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
api-documentation-writer
eddiebe147/claude-settings
Expert guide for writing comprehensive API documentation including OpenAPI specs, endpoint references, authentication guides, and code examples. Use when documenting APIs, creating developer portals, or improving API discoverability.
azure-devops
julianobarbosa/claude-code-skills
Comprehensive Azure DevOps REST API skill for work items, pipelines, repos, test plans, wikis, and search operations via MCP tools and direct API calls
bff-design
citypaul/.dotfiles
Decide whether a system needs a backend-for-frontend, how many, and what each one may own: adoption signals and honest costs, one-experience-one-BFF granularity with frontend-team ownership, the shape-don't-decide rule, upstream aggregation with partial-failure and resilience budgets, identity-keyed BFF caching, mediating user identity toward upstream services (token exchange, confused-deputy prevention), and the alternatives (shared gateway, GraphQL federation, token-mediating backend, direct SPA→API, meta-framework server as BFF). Use when adopting or splitting BFFs, aggregating upstream services, handling upstream failures, forwarding user identity downstream, weighing GraphQL against per-client BFFs, or auditing a BFF that has drifted into a public API or a business-logic layer. For protecting the BFF's own entry points use bff-entry-points; for physical route layout use structure-codebase; for externally consumed API contracts use api-design; for OAuth/OIDC protocol flows use secure-oauth-oidc.
django
partme-ai/full-stack-skills
Provides comprehensive guidance for Django framework including models, views, templates, forms, admin, REST framework, and deployment. Use when the user asks about Django, needs to create web applications, implement models and views, or build Django REST APIs.
better-auth-integration
dodopayments/skills
Guide only for applications using @dodopayments/better-auth, covering authenticated customer sync, checkout, portal access, usage ingestion, and verified webhook callbacks.
subgraphs
goldsky-io/goldsky-agent
Use this skill when the user asks about Goldsky Subgraphs — deploying, managing, or querying subgraphs. Triggers on: 'deploy a subgraph', 'migrate from The Graph', 'what is a subgraph', 'GraphQL endpoint', 'low-code or no-code subgraph', 'subgraph tags', 'subgraph webhooks', 'cross-chain subgraph', 'subgraph stalled', 'subgraph API key', 'init subgraph', 'scaffold subgraph', 'subgraph logs', 'pause subgraph', 'start subgraph', 'graft subgraph'. Also use this skill when the user wants to build a GraphQL API over onchain data, power a dApp frontend with indexed blockchain data, or reuse an existing TheGraph subgraph on Goldsky. For questions about streaming raw chain data directly to a database without GraphQL, use the turbo-builder or mirror skills instead.
meegle-plugin-development
tingwillforever/meegle-skills
Use when building, configuring, diagnosing, or extending Meegle plugins, including full plugin workflows, atomic `lpm` operations, and backend-integration knowledge for webhook/OpenAPI/proxy work.
api-designer
wyattowalsh/agents
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email-best-practices
resend/email-skills
Use when building email features, emails going to spam, high bounce rates, setting up SPF/DKIM/DMARC authentication, implementing email capture, ensuring compliance (CAN-SPAM, GDPR, CASL), handling webhooks, retry logic, making emails accessible (alt text, headings, contrast, screen readers), or deciding transactional vs marketing.
dependency-track
julianobarbosa/claude-code-skills
Comprehensive guide for Dependency-Track - Software Composition Analysis (SCA) and SBOM management platform. USE WHEN deploying Dependency-Track, integrating with CI/CD pipelines, configuring vulnerability scanning, managing SBOMs, setting up policy compliance, troubleshooting installation issues, or working with the REST API.
scraping
knoopx/pi
Fetches web pages, parses HTML with CSS selectors, calls REST APIs, and scrapes dynamic content. Use when extracting data from websites, querying JSON APIs, or automating browser interactions.
rate-limit
tushaarmehtaa/tushar-skills
Implement or audit Upstash Redis rate limits with trusted user, tenant, API-key, or IP identifiers, 429 headers, and outage behavior. Use when protecting Next.js routes from abuse or cost.
