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io.github.RapierCraft/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 io.github.RapierCraft/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

6 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 5.

Most discussed

fix(security): validate selector parameter before DOM.querySelector

Problem

The selector parameter in comet_upload is passed through src/index.ts into cometClient.uploadFile(resolvedPath, selector) without any validation. Inside uploadFile in src/cdp-client.ts, the raw selector string is passed directly to client.DOM.querySelector({ selector }).

While CSS selectors are not a code execution surface, a pathologically long or deeply nested selector can cause the renderer to spend significant CPU time parsing — a denial-of-service against the Come

Read the thread · 2026-06-22 · closed · external user · 7 comments

fix(security): validate domain parameter in comet_tabs

Problem

The domain parameter accepted by comet_tabs (switch/close actions) in src/index.ts is passed to findTabByDomain() without any validation:

  1. No length limit — an arbitrarily long string will be processed
  2. Echoed in responses — No tab found for domain: ${domain} returns attacker-controlled input to the MCP client. If these messages are ever rendered as HTML in a future UI, this is a stored XSS vector.
  3. HTTP bridge — same parameter is entirely unvalidated in

Read the thread · 2026-06-22 · closed · external user · 7 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 · 2026-06-22 · closed · external user · 8 comments

fix(security): address upload path validation vulnerabilities from PR #14 review

Context

PR #14 (fix/upload-allowlist) was merged via PR #15 (superset). The security review identified several vulnerabilities in validateUploadPath and validateTabId that shipped to main. These need follow-up fixes.

Source: PR #14 review comment — https://github.com/RapierCraft/Perplexity-Comet-MCP/pull/14#issuecomment-4764314368

Findings

1. CRITICAL — TOCTOU Race in validateUploadPath (src/index.ts)

existsSync(filePath) → realpathSync(filePath) → `statSync

Read the thread · 2026-06-22 · closed · external user · 7 comments

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:

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 · 2026-01-24 · closed · external user · 5 comments

See all 6 reports Pod holds for io.github.RapierCraft/perplexity-comet-mcp.

Firsthand observations

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