12,495 tagged Backend and APIs, measured the same way as everything else here.
Browse within: agents 124LLM 117skills 113agent 95azure 80agentic-ai 78api 72claude-code-plugin 59antigravity 56cli 52sdk 51nextjs 50claude-code-skills 49cybersecurity 46
Skill Codex
Integrate and troubleshoot the @unprice/api TypeScript SDK in server-side Node.js, Next.js, Hono, or edge applications. Use when onboarding Unprice customers, checking access, enforcing or recording usage, reserving budgets for multi-step workloads, handling Unprice API results, reviewing an existing Unprice…
Skill Claude CodeCodex
Build full-stack applications with Supabase (PostgreSQL, Auth, Storage, Real-time, Edge Functions). Use when implementing authentication, database design with RLS, file storage, real-time features, or serverless functions.
SalesforceDiariesBySanket/Copilot-Skills-Salesforce
Skill Claude CodeCodex
Designs and architects Salesforce solutions using the Well-Architected framework (Trusted, Easy, Adaptable), Architect Decision Guides, and integration patterns. Use when the user mentions Salesforce architecture, solution design, org strategy, data modeling, integration patterns, multi-cloud design, Agentforce…
Skill Claude CodeCodex
Build, harden, and debug production MCP servers with the TypeScript SDK. Use when writing or reviewing an MCP server or its tools - picking a transport, designing tool schemas and results, handling errors, adding OAuth, cutting token bloat, or migrating SDK versions. Also covers MCP Apps, extensions, and the Registry.…
Skill Claude CodeCodex
Build web3 applications, scripts, CLIs, bots, mobile apps, and desktop apps that need blockchain data via the Blockscout PRO API — a single HTTP API spanning 100+ EVM chains. Invoke this skill whenever the user wants to read blockchain data over HTTP (transactions, blocks, addresses, tokens, NFTs, logs, contract…
Skill Claude CodeCodex
Codex App Fast proxy and auth-split for third-party OpenAI-compatible APIs. Supports Sign in with ChatGPT, priority servicetier, Responses API benchmark, enable/check/update/uninstall.
Skill Claude CodeCodex
FlowLLM repository development guidance. Use when working in the flowllm codebase to implement, debug, test, review, or document FlowLLM runtime behavior, including CLI/client calls, services, application wiring, jobs, steps, components, configuration, streaming, registry registration, and tests.
aligundogdu/symfony-hexagonal-skill
Skill Claude CodeCodex
Symfony Doctrine persistence — repository adapters, entity mapping, migrations, transactions, database patterns. Triggers on: doctrine, repository, persistence, database, mapping, migration, ORM, entity manager, DBAL, transaction.
Skill Claude CodeCodex
Expert SurrealDB 3 architect and developer skill (tracks v3.1.4+). SurrealQL mastery, multi-model data modeling (document, graph, vector, time-series, geospatial), schema design, security, deployment, performance tuning, SDK integration (JS, Python, Go, Rust, Java, .NET, C, PHP, Swift, Kotlin, Ruby), Surrealism WASM…
mrlm-xyz/demo-claude-marketplace
Skill Claude Code
Project-knowledge skill for orders-api. The order lifecycle, invariants, and money handling specific to this codebase. Loads when working on order logic in this service.
algorand-devrel/algorand-agent-skills
Skill Claude CodeCodex
Builds x402 HTTP-native payment applications on Algorand using TypeScript. Covers clients (fetch, axios), servers (Express, Hono), facilitators, paywalls, Next.js integration, and the @x402/core library. Use when implementing x402 payment flows in TypeScript, creating payment-gated APIs, building x402 facilitators or…
Skill Claude CodeCodex
Helps agents develop, review, test, secure, optimize, design, integrate, package, and release modern WordPress plugins. Use for WordPress plugin architecture, Gutenberg block work, block.json, REST API, WP admin screens, shortcode implementation, Settings API, WP-CLI workflows, PHPUnit tests, wp-env environments…
saeed-vayghan/gemini-agent-skills
Skill Claude CodeCodex
Expertise in auditing and testing API endpoints. Use when the user asks to "check", "test", or "audit" a URL or API.
KhaledSaeed18/node-express-boilerplate
Skill Claude CodeCodex needs its repo
Scaffold unit and integration tests for an existing resource or service. Use when the user asks to add tests, write tests, or improve test coverage for a specific resource, service, controller, or route.
ocbunknown/fastapi-claude-template
Skill Claude Code
Use when integrating an external HTTP API (Stripe, GitHub, Twilio, a payment provider, etc.) into the project. Enforces the Client + Service split — Client lives in infrastructure and returns raw vendor-shaped Pydantic responses, Service lives in application and maps raw responses to application Result types. Covers…
Skill Claude CodeCodex
Backend architecture patterns, API design, database optimization, and server-side best practices for Node.js, Express, NestJS, FastAPI, and Next.js API routes.
Skill Claude CodeCodex
SwiftMesh uses a builder pattern on the Mesh class. Every configuration method returns Self, enabling fluent chaining. The flow is.
TencentCloudBase/cloudbase-skills
Skill Claude CodeCodex
Development guidance for CloudBase, Tencent Cloud's backend platform for web, mobile, and WeChat Mini Program applications.
advancedcommunities/salesforce-mcp-server
Skill Claude CodeCodex
Use when working with Salesforce orgs — executing Apex, writing SOQL/SOSL, managing records, running tests, deploying metadata, or analyzing code. Guidance for the Salesforce MCP Server's tools, prompts, and resources.
Skill Claude CodeCodex
Configure multi-tenant organizations, manage members and invitations, define custom roles and permissions, set up teams, and implement RBAC using Better Auth's organization plugin. Use when users need org setup, team management, member roles, access control, or the Better Auth organization plugin.
claude-dev-suite/claude-dev-suite
Skill Claude Code
Spring Mail for sending emails in Spring Boot 3.x. Covers JavaMailSender, SimpleMailMessage, MimeMessage, HTML emails, attachments, templates (Thymeleaf/FreeMarker), async sending, and testing. USE WHEN: user mentions "spring mail", "JavaMailSender", "email Spring Boot", "send email", "MimeMessage", "email templates"…
Skill Claude CodeCodex
Answer questions about the ACME oneM2M CSE open source project — installation, configuration, runtime options, protocol bindings, plugins, scripting, and development. Use this skill whenever the user asks anything about ACME CSE, oneM2M, acmecse, acme.ini, CSE setup, or running/configuring the ACME middleware, even if…
Skill Claude CodeCodex
Secure API proxy that stores credentials encrypted and injects auth server-side. Use when: (1) making any external API call — "call the Stripe API", "enrich my data [from PeopleDataLabs]", "create an image [using Nano Banana API]", "use a [RapidAPI service]", (2) the user shares an API key, token, or secret — "here's…
Skill Codex
Write and maintain Apifox/OpenAPI documentation through the apifox-cli Go CLI. Use when Codex needs to read source code, routes, DTOs, validation rules, or product requirements; author .apifox-docs.json, .apifox-endpoint.json, .apifox-crud.json, or .apifox-schema.json; validate and dry-run them; apply them to Apifox…
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: