---
title: "Polar Signals MCP integration for LuumenAI"
url: "https://www.luumen.ai/integrations/polar-signals-mcp/"
entity: SoftwareIntegration
category: "AI & automation"
audience: "SRE, DevOps, platform engineering, IT operations"
---

# Polar Signals MCP integration for LuumenAI

Read continuous profiling data to find where the time actually goes

## What LuumenAI can do with Polar Signals MCP

LuumenAI connects to Polar Signals MCP with an API token and exposes 8 tools (8 write). Reads answer immediately; writes are shown as a plan and require approval by default, configurable per tool by an administrator.

## Key facts

- Authentication: API token
- Tools available: 8 tools (8 write)
- Plan: available on all plans
- Category: AI & automation

## About Polar Signals MCP with LuumenAI

Ask why a service got slower and work from real profiles. Polar Signals MCP covers projects, profile types, labels, flame graphs, flat tables, sandwich views for a single function, and per-line source data. Every tool here is classified as a write, so calls are previewed, approved, and audited by default. Luumen authenticates with an API key.

## Example tools

Write and destructive (8 in total, approval required by default):

- `POLAR_SIGNALS_MCP_LIST_PROJECTS` — List all projects accessible to the current user.
- `POLAR_SIGNALS_MCP_QUERY_PROFILE_FLAMEGRAPH` — Return a flame graph as a breadth-first call tree.
- `POLAR_SIGNALS_MCP_QUERY_PROFILE_LABELS` — Get available label names for a specific profile type.
- `POLAR_SIGNALS_MCP_QUERY_PROFILE_LABEL_VALUES` — List the values a profiling label takes (e.g.
- `POLAR_SIGNALS_MCP_QUERY_PROFILE_SANDWICH` — Show the calling context around a specific function: which functions call it (callers) and which functions it calls (callees).
- `POLAR_SIGNALS_MCP_QUERY_PROFILE_SOURCE` — Retrieve per-line profiling data for a specific source file.
- `POLAR_SIGNALS_MCP_QUERY_PROFILE_TABLE` — Query profiling data as a flat table of functions sorted by cumulative time.
- `POLAR_SIGNALS_MCP_QUERY_PROFILE_TYPES` — ProfileTypes returns the list of available profile types.

## Frequently asked questions

### How does LuumenAI connect to Polar Signals MCP?

Authorize once with API token. Luumen lists the scopes each action needs before you approve the connection, and credentials never appear in the chat.

### Can LuumenAI change things in Polar Signals MCP on its own?

Read actions answer immediately. Anything that writes is shown as a plan and requires approval by default. Administrators configure that per tool.

### Is there an audit trail?

Every call to Polar Signals MCP — read or write, approved or declined — is recorded with the actor, the input, and the result.

Full page: https://www.luumen.ai/integrations/polar-signals-mcp/