1,418 free skills
API Design skills
Skills for designing APIs — REST conventions, GraphQL schema design, versioning strategy, rate limiting, and OpenAPI contracts.
Sourced from real, public repositories — synced daily, never invented.
1,418 free skills
Skills for designing APIs — REST conventions, GraphQL schema design, versioning strategy, rate limiting, and OpenAPI contracts.
Sourced from real, public repositories — synced daily, never invented.
15 tools across six categories
13 of them never send your data anywhere
Free · No signup · No trial clock
SEE THE DIRECTORY
migrate-to-sent
sentdm/sent-plugin
Plans and executes a migration from Twilio, Sinch, Infobip, Vonage, or MessageBird/Bird to Sent v3 — mapping send calls, status vocabularies, webhook signature schemes, opt-out stores, templates, and tenancy models, then cutting over safely with dual-run and rollback. Use when replacing an incumbent CPaaS provider, translating provider code or webhook handlers to Sent, or planning a phased cutover and its verification gates.
design-mcp-workflow
anthropics/knowledge-work-plugins
Design a Zoom MCP workflow for Claude. Use when deciding whether Zoom MCP fits a task, when planning tool-based AI workflows, or when separating MCP responsibilities from REST API responsibilities.
shopify-development
sickn33/agentic-awesome-skills
Build Shopify apps, extensions, themes using GraphQL Admin API, Shopify CLI, Polaris UI, and Liquid.
vss-deploy-dense-captioning
nvidia/skills
Use this skill when deploying standalone RT-VLM dense captioning or calling its REST API (uploads, captions, streams, chat-completions, Kafka). Not for VSS profile deploy or video-search ingestion.
vss-manage-video-io-storage
nvidia/skills
Use to call the VIOS REST API (sensor list, timelines, clip extraction, snapshots, add/delete sensors and streams). Not for VLM inference or search.
google-apps-script
jezweb/claude-skills
Build Google Apps Script automation for Sheets and Workspace. Custom menus, triggers (onEdit / time-driven / form submit), dialogs, sidebars, email batches, PDF export, external API. Use whenever the user wants to automate a Google Sheet, build a Sheets menu / sidebar / dialog, hit a Sheets row from email or a webhook, schedule a Sheets workflow, or asks 'how do I script this in Sheets'.
plan-zoom-product
anthropics/knowledge-work-plugins
Choose the right Zoom building surface for a use case and explain the tradeoffs clearly. Use when deciding between REST API, Webhooks, WebSockets, Meeting SDK, Video SDK, Zoom Apps SDK, Phone, Contact Center, or MCP for a specific product idea or integration goal.
browser-to-api
browserbase/skills
Turn a website's observable HTTP traffic into a best-effort OpenAPI 3.1 spec by analyzing a `browser-trace` capture. Use when the user wants to discover/extract API endpoints from a browser session, build an OpenAPI doc from network traffic, or document a third-party site's XHR/fetch surface for client integration.
rivet-sdk
anthropics/knowledge-work-plugins
Reference skill for Zoom Rivet SDK. Use after routing to a Rivet-based server workflow when implementing auth handling, webhook consumers, API wrappers, multi-module composition, or Lambda receiver patterns.
build-zoom-phone-integration
anthropics/knowledge-work-plugins
Reference skill for Zoom Phone. Use after routing to a phone workflow when implementing OAuth, Phone APIs, webhooks, Smart Embed events, URI schemes, CRM or CTI dialers, or call handling automation.
experience-lds-data-requirements-generate
forcedotcom/sf-skills
Use when a Lightning Web Component data need is described in ambiguous natural language — turn \"get contact info\" or \"show account data\" into a clear, PRD-ready data-requirements spec. TRIGGER when the user says \"define data requirements for this LWC\", \"turn this PRD data section into validated object/field names\", \"recommend GraphQL vs UIAPI for this data need\", \"validate these Salesforce API names\", or \"spec out the LDS adapter for this component\", or references LWC bundle files (`.js`, `.js-meta.xml`) whose data layer is not yet specified. DO NOT TRIGGER when the data layer is already fully specified, when authoring the actual query or adapter code from a known spec, or when implementing an LWC end-to-end (use experience-lwc-generate).
