The blind draft
Your AI writes from what it learned months ago, not from this week on X. The posts read fine and land flat, because nothing tells it what your niche is engaging with now.
Kalen · your X assistant inside Claude, ChatGPT and Cursor
Ask for a week of X posts. Approve. Done.
Kalen is an X assistant you connect to your AI. Every day he studies what is working in your niche on X. When you ask for posts, your AI writes them from his briefing, he scores every draft against what works, and once you approve, he schedules and publishes them on X.
01The problem
Your AI can write the posts. It can't see X.
Claude writes a decent post in seconds. It doesn't know what your niche is reacting to today, which of your own posts worked, or when your next slot is. So the posting still happens by hand, by feel, one tab at a time.
The morning scroll
Finding what is working means searching your keywords, checking trends and rereading the accounts you follow, every day, before you write a word.
The copy-paste schedule
The draft is in the chat, the scheduler in another tab. Every post is a copy, a paste, a time picked by feel, and a first reply with the link you forget to add.
02How it works
Your AI writes. Kalen does the rest.
Kalen connects through MCP, the standard Claude, ChatGPT and Cursor already support. He runs no writing model: your AI writes the posts, he brings the research, the scoring and the scheduling.
01
He reads your niche daily
The day's top posts for your keywords and X trends. Once a week, the most popular posts of your reference accounts and of your own account.
02
Your AI writes from his briefing
"Plan my X posts for next week with Kalen." Your AI gets the briefing and your open time slots, and writes the drafts in the chat.
03
Every draft gets a score
Kalen scores each draft 0 to 100 with Jev, TypeSafe's judgment model, against what works in your niche and your own best posts. Weak drafts go back for up to 3 rewrites.
04
You approve, he posts
Nothing is scheduled until you say yes in the chat. Then Kalen publishes on X through the official X API, with an optional first reply for your link.
By default he suggests about 40 posts a week: around 30 evergreen posts, plus a daily moment complement that reacts to the day's trends. The aim is a pass mark and a mix of formats, not a perfect score on every post. A weak post is shown to you as weak, never hidden.
03Works with
The AI you already pay for.
No new editor and no second subscription for the writing. Your AI, on your plan, writes the posts. Kalen brings the research, the scores and the posting.
Claude
Claude.ai, the desktop app, the mobile app and Claude Code. Add a custom connector and sign in.
ChatGPT
A custom connector in ChatGPT's settings. Sign in with your Kalen account.
Cursor and VS Code
One block in your MCP settings file, with a key from your account.
Anything with MCP
Other AIs that support remote MCP servers connect the same way.
04Pricing
Pay in credits. Keep what you don't use.
A post costs 1 credit, 2 with a first reply or a link. Unused credits last 3 months. There is no free plan that posts: X charges for every post published through its API, and Kalen pays that on each one. Every plan starts with 14 days free and 50 credits, and you can connect X and set your profile before you pick one.
$9/ month
A few posts a week, researched and scored. Yearly saves $18.
- 100 credits a month (1 a post, 2 with a link or a reply)
- Unused credits last 3 months
- Daily research of your niche
- Scoring against what works in your niche
- Schedule up to 3 weeks ahead
$29/ month
About 20 posts a day, every day. Yearly saves $58.
- 700 credits a month (1 a post, 2 with a link or a reply)
- Unused credits last 3 months
- Everything in Starter
$49/ month
Up to 50 posts a day for accounts that post all day. Yearly saves $98.
- 1,500 credits a month (1 a post, 2 with a link or a reply)
- Unused credits last 3 months
- Everything in Pro
05FAQ
What is an MCP server?
MCP (Model Context Protocol) is how AI assistants use outside tools. Once Kalen is connected, your assistant calls him by itself when you ask for X posts, the same way it searches the web or reads a file. You never leave the chat.
Which AIs does it work with?
Any AI that supports MCP connectors: Claude (web, desktop, mobile and Claude Code), ChatGPT, Cursor, VS Code and more. Your account has setup steps for each one.
Who writes the posts?
Your AI does, from your prompt and Kalen's briefing. Kalen runs no writing model. He researches your niche, hands your AI the briefing and your open time slots, scores the drafts and publishes the ones you approve.
What does Kalen research?
Every day: the top posts for your niche's keywords and the trends on X. Every week: the most popular posts of your reference accounts and of your own account. That is what your AI gets in the briefing, and what the drafts are scored against.
How does the scoring work?
Kalen scores each draft from 0 to 100 with Jev, TypeSafe's judgment model, against what works in your niche and your own best posts. A draft below the pass mark goes back to your AI for a rewrite, up to 3 rounds. The aim is a week that passes with a mix of formats, not a perfect score on every post. A weak post is shown to you as weak.
Will Kalen post without asking me?
No. Your AI shows you the posts and their times, and Kalen schedules them only after you approve in the chat. You can change or cancel any scheduled post until it goes out. He publishes through the official X API, with an optional first reply, for example with your link.
How many posts a week?
By default Kalen suggests about 40 a week: around 30 evergreen posts plus a daily moment complement that reacts to the day's trends. As many as your credits cover: a post costs 1 credit, 2 with a first reply or a link. Plans give credits every month (Starter 100, Pro 700, and Ultra 1,500), and unused credits last 3 months.
Where does my link go?
In the first reply, right under the post, on its own or after the reply's text. The post itself can't hold a link.
Is there a free trial?
Yes. Every plan starts with 14 days free and 50 credits on your first subscription. Cancel any time before the trial ends and nothing is charged; after that the plan renews at its price.
Why is there no free plan?
X charges for every post published through its API, and Kalen pays that on each post. The 14-day free trial is the way to try it, and you can create an account, connect X and set up your profile before you start it.
What can't Kalen post?
Posts that @mention other accounts (X blocks them through the API), more than one cashtag in a post, posts more than 3 weeks ahead, and moment posts more than 48 hours out. Media: JPG, PNG or WebP up to 5 MB, GIF up to 15 MB, MP4 up to 50 MB.
What if it's not for me?
Cancel during the 14-day free trial and nothing is charged. After that, cancel any time from your account: the plan stays active until the end of the period you paid for, and nothing is charged after that.