs in retrofit-graphql. An agent skill from AniTrend/retrofit-graphql.

AniTrend/retrofit-graphql

在用户当轮明确授权后，只读导出其小红书收藏、抖音收藏或 X/Twitter 书签为本地链接文件；本 Skill 直接完成收藏页滚动、链接提取、去重、数量核验、Field Theory GraphQL-only 导出和抽样验证。用于“导出/备份/同步我的收藏或书签链接”等私人数据导出任务；不得用于公开搜索、收藏内容分析、媒体下载、正文归档、推荐发现或未获当轮授权的私人读取。

mcncarl/yichen-skills

Backend API design specialist. An agent skill from selmakcby/claude-agents-skills.

selmakcby/claude-agents-skills

Audit REST, GraphQL, and RPC APIs against the OWASP API Security Top 10 (2023).

briiirussell/cybersecurity-skills

A skill your agent uses when writing Playwright tests, fixing flaky tests, debugging failures, implementing Page Object Model, configuring CI/CD, optimizing performance, mocking APIs, handling…

sanity-io/sanity

Add a format-specific resolver to GitWand core. An agent skill from devlint/GitWand.

devlint/GitWand

Add a new chat channel's layer-2 dashboard onboarding — the connected-state "What's next" / "FOR YOUR USERS" developer-rollout guide plus its connected details page — in apps/dashboard, following…

novuhq/novu

Model data with @data-client schemas (Entity, EntityMixin, Collection, Union, Query, Values, All, Invalidate, Lazy, Scalar) for atomic, consistent, referentially-equal async data via normalization…

reactive/data-client

BigCommerce API expert for building integrations, apps, headless storefronts, and automations.

qdhenry/Claude-Command-Suite