12,513 tagged Backend and APIs, measured the same way as everything else here.
Browse within: agents 160skills 141LLM 111agent 90azure 80agentic-ai 77api 71claude-code-plugin 61ai-coding-agent 58antigravity 54sdk 51nextjs 50claude-code-skills 49cli 48
Skill Claude CodeCodex
Use when asked to check, audit, or review a web application's security, authentication, permissions, access control, error handling, API/endpoint surface, or database management — including "is my app secure", "check my auth", "review my permissions", "find vulnerabilities", or a pre-launch/pre-handover review.
Skill Claude CodeCodex
Add x402 payment protection to any API endpoint using @dexterai/x402/server. Trigger when the user wants to monetize an API, add a paywall, accept crypto payments on their server, set up Stripe settlement, configure dynamic pricing, create access passes, or enable sponsored access (ads for agents).
Skill Claude CodeCodex
Assess coupling with the Balanced Coupling model (integration strength, distance, volatility). Use when judging whether coupling is balanced or risky, scoring the couplingbalance dimension, or deciding what to flag as structural risk. Highest risk is high strength + high distance + high volatility together. NOT…
SpillwaveSolutions/using-firebase
Skill Claude Code
Comprehensive Firebase development guidance for GCP-hosted applications. Covers Firestore database operations (CRUD, queries, transactions, data modeling), Cloud Functions (1st and 2nd generation, TypeScript and Python, all trigger types), Firebase CLI operations, emulator setup and data persistence, security rules…
Skill Claude CodeCodex
Expert Omeka S developer assistant for Docker-based installations. Covers theme development (SCSS/CSS, templates), module creation (PHP, events, database), configuration management, and troubleshooting. Use for Omeka S customization from simple CSS tweaks to advanced module development.
oquidave/production-ready-agent-skills
Skill Claude CodeCodex
Send an SMS via the Africa's Talking SMS API. Use whenever the user wants to send a text message, alert, OTP, notification, "send SMS to ", or any phrasing that involves delivering a short message to a mobile phone in Africa. The skill posts to Africa's Talking's REST endpoint and returns the delivery status.
Skill Claude CodeCodex
Guide agents through the OutboundSync API v1: auth, scopes, Sources vs destinations vs Sync Monitoring Webhooks vocabulary, discovery, and which specialized skill to run. Use when the user asks how to use the OutboundSync API, what their API key can access, which endpoint to call, OpenAPI discovery, account vs…
Skill Claude CodeCodex
Reference for litd (Lightning Terminal) gRPC API in Go: managing accounts, baking macaroons, listing payments, and creating LNC sessions.
grasscaograss/AwesomeWeldoneSkills
Skill Claude CodeCodex
A reference guide to the ModelBase finite-state machine, a program structure that moves through named states when events occur. It documents the states, transitions, workflow data, services, and execution flow for the system.
Skill Claude CodeCodex
Guidelines for working with the Clarify CRM API - includes authentication, endpoints, pagination, filtering, and CRUD operations for records.
Skill Claude CodeCodex
This skill should be used when the task involves design and manage ERP APIs -- use when building REST endpoints, versioning strategies, rate limiting, webhook systems, error handling, and developer experience for enterprise platform APIs.
Skill Claude CodeCodex
Review backend code that integrates with external/third-party APIs (payment providers, banks, KYC, card networks, crypto exchanges, SMS/OTP, any outbound HTTP/gRPC to a system you do not own). Checks planning of failure modes, idempotency, timeout and retry strategy, response code classification, duplicate-transaction…
Skill Claude CodeCodex
Build integrations with Snippe (api.snippe.sh), a Tanzania payment processing API. Use this skill whenever the user mentions Snippe, is working on payment integrations for Tanzania (mobile money via M-Pesa, Airtel Money, Mixx by Yas, Halotel; credit/debit cards via Visa/Mastercard; dynamic QR codes), needs to accept…
Skill Claude Code
Implement authentication and authorization in web applications. Use when adding login, signup, sessions, JWT tokens, OAuth, SSO, API key auth, role-based access control (RBAC), permissions, protected routes, middleware guards, password hashing, MFA/2FA, refresh token rotation, CSRF protection, or integrating auth…
Skill Claude Code
Use when writing Python code that imports from inkbox, uses pip install inkbox, or when adding email, phone, or agent identity features using the Inkbox Python SDK.
Ahmustufa/nestjs-best-practices-skill
Skill Claude CodeCodex
NestJS expert best practices for writing, reviewing, or refactoring NestJS code. Triggers on tasks involving NestJS modules, controllers, services, DTOs, guards, interceptors, TypeORM entities, authentication, configuration, or performance patterns.
Skill Claude CodeCodex
You are an expert at building applications with the Anthropic Claude API. Help the user write correct, idiomatic code using the latest API patterns and SDK conventions.
Skill Claude CodeCodex
Build, debug, and optimize Claude API / Anthropic SDK apps. Apps built with this skill should include prompt caching. Also handles migrating existing Claude API code between Claude model versions (4.5 → 4.6, 4.6 → 4.7, retired-model replacements). TRIGGER when: code imports anthropic/@anthropic-ai/sdk; user asks for…
MCKRUZ/intent-driven-development
Skill Claude Code
Add a new endpoint / route / use case / service the way this Node + TypeScript codebase already does it. Use when building an API surface, a request handler, a validator, a port/adapter, or a container registration in a Node/TypeScript repo. Finds the one canonical example and mirrors its layering, validation, error…
Skill Claude CodeCodex
Best practices for building with the Perigon News Intelligence API. Use this skill when searching or filtering news articles, tracking evolving stories, generating AI-powered summaries, performing semantic vector search over news or Wikipedia, querying people, companies, journalists, or sources databases, or…
luqiang-code/claude-code-skills
Skill Claude Code
Add consistent error handling to API routes. Creates standardized error responses, logging, and error classes. Triggers on "add error handling", "error handling", "standardize errors".
Skill Claude CodeCodex
Scaffold a production-ready REST API endpoint with CRUD operations, input validation, error handling, rate limiting, and test skeletons. Supports Express and Fastify.
Skill Claude CodeCodex
House conventions for writing code in a Django codebase: formatter and linter compliance (black, isort, djlint, flake8), imports at module top with real refactors for circular imports, docstrings over comment blocks, maintained libraries over hand-rolled code, full test coverage as a merge gate, N+1 queries caught at…
Skill Claude CodeCodex
Skill "skills" from bybit-exchange/pay-docs, covering bybit pay — ai integration skill, products overview, authentication (both products), required headers and signature construction.
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: