Yavio

Product Analytics for MCP Apps and ChatGPT Apps

Open-source. Self-hosted. See how users actually use your AI tools.

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Alpha (v0.1) — Yavio is under active development. APIs, configuration, and database schemas may change between releases without notice or migration paths. Do not use in production without pinning exact versions.

What is Yavio?

Yavio is the analytics and visibility layer for MCP servers and ChatGPT Apps. It captures how AI platforms (ChatGPT, Claude, Cursor, Windsurf, VS Code, etc.) invoke your tools and how users interact with your widgets — tool calls, conversions, funnels, errors, retention — with a 3-line SDK integration and a full analytics dashboard.

The entire platform is open source (MIT) and self-hosted via Docker Compose. Cloud hosting is coming soon.

Quick Start (Self-Hosted)

1. Start the platform

git clone https://github.com/teamyavio/yavio.git
cd yavio

# Generate .env with random secrets
./scripts/setup-env.sh

# Start all services (migrations run automatically on first start)
docker compose up -d

The dashboard is at http://localhost:3000, ingestion API at http://localhost:3001.

2. Create a project

Open the dashboard, register an account, create a workspace and project, then copy your API key.

3. Install the SDK

npm install @yavio/sdk

4. Wrap your MCP server

import { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js";
import { withYavio } from "@yavio/sdk";

const server = withYavio(
  new McpServer({ name: "my-app", version: "1.0.0" }),
  {
    apiKey: "yav_your_key_here",
    endpoint: "http://localhost:3001/v1/events",
  }
);

That's it. Every tool call is now tracked automatically.

Using the CLI

You can also use the CLI for setup and platform management:

npm i -g @yavio/cli

# Interactive SDK setup — creates .yaviorc.json
yavio init

# Platform management
yavio up          # Start services
yavio down        # Stop services (data preserved)
yavio status      # Health check and stats
yavio logs        # Tail service logs
yavio doctor      # Diagnose setup issues

Features

• Zero-config MCP instrumentation — withYavio() wraps your MCP server and captures every tool call, latency, errors, and platform automatically
• User identification — .identify(userId, traits) ties events to known users for retention, cohorts, and per-user analytics
• Funnel tracking — .step(), .track(), .conversion() for custom funnel stages and business events
• Cross-layer correlation — a single trace ID stitches server-side tool calls and browser widget interactions into one combined funnel
• Widget SDK — useYavio() React hook auto-captures 12 interaction types (clicks, scrolls, forms, rage clicks, performance, etc.)
• Full analytics dashboard — overview KPIs, per-tool breakdowns, funnels, user paths, error analysis, live event feed
• Platform detection — auto-detects which AI platform invoked your tool (ChatGPT, Claude, Cursor, Windsurf, VS Code)
• PII stripping — automatic removal of emails, credit cards, SSNs, and phone numbers at both SDK and server layers
• Multi-tenant workspaces — teams, roles (owner/admin/member/viewer), invitations, multiple projects per workspace
• Self-hosted — run the full stack on your own infrastructure with docker compose up

Architecture

┌───────────────────────────┐       ┌────────────────────────────────────────┐
│  Your App                 │       │  Yavio Platform                        │
│                           │       │                                        │
│  ┌─────────────────────┐  │       │  ┌──────────────────────────────────┐  │
│  │ @yavio/sdk          │  │       │  │ Ingestion API (Fastify)          │  │
│  │ withYavio(server)   │  │ HTTP  │  │                                  │  │
│  │                     │──┼─┐     │  │ Auth · Rate limiting             │  │
│  │ Auto-captures:      │  │ │ events │ Validation · PII stripping       │  │
│  │  · tool calls       │  │ ├────►│  └───────────────┬──────────────────┘  │
│  │  · connections      │  │ │     │                  │ write               │
│  │  · resources        │  │ │     │                  ▼                     │
│  │  · prompts          │  │ │     │  ┌───────────────────┐  ┌──────────┐  │
│  └─────────────────────┘  │ │     │  │ ClickHouse        │  │ Postgres │  │
│                           │ │     │  │ Analytics store    │  │ App data │  │
│  ┌─────────────────────┐  │ │     │  └─────────┬─────────┘  └────┬─────┘  │
│  │ Widget (React)      │  │ │     │            │ read             │ read   │
│  │ useYavio()          │──┼─┘     │            ▼                 ▼        │
│  │                     │  │       │  ┌──────────────────────────────────┐  │
│  │ Auto-captures:      │  │       │  │ Dashboard (Next.js)              │  │
│  │  · clicks, scrolls  │  │       │  │ Analytics · Teams · Projects     │  │
│  │  · forms, nav       │  │       │  └──────────────────────────────────┘  │
│  │  · rage clicks      │  │       │                 ▲                      │
│  └─────────────────────┘  │       │                 │                      │
│                           │       └─────────────────┼──────────────────────┘
└───────────────────────────┘                         │
                                        Browser ──────┘

