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
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bitrix-http-client
bxmaximum/bitrix-framework-skills
Covers Bitrix\Main\Web\HttpClient HTTP client — legacy mode and PSR-18 (sendRequest), async Promise, proxies/timeouts, http_client_options, main.HttpClient logger, SSRF, redirects, and GeoIp\Manager lookups. Applied in external API integrations, webhooks, async calls and geolocation. Key terms — HttpClient, PSR-18, Promise, SSRF, GeoIp, Manager, webhook.
graphql-architect
404kidwiz/claude-supercode-skills
GraphQL schema and federation expert specializing in resolver optimization, subscriptions, and API gateway patterns
java-expert
oimiragieo/agent-studio
Java and Spring Boot expert including REST APIs, JPA, and microservices
resend
oakoss/agent-skills
Resend email API for sending transactional and marketing emails. Use when integrating email delivery, managing domains, handling webhooks, building email workflows with React Email, managing contacts, or sending broadcasts. Use for resend, email, transactional, broadcast, contacts, segments, webhooks, domain.
tanstack-pacer
oakoss/agent-skills
TanStack Pacer for rate limiting, throttling, debouncing, and async queuing. Use when controlling execution frequency, managing API rate limits, debouncing user input, or queuing async tasks. Use for pacer, throttle, debounce, rate-limit, queue, async-throttle, rate-limiting.
omnisocials
omnisocials/omnisocials-agent-skills
Manage social media across 11 platforms (Instagram, Facebook, LinkedIn Profile + Page, YouTube, TikTok, X, Pinterest, Bluesky, Threads, Mastodon, Google Business). Create posts, stories, reels, upload media, organize folders, view analytics, read and reply to the social inbox (DMs, comments, mentions), and configure webhooks via the OmniSocials API.
buffer-api
genericservice/claude-skills
Schedule, create, and manage social media posts via the Buffer GraphQL API. Use this skill when the user wants to post to social media through Buffer, schedule posts, create ideas, list channels, retrieve posts, or manage their Buffer queue. Triggers on: Buffer, schedule a post, publish to social media, Buffer API, social media queue, Buffer channels, create Buffer post, Buffer idea, or any mention of posting to LinkedIn/Twitter/Instagram/Facebook/Bluesky/Threads/Pinterest/Mastodon/YouTube/TikTok via Buffer.
graphql-expert
rightnow-ai/openfang
GraphQL expert for schema design, resolvers, subscriptions, and performance optimization
review-java
nesnilnehc/ai-cortex
Review Java code for language and runtime conventions: concurrency, exceptions, try-with-resources, API versioning, collections and Streams, NIO, and testability. Language-only atomic skill; output is a findings list.
manage-openapi-overlays
speakeasy-api/skills
Use when creating, applying, or validating overlay files including x-speakeasy extensions. Covers overlay syntax, JSONPath targeting, retries, pagination, naming, grouping, open enums, global headers, custom security. Triggers on "create overlay", "apply overlay", "overlay file", "x-speakeasy", "add extension", "configure retries", "add pagination", "overlay for retries".
aliyun-gbi-analytics
cinience/alicloud-skills
Use when managing Alibaba Cloud DataAnalysisGBI via OpenAPI/SDK, including the user needs DataAnalysisGBI resource lifecycle operations, configuration changes, status inspection, or troubleshooting for analytics service workflows.
b2c-ecdn
salesforcecommercecloud/b2c-developer-tooling
Manage eCDN zones, security settings, and edge configuration for B2C Commerce storefronts. Use this skill whenever the user needs to purge CDN cache, provision SSL certificates, configure WAF or firewall rules, set up rate limiting, enable logpush or Page Shield, manage MRT routing, configure mTLS or cipher suites, or optimize edge performance. Also use when troubleshooting CDN-layer issues or managing zone settings -- even if they just say 'clear the cache' or 'block bot traffic on our storefront'.
openydt-api-explorer
xiaowen-0725/openydt-cli
通用 API 兜底与接口探索：当某接口没有专属一等命令时，用 openydt api <cmd> --body 直发任意 callable 接口，并从 catalog.json 查 cmd/参数、区分能主动调的 callable 与只能被动接收的 webhook。当某 cmd 在域技能里找不到专属子命令、要调未一等化的接口(如城市运营券/第三方车场/小区门禁/月票预约/授权访客/证件规则/车辆标签等)、或问『这个 cmd 怎么调 / 平台会不会回调我』时使用。
aliyun-bdrc-backup
cinience/alicloud-skills
Use when managing Alibaba Cloud Backup and Disaster Recovery Center (BDRC) via OpenAPI/SDK, including the user needs backup/disaster-recovery resource operations, including inventory, policy/configuration changes, status checks, and troubleshooting BDRC workflows.
