Perplexity Full MCP

An MCP server that gives AI agents live research and image generation capabilities by automating a logged-in Perplexity Pro browser session.

No API keys needed. No rate limits. Just a browser with your Pro account.

What It Does

Two tools for any MCP client (Claude Code, Cline, Continue, Hermes Agent, etc.):

The tools require zero setup after first login — just configure, log in once, and use.

Related MCP server: Comet MCP

How It Works

Your AI Agent → MCP Client → perplexity-mcp (Python)
                                  │
                          ┌───────┴───────┐
                          │  Playwright    │
                          │  launches      │
                          │  Chromium      │
                          │  headless      │
                          └───────┬───────┘
                                  │
                          Navigates to perplexity.ai
                          Loads saved session cookies
                          Types your query into #ask-input
                          Presses Enter
                                  │
                    ┌─────────────┴─────────────┐
                    │ research                  │ image_gen
                    │                           │
              Waits for "Stop"            Waits for <img>
              button → disappeared        from S3 bucket
              Extracts answer text         Downloads image
              + citations links            Saves to disk
                    │                           │
                    └─────────────┬─────────────┘
                                  │
                          Returns result dict
                          Closes browser (ephemeral)

Each tool call is isolated — a fresh Chromium launches, does its work, and closes. Nothing persists in memory between calls.

Requirements

• Python 3.10+

• Perplexity Pro account

• Chromium browser installed on your system

Quick Install

# 1. Get the code
git clone <repo-url> perplexity-mcp
cd perplexity-mcp

# 2. Create virtual environment & install dependencies
python3 -m venv .venv
.venv/bin/pip install -e .

# 3. Verify Chromium is available
which chromium-browser || which google-chrome || echo "Need Chromium"

Setup Guide

Step 1 — Install dependencies

cd perplexity-mcp
python3 -m venv .venv
.venv/bin/pip install -e .

This installs: FastMCP, Playwright, Pillow, httpx, python-slugify, python-dotenv, and playwright-stealth.

Step 2 — Find your Chromium

The server auto-detects Chromium from these sources (checked in order):

1. PLAYWRIGHT_CHROMIUM_PATH environment variable (if set)

2. Snap path: /snap/chromium/current/usr/lib/chromium-browser/chrome

3. Default Playwright browser (if you ran playwright install chromium)

If auto-detection fails, set the path manually:

export PLAYWRIGHT_CHROMIUM_PATH=/usr/bin/chromium-browser

To verify everything is working:

.venv/bin/python -c "
import asyncio
from playwright.async_api import async_playwright
from config import SYSTEM_CHROMIUM
async def t():
    async with async_playwright() as p:
        b = await p.chromium.launch(headless=True, executable_path=SYSTEM_CHROMIUM)
        page = await (await b.new_context()).new_page()
        await page.goto('https://example.com')
        print('Chromium works! Title:', await page.title())
        await b.close()
asyncio.run(t())
"

Step 3 — (Optional) Configure image output directory

Edit .env or set the environment variable:

OUTPUT_ROOT=~/Pictures/perplexityImages

Step 4 — Start the server

.venv/bin/perplexity-mcp

This starts the MCP server on stdio. It will check for saved cookies and either skip to ready state or prompt you to log in.

MCP Client Configuration

Claude Code / Cline / Continue

Add to claude_desktop_config.json:

{
  "mcpServers": {
    "perplexity": {
      "command": "/absolute/path/to/perplexity-mcp/.venv/bin/perplexity-mcp",
      "args": [],
      "env": {
        "OUTPUT_ROOT": "/home/youruser/Pictures/perplexityImages"
      }
    }
  }
}

Hermes Agent

Add to ~/.hermes/config.yaml:

mcp_servers:
  perplexity:
    command: "/absolute/path/to/perplexity-mcp/.venv/bin/perplexity-mcp"
    args: []
    env:
      DISPLAY: ":0"
      OUTPUT_ROOT: "/home/youruser/Pictures/perplexityImages"
    supports_parallel_tool_calls: true

Or via CLI:

hermes mcp add perplexity \
  --command "/absolute/path/to/perplexity-mcp/.venv/bin/perplexity-mcp" \
  --env "DISPLAY=:0" \
  --env "OUTPUT_ROOT=/home/youruser/Pictures/perplexityImages"

Then run /reload-mcp in your Hermes session.

⚠️ DISPLAY note: If Chromium doesn't appear on your screen during login, your MCP client isn't forwarding the DISPLAY environment variable to subprocesses. Always include DISPLAY: ":0" in the env section. Find your display value with echo $DISPLAY.

First-Time Login

The first time the server connects to Perplexity, it opens a visible Chromium window.

What you'll see:

============================================================
  Perplexity Login Required
============================================================
  A browser window will open. Please log in to your
  Perplexity Pro account.
============================================================

What to do:

1. A Chromium window opens to perplexity.ai

2. Log in with your Perplexity Pro credentials

3. If prompted with a Cloudflare CAPTCHA, solve it

4. If running in a terminal — go back to the terminal and press Enter

5. If running under an MCP client — just close the browser after logging in. The server detects the login automatically within 2 minutes and saves cookies

After successful login, your session cookies are saved to storage/perplexity_auth.json. All subsequent tool calls run headless — no visible windows.

Using the Tools

Once the server is running and authenticated, your AI agent has access to both tools.

perplexity_research

Ask the agent to research a topic:

Can you research the latest breakthroughs in solid-state batteries?

What happens: Chromium launches headless → types your query into Perplexity → waits for the answer to finish generating → extracts the markdown answer and all citation links → closes browser → returns to your agent.

Result: The agent receives the answer text plus up to 30 source citations with titles and URLs.

perplexity_generate_image

Ask the agent to create an image:

Generate a photorealistic cyberpunk city at night with neon lights and rain.

What happens: Chromium launches headless → types your prompt → waits for the image to appear (30-120s) → downloads it from Perplexity's S3 → saves it to your configured output directory → returns the file path.

Result: The agent gets the file path, image dimensions, and a temporary URL. The image is saved to disk at the configured OUTPUT_ROOT.

Configuration Reference

Image path pattern

{OUTPUT_ROOT}/{first-3-words-slugified}/{full-prompt-slugified}_{timestamp}.{ext}

Example: prompt "a cute cat wearing a funny hat" → /home/user/Pictures/perplexityImages/a-cute-cat/a-cute-cat-wearing-a-funny-hat_2026-06-28-143022.png

If a file already exists, a counter suffix is appended (_1, _2, ...). No files are ever overwritten.

Troubleshooting

Tools Reference

perplexity_research(query: str) -> dict

Agent best practices:

• Be specific: "What are the economic impacts of AI on healthcare in 2026?" not "Tell me about AI"

• Inline citation markers [1], [2] appear in the answer text

• Break complex multi-part questions into separate calls

• Citations are from the Answer tab panel on Perplexity

perplexity_generate_image(prompt: str) -> dict

Agent best practices:

• Describe subject, style, lighting, colors, composition

• "A serene Japanese garden in spring with cherry blossoms, koi pond, digital art" > "a garden"

• Reference file_path to use the image (URL may expire)

• Generation takes 30-120 seconds

• On failure, retries once automatically

Project Structure

perplexity-mcp/
├── pyproject.toml          # Python package config + dependencies
├── .env                    # OUTPUT_ROOT config (user-specific, gitignored)
├── .gitignore
├── README.md
├── config.py               # Paths, env vars, Chromium auto-detection
├── browser.py              # Playwright manager: launch, stealth, auth, cookie persist
├── server.py               # FastMCP server with lifespan lifecycle
└── tools/
    ├── research.py         # Type query → wait for stop → extract answer + citations
    └── image_gen.py        # Type prompt → detect S3 img → download → save to disk

Runtime files (created on first use):

storage/perplexity_auth.json        # Playwright session cookies (gitignored)
~/Pictures/perplexityImages/        # Generated images (configurable via OUTPUT_ROOT)

Tech Stack

For AI Agents

When using these tools in your workflow:

1. Research first, generate second — research gives context for better image prompts

2. Run them in parallel — supports_parallel_tool_calls: true is set in Hermes config

3. Reference file_path for images — the URL may expire, but the local file persists

4. Catch errors gracefully — session expiry, region blocks, and timeouts all raise typed errors

5. Tools are ephemeral — each call opens and closes Chromium (~3-5s overhead)