Packages

Buttondown — simple, developer-friendly newsletter platform with a REST API for managing subscribers, sending newsletters, and tracking email analytics — purpose-built for writers and indie creators.

High-performance C++ L4/L7 proxy and service mesh foundation. Envoy is the sidecar and edge proxy powering Istio, AWS App Mesh, and Consul Connect. It handles service discovery via xDS APIs, provides observability (metrics, traces, logs) per connection, manages retries, circuit breaking, and TLS. In agent architectures, Envoy provides the networking layer that handles all inter-service traffic uniformly.

Official Firebase JavaScript/TypeScript SDK (modular v9+ API). Provides browser and React Native access to Firebase services: Authentication (20+ sign-in methods), Firestore (NoSQL realtime database), Realtime Database, Cloud Storage, Cloud Functions, Analytics, Hosting, and Remote Config. The modular API uses tree-shakeable function imports to minimize bundle size. Powers millions of mobile and web applications as Google's mobile/web backend platform.

Futu/Tiger Brokers MCP server enabling AI agents to access Futu OpenAPI data — fetching Hong Kong and US stock quotes, retrieving order book data and historical prices, accessing portfolio information, and integrating Futu's brokerage data into agent-driven investment analysis workflows for Hong Kong and US markets.

Dependabot is a GitHub-native dependency update and security alerting feature accessed entirely via the GitHub REST API — there is no standalone Dependabot API; agents use GitHub API endpoints under /repos/{owner}/{repo}/dependabot/ to manage alerts, auto-dismissals, and update configurations.

Google Apps Script MCP server enabling AI agents to interact with Google Apps Script — executing scripts, managing script projects, triggering automation workflows, and integrating Google Workspace automation into agent-driven productivity and business process automation workflows that leverage Google's scripting platform for Sheets, Docs, Gmail, and other Google services.

Basecamp/37signals' HTML-over-the-wire approach to building fast, real-time web apps with minimal JavaScript. Hotwire combines Turbo (handles navigation without full page reloads via Turbo Drive, partial page updates via Turbo Frames, and server-pushed HTML via Turbo Streams) and Stimulus (lightweight JS controller framework for sprinkles of behavior). Rails 7's default frontend approach. Enables rich UIs with server-side rendering and WebSocket real-time updates.

Infermedica symptom assessment REST API for digital health platforms, telehealth providers, and health insurance companies to integrate AI-powered symptom checking, medical triage, patient intake, and clinical decision support — enabling automated patient symptom collection, differential diagnosis suggestion, care pathway recommendation, and risk stratification through Infermedica's clinical AI engine built on probabilistic diagnostic reasoning. Enables AI agents to manage symptom assessment for adaptive symptom question and evidence collection automation, handle condition suggestion for differential diagnosis probability ranking automation, access triage recommendation for care level (self-care, primary care, ER) recommendation automation, retrieve risk factor collection for medical history and risk factor intake automation, manage explain management for diagnostic reasoning explanation automation, handle specialist recommendation for appropriate medical specialist routing automation, access lab test suggestion for relevant laboratory test recommendation automation, retrieve follow-up for next-symptom question sequencing and adaptive interview automation, manage mention parsing for NLP symptom extraction from patient text automation, and integrate Infermedica with EHR, telehealth, and patient portal systems for digital health triage automation.

Kubernetes-native policy engine for validating, mutating, and generating Kubernetes resources. Kyverno policies are written in YAML (not Rego/OPA) — no new policy language to learn. Runs as a Kubernetes admission controller: blocks non-compliant resources at deployment time, auto-remediates existing resources, and generates new resources based on triggers. CNCF graduated. Powers policy enforcement for security (no root containers), compliance (required labels), and operational standards (resource limits) in Kubernetes clusters.

Cloud-native streaming SQL database that maintains incrementally updated materialized views over streaming data. Materialize ingests from Kafka, PostgreSQL CDC, and other sources, and maintains SQL views in real-time — queries are always instant because results are pre-computed. PostgreSQL-compatible wire protocol allows standard SQL clients. Unlike Flink, Materialize uses standard SQL without custom operators.

Email sending library for Node.js using SMTP, SES, or other transports. Nodemailer handles email composition (HTML/text, attachments, inline images, calendar events) and transport (SMTP, AWS SES, Sendmail). The standard Node.js library for email — used before transactional email APIs existed and still relevant for custom SMTP configurations, self-hosted mail, or when avoiding external email APIs.

Sentinel Hub satellite imagery processing REST API for geospatial developers, environmental analysts, and Earth observation platforms to access, process, and analyze multispectral satellite imagery from Sentinel-2, Landsat, MODIS, Planet, and other EO data sources — enabling cloud-free image compositing, time-series analysis, custom band math, and large-scale geospatial data processing through Sentinel Hub's cloud-based EO infrastructure (Planet Labs company). Enables AI agents to manage imagery request for satellite image retrieval automation, handle evalscript processing for custom band calculation automation, access time-series for change detection automation, retrieve statistical analysis for area monitoring automation, manage batch processing for large-scale coverage automation, handle cloud masking for quality filtering automation, access catalog for scene search automation, retrieve NDVI/NDWI for vegetation and water index automation, manage OGC services for GIS platform integration automation, and integrate Sentinel Hub with GIS platforms, agriculture monitoring, and environmental reporting for Earth observation automation.

Official Go SDK for Sentry error monitoring and performance tracking. Captures panics, errors, and performance transactions in Go applications and reports them to Sentry's error tracking platform. Provides automatic panic recovery, context enrichment (user, request, tags), and performance monitoring with distributed tracing. Essential for production Go service observability.

JWT authentication for Django REST Framework — provides access/refresh token pair authentication with configurable expiry, rotation, and blacklisting. Simple JWT features: TokenObtainPairView (POST /api/token/ with username/password returns access+refresh), TokenRefreshView (POST /api/token/refresh/), TokenVerifyView, token blacklisting via OutstandingToken/BlacklistedToken DB tables, custom token claims (add user data to payload), token rotation on refresh, sliding tokens, JWTAuthentication backend for DRF, and SIMPLE_JWT settings configuration. Standard JWT implementation with refresh token rotation for agent API authentication.

Serverless HTTP message queue that delivers webhooks to any URL with built-in retry, delay, scheduling, and fan-out — no broker infrastructure required.

Provides real-time, forecast, and historical weather data along with astronomy information, air quality indices, and severe weather alerts for any location worldwide.

Extended Python pickling for distributed computing — serializes Python objects that standard pickle cannot, including lambdas, closures, locally defined functions, and class definitions. cloudpickle features: cloudpickle.dumps()/loads() API compatible with pickle, serializes lambda functions (not picklable with standard pickle), closures capturing local variables, inner functions, dynamically defined classes, generator functions, functools.partial with lambda args, and is used internally by Ray, Dask, PySpark, and joblib. Essential for sending Python callables across process boundaries.

The official Redis client library for Go. go-redis (formerly go-redis/redis) provides a type-safe API for all Redis commands, connection pooling, Redis Cluster and Sentinel support, pipelining, transactions (MULTI/EXEC), Pub/Sub, and Redis Streams. The de-facto standard Go Redis client used in production systems.

MCP server that allows AI assistants to create, manage, and monitor n8n workflows through natural language. Supports multi-instance management across dev/staging/production environments with 17 tools covering workflow CRUD, execution monitoring, tag management, and credential handling.

MCP server that helps AI models understand your local Vite/Nuxt application better during development. Provides two packages: nuxt-mcp-dev (Nuxt module) and vite-plugin-mcp (Vite plugin) that expose app context to MCP-connected AI assistants.