Backend and APIs skills

14,477 tagged Backend and APIs, measured the same way as everything else here.

Browse within: skills 111azure 81api 71antigravity 61claude-code-plugin 59ai-coding 54sdk 51claude-code-skills 49aws 46cybersecurity 46foundry 45javascript 42ai-coding-agent 41bug-bounty 40

create-bubble

73

bubblelabai/BubbleLab

Skill Claude Code

Create a new Bubble integration for Bubble Lab following all established patterns and best practices from CREATEBUBBLEREADME.md.

not rated 1.1k +1 4mo ago A 27 tokens original Apache-2.0

build-error-adapter

74

ArcadeAI/arcade-mcp

Skill Claude Code

Build new Arcade error adapters from scratch using public Arcade TDK patterns. Use when adding provider integrations, mapping SDK exceptions, or extending HTTP/GraphQL/auth adapter behavior.

not rated 1.0k +7 yesterday A 39 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 958 +1 today A 60 tokens original MIT

taste

76

TryCaspian/caspian-sdk

Skill Cursor

Domain-first store/port design for any codebase: product-shaped APIs, swappable backends, schema at boundaries, one vocabulary catalog (derive don’t re-author), no infrastructure names on the domain surface. Use when adding or refactoring persistence, cache, policy resolve, registries, or anything that might leak…

not rated 939 +7 11d ago A 145 tokens AGPL-3.0

curd

77

JaguarJack/catch-admin

Skill Claude Code

Generates complete CRUD module from database table definition. Orchestrates 9 sub-skills. Use when user says "create CRUD", "generate module from table", or provides a table structure.

not rated 930 +2 6d ago A 42 tokens original Apache-2.0

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 885 today A 83 tokens original MIT

api

79

xberg-io/html-to-markdown

Skill Claude CodeCodex

Use html-to-markdown-rs api reference documentation.

not rated 863 +3 3d ago A 13 tokens original MIT

anthonylee991/gemini-superpowers-antigravity

Skill Claude CodeCodex

Builds reliable automations that integrate with REST APIs: auth, pagination, retries, rate limits, idempotency, webhooks, data mapping, and safe error handling. Use when calling external APIs, syncing systems, or building ETL-style workflows.

not rated 827 +2 7mo ago A 57 tokens original MIT

api-tester

81

laolaoshiren/claude-code-skills-zh

Skill Claude CodeCodex

A tool for creating and checking API tests from the real API contract and implementation. An API is the agreed way that software sends requests and receives responses.

not rated 817 +9 yesterday A 86 tokens original MIT

fastapi-guard

82

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 813 today A 72 tokens original MIT

helix-org-cli

83

helixml/helix

Skill Claude CodeCodex

Use the Helix CLI to operate helix-org (bots, topics, processors, chat) and raw REST via helix api. Use when listing/managing org bots, chatting with chief-of-staff or other bots, or calling any authenticated Helix API path.

not rated 804 +1 yesterday A 59 tokens

rust-skills

84

sockudo/sockudo

Skill Claude CodeCodex

Comprehensive Rust coding guidelines with 179 rules across 14 categories. Use when writing, reviewing, or refactoring Rust code. Covers ownership, error handling, async patterns, API design, memory optimization, performance, testing, and common anti-patterns. Invoke with /rust-skills.

not rated 796 +5 yesterday A 62 tokens original MIT

PaulJPhilp/EffectPatterns

Skill Cursor

Effect-TS service and agent patterns for this repo. Use when implementing or modifying services in packages/mcp-server, adding agents, or following Effect.Service, Layer, and error-handling conventions.

not rated 796 +2 2mo ago A 46 tokens original MIT

build-connector

86

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 771 +7 2d ago A 41 tokens original Apache-2.0

starlette

87

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 766 +1 3d ago A 163 tokens

x402

88

BillionsNetwork/verified-agent-identity

Skill Claude CodeCodex

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

not rated 757 3mo ago A 0 tokens

mindsdb/anton

Skill Claude CodeCodex

MANDATORY reading before writing ANY backend, API, server, or fullstack application code (createartifact types fullstack-stateless-app / fullstack-stateful-app, or anything that will be launched with launchbackend). Contains the complete hard contract: the canonical FastAPI+Mangum backend.py template, SECRETS…

not rated 752 +3 changed 2d ago A 115 tokens original MIT

kapso-whatsapp

90

desplega-ai/agent-swarm

Skill Claude Code

How to interact with Kapso WhatsApp from the swarm — read inbound webhook payloads (text AND media), fetch message history, send free-form messages within the 24h session window (and template messages outside it), mark-as-read, show the typing indicator, send reactions, download media, verify webhook signatures, and…

not rated 742 +13 today A 156 tokens original MIT

integration-channel

91

ChatbotXIO/ChatbotX

Skill Claude CodeCodex

Create and modify integration channels (messenger, whatsapp, zalo, tiktok, webchat, etc.) for the chatbot platform. Use when adding a new channel integration, modifying webhook handlers, working with message send/receive, or connecting external platforms.

not rated 733 +39 today A 53 tokens

cloudflare

92

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 729 7mo ago A 68 tokens copy · 91% MIT

workflow-ai-coding

93

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 684 +66 5d ago A 85 tokens original MIT

wp-plugin-dev

94

msrbuilds/elementor-mcp

Skill Claude Code

Develop WordPress plugins following official WordPress coding standards, security best practices, and WordPress.org directory guidelines. Use this skill whenever the user wants to create, scaffold, or develop a WordPress plugin — including standard plugins (settings pages, CPTs, shortcodes), WooCommerce extensions…

not rated 678 +22 yesterday A 147 tokens GPL-2.0

api-guide

95

lablup/backend.ai

Skill Claude Code

Guide for implementing REST and GraphQL APIs (create, get, search, update, delete, purge, scope prefix patterns, admin prefix, SearchScope, BaseFilterAdapter, @apifunction, Click CLI).

not rated 672 yesterday A 46 tokens LGPL-3.0

kafka

96

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 658 +5 yesterday A 31 tokens GPL-3.0

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: