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
graphql-inspector-diff
thebushidocollective/han
Use when detecting breaking changes between GraphQL schema versions, comparing schemas across branches, or validating schema migrations.
review-api-design
psenger/ai-agent-skills
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whop-payments-network
whopio/whop-payments-network-skill
Integrate the Whop Payments Network into your platform — pay-ins, payouts, checkout, embedded components, API patterns, and webhooks.
celery-advanced
yonatangross/orchestkit
Advanced Celery patterns including canvas workflows, priority queues, rate limiting, multi-queue routing, and production monitoring. Use when implementing complex task orchestration, task prioritization, or enterprise-grade background processing.
rate-limiting
yonatangross/orchestkit
API rate limiting with token bucket, sliding window, and Redis distributed patterns. Use when implementing rate limits, throttling requests, handling 429 Too Many Requests, protecting against API abuse, or configuring SlowAPI with Redis.
stripe-best-practices
getpaykit/skills
Configure the Stripe provider for PayKit, set up API keys, webhook endpoints, sync plans with paykitjs push, handle webhooks, and use the Stripe Customer Portal. Use when users need to connect PayKit to Stripe or troubleshoot Stripe integration.
alchemy-api
allium-labs/skills
Wire Alchemy into application code (server, backend, dApp, script) using a standard API key. Preferred app-integration path for normal server/backend usage. Covers EVM JSON-RPC, WebSocket subscriptions, Simulation, Webhooks/Notify, Solana RPC, Solana DAS, Solana Yellowstone gRPC, Sui gRPC, Wallets/Account Kit, Account Abstraction, and operational topics. Requires `$ALCHEMY_API_KEY`. For app code without an API key (autonomous agent paying per-request, or explicit x402/MPP), use `alchemy-agentic-gateway` instead.
encore-webhook
encoredev/skills
Receive inbound webhooks from external services (Stripe, GitHub, Slack, Twilio, etc.) using `api.raw(...)` from `encore.dev/api`. The right skill any time the user names a third-party provider that POSTs events to a URL you own.
code-documenter
alexander-danilenko/cortex-ai-skills
Use when adding docstrings, creating API documentation, or building documentation sites. Invoke for OpenAPI/Swagger specs, JSDoc, doc portals, tutorials, user guides.
graphql-dev
orcaqubits/agentic-commerce-skills-plugins
Write GraphQL queries, mutations, and subscriptions — fragments, code generation, TypedDocumentNode, variables, error handling, and client setup. Use when writing GraphQL code for Saleor.
sales-trendhero
sales-skills/sales
trendHERO platform help — Instagram influencer analytics (95M+ profiles, 20+ filters), Account Quality Score (AQS 1-100, fake follower detection), Audience Analysis, Daily Tracking, Ads Database (10M+ posts), Audience Overlap, REST API (Bearer auth, webhooks). Covers discovery search, AQS interpretation, audience vetting, tracking setup, ads database research, API integration, and pricing (Free/Lite/Pro/Advanced). Use when you suspect an influencer has fake followers, trendHERO search results aren't matching your niche, you need to monitor an influencer's metrics over time, you want to see which influencers your competitors are using, the trendHERO API isn't working as expected, you're unsure which trendHERO plan fits your budget, or you're deciding between trendHERO, HypeAuditor, and Heepsy. Do NOT use for influencer strategy across platforms (use /sales-influencer-marketing), TikTok marketing (use /sales-tiktok-marketing), gaming influencer marketing (use /sales-gaming-marketing), or ad campaigns (use /sales-retargeting).
graphql-architect
rmyndharis/antigravity-skills
Master modern GraphQL with federation, performance optimization,
sentry-nestjs-sdk
getsentry/sentry-for-claude
Full Sentry SDK setup for NestJS. Use when asked to "add Sentry to NestJS", "install @sentry/nestjs", "setup Sentry in NestJS", or configure error monitoring, tracing, profiling, logging, metrics, crons, or AI monitoring for NestJS applications. Supports Express and Fastify adapters, GraphQL, microservices, WebSockets, and background jobs.
encore-go-webhook
encoredev/skills
Receive inbound webhooks from external services (Stripe, GitHub, Slack, Twilio, etc.) in Encore Go using `//encore:api raw`. The right skill any time the user names a third-party provider that POSTs events to a URL you own.
graphql-inspector-ci
thebushidocollective/han
Use when setting up GraphQL Inspector in CI/CD pipelines, GitHub Actions, or GitLab CI for automated schema validation.
grpc-services
thelobbi/claude
gRPC service development in .NET for high-performance inter-service communication
lattice-grpc-integration
anduril/lattice-sdk-ai
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payment-integration
binjuhor/shadcn-lar
Implement payment integrations with SePay (Vietnamese payment gateway with VietQR, bank transfers, cards) and Polar (global SaaS monetization platform with subscriptions, usage-based billing, automated benefits). Use when integrating payment processing, implementing checkout flows, managing subscriptions, handling webhooks, processing bank transfers, generating QR codes, automating benefit delivery, or building billing systems. Supports authentication (API keys, OAuth2), product management, customer portals, tax compliance (Polar as MoR), and comprehensive SDK integrations (Node.js, PHP, Python, Go, Laravel, Next.js).
writing-openapi-specs
speakeasy-api/agent-skills
Reference guide for OpenAPI specification best practices, naming conventions, and expressing complex REST API patterns like polymorphism, enums, file uploads, and server-sent events. Use when writing or improving OpenAPI specs to ensure they follow established conventions and generate quality SDKs.
agentmail
sundial-org/awesome-openclaw-skills
API-first email platform designed for AI agents. Create and manage dedicated email inboxes, send and receive emails programmatically, and handle email-based workflows with webhooks and real-time events. Use when you need to set up agent email identity, send emails from agents, handle incoming email workflows, or replace traditional email providers like Gmail with agent-friendly infrastructure.
openapi-spec-generation
rmyndharis/antigravity-skills
Generate and maintain OpenAPI 3.1 specifications from code, design-first specs, and validation patterns. Use when creating API documentation, generating SDKs, or ensuring API contract compliance.
databricks-zerobus-ingest
databricks-solutions/ai-dev-kit
Build Zerobus Ingest clients for near real-time data ingestion into Databricks Delta tables via gRPC. Use when creating producers that write directly to Unity Catalog tables without a message bus, working with the Zerobus Ingest SDK in Python/Java/Go/TypeScript/Rust, generating Protobuf schemas from UC tables, or implementing stream-based ingestion with ACK handling and retry logic.
using-cli-tools
augmnt/webdev-skills
Enforces CLI tool usage over web dashboards for reproducibility and scriptability. Use when working with Git/GitHub, Supabase, Vercel, Netlify, Cloudflare, AWS, Stripe, Prisma, Docker, or any cloud service. Triggers on deployments, database operations, migrations, PRs, issues, webhooks, or environment management.
api-database-redis
agents-inc/skills
Redis in-memory data store patterns with ioredis and node-redis -- caching, sessions, rate limiting, pub/sub, streams, queues, transactions, cluster
graphql-developer
olehsvyrydov/ai-development-team
[Extends solution-architect] GraphQL API specialist. Use for GraphQL schemas, Apollo Server/Federation, DataLoader, resolvers, subscriptions. Invoke alongside solution-architect for GraphQL API design.
graphql-codegen
pluginagentmarketplace/custom-plugin-graphql
Generate TypeScript types and React hooks from GraphQL schemas
grpc
managedcode/dotnet-skills
Build or review gRPC services and clients in .NET. USE FOR: ASP.NET Core gRPC, protobuf contracts, unary or streaming RPC, gRPC client factory, interceptors, deadlines, cancellation, channel reuse, backend service integration. DO NOT USE FOR: broad browser-facing APIs without gRPC-Web tradeoff review, SignalR realtime hubs, plain REST APIs. INVOKES: dotnet build/test and focused service or client smoke checks when code changes.
bagisto-payment-method-development
bagisto/agent-skills
Use when creating or changing a Bagisto payment method — a payment class, the payment methods config, the checkout redirect and callback flow, or integrating a gateway such as Stripe or PayPal. Trigger phrases include "payment", "payment method", "payment gateway", "Stripe", "PayPal", "Razorpay", "checkout payment", "redirect", "webhook".
zephyr-json
ksachdeva/zephyr-rtos-ai
JSON serialization and deserialization in Zephyr RTOS using the descriptor-based JSON library. Use when encoding C structs to JSON strings, parsing JSON into C structs, working with nested objects or arrays, handling cloud/IoT protocols (MQTT, HTTP, CoAP payloads), or implementing REST APIs on embedded devices.
api-graphql
dragnoir/shopify-agent-skills
Work with Shopify GraphQL APIs including Admin API and Storefront API. Use this skill for querying and mutating Shopify data, managing products, orders, customers, handling pagination, working with metafields, and understanding rate limits. Covers authentication, queries, mutations, and webhooks.
apideck-codegen
apideck-libraries/api-skills
Generate typed API clients from Apideck OpenAPI specs using code generators. Use when the user wants to generate custom SDK clients, typed models, API stubs, or server scaffolding from Apideck's published OpenAPI specifications. Covers openapi-generator, Speakeasy, and Postman import workflows.
grpc-integration-patterns
thapaliyabikendra/ai-artifacts
gRPC integration patterns for ABP microservices including service implementation, client generation, multi-tenancy, and error handling. Use when: (1) implementing inter-service communication, (2) creating gRPC service endpoints, (3) consuming gRPC clients in AppServices, (4) designing high-performance APIs.
grpc-python
yonatangross/orchestkit
gRPC with Python using grpcio and protobuf for high-performance microservice communication. Use when implementing service-to-service APIs, streaming data, or building polyglot microservices requiring strong typing.
api-designer
alexander-danilenko/cortex-ai-skills
Use when designing REST or GraphQL APIs, creating OpenAPI specifications, or planning API architecture. Invoke for resource modeling, versioning strategies, pagination patterns, error handling standards.
api-patterns
alicoder001/agent-skills
API integration patterns including REST, GraphQL, WebSocket, and tRPC. Use when designing APIs, implementing data fetching, or building real-time features.
n8n-expression-syntax
wilkomarketing/antigravity-n8n-skills
Validate n8n expression syntax and fix common errors. Use when writing n8n expressions, using {{}} syntax, accessing $json/$node variables, troubleshooting expression errors, mapping data between nodes, or referencing webhook data in workflows. Use this skill whenever configuring node fields that reference data from previous nodes — expressions are how n8n passes data between nodes, and getting the syntax wrong is the most common source of workflow errors.
route-to-openapi
zebbern/claude-code-guide
Generates RESTful API documentation (OpenAPI 3.0 / Swagger spec) by scanning route definitions in code for Flask, FastAPI, Express, Gin, and other frameworks. Trigger when users ask about API documentation, OpenAPI, Swagger, endpoint docs, generating docs from code, or extracting endpoints.
attacking-grpc-protobuf
trilwu/secskills
Test gRPC and Protocol Buffers services — recovering .proto definitions from server reflection or compiled descriptors, calling methods with grpcurl and grpcui, intercepting HTTP/2 and gRPC-Web traffic, and fuzzing unknown message schemas with protobuf-inspector. Use when a target speaks gRPC, HTTP/2 with application/grpc, or when a request body is opaque binary protobuf rather than JSON.
restful-convention
zeno-common/soil-coding-skills
Enforces RESTful API design conventions for HTTP interface layer. Invoke when designing REST APIs, writing Controller classes, defining endpoints, or reviewing API design.
orpc-openapi
middleapi/orpc
Expose an oRPC router as a spec-compliant OpenAPI HTTP API. Use when a project depends on @orpc/openapi, or for defining REST-style routes on oRPC procedures (openapi() metadata or .route with method, path, successStatus), serving them with OpenAPIHandler alongside RPCHandler, coercing query and path strings with Smart Coercion, calling an OpenAPI-shaped API with OpenAPILink, generating an OpenAPI 3.1 document with OpenAPIGenerator, or serving Scalar or Swagger docs with the OpenAPI Reference plugin. Biases toward retrieval from the oRPC docs over pre-trained knowledge. For contract-first work (defining contracts with oc, implementing them with implement, or generating a contract from an existing OpenAPI spec), use the orpc-contract skill; for plain RPC serving, core builder, middleware, or client work with no REST exposure, use the orpc skill instead.
api-design-framework
yonatangross/orchestkit
Comprehensive API design patterns for REST, GraphQL, and gRPC. Use when designing APIs, creating endpoints, adding routes, implementing pagination, rate limiting, or authentication patterns.
openapi-glossary
scalar/scalar
Use consistent OpenAPI terminology and definitions when writing documentation, educational material, and tooling guidance.
rest-api-design-patterns
manutej/crush-mcp-server
Comprehensive guide for designing RESTful APIs including resource modeling, versioning strategies, HATEOAS, pagination, filtering, and HTTP best practices
api-design
ahgraber/skills
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truefoundry-prompts
truefoundry/skills
Manages TrueFoundry Prompt Registry. Covers listing, creating, updating, versioning, tagging, and using prompts through the AI Gateway. Agent authoring belongs to the agents skill.
specmatic-openapi-spec-extractor
specmatic/skills
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openapi-pro
yuniorglez/gemini-elite-core
Senior API Architect & Integration Engineer for 2026. Specialized in Type-Safe API contracts using OpenAPI 3.1, Zod-First schema derivation, and automated TypeScript client generation. Expert in bridging the gap between Hono backends and Next.js 16 frontends using `openapi-fetch`, `orval`, and unified monorepo type-sharing.
bknd-webhooks
cameronapak/bknd-skills
Use when configuring webhook integrations in Bknd. Covers receiving incoming webhooks via HTTP triggers, sending outgoing webhooks with FetchTask, event-triggered webhooks on data changes, signature verification, retry patterns, and async processing.
jira
microsoft/hve-core
Jira issue workflows for search, issue updates, transitions, comments, field discovery, and interactive credential setup via the Jira REST API. Use when you need to configure Jira access, search with JQL, inspect an issue, create or update work items, move an issue between statuses, post comments, or discover required fields for issue creation.
shopify-graphql-reference
vercel/shop
Integrate Shopify-validated Storefront or Customer Account GraphQL into Vercel Shop. Use after Shopify AI Toolkit has supplied and validated an API operation, or when adapting existing GraphQL to the template's operation placement, fragments, domain transforms, locale flow, cache role, invalidation, and route architecture.
api-framework-hono
agents-inc/skills
Hono routes, OpenAPI, Zod validation
api-integration
sickn33/agentic-awesome-skills
Designs event-driven architectures, webhook systems, API chaining flows, ETL pipelines, and integration patterns between services. Use whenever the user asks about webhooks, event streaming, API composition, connecting two or more APIs, building pipelines, Pub/Sub, Kafka topics, ETL...
bump-version
sd0xdev/sd0x-dev-flow
Bump package and plugin version in sync. Updates package.json, .claude-plugin/plugin.json, and install-state manifest to the same version. Use when: user says 'bump version', 'update version', '更新版本', '版本 +1', or /bump-version
contentful-api
contentful/skills
Comprehensive Contentful REST API guide. Covers Content Management API (CMA) for creating/updating content, Content Delivery API (CDA) for fetching published content, Preview API, Images API, and GraphQL API. All examples use curl/HTTP — language-agnostic.
n8n-expression-syntax
viliamvolosv/n8n-opencode-skill
Validate n8n expression syntax and fix common errors. Use when writing n8n expressions, using {{}} syntax, accessing $json/$node variables, troubleshooting expression errors, or working with webhook data in workflows.
api-graphql-grpc
lambdatest/agent-skills
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grow-payment-gateway
skills-il/tax-and-finance
Integrate Grow by Meshulam payment gateway into Israeli applications -- covers payment pages (iframe/redirect/SDK), tokenization, recurring billing, payment links, refunds, invoices, webhooks, and 3DS authentication via the Grow Light API. Use when user asks to accept payments via Grow or Meshulam, set up "slikat ashrai" with Grow, create payment links (drishat tashlum), handle recurring charges (hora'ot keva) via Grow tokens, process refunds or Bit cancellations, integrate Grow webhooks, or mentions "Grow", "Meshulam", "grow-il", "meshulam.co.il", Grow payment page, or Grow API. Prevents costly integration mistakes by guiding correct FormData request format, server-side-only restrictions, and the mandatory approveTransaction step that many developers miss. Do NOT use for Cardcom integration (use cardcom-payment-gateway), Tranzila integration (use tranzila-payment-gateway), general payment orchestration across multiple gateways (use israeli-payment-orchestrator), or non-payment queries.
shopify
nousresearch/hermes-agent
Query Shopify Admin/Storefront GraphQL APIs via curl.
n8n-expression-syntax
promptadvisers/n8n-powerhouse
Validate n8n expression syntax and fix common errors. Use when writing n8n expressions, using {{}} syntax, accessing $json/$node variables, troubleshooting expression errors, or working with webhook data in workflows.
n8n-expression-syntax
profsynapse/pact-plugin
Validate n8n expression syntax and fix common errors. Use when writing n8n expressions, using {{}} syntax, accessing $json/$node variables, troubleshooting expression errors, or working with webhook data in workflows.