x-twitter-scraper
akillness/jeo-skills
Use when the user needs X (Twitter) data or confirmation-gated X actions through Xquik: tweet search, user lookup, follower extraction, media download, monitoring, webhooks, MCP, SDKs, posting, likes, DMs, and profile updates. Requires a Xquik API key. Never ask for X login material.
figma-version-history
southleft/figma-console-mcp-skills
List a Figma file's version history, snapshot the file at any past version, and diff two versions (added/removed/renamed pages plus deep per-component changes). Use when the user wants to inspect Figma history — triggers: 'list Figma versions', 'what versions does this file have', 'show version history', 'snapshot this file at version X', 'get the file as it was last week', 'diff two Figma versions', 'what changed between these versions', 'compare version A and B', 'did this component change between releases'. Uses the Figma REST API + a personal access token because version history is NOT reachable via the Plugin API / use_figma / the native Figma MCP. For a prose release-notes writeup use figma-generate-changelog; to find which version introduced a change use figma-blame-node.
figma-comments
southleft/figma-console-mcp-skills
Read, post, reply to, and delete comments on a Figma file via the REST API — including pinning a comment to a specific node and threading replies. Use when the user wants to work with Figma comments programmatically — triggers: 'get Figma comments', 'read comments on this file', 'post a comment in Figma', 'leave a comment on this node', 'reply to a Figma comment', 'pin a comment to this element', 'delete a Figma comment', 'notify designers of drift', 'add a review note in Figma'. Uses the Figma REST API + a personal access token because comments are NOT reachable via the Plugin API / use_figma / the native Figma MCP.
grpc-protobuf
ashchupliak/dream-team
gRPC and Protocol Buffers - use for service-to-service communication, API definitions, streaming, and inter-service contracts
figma-generate-changelog
southleft/figma-console-mcp-skills
Generate a human-readable markdown changelog between two Figma file versions — pages added/removed/renamed plus per-component changes, enriched with author handles and timestamps, ready to paste into release notes, PRs, or Storybook MDX. Use when the user wants prose history — triggers: 'generate a Figma changelog', 'write release notes from Figma', 'what changed between these versions in markdown', 'summarize Figma changes for the PR', 'changelog between version A and B', 'design changelog since last release'. Uses the Figma REST API + a personal access token because version history is NOT reachable via the Plugin API / use_figma / the native Figma MCP. For raw structured diff JSON use figma-version-history; to find which version introduced a specific change use figma-blame-node.
figma-blame-node
southleft/figma-console-mcp-skills
Find which Figma version introduced a specific change — a component property or a child node — via a binary search over version history (~log2(N) API calls instead of N). Answers 'who added this and when'. Use when the user wants git-blame-style attribution for a Figma design — triggers: 'when was this component property added', 'which version introduced this variant', 'who added this node', 'blame this Figma element', 'find when this was created', 'git blame for Figma', 'when did this property first appear'. Uses the Figma REST API + a personal access token because version history is NOT reachable via the Plugin API / use_figma / the native Figma MCP. For a full diff between two versions use figma-version-history; for prose release notes use figma-generate-changelog.
stripe-stack
scientiacapital/skills
Stripe integration patterns for Next.js + Supabase - payments, subscriptions, webhooks, credit systems, checkout. Use when: stripe, payments, billing, subscription, webhook, checkout, add payments to project.
bitrix-rest
bxmaximum/bitrix-framework-skills
Covers REST module — registering methods from a custom module, scopes, webhook and OAuth overview, rest / restIntegration settings, link to Engine controllers and ActionFilter\Scope::REST. Applied when exposing module APIs to apps, webhooks, or marketplace integrations. Key terms — rest, OnRestServiceBuildDescription, CRestUtil, scope, webhook, OAuth, APAuth, restIntegration, Scope::REST, BX.rest.callMethod.
spree-typescript-sdk
spree/agent-skills
Use when the user is building a TypeScript or JavaScript client against Spree — a Next.js storefront, a custom admin tool, a webhook receiver, a backend service that talks to the Spree API. Covers @spree/sdk (Store API) and @spree/admin-sdk (Admin API). Common phrasings include "Spree SDK", "createClient", "publishable key", "store client", "admin client", "TypeScript types from Spree", "Zod schemas", "verifyWebhookSignature", "retry config", "MSW Spree", "@spree/sdk", "@spree/admin-sdk". For curl/raw HTTP usage and protocol details, see spree-api-v3.
ha-api
nodnarbnitram/claude-code-extensions
Integrate with Home Assistant REST and WebSocket APIs. Use when making API calls, managing entity states, calling services, subscribing to events, or setting up authentication. Activates on keywords REST API, WebSocket, API endpoint, service call, access token, Bearer token, subscribe_events.
aps-docs-portal
autodesk-platform-services/skills
>
webhook-subscriptions
nousresearch/hermes-agent
Webhook subscriptions: event-driven agent runs.
linear
nousresearch/hermes-agent
Linear: manage issues, projects, teams via GraphQL + curl.
figma-developer
oakoss/agent-skills
Extracts design data from Figma via the REST API and converts designs to React code. Use when syncing Figma tokens to CSS variables, exporting icons as SVG components, generating code from Figma designs, or automating design-to-code workflows. Use for design token extraction, icon export, component generation, and CI-based Figma sync.
spree-events-webhooks
spree/agent-skills
Use when the user wants Spree to react to something that happened — sync orders to an ERP, send notifications, fire webhooks, integrate with external services, configure webhook endpoints, verify webhook signatures. Common phrasings include "react to X", "when X happens", "send notification when", "sync to external service", "Spree events", "subscribers", "publish_event", "webhook endpoint", "webhook signature", "X-Spree-Webhook-Signature", "HMAC", "webhook retry", "webhook failed", "webhook.test". Covers in-process subscribers (Ruby side effects) AND outbound webhooks (HTTPS POSTs to external URLs).
spree-security
spree/agent-skills
Use when the user is hardening a Spree app, responding to a security finding, reviewing a PR for security issues, setting up secrets management, configuring CSP/CORS, or asking about Spree-specific security (CanCanCan scopes, encrypted preferences, webhook HMAC, PCI scope). Covers both standard Rails security practices (CSRF, mass assignment, SQL injection, secrets in repo) AND the Spree-specific pieces (publishable vs secret keys, scope enforcement, SSRF on webhooks, CanCanCan abilities). Common phrasings include "Spree security", "CSP", "CORS", "secret key", "leaked key", "SQL injection", "Strong Params", "CanCanCan", "PCI", "webhook signature", "SSRF".
coinank-openapi
coinank/coinank-openapi-skill
Access CoinAnk crypto derivatives market data via API key or Agent Payments Protocol/x402 pay-per-call.
order-processing-pipeline
finsilabs/awesome-ecommerce-skills
Implement a reliable order state machine that moves orders from pending through payment, fulfillment, and delivery with webhook-driven transitions
pentest-api-deep
jd-opensource/joysafeter
Deep OWASP API Security Top 10 testing for REST, GraphQL, gRPC, and WebSocket APIs — BFLA, mass assignment, rate limiting, and unsafe consumption.
spree-resource
spree/agent-skills
Use when the user wants to add a new model, database table, or REST API endpoint to their Spree project. Covers both `spree:api_resource` (full surface — model + API controllers + serializers + factory + specs + routes) and `spree:model` (model + migration only, no API). Common phrasings include "add a Brand model", "create a new resource", "expose X as an API endpoint", "add an admin API for Y", "scaffold a Spree resource", "create a Spree model without an API", "internal model".
api-design
majiayu000/spellbook
REST/GraphQL/gRPC API design best practices. Use when designing APIs, defining contracts, handling versioning. Covers OpenAPI 3.2, GraphQL Federation, gRPC streaming.
go-concurrency-web
existential-birds/beagle
Go concurrency patterns for high-throughput web applications including worker pools, rate limiting, race detection, and safe shared state management. Use when implementing background task processing, rate limiters, or concurrent request handling.
wix-manage
wix/skills
Wix business solution management recipes — REST API operations for configuring and managing Wix business solutions. Routes to: stores, bookings, get-paid, CMS, contacts, forms, media, app-installation, pricing-plans, restaurants, ricos rich-content, sites, blog, calendar, domains, events, site-properties, ecommerce, marketing, google-ads, analytics, accessibility, seo, dashboard-navigation.
webhooks
editframe/skills
Webhook notifications for render completion and file processing events. Configure an endpoint, verify HMAC signatures, and handle real-time status payloads.
express
partme-ai/full-stack-skills
Provides comprehensive guidance for Express.js framework including routing, middleware, request handling, error handling, and API development. Use when the user asks about Express, needs to create HTTP servers, set up routes, implement middleware, or build REST APIs.
stripe-integration
finsilabs/awesome-ecommerce-skills
Build secure payment flows with Stripe — Payment Intents, subscription billing, webhook handling, and European SCA compliance for card payments
graphql-editor
membranedev/application-skills
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abc-apifox
abcfed/claude-marketplace
ABC 医疗云 API 文档查询工具。读取和查询 ABC API 的 OpenAPI 规范文档（5000+ 接口），支持按模块、路径、方法搜索，自动解析 $ref 引用。采用按模块拆分的缓存结构，查询速度快。使用场景：(1) 查询 API 接口定义 (2) 搜索特定功能接口 (3) 查询 Schema 定义 (4) 查看接口统计信息
rate-limiting
wshaddix/dotnet-skills
Rate limiting patterns for ASP.NET Core Razor Pages applications. Covers fixed window, sliding window, token bucket algorithms, and distributed rate limiting with Redis. Use when implementing rate limiting in ASP.NET Core applications, choosing between different rate limiting algorithms, or setting up distributed rate limiting with Redis.
php-wordpress
pluginagentmarketplace/custom-plugin-php
WordPress development mastery - themes, plugins, Gutenberg blocks, and REST API
webhook-dx-audit
hookdeck/webhook-skills
>
tokio-concurrency
geoffjay/claude-plugins
Advanced concurrency patterns for Tokio including fan-out/fan-in, pipeline processing, rate limiting, and coordinated shutdown. Use when building high-concurrency async systems.
rest-api-design
bm629/agent-skills
>
api-gateway-patterns
nickcrew/claude-cortex
API Gateway patterns for routing, authentication, rate limiting, and service composition in microservices architectures. Use when implementing API gateways, building BFF layers, or managing service-to-service communication at scale.
openapi-first
rrezartprebreza/spring-boot-skills
>
magento-graphql
finsilabs/awesome-ecommerce-skills
Query Magento's GraphQL API to build headless storefronts or PWA Studio frontends with products, cart, checkout, and customer operations
openapi-documentation
dengineproblem/agents-monorepo
Эксперт по OpenAPI документации. Используй для создания Swagger спецификаций, API schemas и автогенерации документации.
gddy
godaddy/cli
Use GoDaddy's beta CLI (`gddy`) to search, register, and manage domains and DNS records. Load this skill whenever a task involves running `gddy` commands, parsing their JSON output, finding or buying a domain, or editing DNS records (A, CNAME, MX, TXT, etc.) for a domain hosted at GoDaddy. `gddy` is a separate tool from GoDaddy's older `godaddy` CLI (applications, deployments, webhooks) — do not use this skill for that tool, and don't trigger for other registrars or DNS providers (Cloudflare, Route 53, Namecheap, etc.) unless GoDaddy is explicitly involved.
argocd-login
laurigates/claude-plugins
ArgoCD CLI auth with SSO and gRPC-Web. Use when the user mentions ArgoCD login, argocd authentication, SSO auth, or accessing ArgoCD applications and clusters.
orderly-trading-orders
orderlynetwork/skills
Place, manage, and cancel orders using REST API or SDK hooks. Covers market, limit, IOC, FOK, POST_ONLY order types and batch operations
openapi-ts-client
bm629/agent-skills
>
geti-using-the-pipeline
open-edge-platform/geti
Use the Geti application end to end through its REST API — the project → dataset → annotate → train → deploy pipeline served by the FastAPI backend in `application/backend/`. Use when a user (not a contributor) wants to create a project, upload media, add annotations, launch a training or quantization job, track job status, configure a source → model → sink inference pipeline, and enable live inference. Covers the `/api/...` endpoints and the async job model, not backend code changes.
gql-api
hashnode/gql-skill
>-
dotnet-service-communication
wshaddix/dotnet-skills
Choosing inter-service protocols. REST vs gRPC vs SignalR vs SSE decision matrix, tradeoffs.
implementing-api-patterns
ancoleman/ai-design-components
API design and implementation across REST, GraphQL, gRPC, and tRPC patterns. Use when building backend services, public APIs, or service-to-service communication. Covers REST frameworks (FastAPI, Axum, Gin, Hono), GraphQL libraries (Strawberry, async-graphql, gqlgen, Pothos), gRPC (Tonic, Connect-Go), tRPC for TypeScript, pagination strategies (cursor-based, offset-based), rate limiting, caching, versioning, and OpenAPI documentation generation. Includes frontend integration patterns for forms, tables, dashboards, and ai-chat skills.
laravel-api
fusengine/agents
Use when creating API endpoints, transforming responses with API Resources, or handling API authentication, rate limiting, or versioning.