Best API Development Skills for Claude Code

Query Web3 and on-chain GraphQL endpoints using natural language via the Model Context Protocol.

High-performance browser-based text layout and measurement for virtualization, canvas, and layout-heavy applications.

A prioritized Gmail digest that filters out promotions and noise to surface urgent and personal emails.

Prevent vulnerabilities before they happen by forcing early security framing and secure-by-default design patterns.

Advanced engineering intelligence for building scalable, reliable, and secure distributed backend systems.

Automated local SEO auditing and keyword generation for agencies and small businesses.

Autonomous research and task loop that builds on previous findings to solve complex objectives while you sleep.

Python CLI and reusable client for one-shot chat and SSE streaming via the Felo Open Platform.

Turn OpenAPI specs into exhaustive, framework-ready test suites covering happy paths, edge cases, and security gaps.

A high-performance scraping engine with Playwright stealth, proxy rotation, and anti-bot bypass capabilities.

A structured framework for planning, reviewing, and evolving complex software systems with explicit trade-offs.

Professional IGDB v4 API specialist for advanced game data fetching, Apicalypse queries, and image URL construction.

Search, buy, and sell secondhand books on Estonia's largest marketplace with DPD delivery and AI price suggestions.

nextjs-app-router-audit

Free

Deep audit toolkit for Next.js App Router to fix performance waterfalls, SEO errors, and client boundary leaks.

Automated pipeline to scrape, filter, score, and deliver high-quality VLESS proxies via Telegram bot.

Enterprise Automation Engineering Architect

$50

or 250 cr

Designs and upgrades business automation systems into modular, reliable, observable, secure, low-maintenance, enterprise-grade workflows.

Expert Oracle PL/SQL architect for writing, refactoring, and performance-tuning enterprise database logic.

A rigorous security auditor that scans code for OWASP Top 10 vulnerabilities with severity ratings and concrete fixes.

Audit applications against 12-Factor methodology to identify architectural risks and generate cloud-native fix plans.

make-mcp-reference

$12

or 60 cr

A technical reference and troubleshooting expert for connecting Make.com scenarios to MCP-compatible AI agents.

Generate production-ready, commented Nginx configurations from plain English descriptions.

A production-ready Python integration for Gemini using a unified AIProvider interface for easy model swapping.

testing-with-sandbox

Free

Safely capture and inspect test emails in a staging environment without sending to real recipients.

Monitor any website for price drops, stock changes, and content updates. Sends clean Telegram alerts with smart change detection.

Scaffold a dual-channel Printify/Printful automation engine with advanced rate-limiting and Next.js storefront wiring.

Evaluates AI coding agent platforms across five structural dimensions that determine real-world performance independently of model quality, so teams select on architectural fit rather than benchmark scores.

Professional security audit skill for web apps and APIs with structured severity-based findings and remediation plans.

full-stack-saas-builder-architect

$12.99

or 65 cr

Scaffold production-grade SaaS architecture including database design, multi-tenancy, and security.

Gumroad Bulk Uploader Pro

$19

or 95 cr

Bulk-create Gumroad products from a CSV: upload and attach files, add covers, set prices, tags, and custom permalinks, with duplicate detection and rate-limit resume so a big catalog finishes without rebuilding each listing by hand. Uses the Gumroad API plus Playwright to complete the Content tab steps the API can't.

managing-contacts

Free

Automate Mailtrap marketing contact management, bulk imports, and audience segmentation via API.

Generate realistic JSON or CSV test data from plain-English schema descriptions with up to 1,000 rows.

Deploy production-grade, AI-powered Telegram bots to Raspberry Pi with automated server hardening and scheduled jobs.

make-scenario-builder

$12

or 60 cr

Architect sophisticated Make (Integromat) scenarios with structured module sequences, routing logic, and error handling.

Design and scaffold professional integration and contract testing suites with Testcontainers, Pact, and WireMock.

Gumroad Image Uploader

$9

or 45 cr

Bulk-update cover images and thumbnails across your Gumroad catalog from a CSV or a folder of files named by permalink. Pre-flight checks validate each image (format, size, corruption) before it hits the Gumroad API, and you get an audit log of every success and failure. No clicking through the dashboard product by product.

A production-ready, no-build Chrome Extension for creating professional device mockups from browser screenshots.

Code Migration Planner

$9.99

or 50 cr

Architect safe, staged code migrations with zero-downtime patterns and automated rollback gates.

Maintain 100% uptime with an automated LLM fallback chain that routes from high-tier APIs to local models.

Expert AWS architecture guidance for building secure, scalable, and cost-optimized production environments.

Docker Compose Stack Doctor

$15

or 75 cr

Diagnose why your Docker Compose stack won't come up: port conflicts, bad or missing env vars, absent healthchecks, volume and permission issues, depends_on that doesn't wait for readiness, networking gaps, platform mismatches, and databases that aren't ready. Reads your docker-compose.yml and logs and ranks the blockers with fixes.

Automated launch-readiness auditor for x402 and agent-payment API surfaces.

Instantly generate a runnable Express or Flask mock API server from a description or OpenAPI spec.

Automate TikTok video uploads with browser automation opencli tool

Generate professional-grade 48kHz music clips and full songs for free using Google's Lyria 3 models.

PostgreSQL Schema Architect

$9.99

or 50 cr

Schema mistakes are the most expensive kind — code refactors in days, but a wrong table design holds your data hostage for years

Fully automated playlist migration between Spotify, Apple Music, Tidal, and YouTube Music.