Component	Description
@yavio/sdk	Server-side withYavio() proxy + React useYavio() hook
@yavio/cli	SDK setup (yavio init) and self-hosted management (yavio up/down/status/logs/doctor)
Ingestion API	High-throughput Fastify service — auth, validation, PII strip, ClickHouse write
Dashboard	Next.js web app with auth, workspaces, projects, and 7 analytics views
ClickHouse	Analytics event storage (ReplacingMergeTree, built-in dedup)
PostgreSQL	Application data (users, workspaces, projects, API keys)

SDK Usage

User Identification

Tie events to known users for retention and per-user analytics:

import { yavio } from "@yavio/sdk";

server.registerTool("checkout", { inputSchema: { items: z.array(z.string()) } }, async (params) => {
  yavio.identify("user_123", { plan: "pro", company: "Acme" });
  yavio.conversion("purchase", { value: 99 });

  return { content: [{ type: "text", text: "Order placed." }] };
});

Funnel Steps

Track progression through multi-step flows:

server.registerTool("search", { inputSchema: { query: z.string() } }, async ({ query }) => {
  yavio.step("search_initiated", { queryLength: query.length });
  const results = await performSearch(query);
  yavio.step("results_found", { count: results.length });

  return { content: [{ type: "text", text: `Found ${results.length} results` }] };
});

Custom Events and Conversions

yavio.track("feature_used", { feature: "export", format: "pdf" });
yavio.conversion("subscription_upgrade", { value: 99, currency: "USD" });

Widget SDK (React)

Track user interactions in ChatGPT App widgets:

import { useYavio } from "@yavio/sdk/react";

function BookingWidget() {
  const yavio = useYavio();

  const handleBook = (booking) => {
    yavio.step("room_selected", { roomType: booking.type });
    yavio.conversion("booking_completed", { value: booking.price });
  };

  return <button onClick={() => handleBook(room)}>Book</button>;
}

The widget SDK auto-captures clicks, scrolls, form interactions, navigation, performance metrics, rage clicks, and more.

Configuration

The SDK resolves config in this order:

1. Code options — withYavio(server, { apiKey, endpoint })
2. Environment variables — YAVIO_API_KEY, YAVIO_ENDPOINT
3. Config file — .yaviorc.json (auto-discovered via directory walk-up)
4. No-op — if no API key is found, the SDK does nothing (zero overhead)

Self-Hosting Requirements

Component	Minimum	Recommended
CPU	2 cores	4+ cores
RAM	4 GB	8+ GB
Disk	20 GB	100+ GB
Docker	v24+	Latest stable
Docker Compose	v2.20+	Latest stable

Tech Stack

Layer	Technology
Monorepo	pnpm + Turborepo
Language	TypeScript (strict)
Ingestion	Fastify 5
Dashboard	Next.js (App Router)
Analytics DB	ClickHouse
App DB	PostgreSQL + Drizzle ORM
Auth	NextAuth.js v5
UI	shadcn/ui + Tailwind
Testing	Vitest
Linting	Biome

Project Structure

packages/
  shared/       Shared types, validation schemas, error codes
  db/           Drizzle ORM schema, ClickHouse client, migrations
  ingest/       Fastify ingestion API
  sdk/          Server SDK + React widget SDK
  dashboard/    Next.js analytics dashboard
  cli/          CLI for setup and platform management
  docs/         Documentation site (Fumadocs)

Contributing

We welcome contributions! Please read CONTRIBUTING.md before submitting a PR.

Join our Discord to discuss ideas and get help.

Security

Found a vulnerability? Please report it responsibly — see SECURITY.md. Do not open a public issue.

License

MIT — see LICENSE.

Copyright (c) 2026 Yavio GmbH