dmr-openapi-skeleton
wemake-services/django-modern-rest
Generate django-modern-rest transport-layer skeletons from OpenAPI 3.1+ specs. Use when Codex needs to turn an OpenAPI file, URL, or pasted document into typed DTOs, controllers, routers, Django URL wiring, and minimal tests for this repository or similar projects built on dmr. Trigger on requests to scaffold APIs, bootstrap apps, or map OpenAPI operations to Controller, Router, and OpenAPI view constructs without implementing business logic.
smartlead-api
growthenginenowoslawski/coldoutboundskills
Smartlead API endpoint reference and patterns. Use for any Smartlead campaign, lead, email account, analytics, or inbox operation. Covers auth, rate limiting, and all commonly used endpoints.
prospeo-full-export
growthenginenowoslawski/coldoutboundskills
Export your entire Prospeo people search to CSV. Build filters in Prospeo's UI, then use this skill to extract every result via the API — even searches over 25K. Handles pagination, rate limiting, deduplication, and state-by-state splitting automatically. Pair with /icp-prompt-builder on a 50-person sample to tune a qualification prompt BEFORE exporting 25K.
pubnub-functions
pubnub/skills
Create, configure, and deploy PubNub Functions 2.0 event handlers, triggers, and serverless endpoints. Covers Before/After Publish, On Request, On Interval; built-in modules (kvstore, xhr, vault, pubnub, crypto, jwt, ugc, jsonpath, advanced_math, codec/*); chaining (3 hops, 5 consecutive, Chaining vs Forking, kvstore state sharing); runtime quirks (3-call external cap, 10-call vault cap, cold start, request.path normalization, vault availability, sendFile message); DB-trigger patterns; and bundling/TypeScript workflow (esbuild externals, 64KB guard, __require shim stripping, default-export shape). Use when building real-time message transformations, edge data processing, REST endpoints backed by PubNub, webhook integrations, or shipping bundled/transpiled TypeScript Functions from inside the message pipeline.
context7
dirnbauer/webconsulting-skills
Use when looking up library documentation, API references, framework patterns, or code examples for ANY library (React, Next.js, Vue, Django, Laravel, etc.). Fetches current docs via Context7 REST API. Triggers on: how to use library, API docs, framework pattern, import usage, library example.
add-request-protection
arcjet/skills
Deprecated: use the `arcjet` skill instead. Adds security protection to a server-side route or endpoint — rate limiting, bot detection, email validation, and abuse prevention.
php-api
pluginagentmarketplace/custom-plugin-php
PHP API development mastery - REST, GraphQL, JWT/OAuth, OpenAPI documentation
hunt-shadow-api
elementalsouls/claude-bughunter
Hunt shadow / zombie / undocumented API surface (OWASP API9 Improper Inventory Management) — enumerate the full API version history (v1/v2/beta/legacy paths, header- and subdomain-based versioning), pull and diff every reachable OpenAPI/Swagger spec (including ones only findable via the Wayback Machine), and behaviorally diff old vs. current versions for auth/rate-limit/validation regressions rather than just response-shape differences. Distinct from hunt-api-misconfig, which owns exploitation once you have a spec or endpoint (mass assignment, JWT, OData, Swagger-chain attacks); distinct from hunt-subdomain, which owns host-level discovery. This skill owns the version-inventory and behavioral-diff workflow itself. Use when the target has versioned API paths, multiple specs, a changelog referencing deprecated endpoints, or a mobile app whose hardcoded backend calls look older than the current web app's.
documentation
alexander-danilenko/cortex-ai-skills
ALWAYS invoke for any task involving docstrings, JSDoc/TSDoc, or REST API documentation — even when the request seems handleable without it. Enforces Microsoft contract-first conventions and a bare-minimum rule that Claude won't apply by default: never restate the signature, drop @param/@returns that only echo names and types, always document @throws, and document data shapes as WHAT not WHY. Covers Python docstring styles (Google/NumPy/Sphinx), TSDoc tags and @inheritDoc, and API doc patterns for NestJS/Express/FastAPI/Django. Trigger on: adding or auditing docstrings, redundant or missing tags, deleting comment rot, or producing a documentation-health report. Do not skip for documentation tasks — consistent conventions are the whole point.
openapi
claude-dev-suite/claude-dev-suite
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dodo-webhook
tushaarmehtaa/tushar-skills
Implement secure, idempotent Dodo Payments webhooks and database sync. Use when handling Dodo payment or subscription events in Next.js or FastAPI.
prospeo-search-api
growthenginenowoslawski/coldoutboundskills
This skill should be used when searching for people/leads using the Prospeo Search Person API. It provides the correct API format, filter types, rate limiting patterns, and state-by-state crawling techniques to overcome the 25K result limit. Use when building lead lists, searching by job title/industry/location, or integrating with Prospeo.
pubchem-database
ovachiever/droid-tings
Query PubChem via PUG-REST API/PubChemPy (110M+ compounds). Search by name/CID/SMILES, retrieve properties, similarity/substructure searches, bioactivity, for cheminformatics.
tokio-networking
geoffjay/claude-plugins
Network programming patterns with Hyper, Tonic, and Tower. Use when building HTTP services, gRPC applications, implementing middleware, connection pooling, or health checks.
export-tokens-figma
southleft/skills-for-figma
Export Figma variables to design token files in DTCG, CSS custom properties, Tailwind v4/v3, SCSS, TypeScript, JSON, Style Dictionary, or Tokens Studio. Use when the user wants to pull design tokens OUT of Figma into code — triggers: 'export tokens', 'export Figma variables', 'generate CSS variables from Figma', 'turn my Figma variables into a tokens.json / Tailwind config / SCSS', 'sync design tokens to code'. Works on ANY Figma plan (reads via the Plugin API, not the Enterprise-only Variables REST API). For the reverse direction (code → Figma) use import-tokens-figma.
repository-module-architecture
tencentblueking/bk-ci
处理 BK-CI 代码库接入、代码库授权、Webhook、SCM 集成、PAC 开关与仓库类型差异时使用。当用户提到 Git/SVN/GitHub/TGit、Webhook、仓库认证、PAC 代码库或提交记录时优先使用。
documentation-builder
partme-ai/full-stack-skills
Generates structured technical documentation including API docs (OpenAPI/Swagger), README files, user guides, developer guides, and changelogs. Use when the user needs to create or improve project documentation, generate API reference docs, write onboarding guides, or structure documentation for a codebase.
technical-writing
anton-abyzov/specweave
Technical writing expert for API documentation, README files, tutorials, changelog management, and developer documentation. Covers style guides, information architecture, versioning docs, OpenAPI/Swagger, and documentation-as-code. Activates for technical writing, API docs, README, changelog, tutorial writing, documentation, technical communication, style guide, OpenAPI, Swagger, developer docs.
pentest-outbound-interaction-oob-detection
crtvrffnrt/skills
Outbound interaction and OOB validation for SSRF callbacks, blind XSS beacons, webhook abuse, XXE/OOB behavior, DNS/HTTP/HTTPS callback correlation, asynchronous server-side interaction proof, and egress validation.
api-design
krzysztofsurdy/code-virtuoso
REST and GraphQL API design principles for consistent, predictable, and evolvable APIs. Use when the user asks to design a new API, review an existing API, choose between REST and GraphQL, plan API versioning, define error response contracts, implement pagination, or establish API standards for a team. Covers resource modeling, endpoint naming, HTTP methods, status codes, authentication patterns, rate limiting, HATEOAS, and API evolution strategies.
implementing-warehouse-sources
posthog/posthog
Implement and extend PostHog Data warehouse import sources. Use when adding a new source under products/warehouse_sources/backend/temporal/data_imports/sources, adding datasets/endpoints to an existing source, or adding incremental sync, resumable imports, webhook ingestion, pagination, credentials validation, and source tests.
syncfusion-vue-data-manager
syncfusion/vue-ui-components-skills
Implements Syncfusion Vue DataManager for local/remote binding, CRUD, querying, caching, and middleware. Supports JsonAdaptor, ODataAdaptor, ODataV4Adaptor, UrlAdaptor, WebApiAdaptor, WebMethodAdaptor, RemoteSaveAdaptor, GraphQLAdaptor, CustomDataAdaptor, and CustomAdaptor. Covers Query class, filtering, sorting, paging, grouping, persistence, offline mode, caching, and error handling.
flag-create
growthbook/skills
Create a new feature flag in GrowthBook via the REST API. Use when the user asks to "create a feature flag", "add a flag for X", "wrap this in a feature flag", "I need a flag to gate this", or "feature toggle for X". For adding rules to an existing flag, use flag-rules. For removing a flag, use flag-cleanup.