Production-ready Claude API integration with dual-model routing, token tracking, and resilient retry logic.

Automated, API-driven playlist migration from Spotify, Tidal, and YouTube Music to Apple Music with artist validation.

Developer Documentation Writer

$8.99

or 45 cr

Developers don't read documentation — they arrive with a task, scan for the answer, and leave. Docs that aren't structured for that pattern don't get read, they get abandoned

using-email-templates

Free

Expert integration for Mailtrap email templates, Handlebars data mapping, and responsive HTML generation.

Real-time Chinese SEO & advertising law compliance scanner with API-backed banned word detection for 5+ platforms.

120+ paid AI tool endpoints. Pay per use via x402 micropayments on Base (USDC). No API keys, no subscriptions.

uBrowser

$15

or 75 cr

Drive a browser from your agent without the token bloat. Batches navigate/click/type into one call, stays logged in with persistent sessions, and feeds the model compact DOM snapshots instead of giant HTML, so multi-step flows like logins, form-filling, and scraping behind auth stay fast and cheap. Runs on the uBrowser MCP server.

Brain.co & note.com auto-publishing with quality gate & bot bypass

High-reliability Dutch content engine with a Claude-Gemini-Qwen fallback chain and template safeties.

authorizing-api-requests

Free

Secure authentication and account resolution for Mailtrap Email Sending, Sandbox, and Account APIs.

A production-ready XP engine, 10-tier level ladder, and achievement catalog for any application.

Create n8n credentials programmatically via REST API, including a workaround for the cryptic allOf validation bug that blocks OAuth2 credential creation.

Async task delegation for AI agents via shared folders—perfect for cross-OS and remote worker coordination.

make-module-configurator

$12

or 60 cr

Expert technical configuration and data mapping for Make.com modules, IML expressions, and automation logic.

🛡️OpenAPI Contract Guard

$12

or 60 cr

Lint an OpenAPI spec and diff two versions to catch breaking API changes before they reach consumers. Within a spec it flags missing operationId, success responses with no schema, untyped parameters, operations with no security requirement, and unbounded arrays/strings. Across two versions it flags removed paths and operations, removed response codes, a parameter becoming required, narrowed parameter types, removed enum values, and removed response fields. Analyzes JSON specs (convert YAML to JSON first).

A respectful, async web-scraping layer with per-domain rate limiting, robots.txt compliance, and email filtering.

API Rate Limiter Designer

$8.99

or 45 cr

Rate limiting fails in two directions: too loose and one bad client takes down the database for everyone; too crude and you rate-limit your own legitimate power users into churn

API Contract Guardian for AI Coding Agents

$9.99

or 50 cr

Protects API endpoints from accidental breaking changes by generating contract maps, validation rules, integration tests, documentation, and safe AI coding prompts.

Production-ready Resend integration with tracked outbox, open/click analytics, and per-archetype stats.

Auth System Designer

$9.99

or 50 cr

Auth is where one wrong early decision becomes a security incident with your name on it — JWTs chosen for sessions because a tutorial used them, refresh token rotation implemented wrong, RBAC bolted on after the fact

Expert API architect to design, review, and audit REST, GraphQL, and event-driven API specifications.

Professional API design and review skill for REST, GraphQL, and event-driven architectures.

Audit SQL and ORM queries for security vulnerabilities, N+1 performance issues, and indexing anti-patterns.

Production-ready ARQ background workers for FastAPI with Redis heartbeats, cron jobs, and hardened systemd units.

Supabase RLS Doctor

$19

or 95 cr

Audit your Supabase project for the row-level-security mistakes that quietly expose data: tables without RLS, policies that resolve to true, leaked service-role keys, missing auth.uid() checks, open storage buckets, overbroad grants, and migration drift. A local, read-only scan plus a full review checklist, each finding with severity, evidence, and a fix. No database changes without confirmation.

Professional technical SEO crawler and site auditor for deep architectural analysis and issue detection.

Ask your AI agent for the Hikvision footage you need, then walk away while it downloads.

Resiliently extract brand palettes and fonts from any URL using a 4-tier strategy with SSRF protection.

Scaffold a multi-model 6-step pipeline to automatically turn prospect URLs into live, branded demo websites.

Deploy a structured, long-term memory palace for AI agents on Raspberry Pi via MCP and ChromaDB.

Implement Clerk Organizations multi-tenancy with local DB syncing, RBAC mapping, and secure webhook handling.

Synced shared screen for a Three.js multiplayer room: a SharedScreen client (YouTube on a canvas texture, clock-based playback tracking, 3D positional audio), a screenHandlers Colyseus pattern (setUrl, play, pause, seek, volume, stop, controlled-by tracking), an optional yt-dlp plus ffmpeg proxy, and an optional Puppeteer BrowserManager. Field-verified from nex-vr-room.

Enterprise-grade WhatsApp Business Cloud API integration for Python with session window management and webhook security.

The complete Nex Price Radar Chrome extension (real shipped Manifest V3 source): track price history across Amazon, Bol.com, Coolblue, AliExpress, Zalando and more, and see at a glance whether the current price is high, low, or average. Reads prices locally from the page, stores history in the browser, makes no external API calls. Ships the full extension plus the dev loop, customization guide, and Web Store packaging steps. No build step.

Free, direct translation across 100+ languages using Meta M2M-100 on Cloudflare Workers AI.

Connect your agent to the Steam Web API to fetch player data, game libraries, and achievement statistics.

Architect, build, and review production-grade Discord bots with structured guidance on commands, security, and scaling.