Backend and APIs

18,757 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.

api-design-guidelines

1585

daibang123a/golang-agent-skills

Skill Claude CodeCodex

Review Go HTTP API code for compliance with REST best practices, security, and performance. 80+ rules covering routing, middleware, validation, auth, and observability. Use when building or reviewing Go web services, HTTP handlers, REST APIs, or middleware chains. Triggers: "Review my API", "Check API security"…

not rated 2 6mo ago A 80 tokens original MIT

idempiere-api

1587

nczz/idempiere-api

Plugin Claude Code

Bundles 5 skills, 9 commands · 383 tokens together

A helper for developing and testing iDempiere REST APIs. iDempiere is an open-source business software system, and REST APIs let other programs communicate with it over the web.

not rated 2 7mo ago A tokens not measured

hookdeck

1589

hookdeck/claude-channel-plugin

Plugin Claude Code

Bundles 1 hook, 1 MCP server

Bridge webhooks from Hookdeck Event Gateway into Claude Code sessions as channel events. Receive GitHub, Stripe, CI, and monitoring webhooks — Claude reacts to them automatically.

not rated 2 5mo ago A tokens not measured

arktype

1590

eralmansouri/arktype-claude-plugin

Skill Claude CodeCodex

Runtime TypeScript validation library with 1:1 type syntax. Use when creating validators, parsing data, or working with ArkType schema definitions using type().

not rated 2 7mo ago A 34 tokens original MIT

carsxe

1591

carsxe/carsxe-claude-plugin

Plugin Claude Code

Bundles 16 skills, 17 commands · 789 tokens together

CarsXE vehicle data APIs — decode VINs, look up license plates, get market values, history, recalls (VIN, YMM, or batch), YMM options, ownership, lien and theft, OBD codes, and more.

not rated 2 changed 2d ago A tokens not measured original MIT

mcpconnect

1592

delphi-blocks/claude-plugins

Plugin Claude Code

Bundles 1 skill · 206 tokens together

Build MCP servers in Delphi with MCPConnect: create a new server (stdio, WebBroker or Indy), add tools, resources, templates, App UIs and prompts, and set up sessions, notifications and OAuth security.

not rated 2 28d ago A tokens not measured original MIT

roic-api-v2

1596

roicai/agents-plugin

Skill Claude CodeCodex

Guides correct, budget-efficient use of the legacy roic.ai v2 REST API (https://api.roic.ai/v2) — query-string API-key auth, the symbol/CIK/CUSIP/ISIN identifier model, ticker and reference lookups, company profile/news/logo, earnings-call transcripts, the 11 fundamentals routes (statements, ratio groups, enterprise…

not rated 2 1mo ago A 216 tokens original MIT

muhkoo-app-builder

1597

muhkoo/builder

Plugin Claude Code

Bundles 1 skill · 125 tokens together

Describe an app idea in plain language and build it end-to-end on Muhkoo: provision the backend (app key, database tables, channels, agents, serverless functions), scaffold a Vite + React client against @muhkoo/connect, verify it with a live Cypress suite, give it a responsive distinctive design, and host it at .

not rated 2 2mo ago A tokens not measured original MIT

leon-api-tools

1598

leonaero/leon_software_marketplace

Plugin Claude Code

Bundles 3 skills · 161 tokens together

Claude Code skills for working with the Leon Aviation API — write validated GraphQL queries, design integration architectures, and generate integration guides.

not rated 2 2mo ago A tokens not measured original Apache-2.0

ampeco-public-api

1599

ampeco/claude-code-ampeco-public-api-skill

Skill Claude Code

Explore AMPECO Public API endpoints, schemas, and develop integrations with the EV charging platform. Use for API exploration, building integrations, or understanding available endpoints. Trigger keywords: "ampeco api", "public api", "ev charging api", "ampeco integration".

not rated 2 5mo ago A 65 tokens original MIT

wordpress-developer

1600

umutsevimcann/wordpress-developer-skills

Skill Claude CodeCodex

WordPress theme and plugin development expert. This skill is triggered when users mention WordPress, theme, plugin, Gutenberg, WooCommerce, hook, shortcode, wpenqueue, addaction, addfilter, or related terms.

not rated 2 9mo ago A 48 tokens original MIT

real-time-backend

1601

get-convex/real-time-backend-skill

Skill Claude CodeCodex

Build reactive, type-safe, production-grade backends. ALWAYS use this skill when the user asks to build, plan, design, or implement backend features, APIs, data models, server logic, database schemas, web apps, full stack apps, or mobile apps. This includes planning and architecture discussions — invoke this skill…

not rated 2 7mo ago A 74 tokens

taffy

1603

CFCommunity/llm-marketplace

Plugin Claude Code

Bundles 1 skill · 66 tokens together

Taffy REST API framework skills for building and maintaining Taffy-powered REST APIs.

not rated 2 7mo ago A tokens not measured

fastmcp-gateway

1604

Ultrathink-Solutions/fastmcp-gateway

MCP server Claude CodeCodexCursor +2

Progressive tool discovery gateway for MCP, built on FastMCP. Runs locally from the fastmcp-gateway Python package.

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

ThiagoGuislotti/copilot-instructions

Skill Claude Code

Extend dev-software-engineer with .NET/C# backend specialization for Clean Architecture, CQRS, EF Core, and production-ready API practices. Use when tasks involve ASP.NET endpoints, handlers, services, dependency injection, MediatR, migrations, or backend performance/resilience.

not rated 2 2mo ago A 64 tokens original MIT

add-a-source

1607

mayai-it/bandiradar

Skill Claude CodeCodex

Add a new funding-opportunity source adapter to BandiRadar (e.g. a regional bandi portal, a national incentives feed, an OCDS endpoint). Use when the user wants to integrate a new data source, write a Source adapter, map a raw payload into the canonical Opportunity model, or contribute a regional/sector source.…

not rated 2 2mo ago A 87 tokens original MIT

twilio-manager-mcp

1608

errajibadr/twilio_manager_mcp

MCP server Claude CodeCodexCursor +2

Twilio Manager MCP connects Claude AI or any host to Twilio through the Model Context Protocol (MCP). Runs locally from the twilio-manager-mcp Python package.

not rated 2 10mo ago A tokens not measured

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: