Now in Private Beta

WRITTEN ONCE.
POSTED EVERYWHERE.

SocialBoy plugs into Claude and turns your newsletter into LinkedIn, X, Bluesky, and Threads posts that don't feel like cross-posts. Brand-aware visuals included.

Built by Shape — makers of ProductAI. In private beta with newsletter writers.

Lives inside Claude

Newsletter in. Four platform-perfect posts out.

SocialBoy is an MCP connector. Drop your newsletter into Claude — get LinkedIn, X, Bluesky, and Threads in your voice.

Substack
Beehiiv
Ghost
+Socialboy
LinkedIn
X
Bluesky
Threads
Features

Everything you need to ship four posts a week

From newsletter to published — without writing the same idea four different ways.

Drop in your newsletter

Paste, URL, or email forward — Substack, Beehiiv, Ghost, Kit, Buttondown. RSS optional, never required.

Voice profiles per platform

Your LinkedIn voice isn't your X voice. Tune each one separately, refine over time, store them once.

Brand-aware AI visuals

Eye-catching images for LinkedIn, square crops for Bluesky, landscape for X — generated per post in your brand colors.

Lives inside Claude

One click installs SocialBoy as an MCP connector. Generate, schedule, and publish without leaving chat.

Schedule or publish now

Plan a week ahead or post in two clicks. We handle the platform-specific quirks.

Performance that loops back

See what's working. Use it to refine voice profiles. Better posts every week.

How it works

Four steps. Sixty seconds for the first three. Two clicks for the fourth.

01

Connect your accounts

LinkedIn, X, Bluesky, Threads — OAuth in your browser, takes 60 seconds total.

02

Add SocialBoy to Claude

One click. No JSON, no terminal. Works on web, mobile, and desktop.

03

Drop in a newsletter

Paste it, link it, or forward it from your email.

04

Ship four platform-perfect posts

Each in your voice, with a brand-aware visual. Schedule or publish on the spot.

Brand-aware visuals

A visual that fits the post — and the platform.

Eye-catching imagery is the single biggest reach lever, especially on LinkedIn. Every post gets one, sized correctly per platform.

Editorial
AI · brand

Editorial

Bold typography
AI · brand

Bold typography

Clean product
AI · brand

Clean product

Tech announcement
AI · brand

Tech announcement

Minimalist
AI · brand

Minimalist

Poster
AI · brand

Poster

Built for newsletter writers

Write once. Show up everywhere.

Built for independent newsletter writers who want their best ideas in front of more people without becoming a full-time poster.

No more "I should cross-post this but who has the time"
No more LinkedIn posts that read like Substack hero text dumped into the box
No more wrestling with image dimensions for four different platforms
Newsletter writer setup

Pricing built for newsletter writers

Start free. Upgrade when one good post pays for itself.

Try the loop

Free

$0/mo
5 posts per month
1 voice profile
2 platforms
MCP access
No credit card required
MOST POPULAR
Most popular

Writer

$19/mo
50 posts per month
5 voice profiles
All 4 platforms (LinkedIn, X, Bluesky, Threads)
MCP access
Brand-aware AI visuals
For serious operators

Pro

$49/mo
Unlimited posts
Unlimited voice profiles
All platforms
Analytics & performance loop
Priority support

FAQ

Ready to add SocialBoy to Claude?

Newsletter in. Four platform-perfect posts out. Without leaving chat.