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Home/Servers/Heystack

Heystack

by dev.heystack

Observability for AI apps: investigate traces, logs, LLM usage, replays and crashes; manage alerts.

Power your agent

Add this server

The publisher's own URL. Not a PlugMCP endpoint.

Server URL
https://mcp.heystack.dev/mcp
Provider
Add in Claude

Claude opens with the name and URL filled in. You still confirm it there.

Claude Code
claude mcp add --transport http dev.heystack-heystack https://mcp.heystack.dev/mcp

Run in a terminal.

Claude Desktop
{
  "mcpServers": {
    "dev.heystack-heystack": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-remote",
        "https://mcp.heystack.dev/mcp"
      ]
    }
  }
}

claude_desktop_config.json

Step-by-step: add this in Claude

Remote URL or a command on your machine? How the two installs differ

Run on PlugMCP

Host a copy with our keys and logs.

A new server you create. It is not this listing's official endpoint. Use the publisher install when you want their URL and their credentials.

Launch

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Questions

How do I install Heystack?
Copy the http config for Cursor, Claude Desktop, Claude Code, or VS Code on this page. It uses the publisher's install, not a PlugMCP proxy.
Does Heystack need an API key?
No required environment variable is listed on this record.
What transport does Heystack use?
Heystack is reached over HTTP.
When was Heystack last checked?
Last checked 2026-10-16. Observability for AI apps: investigate traces, logs, LLM usage, replays and crashes; manage alerts.

Observability for AI apps: investigate traces, logs, LLM usage, replays and crashes; manage alerts.

Heystack plugins

Plugins for Heystack — observability + security for AI apps — so your coding agent can set up Heystack, investigate incidents, and manage your workspace from your editor.

Install (Claude Code)

/plugin marketplace add heystack-hq/heystack-plugins
/plugin install heystack@heystack

Then run /mcp to sign in with Heystack and pick your organization. Try: "list my Heystack apps", "why is /checkout failing since the last deploy?", or "set up Heystack in this project and verify it's receiving data".

What you get

heystack (recommended) — the all-in-one plugin:

  • Hosted MCP server at https://mcp.heystack.dev/mcp (connected with ?toolsets=all): app health, search traces & logs in plain English, open and explain traces, session stories and replays, issues and crashes with the suspect release, gen-AI usage & cost, a one-call incident dossier (heystack_investigate); plus apps, ingest keys, sampling/replay config, alert rules, team and tokens. Sign in with Heystack (OAuth) — no keys to paste. Full reference: https://heystack.dev/docs/mcp
  • heystack-setup skill — detects the runtime (Next.js, Cloudflare Workers/Agents, Node, browser, Android) and wires the correct @heystack/otel entry or OTLP path; with the MCP server it creates the app and key itself and verifies data arrives with heystack_verify_setup.
  • heystack-investigate skill — the investigation loop: overview → dossier → traces/sessions → fix in code → verify; when to change issue status or create alerts; never destructive without your confirmation.

heystack-setup — the setup skill on its own (no MCP server), kept for existing installs: /plugin install heystack-setup@heystack.

Other agents

  • Cursor / VS Code / Codex / Gemini CLI / Claude.ai connect to the same MCP URL — see https://heystack.dev/docs/mcp for one-click links and commands.
  • The skills are plain Agent Skills files and are also served raw at https://heystack.dev/heystack-setup.md and https://heystack.dev/heystack-investigate.md. The root plugin.json / mcp.json / skills/ follow the cross-vendor Agent Plugins layout.
  • Every docs page is available as Markdown: https://heystack.dev/llms.txt

Layout

.claude-plugin/marketplace.json           # Claude Code marketplace (plugins: heystack, heystack-setup)
plugins/heystack/                         # all-in-one: .mcp.json + skills/
plugins/heystack-setup/                   # skill-only (legacy)
plugin.json · mcp.json · skills/          # Agent Plugins (cross-vendor) layout of the `heystack` plugin

Source of truth for the skills is the heystack monorepo (packages/setup-skill, packages/investigate-skill); this repo is a mirror.

How do I install Heystack?
Copy the http config for Cursor, Claude Desktop, Claude Code, or VS Code on this page. It uses the publisher's install, not a PlugMCP proxy.
Does Heystack need an API key?
No required environment variable is listed on this record.
What transport does Heystack use?
Heystack is reached over HTTP.
When was Heystack last checked?
Last checked 2026-10-16. Observability for AI apps: investigate traces, logs, LLM usage, replays and crashes; manage alerts.

No tool list yet. Remote servers get one after the first health check.

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