# perplexity-comet-mcp MCP Server

Bridge Claude Code with Perplexity Comet for autonomous browsing and tab management

**Publisher claimed.** No tool list reported, and Pod has not connected to this server.

## Status

Pod has not dialled perplexity-comet-mcp yet, so everything on this page is what its publisher reported rather than what we observed. Registries describe servers; they do not connect to them. Until a check runs, treat the tool list below as a claim.

## Connect

Published as `perplexity-comet-mcp` on npm. Runs locally.

## Known issues

**9 problems reported by people outside the maintainer team.** Issues filed by the project's own owners, members and collaborators are excluded — those are release checklists and internal refactors, not things that will go wrong for you. Showing 6.

### Most discussed

### Comet Remote MCP Support

Is it possible to use windows comet as remote mcp server?
I want to connect it via Linux n8n to Windows comet as comet is not supported on Linux boxes. So connecting comet as remote mcp server is the only choice left.

Please help!

[Read the thread](https://github.com/RapierCraft/Perplexity-Comet-MCP/issues/1) · 2026-01-18 · closed · external user · 11 comments

### fix(security): strip fake BEGIN UNTRUSTED markers from page content

## Problem

`wrapUntrustedPageContent` in `src/index.ts` strips `[END UNTRUSTED nonce=` from content to prevent fake closing markers, but does **not** strip `[BEGIN UNTRUSTED PAGE CONTENT nonce=` from content.

An attacker-controlled page could inject a fake opening marker inside the wrapped content to confuse downstream parsers that look for nested marker pairs.

**Source**: PR #17 review — https://github.com/RapierCraft/Perplexity-Comet-MCP/pull/17#issuecomment-4764326187

**Confidence**: CONF

[Read the thread](https://github.com/RapierCraft/Perplexity-Comet-MCP/issues/25) · 2026-06-22 · closed · external user · 8 comments

### fix: validateSelector allowlist permits raw newlines via backslash-s (review finding — PR #32)

## Problem

The `validateSelector()` function in `src/upload-validator.ts:220` uses `\s` in its character allowlist, which matches raw newlines (`\n`) and carriage returns (`\r`) in addition to spaces and tabs. Raw newlines in a CSS selector are not valid CSS and could produce unexpected behavior in error messages that echo the selector (e.g., `src/cdp-client.ts:1625`: `No element found matching selector: ${selector}`).

**Source**: PR #32 — fix(security): validate selector parameter before DOM.

[Read the thread](https://github.com/RapierCraft/Perplexity-Comet-MCP/issues/34) · 2026-06-22 · closed · 7 comments

### fix: http-bridge handleUpload missing selector validation at handler boundary (review finding — PR #32)

## Problem

`src/http-bridge.ts:607` passes a user-supplied `selector` directly to `cometClient.uploadFile()` without calling `validateSelector()` at the HTTP handler boundary. The `cdp-client.ts` inner guard (added in PR #32) fires and protects the CDP layer, but the HTTP bridge handler lacks the same tool-boundary defense-in-depth that `src/index.ts` received in PR #32.

**Source**: PR #32 — fix(security): validate selector parameter before DOM.querySelector
**Agent**: General Security (SEC)
*

[Read the thread](https://github.com/RapierCraft/Perplexity-Comet-MCP/issues/33) · 2026-06-22 · closed · 7 comments

### fix: expand denylist to block /proc subtree (review finding — PR #28)

## Problem

`validateUploadPath()` in `src/upload-validator.ts` blocks `/proc/self/environ` explicitly but does not block the broader `/proc/` prefix, leaving `/proc/self/maps` (memory layout), `/proc/self/fd/*` (open file descriptors), and `/proc/1/environ` (root process environment) accessible.

**Source**: PR #28 — fix(security): address upload path validation vulnerabilities from PR #14 review
**Agent**: Security Domain
**Confidence**: POSSIBLE
**Severity**: MEDIUM
**Review comment**: https:

[Read the thread](https://github.com/RapierCraft/Perplexity-Comet-MCP/issues/29) · 2026-06-22 · closed · 7 comments

### Most recent

### comet_screenshot tool not working - CDP captureScreenshot type mismatch

## Description

The `comet_screenshot` tool is not working properly. When called, it fails to return screenshot data.

## Technical Analysis

### Root Cause
The issue is in `src/cdp-client.ts` at line 1113:

```typescript
async screenshot(format: "png" | "jpeg" = "png"): Promise<ScreenshotResult> {
  this.ensureConnected();
  return this.client!.Page.captureScreenshot({ format }) as Promise<ScreenshotResult>;
}
```

**Problems identified:**
1. `ensureConnected()` is not being awaited, which mean

[Read the thread](https://github.com/RapierCraft/Perplexity-Comet-MCP/issues/2) · 2026-01-24 · closed · external user · 5 comments

[See all 9 reports Pod holds for perplexity-comet-mcp](/mcp/perplexity-comet-mcp/issues).

## Firsthand observations

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