Backend and APIs skills

13,189 tagged Backend and APIs, measured the same way as everything else here.

Browse within: LLM 148agents 118skills 114agent 86agentic-ai 86api 82azure 68antigravity 66ai-coding 64claude-code-plugin 62cursor 54cli 53cybersecurity 53javascript 52

joeseesun/qiaomu-opencli-skills

Skill Claude CodeCodex needs its repo

A guide for creating OpenCLI adapters for websites. An adapter is code that lets a command-line tool communicate with a particular website’s interfaces and data.

not rated 997 +1 6mo ago A Socket: passSnyk: warnSkillSpector: warn 83 tokens original MIT

jongpie/NebulaLogger

Skill Claude CodeCodex

Use this skill when the user wants to add or update Nebula Logger instrumentation in Apex, LWC, Aura, Flow, or OmniStudio. Covers logging APIs, save patterns, record association, scenarios, tags, async transaction linking, and save method selection.

not rated 974 +2 yesterday A SkillSpector: warn 60 tokens original MIT

workflow-ai-coding

75

w8123/EnterpriseAgentFramework

Skill Claude CodeCodex

Edit, validate, debug, publish, and inspect ReachAI Workflow drafts through the Workflow AI Coding REST API. Use when asked to create or modify a workflow graph, add/update/delete nodes or edges, validate GraphSpec, dry-run or debug-run a workflow, inspect trace/run output, check release readiness, publish a validated…

not rated 974 +44 2d ago A SkillSpector: pass 85 tokens original MIT

postman-bundle

76

Pipelex/pipelex

Skill Claude Code

Turn a Pipelex MTHDS bundle into an API request against any bundle-shaped pipelex-api route — push it as a ready-to-run query into the live "Pipelex FastAPI" Postman collection, emit a curl command, execute it directly, or just preview the body. Covers the whole bundle surface: run (/v1/execute, /v1/start), dry-run…

not rated 949 +1 changed 3d ago B 331 tokens

Azure/azure-sdk-for-rust

Skill Claude Code ✓ vendor

Enforce consistent struct design conventions across sdk/cosmos crates. Validates visibility modifiers, field privacy, #[nonexhaustive] usage, and construction API patterns (Default/new with with setters, or optional separate builders with builder()/build()), and construction correctness on public structs. Can auto-fix…

not rated 886 +1 today A SkillSpector: pass 83 tokens original MIT

posthog

78

mereyabdenbekuly-ctrl/clodex-ide

Skill Claude CodeCodex

Complete guide for the PostHog plugin — REST API access for querying analytics with HogQL, managing feature flags, inspecting events and persons, reading insights, experiments, cohorts, surveys, and more.

not rated 870 5d ago A SkillSpector: warn 43 tokens AGPL-3.0

fastapi-guard

79

rennf93/fastapi-guard

Skill Claude CodeCodex

Production-ready security middleware for FastAPI. Use when adding IP filtering, rate limiting, per-route security decorators, route-resolution strict mode, global behavior rules, passive/log-only mode, or Guard Agent SaaS telemetry to a FastAPI app. Covers SecurityMiddleware setup, SecurityConfig tuning, and the…

not rated 825 changed 1mo ago A SkillSpector: pass 72 tokens original MIT

build-connector

80

getomnico/omni

Skill Claude Code

Build a new connector for Omni workplace agents. Use when creating a new data source integration, scaffolding connector structure, exposing agent actions/tools/resources, or needing help with the connector SDK.

not rated 808 +1 changed 1mo ago A SkillSpector: pass 41 tokens original Apache-2.0

starlette

81

simonw/research

Skill Claude CodeCodex

Build async web applications and APIs with Starlette 1.0, the lightweight ASGI framework for Python. Use this skill whenever a user wants to create an async Python web app, REST API, WebSocket server, or ASGI application using Starlette. Triggers include mentions of 'Starlette', 'ASGI', async Python web frameworks, or…

not rated 791 +5 3d ago A 163 tokens

menu-interactions

82

asmyshlyaev177/react-horizontal-scrolling-menu

Skill Claude CodeCodex

Wire mouse, wheel and touch input for react-horizontal-scrolling-menu: onWheel/onScroll are plain (api, event) => void callbacks, while ALL mouse/touch props (onMouseDown, onMouseUp, onMouseMove, onMouseLeave, onTouchStart, onTouchMove, onTouchEnd) are handler factories (api) => (event) => void. Covers mouse…

not rated 788 +1 changed 1mo ago A SkillSpector: pass 147 tokens original MIT

mindsdb/anton

Skill Claude CodeCodex

ONLY for writing backend or fullstack code BY HAND. NOT needed on the normal path — createartifact(fullstack-stateless-app or fullstack-stateful-app) followed by generateartifact writes the backend, verifies it by importing it and launches it. Recall this when editing an existing fullstack artifact, or when…

not rated 758 +2 changed 2d ago A SkillSpector: warn 130 tokens original MIT

x402

84

BillionsNetwork/verified-agent-identity

Skill Claude CodeCodex

Handle 402 Payment Required HTTP responses by executing payment and fetching the protected resource.

not rated 756 +1 1mo ago A 0 tokens

cloudflare

85

dmmulroy/cloudflare-skill

Skill Claude CodeCodex

Comprehensive Cloudflare platform skill covering Workers, Pages, storage (KV, D1, R2), AI (Workers AI, Vectorize, Agents SDK), networking (Tunnel, Spectrum), security (WAF, DDoS), and infrastructure-as-code (Terraform, Pulumi). Use for any Cloudflare development task.

not rated 726 9mo ago A Socket: warnSnyk: warn 68 tokens copy · 86% MIT

Snailclimb/AIGuide

Skill Codex

A set of conventions for writing, reviewing, refactoring and explaining Java and Spring Boot code. It covers common application layers such as controllers, services and data-access code, while allowing repository-specific rules to take priority.

not rated 710 +5 3mo ago A 144 tokens

kafka

87

opskat/opskat

Skill Claude CodeCodex

Manage Kafka topics, consumer groups, ACLs, schemas, connectors and messages via exec, using a family + verb + target command syntax.

not rated 701 +6 changed 18d ago A SkillSpector: pass 31 tokens GPL-3.0

tapcanvas-api

88

anymouschina/TapCanvas

Skill Claude CodeCodex

A single setup and command-line entry point for calling TapCanvas's public chat, drawing, image-understanding, video, task-result, and flow APIs.

not rated 688 +10 changed today A SkillSpector: pass 123 tokens original MIT

bb-sites

89

epiral/bb-sites

Skill Claude CodeCodex

A development guide for bb-sites, written partly in Chinese, with instructions for analysing and building sites around an API. API reverse engineering means observing how an existing service communicates so its requests can be understood.

not rated 636 2mo ago A 0 tokens

rails-conventions

90

rootstrap/rails_api_base

Skill Claude Code

Rootstrap Rails conventions. Use when writing, reviewing, or editing any Rails code — controllers, models, migrations, routes, views, mailers, initializers, locale files, or Rails config. Covers routing, ActiveRecord, migrations, i18n, time zones, mailers, assets, Bundler groups, and logging.

not rated 633 5d ago A SkillSpector: pass 71 tokens original MIT

card-endpoint-shape

91

LedgerHQ/ledger-live

Skill Claude CodeCodex

Read this before adding or editing an endpoint in domain/api/card-management/src/api.ts, a credential-bearing one included.

not rated 624 +1 changed 1mo ago A SkillSpector: pass 30 tokens original MIT

node-tools

92

sno-ai/mda

Skill Claude CodeCodex

Run a TypeScript script via tsx to fetch an HTTP endpoint and stream the response. Use when you need a small Node.js helper for HTTP calls.

not rated 622 +1 5mo ago A 34 tokens original Apache-2.0

nubase

93

OtterMind/Nubase

Skill Claude CodeCodex

Use when the user mentions Nubase broadly, wants a backend for an AI-generated app, or needs to deploy/publish generated code online — across Database, Auth, Storage, Assets (static frontend CDN), Functions (edge/serverless), AI Gateway, Memory, cron/scheduled jobs, Supabase-style REST/RLS, servicerole keys, or MCP.…

not rated 620 +1 1mo ago A SkillSpector: warn 92 tokens original Apache-2.0

owl-admin-app-dev

94

slowlyo/owl-admin

Skill Claude CodeCodex

Use this skill when developing an application that installed slowlyo/owl-admin, especially backend CRUD, menus, permissions, controllers, services, routes, config/admin.php, app/Admin, helper functions, settings(), adminpages(), AdminPipeline, upload/file preview issues, route conflicts, custom login/menu examples, or…

not rated 619 2d ago A SkillSpector: pass 114 tokens original MIT

api-reference

95

matrixorigin/memoria

Skill Claude CodeCodex

Memoria REST API endpoints, request/response formats, auth, rate limits. Use when calling or implementing API endpoints.

not rated 617 +2 3d ago A SkillSpector: warn 27 tokens original Apache-2.0

claude-api

96

andrew-kramer-inno/claude-code-source-build

Skill Claude CodeCodex

This skill helps you build LLM-powered applications with Claude. Choose the right surface based on your needs, detect the project language, then read the relevant language-specific documentation.

not rated 594 +1 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: