Fizzlayer is a physical layer for AI agents. You connect sensors from a Raspberry Pi, ESP32, phone, Home Assistant, or any HTTPS device, and the readings flow into one dashboard. You can ask Fizz, the built-in assistant, about your data in plain English, or give your own agent access through MCP. You can set threshold and silence alerts, and paid plans add phone calls. It suits hobbyists, home labs, growers, and teams monitoring sites like cold storage.

• Flexible Device Pairing: Connect a Raspberry Pi or other Linux machine with the fizz CLI, pair a phone through a browser link, or post readings from any HTTPS-capable device. Sample sensor streams let you explore before your hardware arrives.
• Fizz Assistant: Ask questions about your stored readings in plain language, typed or spoken. Fizz can also add sensors, walk you through pairing, and create alerts when you ask.
• MCP Server for Your Agents: Give Claude Code, Cursor, VS Code, or another MCP client its own token. Your agent can then list sensors, pull readings, check alerts, and create alerts if you allow it.
• Phone Call Alerts: On paid plans, Fizz calls a paired US number when an alert fires, so you don't miss a problem when you're away from the dashboard.
• Wide Sensor Coverage: Track water flow and leaks, temperature, humidity, gas, pressure, sound, radio signal strength, and phone motion. Custom metrics cover anything else.
• Home Assistant Integration: Push selected Home Assistant entities into Fizzlayer with a 6-digit pairing code. Your Home Assistant instance doesn't need to be reachable from the internet.

• Free Tier to Start: The Hobbyist plan costs $0 and includes 3 devices, unlimited sample sensors, MCP access, and dashboard alerts.
• Agent Access on Every Plan: MCP agent access comes with all tiers, so you can connect your own AI agent to live sensor data without upgrading.
• Answers Based on Real Data: Fizz answers from your actual stored readings, not guesses. You get specific answers about what your sensors recorded.
• Low-Cost Paid Tiers: Tinkerer is $10/month for 10 devices and Pro is $25/month for 50 devices. Both include phone call alerts.
• Flexible Deployment Options: Deploy Fizzlayer using your own Vercel and Supabase accounts, giving you greater control over your hosting environment and data infrastructure.
• Separate Device and Agent Credentials: Each sensor has its own revocable API key, while AI agents use individual access tokens. This makes it easier to manage and revoke access.

• Phone Alerts Are US-Only and Paid: Calls need a paired US number and a Tinkerer plan or higher. Free-plan alerts stay on the dashboard, and international users can't get call alerts.
• Tight Assistant Credits on Lower Tiers: Each message to Fizz uses one credit. The free plan includes 10 credits a month and Tinkerer includes 100, which limits heavy chat use unless you query data through your own MCP agent.
• MQTT Limited to WebSocket on Hosted Service: The hosted service doesn't offer plain MQTT over TCP port 1883. Existing devices that expect standard MQTT may need changes or a self-hosted setup.

• Home Leak and Climate Monitoring: Put water leak, temperature, and humidity sensors around your house and set threshold alerts. If a pipe leaks while you're out, a phone call tells you right away.
• Greenhouse Tracking: Growers can track temperature and humidity across a greenhouse and ask Fizz how conditions changed overnight. Silence alerts warn you when a sensor stops reporting.
• Home Lab Server Health: Run the fizz CLI on a Raspberry Pi or Linux server to report CPU temperature, load, memory, and disk usage. Set alerts so you hear about overheating or full disks before something fails.
• Giving Coding Agents Physical Context: Connect Claude Code or Cursor to Fizzlayer over MCP so your agent can read real sensor data while you build. It can pull readings, check alerts, and set new thresholds as part of your workflow.
• Cold Storage and Site Monitoring: Teams in cold storage, logistics, or on factory floors can watch temperature and equipment across sites. Enterprise plans add custom device limits and included phone alerts.
• Extending Home Assistant: Push your existing Home Assistant sensors into Fizzlayer to get AI-driven questions and agent access. Your Home Assistant setup can stay off the public internet.