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.

latchkey

289

imbue-ai/latchkey

Skill Claude CodeCodex

Interact with third-party or self-hosted services (Slack, Google Workspace, Dropbox, GitHub, Linear, Coolify...) using their HTTP APIs on the user's behalf.

not rated 132 changed 6d ago A SkillSpector: warn 38 tokens original MIT

avrotize

290

clemensv/avrotize

MCP server Claude CodeCodexCursor +2

Tools to convert from and to Avro Schema from various other schema languages. Runs locally from the avrotize Python package.

not rated 132 4d ago A tokens not measured original Apache-2.0

victorGPT/vibeusage

Skill Claude CodeCodex

Use when designing or reviewing a backend MVP with tight budget, evolving schema, and reliance on third-party backends where idempotency, replay, and responsibility attribution are high-risk.

not rated 130 3mo ago A SkillSpector: pass 43 tokens original MIT

django-patterns

292

deepelementlab/clawcode

Skill Claude CodeCodex

Django architecture patterns, REST API design with DRF, ORM best practices, caching, signals, middleware, and production-grade Django apps.

not rated 126 5mo ago A 32 tokens GPL-3.0

spikard

294

Goldziher/spikard

Plugin Claude Code

Bundles 1 skill, 1 MCP server · 67 tokens together

Generate HTTP applications, schema handlers and fixtures using Spikard's local CLI and MCP server.

not rated 124 3d ago A tokens not measured original MIT

system-design-skills

295

proyecto26/system-design-skills

Plugin Claude Code

Bundles 22 skills, 1 command, 1 agent · 3,248 tokens together

A divide-and-conquer wiki of system-design skills. Reason about a design problem one part at a time -- requirements, capacity, APIs, storage, caching, load balancing, messaging, consistency, resilience, delivery, and scaling -- each with generic recipes, cloud-provider variants (AWS/Azure/GCP/Temporal), explicit trade.

not rated 123 +5 10d ago A tokens not measured original MIT

security-convex

296

IgorWarzocha/Opencode-Workflows

Skill OpenCode

Review Convex security audit patterns for authentication and authorization. Use for auditing query/mutation auth, row-level security, and validators. Use proactively when reviewing Convex apps (convex/ directory present). Examples: user: "Audit these Convex mutations" → check for missing ctx.auth and input validators…

not rated 122 9mo ago A 141 tokens archived

lsp-design

298

revfactory/claude-code-harness

Skill Claude Code

A guide to implementing a Language Server Protocol (LSP) server, the software that gives code editors features such as completion, diagnostics, and definition lookup.

not rated 122 8mo ago A 42 tokens

Auth0

299

auth0/auth0-mcp-server

Plugin Gemini CLI ✓ vendor

Manage your Auth0 tenants, apps and APIs.

not rated 122 3d ago A tokens not measured original MIT

holon-run/uxc

Skill Codex

Operate Binance Spot market, account, and order APIs through UXC with a curated OpenAPI schema, Binance query signing, and separate mainnet/testnet link flows.

not rated 119 1mo ago A SkillSpector: pass 42 tokens original MIT

datapages-server

301

romshark/datapages

Skill Claude CodeCodex

Configure the Datapages server entry point: NewServer type arguments, the message broker, server options, static assets, TLS and Prometheus metrics.

not rated 119 +3 changed 7d ago A 35 tokens original MIT

cds-mcp

302

cap-js/mcp-server

Plugin Claude Code

Bundles 2 MCP servers

Model Context Protocol (MCP) server for AI-assisted development of CAP applications.

not rated 118 changed 10d ago A tokens not measured original Apache-2.0

elixir-new-project

304

elixir-vibe/pi-elixir

Skill Claude CodeCodex

Create or bootstrap an Elixir/Phoenix project or package with Igniter and VibeKit. Use only for new-project generation or applying initial quality/tooling setup; use elixir for an existing backend project and elixir-web for existing UI/frontend work.

not rated 116 1mo ago A 57 tokens

mcp-dart-server

305

leehack/mcp_dart

Skill Claude CodeCodex

Use when building or extending a Model Context Protocol (MCP) server in Dart with mcpdart: structuring the project, creating an McpServer, adding tools, resources, resource templates or prompts, returning tool results and errors, reporting progress, running over stdio, or testing the server.

not rated 116 +1 4d ago A 68 tokens original MIT

vvip-educare

306

zhangdszq/teamclaw

Skill Claude CodeCodex

POST https://api.zoom.us/v2/users/me/meetings Authorization: Bearer {accesstoken}.

not rated 113 7mo ago A 0 tokens original Apache-2.0

neon

307

neondatabase/agent-skills

Plugin Claude Code ✓ vendor

Bundles 7 skills · 1,385 tokens together

Manage your Neon backend with the Neon agent skills and the Neon MCP Server: Lakebase Postgres, Managed Better Auth, Realtime, Object Storage, Functions, the Data API, and AI Gateway.

not rated 112 +4 changed yesterday A tokens not measured original Apache-2.0

route-tester

308

blencorp/claude-code-kit

Skill Claude CodeCodex

Framework-agnostic HTTP API route testing patterns, authentication strategies, and integration testing best practices. Supports REST APIs with JWT cookie authentication and other common auth patterns.

not rated 111 11mo ago A 36 tokens original MIT

wsimmonds/claude-nextjs-skills

Skill Claude Code

Guide for advanced Next.js App Router patterns including Route Handlers, Parallel Routes, Intercepting Routes, Server Actions, error boundaries, draft mode, and streaming with Suspense. CRITICAL for server actions (action.ts, actions.ts files, 'use server' directive), setting cookies from client components, and form…

not rated 110 +1 1y ago A 111 tokens original MIT

supabase

310

agentopology/agentopology

MCP server Claude CodeCodexCursor +2

One of 2 in .mcp.json

Supabase CLI. Runs locally from the supabase npm package.

not rated 107 +1 4d ago A tokens not measured original Apache-2.0

django-fastapi-expert

311

travisjneuman/.claude

Agent Claude Code

Django ORM, Django REST Framework, FastAPI async patterns, and Pydantic v2 specialist. Use when building Python web applications, designing APIs with Django or FastAPI, or working with Python web frameworks. Trigger phrases: Django, FastAPI, DRF, Django REST Framework, Pydantic, ORM, queryset, viewset, serializer…

not rated 107 +1 yesterday A 86 tokens original MIT

claude-api

312

OrcaWhisper/Claude-Code

Skill Claude CodeCodex

Use this skill when the user is building against Anthropic APIs or SDKs, including @anthropic-ai/sdk, anthropic, or Agent SDK integrations.

not rated 106 7mo ago A 0 tokens

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: