Backend and APIs

18,746 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.

402index

1297

ryanthegentry/402index-mcp-server

MCP server Claude CodeCodexCursor +2

MCP server for 402 Index — search 15,000+ paid API endpoints across L402, x402, and MPP protocols with real-time health monitoring. Runs locally from the @402index/mcp-server npm package.

not rated 3 4mo ago A tokens not measured original MIT

api-designer

1298

zacklecon/claude-skills

Skill Claude CodeCodex

Use when designing REST or GraphQL APIs, creating OpenAPI specifications, or planning API architecture. Invoke for resource modeling, versioning strategies, pagination patterns, error handling standards.

not rated 3 2d ago A 39 tokens original MIT

Lehsqa/robyn-config-skills

Skill Codex

Robyn backend scaffolding and architecture guidance for projects using robyn-config. Use when creating or evolving Robyn services, choosing DDD vs MVC, choosing SQLAlchemy vs Tortoise, adding entities with robyn-config add, scaffolding admin panel with robyn-config adminpanel, adding observability stack with…

not rated 3 4mo ago A 96 tokens

swagger-to-mcp

1300

mcp-com-ai/api-to-mcp-skills

Skill Claude Code

Convert OpenAPI v3 specifications into MCP servers using HAPI CLI. Supports local, Docker, and Cloudflare Workers deployment. Zero code required. Use when you need to expose API functionality as MCP tools or deploy API-based services to multiple hosting platforms.

not rated 3 7mo ago C 55 tokens original MIT

Backend Developer

1302

TheSethRose/Copilot-Skills

Agent Claude Code

Senior backend engineer specializing in scalable API development and microservices architecture. Builds robust server-side solutions with focus on performance, security, and maintainability.

not rated 3 9mo ago A 32 tokens original MIT

overview

1303

jkaninda/okapi-skills

Skill Claude CodeCodex

Skill "overview" from jkaninda/okapi-skills, covering okapi overview, project structure, core types, constructors and app configuration.

not rated 3 27d ago A 0 tokens original MIT

ddia-principles

1304

satbirbhbc-ux/ai-coding-principles

Skill Claude CodeCodex

Designing Data-Intensive Applications (DDIA) distilled reference guide by Martin Kleppmann. MUST be loaded when: designing database schemas, choosing storage engines, implementing replication or partitioning, handling distributed transactions, building batch/stream processing pipelines, choosing consistency models…

not rated 3 yesterday A 185 tokens copy · 100% MIT

okyline

1306

Okyline/Okyline-skill

Skill Claude CodeCodex

Expert assistant for the Okyline schema language — create, edit, and convert JSON validation schemas using declarative, example-driven syntax with inline constraints.

not rated 3 3mo ago A 34 tokens original Apache-2.0

app-dev

1307

iwritec0de/app-dev

Plugin Claude Code

Bundles 17 skills, 11 commands, 4 agents, 3 hooks · 2,429 tokens together

Full-stack Next.js development: App Router patterns, TypeScript engineering, Supabase/PostgreSQL/MySQL database integration, Prisma ORM, API design and scaffolding, authentication and authorization, Framer Motion animations, quality gate enforcement, and security scanning.

not rated 3 4mo ago A tokens not measured original MIT

mockapi

1308

devctllabs/mockapi

Skill Codex

Create stateful TypeScript/Hono mock API servers from OpenAPI 3.0/3.1 contracts. Use for building OpenAPI-based mock APIs, creating or repairing .mockapi sidecars, validating mock profiles, generating admin state endpoints, or freeform requests such as "mockapi build a mock server for api/openapi.yaml".

not rated 3 7d ago A 72 tokens original Apache-2.0

odoo-19.0

1310

Immoderate-humulin783/odoo-skills

Skill Claude CodeCodex

Odoo 19 development knowledge base with 18 specialized guides covering Actions (ir.actions., cron jobs, server actions), Controllers (HTTP routing, endpoints, auth types), Data files (XML/CSV records, shortcuts, noupdate), API Decorators (@api.depends, @api.constrains, @api.ondelete, @api.onchange, @api.model…

not rated 3 yesterday A 345 tokens

hydro-plugin-handler

1311

gtn1024/hydro-dev-skills

Skill Claude CodeCodex

Comprehensive guide to HTTP request handling and WebSocket connections in Hydro plugins. Covers route registration, handler lifecycle, parameter decorators, response building, operations, the @requireSudo security decorator, WebSocket handlers, and inheritance patterns.

not rated 3 1mo ago A 51 tokens

greybeard

1312

ManojLingala/greybeard

Skill Claude CodeCodex

Makes your AI agent defensive about the backend failure modes that page you at 3am. Before writing server-side code, the agent stops at a ladder of hard-won rules — money as integer minor-units, idempotent mutations, timeouts and backoff on every external call, explicit transaction boundaries, no N+1 queries…

not rated 3 2mo ago A 109 tokens original MIT

cursorrules

1313

Wittlesus/cursorrules-pro

Cursor rule Cursor

You are an expert backend API developer. Follow these rules strictly for REST APIs, GraphQL servers, and microservices.

not rated 3 6mo ago A 977 tokens

rules-quarkus

1314

kinhluan/rules-quarkus-skills

Skill Claude CodeCodex needs its repo

Expert knowledge for building Quarkus applications with Bazel using the rulesquarkus build system. Use when user asks about Quarkus+Bazel builds, augmentation, or troubleshooting.

not rated 3 3mo ago A 42 tokens original MIT

qapla-api

1315

Qapla/qapla-api-skill

Cursor rule Cursor

Integrate with or answer questions about the Qapla' shipping & tracking REST API (public v1.3). Use this when working with Qapla' to push shipments or raw orders, generate and confirm carrier labels, track parcels, get real-time multi-carrier quotes, look up pickup points (PUDO), verify addresses, list couriers and…

not rated 3 8d ago A 112 tokens original MIT

fellyph/ai-instructions

Skill Claude CodeCodex

Guide for creating WordPress Playground Blueprint JSON files and executing WP-CLI commands. Use when building Blueprint files, automating WordPress/WooCommerce management via CLI, configuring WordPress Playground environments, or troubleshooting. Covers blueprint creation, WP-CLI commands, and WooCommerce CLI…

not rated 3 7mo ago A 80 tokens

api-design

1317

hly-AI/codingplan

Cursor rule Cursor

A set of rules for designing back-end APIs, including REST conventions, versioning, and error formats.

not rated 3 7mo ago A 17 tokens

api

1319

SymKit/bundles-rules

Cursor rule Cursor

Symfony native API: MapRequestPayload, MapQueryString, Serializer groups, RFC 7807 (bundle controllers).

not rated 3 5mo ago A 0 tokens

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