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.

add-provider

265

cyanheads/mcp-ts-core

Skill Claude CodeCodex

Add a new storage or service provider to the core package. Use when implementing a new backend for StorageService (e.g., a new database) or a new service provider (e.g., a new LLM backend).

not rated 153 changed 1mo ago A SkillSpector: pass 47 tokens original Apache-2.0

unraid-mcp

266

dinglebear-ai/unraid

Plugin Claude Code

Bundles 1 skill, 1 MCP server · 109 tokens together

Query, monitor, and manage Unraid servers via GraphQL API through MCP tools. Supports system info, Docker, VMs, array/parity, notifications, plugins, rclone, and live telemetry.

not rated 150 +1 changed 17d ago A tokens not measured original MIT

email-best-practices

267

resend/email-best-practices

Skill Claude CodeCodex

Use when building email features, emails going to spam, high bounce rates, setting up SPF/DKIM/DMARC authentication, implementing email capture, ensuring compliance (CAN-SPAM, GDPR, CASL), handling webhooks, retry logic, making emails accessible (alt text, headings, contrast, screen readers), or deciding transactional…

not rated 147 +1 29d ago A 75 tokens

gdarko/laravel-vue-starter

Skill Claude CodeCodex

Apply this skill whenever writing, reviewing, or refactoring Laravel PHP code. This includes creating or modifying controllers, models, migrations, form requests, policies, jobs, scheduled commands, service classes, and Eloquent queries. Triggers for N+1 and query performance issues, caching strategies, authorization…

not rated 146 +1 7mo ago A 114 tokens

dodo-reach/hermes-link-curator

Skill Claude CodeCodex needs its repo

Maintain and debug the link-curator web dashboard (port 8090). Separate process from the official Hermes dashboard.

not rated 146 +1 5mo ago A 28 tokens original MIT

vinilana/invokta

Skill Codex

Add or change domain capabilities in this Invokta Action Engine with explicit contracts, authenticated access, engine-owned dependencies, migrations, and tests. Use when a user asks to add an action, tool, capability, domain behavior, repository operation, schema, or capability ID, or to expose behavior consistently…

not rated 146 +3 yesterday A SkillSpector: pass 81 tokens original MIT

elixir-architect

271

maxim-ist/elixir-architect

Skill Claude CodeCodex

Use when designing or architecting Elixir/Phoenix applications, creating comprehensive project documentation, planning OTP supervision trees, defining domain models with Ash Framework, structuring multi-app projects with path-based dependencies, or preparing handoff documentation for Director/Implementor AI…

not rated 145 11mo ago A 57 tokens original MIT

api-design

272

selmakcby/claude-agents-skills

Skill Claude Code

Backend API design specialist. Use when building REST/GraphQL APIs, designing endpoints, data models, or backend architecture. Covers RESTful principles, HTTP semantics, error handling, versioning, and OWASP-aligned security.

not rated 145 6mo ago A 48 tokens original MIT

nfeio-node-sdk

273

nfe/client-nodejs

Skill Claude CodeCodex

NFE.io Node.js SDK integration expert (package: nfe-io). MUST trigger when: code imports 'nfe-io' or references NfeClient; user mentions NFE.io, NFS-e, NF-e, CT-e, CF-e, CFe-SAT, nota fiscal, nota fiscal eletronica, Brazilian invoice, fiscal document, electronic invoice Brazil, CNPJ lookup, CPF lookup, service…

not rated 144 changed 21d ago A 264 tokens original MIT

mail-time

274

veliovgroup/mail-time

Skill Claude CodeCodex

Use when building, wiring, reviewing, or debugging MailTime and ostrio:mailer email queues for horizontally scaled Node.js, Bun, or Meteor apps. Trigger on MailTime, MongoQueue, RedisQueue, PostgresQueue, mailTimePreset, JoSk email scheduling, Redis Cluster / KeyDB Cluster / Valkey useHashTags, KeyDB…

not rated 143 changed 1mo ago A SkillSpector: warn 195 tokens original BSD-3-Clause

astrologer-api

277

g-battaglia/Astrologer-API

Skill Claude CodeCodex

Integrate the hosted Astrologer API through RapidAPI for SVG charts, astrology data, Moon phases, planetary hours and XML context. Use when writing or debugging clients for this service.

not rated 139 +2 changed 1mo ago A 42 tokens AGPL-3.0

aws-serverless-eda

278

CommandCodeAI/agent-skills

Skill Claude CodeCodex

AWS serverless and event-driven architecture expert based on Well-Architected Framework. Use when building serverless APIs, Lambda functions, REST APIs, microservices, or async workflows. Covers Lambda with TypeScript/Python, API Gateway (REST/HTTP), DynamoDB, Step Functions, EventBridge, SQS, SNS, and serverless…

not rated 139 +1 8mo ago A 112 tokens original MIT

pytdbot

279

pytdbot/client

Skill Claude CodeCodex

Write Telegram bots and userbots with Pytdbot (async TDLib wrapper with high-level helpers; not the Telegram Bot API). Use when the user works with Pytdbot, TDLib, or pytdbot.Client.

not rated 138 +1 changed 1mo ago A SkillSpector: warn 49 tokens original MIT

IgniteUI/igniteui-cli

Skill Claude Code

Identify and select the right Ignite UI Web Components for your app UI, then navigate to official docs, usage examples, and API references.

not rated 137 yesterday A SkillSpector: pass 34 tokens original MIT

fhir-mcp-server

282

wso2/fhir-mcp-server

MCP server Claude CodeCodexCursor +2

A Model Context Protocol (MCP) server that provides seamless, standardized access to Fast Healthcare Interoperability Resources (FHIR) data from any compatible FHIR server. Designed for easy integration with AI tools, developer workflows, and healthcare applications, it enables natural language and programmatic…

not rated 137 4d ago A tokens not measured original Apache-2.0

cometchat

283

cometchat/docs-mcp

Plugin Claude Code

Bundles 2 MCP servers

Add real-time chat, voice, video, and moderation to your app. Claude reads CometChat documentation, fetches reference pages, and pulls implementation bundles built from the current docs for common scenarios — React and Angular UI Kit quickstarts, Flutter, iOS, Android, React Native, the JavaScript SDK, the no-code…

not rated 137 +2 changed 17d ago A tokens not measured original Apache-2.0

airbyte-agent-sdk

284

airbytehq/airbyte-agent-sdk

Plugin Claude Code

Bundles 4 skills · 191 tokens together

Give your AI agents access to third-party APIs (Salesforce, HubSpot, GitHub, Slack, Stripe, Jira, Notion, Intercom, Zendesk, and more) through strongly typed, well-documented tools.

not rated 136 3d ago A tokens not measured

WaHaiLong/KingdeeMCP

Agent Claude Code

Lead of the Kingdee MCP Dev Squad. Coordinates WebAPI integration, MCP tool implementation, QA and PyPI release to fully cover the Kingdee OpenAPI (ApiDoc) interfaces inside kingdee-mcp.

not rated 136 +9 12d ago A 51 tokens original MIT

pnp/cli-microsoft365-mcp-server

MCP server Claude CodeCodexCursor +2

MCP server for CLI for Microsoft 365 to manage your tenant using natural language. Runs locally from the @pnp/cli-microsoft365-mcp-server npm package.

not rated 135 +1 4d ago A tokens not measured original MIT

convex

288

joachimchauvet/modernstack-saas

MCP server Claude CodeCodexCursor +2

Client for the Convex Cloud. Runs locally from the convex npm package.

not rated 134 +1 3mo ago A tokens not measured 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: