Chrome extension · Claude & ChatGPT

Write it now.
Let it fire on time.

Fuse holds a message you've already typed and sends it the exact second you choose, down to the reset moment on a rate limit. Keep the tab open, and Fuse does the waiting for you.

claude.ai — Q3 planning doc
Can you rewrite section 3 with the numbers from the sheet I sent earlier?
Rate limit resets at detected — 2:45:00 PM
Send time 6s
ready to arm ✓ sent, verified in composer

A staged demo — the real thing watches your actual composer.

The idea

You know the exact second. You just can't sit there for it.

Claude and ChatGPT both cap how many messages you can send in a stretch of time. Once you hit it, you get a message telling you precisely when the limit lifts, and then it's on you to be at your keyboard at that moment, message ready, refreshing until the button turns clickable again.
Fuse skips the sitting around. Write your next message whenever you actually have the thought, hand the timing to Fuse, and close your laptop if you want to. It'll still be there when the send goes through.
What Fuse is watching
ConversationQ3 planning doc
Composer state1 message queued
Follow-up messagenone set
Retry windowup to 90s
If you switch chatsschedule cancels
How it works

Four steps, and then you can walk away.

01

Type your message

Write it in the composer on claude.ai or chatgpt.com like normal. Just don't hit send.

02

Open Fuse

It shows the conversation name and ID, so you can confirm it's watching the right chat.

03

Pick the moment

Set a time yourself, or let Fuse read the rate-limit message and offer the reset time in one click.

04

Arm it, keep the tab open

Fuse clicks send at the moment you chose, and keeps trying for up to 90 seconds if the first click doesn't land.

Everything it does

One job: get your message out at the right second.

Detection

Reads the rate-limit message

Fuse recognizes the "try again at" text Claude and ChatGPT show you, and offers that exact time with one click. No copying a timestamp by hand.

Reliability

Retries until it actually sends

A single click isn't always enough, clocks drift by a second or two. Fuse verifies the message left the composer and keeps trying for up to 90 seconds if it didn't.

On-page

Countdown pill

A small timer sits right on the page so you can see how long is left without reopening the extension.

Overview

One dashboard, every tab

See every schedule you've armed across every open tab, with live countdowns and a one-click cancel on each.

Sequencing

Optional follow-up message

Queue a second message to send automatically once the first reply finishes streaming. Handy for a quick two-step prompt.

Safety

Cancels if you switch chats

Change conversations after arming a schedule and Fuse cancels it on its own, rather than risk sending to the wrong chat.

The hard part

A click at the right moment isn't the same as a message that's actually sent.

A browser timer that fires a click sounds simple until you notice the details: your system clock can drift, the send button can be disabled for a beat while the page settles, and a click that lands a frame too early just does nothing.
So Fuse doesn't fire once and hope. After clicking, it checks whether the composer actually emptied out, the way it does after a real send. If it didn't, Fuse clicks again, on a short interval, for up to 90 seconds, until the message is confirmed gone.
2:45:00.0 — click sent
2:45:00.4 — composer still full, retrying
2:45:01.1 — composer still full, retrying
2:45:01.8 — composer empty, send confirmed
Privacy

Fuse doesn't talk to a server, because it doesn't have one.

Nothing leaves your browser

Scheduling, detection, and retries all happen locally in the tab. Fuse never makes a network call of its own.

No analytics, no accounts

There's nothing to sign into and nothing tracking what you schedule or how often you use it.

Only reads what it needs

Fuse checks whether your composer is empty or not. It doesn't read the content of your conversations otherwise.

Stop refreshing for the reset.

Write your message once. Let Fuse pick the moment to send it.

Add to Chrome — it's free