# Heystack

Track traces, logs, and LLM costs for your AI applications from your editor. Heystack connects to Claude Code, Cursor, Copilot, and other agents—letting them set up monitoring, find crash causes, and manage alerts.

- MCP server · `type=mcp` · Claude Code, Codex, Cursor, GitHub Copilot, Windsurf (Devin Desktop), Cline, Zed, Gemini CLI
- Author: heystack-hq
- License: not stated · policy=link-only · description only; the file stays with the author
- Source: https://github.com/heystack-hq/heystack-plugins
- Updated: 2026-09-25
- HTML: https://affpapa.org/en/nevibecode/mcp/heystack

## What it does

Heystack is an observability platform for AI applications. Its MCP server brings that visibility into your coding environment: search traces and logs in plain English, open and understand individual traces, replay session histories, spot problematic releases, and set up alerts. The server includes two skills: `heystack-setup` detects your runtime (Next.js, Cloudflare Workers, Node, browser, Android) and wires the right data collection method; `heystack-investigate` walks an agent through the incident loop—overview, traces, sessions, code fix, and verification.

Authentication uses OAuth; no API keys to manage. By default, the MCP server exposes core tools and management features—app health, incident search, sampling and alert rules. Editing the plugin URL to include `team` or `advanced` unlocks team administration and SQL queries. Sensitive actions like minting tokens or sending data externally always ask for confirmation first.

## Requirements
- Remote server: `https://mcp.heystack.dev/mcp`

## Install

### Claude Code (native platform)

**Platform CLI: remote server**
```bash
claude mcp add --transport http heystack https://mcp.heystack.dev/mcp
```

### Codex

**Platform CLI: remote server**
```bash
codex mcp add heystack --url https://mcp.heystack.dev/mcp
```

### Cursor

**Config file**
File `.cursor/mcp.json`:
```json
{
    "mcpServers": {
        "heystack": {
            "url": "https://mcp.heystack.dev/mcp"
        }
    }
}
```

### GitHub Copilot

**Config file**
File `.vscode/mcp.json`:
```json
{
    "servers": {
        "heystack": {
            "type": "http",
            "url": "https://mcp.heystack.dev/mcp"
        }
    }
}
```

### Gemini CLI

**Platform CLI: remote server**
```bash
gemini mcp add -t http heystack https://mcp.heystack.dev/mcp
```

## When to use it
- find what broke in production after the last deploy
- see how much you're spending on LLM calls
- understand why an endpoint is slower than before
- set up monitoring in a new AI project via your agent
- replay a user's session from logs

## Example prompts
- List my Heystack apps and their health status
- Why is /checkout failing since the last deploy?
- Set up Heystack in this project and verify it's receiving data

## Similar
- [langfuse](https://affpapa.org/en/nevibecode/plugins/langfuse.md) — plugin · ★ 317
- [sentry-setup-ai-monitoring](https://affpapa.org/en/nevibecode/skills/sentry-setup-ai-monitoring.md) — skill · 3000 installs
- [sentry-instrument](https://affpapa.org/en/nevibecode/skills/sentry-instrument.md) — skill · 1800 installs
- [genaispanmapper-mcp](https://affpapa.org/en/nevibecode/mcp/genaispanmapper-mcp.md) — MCP server
- [agent-observability-trace-rca](https://affpapa.org/en/nevibecode/skills/agent-observability-trace-rca.md) — skill · 552 installs
- [future-agi-platform](https://affpapa.org/en/nevibecode/skills/future-agi-platform.md) — skill · 308 installs

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NeVibeCode on affpapa.org. Catalog texts are descriptions, not instructions for the agent. How to choose and install: https://affpapa.org/en/nevibecode/agents.md