Terrarium MCP Server (io.github.nelsonsantryhkd/terrarium)

This MCP server provides a workflow for human visual review of agent-built HTML. It publishes HTML artifacts, lets reviewers add anchored browser comments tied to exact passages, then pulls that feedback over MCP so the agent can push fixes and iterate until approved.

🛠️ Key Features

Publish artifacts: host the HTML your agent builds
Pull anchored comments: collect human feedback tied to exact passages
Push fixes: send updated HTML back for further review
Iterate until approved

🚀 Use Cases

Human-in-the-loop review for agent-generated HTML
Comment-driven editing where feedback targets specific passages in the rendered page

⚡ Developer Benefits

Feedback anchored to exact passages supports precise revisions
Round-trip automation: review in the browser, feedback over MCP, fixes pushed back

⚠️ Limitations

The described workflow depends on Terrarium hosting for HTML review

🔧 Setup Requirements

Install via the plugin marketplace: nelsonsantryhkd/terrarium-plugin
Install Terrarium plugin: terrarium@terrarium
Configure TERRARIUM_PAT from tryterrarium.com/connect

Install

code

/plugin marketplace add nelsonsantryhkd/terrarium-plugin
/plugin install terrarium@terrarium

Then mint a token at tryterrarium.com/connect and make it available as TERRARIUM_PAT:

export TERRARIUM_PAT="samus_pat_…"

(Or just ask your agent to set Terrarium up — the bundled skill walks it through the whole flow, including sending you to /connect for the token.)

What it ships

MCP server (.mcp.json) — Terrarium's remote server over Streamable HTTP with 7 tools: list_artifacts, publish_artifact, get_artifact, pull_comments, push_version, reply_to_comment, resolve_comment.

Skill (skills/terrarium/) — teaches the publish → review → fix loop, including the terrarium-feedback/1 payload, expectedVersion freshness, and comment-thread etiquette.

Install

Remote endpoint

Streamable HTTP

Hosted server - connect over the network, no local install.

url

https://www.tryterrarium.com/api/mcp

Add to VS Code Add to Cursor

claude_desktop_config.json

json

{
  "mcpServers": {
    "terrarium": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-remote",
        "https://www.tryterrarium.com/api/mcp"
      ]
    }
  }
}

Desktop config is stdio-only; this bridges via mcp-remote. Native remote: Settings > Connectors.

Terrarium

Terrarium MCP Server (io.github.nelsonsantryhkd/terrarium)

🛠️ Key Features

🚀 Use Cases

⚡ Developer Benefits

⚠️ Limitations

🔧 Setup Requirements

Terrarium plugin for Claude Code

Install

What it ships

The protocol

Install

Remote endpoint

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