ShroomPenAdd to Chrome
ShroomPen - Reply, rewrite, fix grammar, translate with single extension | Product Hunt

ShroomPen · BYOK AI writing assistant for ChromeWrite with everything you have open

ShroomPen is a free AI writing extension for Chrome. Reply, rewrite, fix grammar or translate where you type, using your own AI provider or a local model and context from the tabs you pick.

https://help.example.com/inbox/4833
Dana Whitfield#4833 Renewal question · via emailAwaiting reply
Dana Whitfield · 09:02

Hi Sam, renewal's next month and my team is on the fence. Priya asked me to put a case together before the budget call.

Harbor CRM · Acme Corp

Call with Dana Whitfield

Agents spend too much time finding past replies and checking ticket history before answering. Dana wants to see time saved per ticket before the budget call.

Details
  • Pilot terms agreed with Priya Natarajan: 3 seats, 30 days, no setup fee, cancel anytime.
  • Backlog: 860 open tickets, median first reply 9 hours.
  • Team plan, 12 seats, renews 14 October 2026.
Lantern Desk · Features

Answer repeat questions once.

Every customer request in one shared inbox, so your team answers from what it already knows instead of digging for it.

Details
  • Saved replies: answer repeat questions from one approved snippet.
  • Ticket history: every past reply sits next to the reply box.
  • Pilot report: first-reply time, before and after.

The idea

You type the gist. It finds the details.

Names, order numbers, couriers, dates. ShroomPen takes them from the page you are on and the tabs you pick, then writes the reply in the field.

HHelpdesk · Chat #4821This tab · chat headerCustomer: Sarah
HHelpdesk · Chat #4821This tab · order panelOrder #4821
Your reply
Hi Sarah, sorry about the delay. I checked order #4821: UPS has it in transit and the latest scan moves delivery to Thursday 3 September. If it hasn't arrived by Thursday evening, reply here and we'll send a replacement straight away.

You typed: hi sorry about that. looks delayed. I think should arrive tomorrow but not sure

UUPS · TrackingTab · ups.com/trackStatus: in transit
MYour delivery updateTab · mail from UPSNew date: Thu 3 Sep

Four actions

Reply, rewrite, fix, translate

Whatever is in the field is what it works on. Pick an action to see the before and the after.

helpdesk.example.com/chats/4821
Your reply
Before
hi sorry about that. looks delayed. I think should arrive tomorrow but not sure

Press Reply

After
Hi Sarah, sorry about the delay. I checked order #4821: UPS has it in transit and the latest scan moves delivery to Thursday 3 September. If it hasn't arrived by Thursday evening, reply here and we'll send a replacement straight away.

Reply Answers the message in front of you. Your rough note is the brief.

The facts

Pick the tabs, it pulls the facts

Invoices, docs, notes, a CRM page. Tick the ones that hold the details and the text is built from them. Untick one and it loses what only that tab knew.

Open tabs

docs.example.com/proposals/acme-support

DraftSupport team proposal

Proposal draft
Our product helps your support team save time by keeping customer requests in one shared inbox, turning repeat answers into saved replies, and showing ticket history before agents respond. That matches your notes: agents lose time hunting for past replies and context, so the proposal can promise faster, more consistent support without vague claims.

Where it fits

Should ShroomPen write it?

One question decides it.

Pick something to write

A support reply has to be right, and the order, the courier and the date are in the ticket and the tracking tab.

Something to write
Does it have to sound only like you?
Write it yourself
Write withShroomPen

The rules

Five rules it never breaks

Built so you can use it at work without asking twice.

  1. 01

    Reads only what you pick

    The page and your tabs are read when you attach them, each time. Nothing in the background.

  2. 02

    Writes only where you are

    The field you are typing in is the only one it changes, and only when you press a button.

  3. 03

    Skips passwords and card numbers

    Password, card, bank and one-time-code fields are left out. Turn it off on any site you like.

  4. 04

    Talks only to your provider

    Requests go from Chrome to the provider you set up, or to a model on your own computer.

  5. 05

    No ShroomPen server

    No account and no extension telemetry. Your text goes to your provider and nowhere else.

The long version: how ShroomPen handles your data.

Get started

Free. The only bill is your model's.

Bring a key from OpenRouter, OpenAI, Anthropic or Gemini, or run a model on your own computer with Ollama or LM Studio and pay nothing at all. The provider setup guide walks through each option.

  1. 1InstallAdd ShroomPen to Chrome.
  2. 2ConnectSign in with OpenRouter, paste a key, or point it at your local server.
  3. 3WriteClick into any field. ShroomPen is in the corner.

ShroomPen

Receipt · no account needed

Chrome extension$0.00
ShroomPen accountnone
ShroomPen servernone
Ads and trackingnone
Markup on your model$0.00

Your modelyour provider*

· Ollama / LM Studio on your computer: $0

· OpenRouter free models: $0


Total to ShroomPen$0.00

* Billed by OpenRouter, OpenAI, Anthropic or Google directly, at their prices, on your own account.

FAQ

Before you install

Using it

Privacy

Models and cost

What is ShroomPen?

ShroomPen is a free BYOK AI writing assistant extension for Chrome. It replies, rewrites, fixes grammar and translates in the field you are typing in, using your own AI provider or a model on your own computer. You install it from the Chrome Web Store.

Ready when you are

One click to install!

  • No ShroomPen account
  • Your own provider
  • Nothing sent until you press a button

Want to check the setup first? Read the provider guide.