# Preflight (MCP server)

> Preflight is an MCP server that adds developer tools to AI assistants such as Claude Desktop, Claude Code and Cursor. New Relic MCP server for observing AI coding assistants (Claude Code, Cursor, Copilot, etc.). It has 51 GitHub stars, is released under the Apache-2.0 license and runs locally with npx -y @newrelic/preflight.

Preflight Observability for AI Coding Assistants Your AI coding assistant makes hundreds of decisions every session — what to read, what to edit, when to run commands. But you can't see any of it. You know it was fast, but was it efficient? You got a PR merged, but how much did it cost? You fixed a bug, but did it get stuck in a loop first?

## Key facts

| Fact | Value |
|---|---|
| Repository | https://github.com/newrelic-experimental/preflight |
| GitHub stars | 51 |
| License | Apache-2.0 |
| Language | TypeScript |
| Transport | stdio |
| Packages | npm: @newrelic/preflight |
| Remote URL | none |
| Needs API key | no |
| Official | yes |
| Works with | Claude Desktop, Claude Code, Cursor, VS Code |
| Category | Developer tools |
| Latest release | v1.59.0 (Oct 7, 2026) |
| Last commit | Oct 7, 2026 |
| MCP registry name | io.github.newrelic-experimental/preflight |

## Install

### Claude Desktop (claude_desktop_config.json)

```json
{
  "mcpServers": {
    "preflight": {
      "command": "npx",
      "args": [
        "-y",
        "@newrelic/preflight"
      ],
      "env": {
        "NEW_RELIC_LICENSE_KEY": "your-value"
      }
    }
  }
}
```

Settings > Developer > Edit Config. macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\. Restart Claude Desktop afterwards.

### Claude Code

```sh
claude mcp add --env NEW_RELIC_LICENSE_KEY=your-value --transport stdio preflight -- npx -y @newrelic/preflight
```

### Cursor (.cursor/mcp.json)

```json
{
  "mcpServers": {
    "preflight": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@newrelic/preflight"
      ],
      "env": {
        "NEW_RELIC_LICENSE_KEY": "your-value"
      }
    }
  }
}
```

Project file; use ~/.cursor/mcp.json to enable it in every project.

### VS Code (.vscode/mcp.json)

```json
{
  "inputs": [
    {
      "type": "promptString",
      "id": "new_relic_license_key",
      "description": "NEW_RELIC_LICENSE_KEY",
      "password": true
    }
  ],
  "servers": {
    "preflight": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@newrelic/preflight"
      ],
      "env": {
        "NEW_RELIC_LICENSE_KEY": "${input:new_relic_license_key}"
      }
    }
  }
}
```

Config formats checked against the official docs on 2026-10-07.

## Environment variables

- `NEW_RELIC_LICENSE_KEY` (secret): New Relic ingest license key. Optional: without it Preflight runs local-only with the dashboard at localhost:7777.
- `NEW_RELIC_ACCOUNT_ID`: New Relic account id, used for dashboard and alert deployment. Optional.

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---

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