convex-fundamentals
op0ai/claude-skills
Guide for Convex backend development fundamentals including function types (queries, mutations, actions), layered architecture, HTTP actions, and the core mental model. Use when building Convex backends, creating queries/mutations/actions, implementing HTTP webhooks, or understanding Convex's reactive data model. Activates for Convex project setup, function definition, API design, or backend architecture tasks.
graphql-api-design
seb1n/awesome-ai-agent-skills
Design GraphQL APIs with well-structured schemas, efficient resolvers, pagination, and performance patterns like DataLoader and federation. Use when the user requests graphql api design or provides relevant inputs for this workflow.
ingest-figma
bluzir/claude-code-design
Pull design tokens + frame structure from a Figma URL via the Figma REST API. Requires FIGMA_TOKEN env var.
api-versioning
thibautbaissac/rails_ai_agents
>-
syncfusion-javascript-data-manager
syncfusion/javascript-ui-controls-skills
Implements Syncfusion TypeScript/JavaScript(ES6+) DataManager for local/remote binding, CRUD, querying, caching, and middleware. Supports JsonAdaptor, ODataAdaptor, ODataV4Adaptor, UrlAdaptor, WebApiAdaptor, WebMethodAdaptor, RemoteSaveAdaptor, GraphQLAdaptor, CustomDataAdaptor, and CustomAdaptor. Covers Query class, filtering, sorting, paging, grouping, persistence, offline mode, caching, and error handling.
api-database-vercel-kv
agents-inc/skills
Serverless Redis-compatible key-value store via Upstash REST API -- edge-compatible, automatic JSON serialization, TTL-based caching
openapi
trpc/trpc
>
supporting-modules-architecture
tencentblueking/bk-ci
处理 BK-CI 支撑服务模块时使用，例如 Ticket、Environment、Notify、Log、Quality、OpenAPI 等能力的定位、边界和入口选择。当用户要判断该去哪个支撑模块而不是修改核心流水线链路时优先使用。
subgraph-builder
goldsky-io/goldsky-agent
Build, author, and deploy Goldsky Subgraphs — hosted GraphQL APIs over onchain data. Use when the user wants to create, scaffold, write, or deploy a subgraph; design a schema/entities; write or fix AssemblyScript mapping handlers; configure subgraph.yaml (handlers, templates, instant/no-code from ABI); set up GraphQL endpoints, tags, or webhooks; optimize a slow subgraph (eth_calls, immutable entities); or pause/resume a subgraph. Triggers on: 'build/deploy/scaffold a subgraph', 'write a mapping', 'design a schema', 'subgraph.yaml', 'instant subgraph', 'combine/compose/merge multiple subgraphs', 'cross-chain subgraph', 'optimize indexing speed', 'too many eth_calls', 'pause/resume subgraph'. For a subgraph that is failing, stalled, erroring, or won't deploy, use /subgraph-doctor (optimizing a healthy subgraph belongs here, not the doctor). For migrating off The Graph, use /subgraph-migrate. For streaming raw chain data to a DB without GraphQL, use /turbo-builder.
carbium
sendaifun/skills
Build on Solana with Carbium infrastructure — bare-metal RPC, Standard WebSocket pubsub, gRPC Full Block streaming (~22ms), DEX aggregation via CQ1 engine (sub-ms quotes), gasless swaps, and MEV-protected execution via Jito bundling. Drop-in replacement for Helius, QuickNode, Triton, or Jupiter Swap API.
managing-subscriptions
posthog/ai-plugin
Manage PostHog subscriptions — scheduled email, Slack, or webhook deliveries of insight or dashboard snapshots, optionally with an AI-written summary attached to each delivery. Use when the user wants to subscribe to an insight or dashboard, get an AI summary attached to those deliveries, check existing subscriptions, change delivery frequency, add or remove recipients, or stop receiving updates.
experiment-stop
growthbook/skills
Stop a running GrowthBook experiment via the REST API, optionally declaring a winning variation and rolling it out to 100% of eligible traffic. Use when the user says "stop this experiment", "end the A/B test", "declare a winner for X", "ship the winning variation", "roll back the test", or "we're done with this experiment". For interpreting results before deciding, use experiment-analyze first.
