Backend & APIs · For developers

Email sending patterns for transactional and marketing emails.

cohen-liel/hivemind

A skill your agent uses when designing a new REST or GraphQL API, reviewing an API spec before implementation, setting team API standards, or migrating REST to GraphQL.

coco-research/coco

Hunt JWT cryptographic failures — alg:none signature-stripping and RS256→HS256 key-confusion that let an attacker forge a token for any identity (e.g.

elementalsouls/Claude-BugHunter

Create and manage Kibana connectors for Slack, PagerDuty, Jira, webhooks, and more via REST API or Terraform.

aspectrr/deer

Methodology for systematically designing and generating CLI tool argument parser structures.

revfactory/harness-100

Pulls Bigdata.com (RavenPack) financial and news data via the official bigdata-client SDK and /v1/ REST endpoints — structured financials, prices, analyst estimates, entity-sentiment series…

daymade/claude-code-skills

Guidance for secure remote VM management in Azure using Azure Bastion combined with Defender for Cloud just-in-time (JIT) VM access.

vinayaklatthe/microsoft-security-skills

Write Stripe code against what the API does today — plan the product shape, confirm every parameter from Stripe's own docs and schemas, and keep the agent in a sandbox.

superset-sh/superset

A skill your agent uses when ツール導入と GCP / OAuth の設定、新規 YouTube チャンネル開設、既存チャンネル取り込み、config 再生成、または YouTube 側設定同期を行うとき。「セットアップして」「環境構築」「新チャンネル」「既存チャンネル」「チャンネル取り込み」「config…

daiki-beppu/youtube-automation

Wires Grok speech-to-speech into an app's own microphone and audio playback over a realtime WebSocket, replacing an STT-LLM-TTS cascade or OpenAI Realtime.

cursor/plugins

Execute ES|QL (Elasticsearch Query Language) queries, use when the user wants to query Elasticsearch data, analyze logs, aggregate metrics, explore data, or create charts and dashboards from ES|QL…

elastic/agent-skills

Load CSV and JSON files into Elasticsearch indices using the bulk API and explicit mappings when field types matter.

elastic/agent-skills

Scans Algorand TEAL and PyTeal contracts for 11 known vulnerability patterns, such as unchecked rekeying and fees, and reports each with severity and a fix.

trailofbits/skills

Scans Cairo and StarkNet contracts for 6 vulnerability patterns, including felt252 overflow, L1 to L2 messaging faults, address conversion and signature replay.

trailofbits/skills

Scores a smart contract or blockchain codebase across 9 maturity categories with evidence, then delivers a scorecard and a priority-ordered improvement roadmap.

trailofbits/skills

Scans Cosmos SDK modules and CosmWasm contracts for consensus-critical flaws that can halt a chain, lose funds or diverge state, using parallel scanning agents.

trailofbits/skills

Reviews a smart contract project against Trail of Bits development guidelines, covering documentation, architecture, upgradeability, implementation quality, dependencies and tests.

trailofbits/skills

Token integration and implementation analyzer based on Trail of Bits' token integration checklist.

trailofbits/skills

Scans TON (The Open Network) smart contracts for 3 critical vulnerabilities including integer-as-boolean misuse, fake Jetton contracts, and forward TON without gas checks.

trailofbits/skills

Build browser or server unified cross-chain USDC balances with Circle App Kit or standalone Unified Balance Kit.

circlefin/skills

Django security best practices, authentication, authorization, CSRF protection, SQL injection prevention, XSS prevention, and secure deployment configurations.

affaan-m/ECC

Coordinate frontend/backend or service-to-service work through one authoritative machine-checkable contract (OpenAPI, AsyncAPI, Protocol Buffers, or JSON Schema), with generated consumer types and…

affaan-m/ECC

Django + Celery async task patterns — configuration, task design, beat scheduling, retries, canvas workflows, monitoring, and testing.

affaan-m/ECC

FastAPI best practices covering project structure, Pydantic v2 schemas, dependency injection, async handlers, authentication, authorization, transactional service layers, and testing with httpx and…

affaan-m/ECC

Create reproducible, cross-platform (macOS/Linux) development environments with Flox, a declarative Nix-based environment manager.

affaan-m/ECC

Readiness checklist for homelab VLAN segmentation, local DNS filtering (Pi-hole, AdGuard Home), and WireGuard-style remote access.

affaan-m/ECC

Java coding standards for Spring Boot and Quarkus services: naming, immutability, Optional usage, streams, exceptions, generics, CDI, reactive patterns, and project layout.

affaan-m/ECC

Laravel testing strategies with PHPUnit, Pest, model factories, HTTP tests, Sanctum authentication testing, mocking, and coverage.

affaan-m/ECC

Guides agents through integrating transactional email sending via Mailtrap's Email API, including sandbox testing, domain verification, and API authentication.

affaan-m/ECC

Quarkus security implementation patterns: JWT and OIDC authentication, @RolesAllowed RBAC and SecurityIdentity checks, Bean Validation and custom validators, parameterized Panache queries, BCrypt…

affaan-m/ECC

Redis data structure patterns, caching strategies, distributed locks, rate limiting, pub/sub, and connection management for production applications.

affaan-m/ECC

A skill your agent uses when you have a confirmed on-chain vulnerability hypothesis and must demonstrate it with a passing proof-of-concept — author an attacker contract or crafted instruction…

mtarcure/claude-vibe-squad

Manages MongoDB Atlas Stream Processing (ASP) workflows. An agent skill from mongodb/agent-skills.

mongodb/agent-skills

Symptom-to-cause triage playbook for Flowfile (core/worker/kernel/frontend/AI) — covers "no such table" DB cascades (two distinct causes), import-time Alembic migration corruption, silent…

Edwardvaneechoud/Flowfile

This skill provides comprehensive instructions for interacting with the Raindrop.io bookmarks service via its REST API using curl and jq.

intellectronica/agent-skills

The public-API contract SmithyDotNet-generated code must match against the shipping AWS SDK for .NET - what must match vs.

aws/aws-sdk-net

Comprehensive backend development skill for building scalable backend systems using NodeJS, Express, Go, Python, Postgres, GraphQL, REST APIs.

davila7/claude-code-templates

Interact with Google Calendar - list calendars, view events, create/update/delete events, and find free time.

sanjay3290/ai-skills

Manage secrets and certificates in Azure Key Vault. An agent skill from sickn33/agentic-awesome-skills.

sickn33/agentic-awesome-skills

Integracao completa com Instagram via Graph API. An agent skill from sickn33/agentic-awesome-skills.

sickn33/agentic-awesome-skills

Coleta e consulta dados de leiloeiros oficiais de todas as 27 Juntas Comerciais do Brasil.

sickn33/agentic-awesome-skills

Operate Moralis EVM wallet and token reads through UXC with a curated OpenAPI schema, API-key auth, and wallet-intelligence guardrails.

holon-run/uxc

Azure AI Voice Live SDK for .NET. An agent skill from microsoft/skills.

microsoft/skills

Azure Event Grid SDK for .NET. An agent skill from microsoft/skills.

microsoft/skills

Azure Event Hubs SDK for .NET. An agent skill from microsoft/skills.

microsoft/skills

Azure Identity library for .NET. An agent skill from microsoft/skills.

microsoft/skills

Connect to Azure Database for PostgreSQL Flexible Server from Node.js/TypeScript using the pg (node-postgres) package.

microsoft/skills

Azure Service Bus SDK for .NET. An agent skill from microsoft/skills.

microsoft/skills