Loopback MCP Server

Feedback bus for coding agents: pin feedback on any web app, an agent fixes it, the pin turns green

Local serverstdioGo

What is the Loopback MCP Server?

Feedback bus for coding agents: pin feedback on any web app, an agent fixes it, the pin turns green

What you get

Loopback is the interactive feedback layer between real product usage and your coding agents: one script tag makes the app you're running locally commentable (Vercel-toolbar-style toolbar, element-anchored pins; deployed public sites go via the /ingest rails instead — see surface compatibility), every pin auto-captures the functional context — failing requests with response bodies, console trail, the route journey that led there, LLM run metadata, typed repro steps — and lands in one project-tagged queue that Claude Code, Codex, and Gemini CLI all work over MCP.

  • One instance, all projects. — Every item is tagged with a project slug in
  • One queue, all agents. — MCP is the interface, so Claude Code, Codex, and
  • A pin is an anchor, not a scope. — Pin a "broken" contact form and the

More MCP options

Compare MCP servers by category, or browse hosted MCP servers if you prefer an endpoint over a local process.

Recorded tools

Check the linked publisher documentation and your connected client's tool list. Names and availability can vary with the server version and account permissions.

ToolWhat it does
loopback_submit_feedbackFile an item: project, type ui\
loopback_list_feedbackFilter (project/route/status/type/severity/source/assignee) + paginate (total/has_more/next_offset); severity-then-newest
loopback_get_feedbackFull item: all context + linked change + comment trail
loopback_update_feedbackCorrect an item after filing: title, body, severity, type, project, or route — re-rank a severity, fix a mis-guessed type, move it to the right project
loopback_claim_feedback**Atomic** claim; a conflict names the holder; force to take over; open/triaged → in_progress
loopback_update_statusopen → triaged → in_progress → fixed → verified \
loopback_add_commentRoot-cause notes, questions, reasoning trail
loopback_link_changeMerge repo/branch/commit/pr_url/diff_summary onto the item
loopback_resolve_feedbackClose as verified (confirmed for real) or wontfix
loopback_get_statsproject × status counts

How to install the Loopback MCP Server

{
  "mcpServers": {
    "loopback-server": {
      "command": "npx",
      "args": ["-y", "loopback-mcp-server"],
      "env": {
        "LOOPBACK_HOST": "your-value",
        "LOOPBACK_TOKEN": "your-value"
      }
    }
  }
}

Add to claude_desktop_config.json, then restart Claude Desktop.

Configuration

VariableDescriptionRequired
LOOPBACK_HOSTEndpoint or connection string the server talks to.Optional
LOOPBACK_TOKENCredential the server authenticates with.Yes

Example prompts to try

  • “Use Loopback to loopback submit feedback.”
  • “Use Loopback to loopback list feedback.”
  • “Use Loopback to loopback get feedback.”

Frequently asked questions

Feedback bus for coding agents: pin feedback on any web app, an agent fixes it, the pin turns green Confirm the tools offered by your installed version in the connected client. Tool availability and permissions depend on the server and account configuration.