experiment-launch
growthbook/skills
Launch a GrowthBook A/B test end-to-end via the REST API — create the experiment, prep the feature flag, wire the experiment-ref rule, and start the experiment. Use when the user says "launch this experiment", "create the experiment", "wire up the A/B test", "kick off the test", "set up X as an experiment in GrowthBook", "start the experiment for flag Y", or "I already have a flag and want to run an experiment on it". Works for both experiment-first (creates the flag) and flag-first (detects the existing flag via the reuse path and wires the experiment to it). For designing the spec first, use experiment-design. For stopping a running experiment, use experiment-stop. For interpreting results, use experiment-analyze.
redis
partme-ai/full-stack-skills
Guides Redis usage including data structures (strings, hashes, lists, sets, sorted sets), caching patterns, pub/sub, persistence (RDB/AOF), clustering, and Lua scripting. Use when the user needs to implement caching, session storage, rate limiting, queues, or any Redis-based data layer.
stripe-integration
breverdbidder/life-os
Guides consistent, correct implementation of Stripe payment processing including payment flows, webhooks, subscriptions, and customer management. Use when integrating Stripe payments, setting up subscriptions, implementing webhooks, or managing customer billing.
kie-ai
thepexcel/agent-skills
Execution skill สำหรับ Kie.ai API (Grok Imagine ผ่าน kie.ai proxy) — รับ prompt จาก /art-tech-engineer แล้ว gen ภาพ/วีดีโอผ่าน Kie.ai REST API รองรับ text-to-image, image-to-image, image-to-video, และ upscale ใช้เมื่อถูกระบุให้ใช้ Kie.ai โดยตรง หรือเมื่อ orchestrator delegate มา
openapi-specification
nickcrew/claude-cortex
OpenAPI 3.x specification design, schema patterns, and validation for REST API contracts. Use when creating or maintaining API specifications, generating documentation, or validating API contracts.
x-twitter-scraper
davila7/claude-code-templates
Use when the user wants to integrate with the X (Twitter) API via Xquik to search tweets, look up user profiles, extract followers, run giveaway draws, monitor accounts, or access trending topics. Also use when the user mentions 'Xquik,' 'Twitter API,' 'X API,' 'tweet scraper,' 'follower extraction,' or 'Twitter monitoring.' Covers REST API, webhooks, and MCP server setup.
huggingface-hub
gary149/huggingface-hub-skill
Expert knowledge for the Hugging Face Hub ecosystem including HTTP/curl API usage, Python/JavaScript SDKs, Spaces apps (Gradio, Docker), model formats (GGUF, PEFT/LoRA), datasets (pandas, Polars, DuckDB), automation (webhooks, Jobs), and security features. Use when working with Hub APIs, huggingface_hub Python code, Spaces apps, inference providers, model/dataset repositories, or Hub automation.
building-python-web-apps
wdm0006/python-skills
Provides an opinionated reference architecture for production Python web apps — FastAPI + async SQLAlchemy + Postgres, pydantic-settings config, Stripe billing, server-rendered Jinja or a decoupled SPA, deployed as a single Docker image on a managed platform via Terraform. Use when starting a new SaaS/web app, choosing a stack, structuring routers/services/models, wiring Stripe webhooks, protecting FastAPI docs or OpenAPI routes, setting up config/secrets, or deciding how to deploy.
graphql
thelobbi/claude
GraphQL API development including schemas, resolvers, queries, mutations, and subscriptions. Activate for GraphQL servers, clients, and API design.
openapi-contract
claude-dev-suite/claude-dev-suite
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hf-model-inference
letta-ai/skills
Guidance for setting up HuggingFace model inference services with Flask APIs. This skill applies when downloading HuggingFace models, creating inference endpoints, or building ML model serving APIs. Use for tasks involving transformers library, model caching, and REST API creation for ML models.
app-shopify-admin-graphql
niccos-shopify-workspace/shopify-cursor-skills
Execute Shopify Admin API calls via GraphQL in Shopify Remix apps. Use when querying or mutating Shopify data (customers, orders, products, shop, segments, subscriptions), when writing GraphQL for the Admin API, or when handling throttling and retries.
restful-api-design
efoo-team/skills
Web API / HTTP API の設計判断を行うためのスキル。リソース設計、URL、HTTP メソッド、ステータスコード、表現形式、エラー、ページネーション、互換性、バージョニング、セキュリティ、破壊的変更の判断が必要なときに使用する。