comet_ask
Send a prompt to Comet/Perplexity and wait for the complete response (blocking). Ideal for tasks requiring real browser interaction (login walls, dynamic content, filling forms) or deep research with agentic browsing.
LABSCO SUMMARY
Research runs in a browser that is already signed in, so the pages behind a login are in scope.
The blocking ask covers most of what you would want and returns the finished answer rather than a stream to babysit; poll and stop exist for the agentic runs long enough to wander, which is a real failure mode when the model is browsing on your behalf. Mode is the lever most worth using deliberately — research and labs behave differently enough from plain search that setting it belongs in the same turn as the question.
What it is
A server that drives the Comet browser, sending prompts to Perplexity inside it and returning the completed response.
What you get
- A prompt sent and the complete response waited for, optionally in a new chat, with a timeout you set
- Agentic runs monitored through a status poll and stopped mid-flight when they go off track
- The Perplexity mode switched between search, research, labs and learn, or read back when you are unsure which is active
- A screenshot of the current page
- The browser connection established on demand, starting Comet if it is not already running
Requirements
Comet installed on the machine, since comet_connect starts it and every other tool acts inside it, and a Perplexity session in that browser — routing through a real browser is what makes login walls and dynamic pages reachable in the first place.
Setup effort
One command — npx -y comet-mcp
USE CASES
01
Researching something that sits behind a login
Connect to the browser, which starts it if it is not already running, and ask the question there — the session in that browser is what makes the gated pages reachable.
02
Keeping a long agentic run on track
Poll for status while the run works, and stop it when the trajectory stops resembling the question you asked.
03
Matching the depth of the answer to the question
Set the mode before asking rather than after: research and labs behave differently from a plain search, and calling it without a mode reports which one is active.
04
Seeing what the browser is actually looking at
Capture the current page when the text of an answer is not enough to tell you where the run has ended up.
6 tools
Counted once with only startup setup. Other versions, modes or optional credentials may expose a different list.
comet_connect
Connect to Comet browser (auto-starts if needed)
comet_mode
Switch Perplexity search mode. Modes: 'search' (basic), 'research' (deep research), 'labs' (analytics/visualization), 'learn' (educational). Call without mode to see current mode.
comet_poll
Check agent status and progress. Call repeatedly to monitor agentic tasks.
comet_screenshot
Capture a screenshot of current page
comet_stop
Stop the current agent task if it's going off track
BEFORE YOU INSTALL
What to know first
Tools you get
6 tools when we connected.
Requires
- npx on PATH
- Node.js 18+
CONTEXT COST
Light Standing cost
Rated by the size of the 6 tool definitions that ride along on every turn, not by how many there are
INSTALLATION
Connect your client
Add the block to your client, or run the command directly.
Server setup
Configuration file
JSON
{
"mcpServers": {
"comet-mcp": {
"command": "npx",
"args": [
"-y",
"comet-mcp"
]
}
}
}npx
TERMINAL
npx -y comet-mcp
