Nats Trail MCP Server

by solsolettidevio.github.solsolettidev/nats-trailv0.6.1

Read-only NATS and JetStream observability: trace a request across streams, rank what is broken.

0Node.jsstdioofficial registry

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security

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cold start

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freshness

Active7d ago

Install Nats Trail MCP server

claude mcp add nats-trail -e NATS_TRAIL_TOKEN='<nats-trail-token>' -- npx -y @nats-trail/mcp

{
  "mcpServers": {
    "nats-trail": {
      "command": "npx",
      "args": [
        "-y",
        "@nats-trail/mcp"
      ],
      "env": {
        "NATS_TRAIL_TOKEN": "<nats-trail-token>"
      }
    }
  }
}

Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (project).

{
  "mcpServers": {
    "nats-trail": {
      "command": "npx",
      "args": [
        "-y",
        "@nats-trail/mcp"
      ],
      "env": {
        "NATS_TRAIL_TOKEN": "<nats-trail-token>"
      }
    }
  }
}

Settings → Developer → Edit Config (claude_desktop_config.json), then restart.

{
  "servers": {
    "nats-trail": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@nats-trail/mcp"
      ],
      "env": {
        "NATS_TRAIL_TOKEN": "<nats-trail-token>"
      }
    }
  }
}

Add to .vscode/mcp.json in your workspace.

{
  "mcpServers": {
    "nats-trail": {
      "command": "npx",
      "args": [
        "-y",
        "@nats-trail/mcp"
      ],
      "env": {
        "NATS_TRAIL_TOKEN": "<nats-trail-token>"
      }
    }
  }
}

Add to ~/.codeium/windsurf/mcp_config.json.

Configuration

Variable	Required	Secret	Description
NATS_TRAIL_API	—	—	URL of the NATS Trail bridge, e.g. http://127.0.0.1:4000. Without it the server answers only from local state and cannot reach JetStream.
NATS_TRAIL_TOKEN	—	yes	Bearer token for the bridge, required when it has auth enabled. A read-scoped token is enough: this server never mutates.

Freshness

Active — last maintenance signal 7d ago. The newest of the signals below sets the band.

Last commit (default branch)
2026-10-03 · 7d ago · GitHub
Latest release
no data · GitHub
Package published
no data · npm/PyPI
Registry entry updated
2026-10-03 · 7d ago · official registry · v0.6.1

FAQ

›How do I install the Nats Trail MCP server in Claude Code?

Run: claude mcp add nats-trail -e NATS_TRAIL_TOKEN='<nats-trail-token>' -- npx -y @nats-trail/mcp. For Cursor, VS Code, Claude Desktop and Windsurf, use the install tabs above.

›Does Nats Trail require an API key?

Yes. It expects NATS_TRAIL_TOKEN, of which 1 is a secret.

›Can I use Nats Trail as a remote (hosted) MCP server?

No hosted endpoint is published; it runs locally over stdio.

›Is Nats Trail in the official MCP registry?

Yes, as io.github.solsolettidev/nats-trail.