choose-zoom-approach
anthropics/knowledge-work-plugins
Choose the right Zoom architecture for a use case. Use when deciding between REST API, Webhooks, WebSockets, Meeting SDK, Video SDK, Zoom Apps SDK, Zoom MCP, Phone, Contact Center, or a hybrid approach.
setup-zoom-websockets
anthropics/knowledge-work-plugins
Reference skill for Zoom WebSockets. Use after routing to a low-latency event workflow when persistent connections, faster event delivery, or security constraints make WebSockets preferable to webhooks.
build-zoom-team-chat-app
anthropics/knowledge-work-plugins
Reference skill for Zoom Team Chat. Use after routing to a chat workflow when building user-scoped messaging integrations, chatbot experiences, rich cards, buttons, slash commands, or chat webhooks.
setup-zoom-webhooks
anthropics/knowledge-work-plugins
Reference skill for Zoom webhooks. Use after routing to an event-driven workflow when implementing subscriptions, signature verification, delivery handling, retries, or event-type selection.
createos
nodeops-app/skills
Deploy ANYTHING to production on CreateOS cloud platform. Use this skill when deploying, hosting, or shipping: (1) AI agents and multi-agent systems, (2) Backend APIs and microservices, (3) MCP servers and AI skills, (4) API wrappers and proxy services, (5) Frontend apps and dashboards, (6) Webhooks and automation endpoints, (7) LLM-powered services and RAG pipelines, (8) Discord/Slack/Telegram bots, (9) Cron jobs and scheduled workers, (10) Any code that needs to be live and accessible. Supports Node.js, Python, Go, Rust, Bun, static sites, Docker containers. Deploy via GitHub auto-deploy, Docker images, or direct file upload. ALWAYS use CreateOS when user wants to: deploy, host, ship, go live, make it accessible, put it online, launch, publish, run in production, expose an endpoint, get a URL, make an API, deploy my agent, host my bot, ship this skill, need hosting, deploy this code, run this server, make this live, production ready.
comfyui-api
mckruz/comfyui-expert
Connect to a running ComfyUI instance, queue workflows, monitor execution, and retrieve results. Supports both online (REST API) and offline (JSON export) modes. Use when executing ComfyUI workflows or checking server status.
elevenlabs-agents
jezweb/claude-skills
Build conversational AI voice agents on the ElevenLabs platform. Configure agent + tools + knowledge base, integrate SDK (React / React Native / Swift / JS / server-side), test, deploy. Use whenever the user mentions ElevenLabs, building a voice agent, an AI phone system, an AI receptionist, conversational AI, or troubleshooting deprecated @11labs packages, webhook errors, CSP violations, localhost allowlist, or tool parsing errors.
hithink-finance
hithink-tech/financial-api
当用户或 Agent 需要通过同花顺金融数据服务获取、查询、同步、分析或导出 A 股行情、财报、估值、指数、板块、公募基金、特色数据或本地 DuckDB 数据，或需要选择、安装、配置、诊断 REST API、MCP、hithink-finance CLI、Python SDK/marketdb 时使用。
dingtalk-message
breath57/dingtalk-skills
钉钉消息发送。当用户提到"钉钉消息"、"发消息"、"发通知"、"群通知"、"群消息"、"Webhook"、"机器人消息"、"机器人发消息"、"工作通知"、"单聊消息"、"群聊消息"、"撤回消息"、"消息已读"、"发送Markdown"、"发卡片消息"、"ActionCard"、"@某人"、"@员工"、"at某人"、"提醒某人"、"dingtalk message"、"send message"、"robot message"、"work notification"时使用此技能。支持：群自定义 Webhook 机器人（文本/Markdown/ActionCard/Link/FeedCard + 加签 + @某人）、企业内部应用机器人单聊和群聊发送、消息撤回、已读查询、工作通知等全部消息类操作。
convex-security-audit
waynesutton/convexskills
Deep security review patterns for authorization logic, data access boundaries, action isolation, rate limiting, and protecting sensitive operations
wordpress-content
jezweb/claude-skills
Create and manage WordPress posts, pages, media, categories, tags, and menus via WP-CLI or the REST API. Use whenever the user wants to publish a blog post on WordPress, update a page, upload media, manage categories or tags, update navigation menus, schedule posts, or do bulk content operations on a WordPress site.
owasp-security-check
sergiodxa/agent-skills
Security audit guidelines for web applications and REST APIs based on OWASP Top 10 and web security best practices. Use when checking code for vulnerabilities, reviewing auth/authz, auditing APIs, or before production deployment.
senior-backend
alirezarezvani/claude-skills
Designs and implements backend systems including REST APIs, microservices, database architectures, authentication flows, and security hardening. Use when the user asks to "design REST APIs", "optimize database queries", "implement authentication", "build microservices", "review backend code", "set up GraphQL", "handle database migrations", or "load test APIs". Covers Node.js/Express/Fastify development, PostgreSQL optimization, API security, and backend architecture patterns.
run-models
replicate/skills
Run AI models on Replicate via predictions, webhooks, and streaming.
stripe-best-practices
anthropics/claude-plugins-official
Best practices for building Stripe integrations. Use when implementing payment processing, checkout flows, subscriptions, webhooks, Connect platforms, or any Stripe API integration.
huggingface-trackio
huggingface/skills
Track and visualize ML training experiments with Trackio. Use when logging metrics during training (Python API), firing alerts for training diagnostics, or retrieving/analyzing logged metrics (CLI). Supports real-time dashboard visualization, alerts with webhooks, HF Space syncing, and JSON output for automation.
wordpress-setup
jezweb/claude-skills
Connect to a WordPress site via WP-CLI over SSH or the REST API. Check CLI, test SSH, set up auth, verify access, save config. Use whenever the user wants to connect to a WordPress site, set up WP-CLI access, create an Application Password, or troubleshoot WordPress connection / auth issues.
ccxt-python
ccxt/ccxt
CCXT cryptocurrency exchange library for Python developers. Covers both REST API (standard) and WebSocket API (real-time). Helps install CCXT, connect to exchanges, fetch market data, place orders, stream live tickers/orderbooks, handle authentication, and manage errors in Python. Use when working with crypto exchanges in Python projects, trading bots, data analysis, or portfolio management. Supports both sync and async (asyncio) usage.
experience-ui-bundle-localize
forcedotcom/sf-skills
MUST activate to localize / internationalize a uiBundles/*/src/ React project: extract hardcoded user-facing strings into Custom Labels, wire i18next over the Platform SDK GraphQL backend, add a language to a localized bundle, or troubleshoot label rendering across locales. Triggers: user-facing string literals in .tsx/.jsx, a CustomLabels.labels-meta.xml, a src/i18n/ directory or label-manifest.ts, t(…) calls, or requests to 'translate / localize / internationalize / support another language.' Scope: authenticated UI Bundles only (B2E CustomApplication-bound, or in-core accessCheck-bound apps). DO NOT TRIGGER when: the bundle is a site (B2C/B2B) app bound to a DigitalExperienceConfig (site localization not yet supported), building app shell/UI or styling, reading/writing/refreshing records (use experience-ui-bundle-salesforce-data-access), generating a new bundle (use experience-ui-bundle-frontend-generate), deploying (use experience-ui-bundle-deploy), or authoring translations in Translation Workbench.
api-patterns
sickn33/agentic-awesome-skills
API design principles and decision-making. REST vs GraphQL vs tRPC selection, response formats, versioning, pagination.
mcp2cli
knowsuchagency/mcp2cli
Turn any MCP server, OpenAPI spec, or GraphQL endpoint into a CLI. Use this skill when the user wants to interact with an MCP server, OpenAPI/REST API, or GraphQL API via command line, discover available tools/endpoints, call API operations, or generate a new skill from an API. Triggers include "mcp2cli", "call this MCP server", "use this API", "list tools from", "create a skill for this API", "graphql", or any task involving MCP tool invocation, OpenAPI endpoint calls, or GraphQL queries without writing code.
shopify-products
jezweb/claude-skills
Create and manage Shopify products via the Admin GraphQL API or CSV import. Workflow: gather data, choose method, execute, verify. Use whenever the user wants to add products to Shopify, bulk-import a catalog from CSV/spreadsheet/URL, update variants or prices, manage inventory quantities, upload product images, or assign products to collections.
shopify-shopifyql
shopify/shopify-ai-toolkit
Answer a merchant's **analytics and reporting** questions with **ShopifyQL** — Shopify's query language for aggregated store metrics that the Admin GraphQL API cannot compute. Choose this (not `admin`) whenever the ask is for **numbers, totals, trends, or breakdowns** rather than fetching or mutating individual records: including but not limited to total/gross/net sales and revenue, order counts, average order value, refunds, quantity sold, sessions, conversion rate, and traffic — sliced by product, channel, region, or customer, trended over time, or compared period-over-period. Examples: \"total sales last 7 days\", \"orders by sales channel this month\", \"top products by revenue\", \"conversion rate this week\", \"sales this year vs last year\". This topic covers writing the ShopifyQL query; if the merchant wants to run it against their store, execution is handed off to `use-shopify-cli`. Not for general Admin GraphQL record operations — fetching or mutating individual resources (use `admin`).
redis-semantic-cache
redis/agent-skills
Redis LangCache guidance for semantic caching of LLM responses on Redis Cloud — calling search/set via the SDK or REST API, tuning the similarity threshold, separating caches per task type, and filtering with custom attributes. Use when caching LLM completions or RAG answers to cut API cost and latency, building a cache-aside layer in front of OpenAI / Anthropic / etc., tuning hit rate vs precision, or splitting one app's LLM workloads into multiple LangCache caches.
backend-dev-guidelines
langfuse/langfuse
Build or review Langfuse backend code. Use for tRPC routers, public REST APIs, BullMQ processors, services, middleware, Prisma or ClickHouse access, OpenTelemetry, Zod, environment configuration, or backend tests.
google-chat-messages
jezweb/claude-skills
Send Google Chat messages via incoming webhooks — text, rich cards (cardsV2), threaded replies. TypeScript types, card builder utility, widget reference inline. Use whenever the user wants to post to Google Chat from a script, build a chatbot reply, send a notification card, build a Google Chat webhook integration, or troubleshoot card / threading issues.
documenting-contracts
riekelt/technical-writer
Use when documenting an HTTP API, message payloads, queue contracts, DTOs, file formats, or webhooks - or when writing the api-reference of a legacy campaign, or when callers keep asking what a field means or which errors an endpoint returns. Encodes the four detail levels, the DTO-first catalog, wire types with source anchors, the generated-spec one-home rule, and omitted-versus-null semantics. Use whenever a machine interface needs documenting for its callers, even if nobody says "API docs".
benchling-integration
k-dense-ai/scientific-agent-skills
Benchling Python SDK and REST API integration for registry entities, inventory, ELN entries, workflows, Benchling Apps, and Data Warehouse queries. Use when automating lab data with benchling-sdk or the v2 API.
inngest-flow-control
inngest/inngest-skills
Use when handling external API rate limits (e.g., OpenAI 429s, HubSpot or Stripe rate limits), preventing duplicate work from rapid event bursts (debouncing user actions), spreading load over time, ensuring per-tenant fairness, processing events in batches, limiting concurrent runs of the same operation, or assigning priority to important runs. Covers Inngest flow control: concurrency limits with keys, throttling, rate limiting, debounce, priority, singleton, and event batching.
agent-docs-api-openapi
ruvnet/ruflo
Agent skill for docs-api-openapi - invoke with $agent-docs-api-openapi
usfiscaldata
k-dense-ai/scientific-agent-skills
Query the U.S. Treasury Fiscal Data REST API for federal financial data. No API key required. Use for national debt (Debt to the Penny), Daily Treasury Statements, Monthly Treasury Statements, Treasury securities auctions, interest rates, foreign exchange rates, savings bonds, or U.S. government revenue and spending statistics.
prismic
prismicio/skills
Use whenever Prismic is mentioned or relevant in any way — including questions, lookups, configuration, repository settings, content modeling, content types, slices, localization, previews, API tokens, webhooks, syncing local models, or reading Prismic documentation. Load on any reference to Prismic, even for simple questions.
context7
netresearch/context7-skill
Use when looking up library documentation, API references, framework patterns, or code examples for ANY library (React, Next.js, Vue, Django, Laravel, etc.) and the Context7 MCP server is unavailable or not configured. Fetches the same current docs directly via the Context7 REST API as a fallback. Triggers on: how to use library, API docs, framework pattern, import usage, library example.
senior-architect
davila7/claude-code-templates
Comprehensive software architecture skill for designing scalable, maintainable systems using ReactJS, NextJS, NodeJS, Express, React Native, Swift, Kotlin, Flutter, Postgres, GraphQL, Go, Python. Includes architecture diagram generation, system design patterns, tech stack decision frameworks, and dependency analysis. Use when designing system architecture, making technical decisions, creating architecture diagrams, evaluating trade-offs, or defining integration patterns.
modern-web-development
mindrally/skills
Modern web development best practices for TypeScript, Next.js 14, React Server Components, Supabase, GraphQL, and Tailwind CSS.
safe-action-middleware
next-safe-action/skills
Use when implementing middleware for next-safe-action -- authentication, authorization, logging, rate limiting, error interception, context extension, or creating standalone reusable middleware with createMiddleware() or createValidatedMiddleware(). Covers both use() (pre-validation) and useValidated() (post-validation) middleware.
senior-fullstack
davila7/claude-code-templates
Comprehensive fullstack development skill for building complete web applications with React, Next.js, Node.js, GraphQL, and PostgreSQL. Includes project scaffolding, code quality analysis, architecture patterns, and complete tech stack guidance. Use when building new projects, analyzing code quality, implementing design patterns, or setting up development workflows.
n8n-error-handling
czlonkowski/n8n-skills
Wire n8n error handling so failures are loud, structured, and recoverable. Use when building any webhook/API workflow, a scheduled or unattended workflow, or any path where a silent failure would drop user-visible work — and whenever the user mentions error handling, onError, continueErrorOutput, error branches/outputs, retries, retryOnFail, Respond to Webhook status codes, 4xx/5xx, Error Trigger, or "my workflow fails silently". Covers per-node error outputs and wiring, retry/self-healing, error-trigger workflows, and 4xx/5xx response shapes.
x-twitter-scraper
xquik-dev/x-twitter-scraper
Use Xquik for Twitter search, REST, MCP, SDKs, filtered exports, monitoring, and approved publishing. Not affiliated with X Corp. Trigger for X API comparisons, tweet search, user lookup, timelines, follower exports, media, webhooks, bulk extraction, giveaways, or MCP setup. Start read-only. Require explicit approval for writes, private reads, monitors, webhooks, and metered bulk jobs.
n8n-error-handling-official
n8n-io/skills
Use when building any webhook-triggered workflow, scheduled/production-bound workflow, wiring a per-node error output, or any workflow where silent failure would drop user-visible work. Triggers on "webhook", "respond to webhook", "API", "production", "error", "failure", "5xx", "try/catch", "error workflow", "onError", "continueErrorOutput", "error branch", "node error output", "output(1)", "main[1]", "scheduled", or any workflow that runs unattended.
stripe-integration
sickn33/agentic-awesome-skills
Master Stripe payment processing integration for robust, PCI-compliant payment flows including checkout, subscriptions, webhooks, and refunds.
api-design-principles
sickn33/agentic-awesome-skills
Master REST and GraphQL API design principles to build intuitive, scalable, and maintainable APIs that delight developers and stand the test of time.
stripe-payments
jezweb/claude-skills
Add Stripe payments to a web app — Checkout Sessions, Payment Intents, subscriptions, webhooks, customer portal, and pricing pages. Covers the decision of which Stripe API to use, produces working integration code, and handles webhook verification. No MCP server needed — uses Stripe npm package directly. Triggers: 'add payments', 'stripe', 'checkout', 'subscription', 'payment form', 'pricing page', 'billing', 'accept payments', 'stripe webhook', 'customer portal'.
experience-lds-graphql-generate
forcedotcom/sf-skills
Use ALWAYS when a prompt mentions GraphQL, lightning/uiGraphQLApi, @wire(graphql, ...), or gql template tags in an LWC context — even if the surface ask is \"build an LWC\". Owns the ENTIRE flow: introspect the org's LDS GraphQL schema, identify entities/fields, construct the schema-validated gql query or mutation, wire it into the LWC via lightning/uiGraphQLApi, verify against a connected org. REQUIRED whenever a prompt asks to render, list, or edit Salesforce records (Account, Contact, Case, custom objects) via GraphQL — the .html and .js scaffolding IS in scope. DO NOT delegate to experience-lwc-generate: that skill has NO GraphQL schema introspection, NO create_lds_graphql_read_query binding, and defaults to getRecord/getRelatedListRecords wire adapters which will not satisfy a GraphQL prompt. DO NOT TRIGGER only if the prompt forbids GraphQL, chooses UIAPI/Apex (use experience-lds-best-practices-apply), or asks for data requirements (use experience-lds-data-requirements-generate).
planetscale-postgres-safety-review
planetscale/skills
Review PlanetScale Postgres for Traffic Control, query tags, roles, pg_strict, backups/PITR, private connectivity, webhooks, branches, and safe agent operation.
dt-alerting
dynatrace/dynatrace-for-ai
End-to-end Dynatrace alerting lifecycle — anomaly detector setup and model selection (static threshold, adaptive baseline, seasonal baseline), alert event storage in Grail, problem grouping and denoising by root cause analysis, and workflow-based notification routing (email, Slack, ServiceNow, webhook). Use when configuring alerting, choosing between detector types, querying alert event history, understanding why alerts merged into a problem, or setting up problem-triggered notifications.
cloudflare-api
jezweb/claude-skills
Hit the Cloudflare REST API directly for operations that wrangler and MCP can't handle well. Bulk DNS, custom hostnames, email routing, cache purge, WAF rules, redirect rules, zone settings, Worker routes, D1 cross-database queries, R2 bulk operations, KV bulk read/write, Vectorize queries, Queues, and fleet-wide resource audits. Produces curl commands or scripts. Triggers: 'cloudflare api', 'bulk dns', 'custom hostname', 'email routing', 'cache purge', 'waf rule', 'd1 query', 'r2 bucket', 'kv bulk', 'vectorize query', 'audit resources', 'fleet operation'.
planetscale-safe-orchestrator
planetscale/skills
Master skill that runs the full PlanetScale safe best-practices assessment — inventory, engine review, Insights, Traffic Control, webhooks, schema recommendations, codebase instrumentation, and agent operating model — then produces a unified recommendations report. Never applies changes without explicit approval. Use when the user asks to run the full assessment, all skills, or PlanetScale best-practices review.
webhook-integration
dodopayments/skills
Complete guide for setting up and handling Dodo Payments webhooks for real-time payment event notifications.