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.

effect

169

kitlangton/skills

Skill Claude CodeCodex

Opinionated guide for building production TypeScript applications with Effect v4. Use when implementing Effect workflows, services, layers, schemas, configuration, schedules, caches, streams, HTTP clients, or tests.

not rated 355 +3 changed 1mo ago A Socket: passSnyk: passSkillSpector: pass 42 tokens original MIT

wangmarket-dev

170

xnx3/wangmarket

Skill Claude CodeCodex

A project-specific guide for developing and maintaining wangmarket, a Chinese e-commerce platform, or projects with the same folder structure. It covers installation, running the project, templates, plugins, JSP/Spring Boot changes, and troubleshooting.

not rated 353 7d ago A 106 tokens

backend-api-architect

171

Dimillian/Claude

Agent Claude Code

Use this agent when you need to design and implement a backend API for a frontend application. This includes selecting the appropriate backend framework, designing RESTful or GraphQL endpoints, setting up database schemas, implementing authentication/authorization, and creating the server infrastructure. The agent…

not rated 352 1y ago A 0 tokens

afm

172

scouzi1966/maclocal-api

Skill Claude CodeCodex needs its repo

Maintain and extend AFM (maclocal-api), a Swift OpenAI-compatible local LLM server and CLI for Apple Foundation Models, MLX models, API gateway proxying, and Vision OCR. Use when working on AFM CLI commands (afm, afm mlx, afm vision), OpenAI /v1/chat/completions and /v1/models behavior, streaming SSE, tool-calling…

not rated 351 6d ago A SkillSpector: pass 114 tokens original MIT

aws-samples/serverless-samples

Skill Claude CodeCodex ✓ vendor

Transform OpenAPI specifications (Swagger 2.0, OpenAPI 3.0, 3.1) into Amazon API Gateway-compatible REST APIs. Orchestrates transform, validate, optionally deploy via AWS SAM, E2E test against live endpoints, and report unsupported features. Use when converting OpenAPI to API Gateway, importing a Swagger/OpenAPI spec…

not rated 349 +2 yesterday A SkillSpector: warn 109 tokens MIT-0

walkeros

174

elbwalker/walkerOS

Plugin Claude Code

Bundles 24 skills, 2 MCP servers · 995 tokens together

Skills and MCP tools for walkerOS - the open-source event data collection platform. Learn architecture, create sources/destinations/transformers, validate events, bundle flows locally, and manage projects and deployments through the hosted walkerOS MCP server.

not rated 349 +2 changed 22d ago A tokens not measured original MIT

lap

175

Lap-Platform/LAP

Skill Claude Code

LAP CLI -- compile, search, and manage API specs for AI agents. Use when working with API specifications (OpenAPI, GraphQL, AsyncAPI, Protobuf, Postman), compiling specs to LAP format, searching the LAP registry, generating skills from API specs, or publishing APIs. Commands: init, compile, search, get, skill…

not rated 347 +2 11d ago A SkillSpector: warn 89 tokens original Apache-2.0

setup-x-api

176

minicoohei/ai-agent-camp

Command Claude Code

A guided setup command for the X API, which lets software connect to X, formerly known as Twitter.

not rated 347 +2 1mo ago A 2 tokens

dr-jskill

177

jdubois/dr-jskill

Skill Claude CodeCodex

Creates Java + Spring Boot projects: Web applications, full-stack apps with Vue.js or Angular or React or vanilla JS, PostgreSQL, REST APIs, and Docker. Use when creating Spring Boot projects, setting up Java microservices, or building enterprise applications with the Spring Framework.

not rated 345 +2 changed yesterday A 59 tokens original Apache-2.0

login-with-chatgpt

178

opencoredev/login-with-chatgpt

Skill Claude CodeCodex

Integrate Login with ChatGPT (@opencoredev/loginwithchatgpt-): let users sign in with their own ChatGPT account and run AI requests against their ChatGPT plan. Use when adding ChatGPT account login, mounting createChatGPTHandler, rendering the LoginWithChatGPT React button or useLoginWithChatGPT hook, wiring…

not rated 342 +3 14d ago A SkillSpector: pass 101 tokens original MIT

openapi-to-skills

179

neutree-ai/openapi-to-skills

Skill Claude CodeCodex

Generate an Agent Skill from an OpenAPI 3.x file or URL using the openapi-to-skills CLI. Use when asked to convert an API specification into a skill or create API reference docs for on-demand loading.

not rated 342 23d ago A 50 tokens original Apache-2.0

claude-api

180

Ta0ing/claude-code_evil

Skill Claude CodeCodex

Use this skill when the user wants to build with the Claude API or Anthropic SDKs.

not rated 341 7mo ago A 0 tokens

moto-impl-strategy

182

robotocore/robotocore

Cursor rule Cursor

Strategy and learnings for implementing missing Moto operations.

not rated 334 changed 7d ago C 0 tokens original MIT

develop-disguise

183

cha0upup/LeoAI

Skill Claude CodeCodex

A specialised helper for creating or updating Disguises on a platform, including the code that changes and restores traffic data.

not rated 331 +5 changed 23d ago A 72 tokens GPL-3.0

add-command

184

Doist/todoist-cli

Skill Claude CodeCodex needs its repo

Guide for adding new CLI commands or subcommands to todoist-cli. Use when implementing new SDK endpoints, adding subcommands to existing command groups, or extending CLI functionality.

not rated 330 +2 changed today A SkillSpector: warn 37 tokens original MIT

shopify

185

johnson7788/MultiUserClaw

Skill Claude CodeCodex

Shopify Admin & Storefront GraphQL APIs via curl. Products, orders, customers, inventory, metafields.

not rated 328 +1 2mo ago A 26 tokens original MIT

DitriXNew/EDT-MCP

Skill Claude CodeCodex

Work with external data processor/report projects through EDT-MCP: metadata, forms, builds, and one-run debug launch. Not for prebuilt files outside an EDT project.

not rated 327 +2 changed 2mo ago A 43 tokens AGPL-3.0

KLR-Pattern/pydantic-resolve

Skill Claude Code

A three-stage development method for Python projects built with pydantic-resolve, starting with agreed data models and ending with application interfaces. It uses an ER diagram, which shows database entities and their relationships, plus ORM models that represent database records in code.

not rated 326 1mo ago A SkillSpector: pass 56 tokens original MIT

postman-mcp-server

188

postmanlabs/postman-mcp-server

MCP server Claude CodeCodexCursor +2 ✓ vendor

A basic MCP server to operate on the Postman API. Runs locally from the @postman/postman-mcp-server npm package. Needs 1 environment variable to run.

not rated 326 +1 7d ago A tokens not measured original Apache-2.0

neon

189

xai-org/plugin-marketplace

Skill Claude CodeCodex ✓ vendor

Overview of the Neon platform for apps and agents, spanning Postgres, Auth, Data API, and the new services: Object Storage, Compute Functions, and AI Gateway. Use whenever "Neon" is mentioned for an overview of how to work with Neon and how to get started. Otherwise, the individual capabilities are the triggers…

not rated 320 +4 yesterday A 138 tokens

apollo-mcp-server

190

apollographql/apollo-mcp-server

MCP server Claude CodeCodexCursor +2

MCP server "apollo-mcp-server" as configured in apollographql/apollo-mcp-server. Runs in Docker (ghcr.io/apollographql/apollo-mcp-server:canary-20260112T145439Z-114c866).

not rated 318 yesterday A tokens not measured original MIT

openapi

191

SaynaAI/sayna

Cursor rule Cursor

This document provides comprehensive guidelines for writing OpenAPI annotations in the Sayna Rust/Axum codebase using the utoipa crate.

not rated 317 +1 5mo ago A 5,255 tokens original Apache-2.0

aiocache

192

tedivm/robs_awesome_python_template

Skill Claude CodeCodex

Configure or use the aiocache caching layer. Use when: adding cache reads/writes, configuring cache backends, working with TTLs, enabling/disabling caching, or understanding the NoOpCache fallback pattern.

not rated 313 5mo ago A SkillSpector: pass 47 tokens original MIT

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: