X · from Claude
Post to X from Claude.
Claude’s drafts are thoughtful and long. X allows 280 characters. The check in between turns that mismatch into a thread or a tighter sentence.
Claude tends to write in full paragraphs, and X allows 280 characters per post. Connected to 1Social, Claude checks a draft against X before publishing, sees exactly which part runs over and by how much, and can then tighten it or send it as a chain of up to 25 replies — each part measured on its own before anything goes out.
The connection is a sign-in to X in a browser; there is no developer account to open and no API bill of your own, which is the main difference from running X’s own MCP server. Claude gets a small set of tools — check, publish, schedule, list what went out — and the reply after publishing includes the link to the post.
Asking Claude for an X post
The X ceilings in this exchange come from the same table the publisher enforces — the conversation is drawn, the numbers are not.
Set me up — what do you need?
Just the accounts. Connect them in the browser once and I can publish from here after that.
Done, connected
I will tell you before publishing if a network cannot take what you wrote.
Good. Drafting the launch note now
Send it over and I will check it before anything goes out.
Post the main point to X — one post if it fits, otherwise a short thread
from a long discussion · no media
The full point is over the limit, so:
Sent as a three-part thread. Each part was counted before any of them went.
What X allows
Read from the same table the publisher enforces, so this cannot drift from what actually happens when you press send.
- Caption limit
- 280 characters
- Post with no image or video
- Fine
- Reply chains
- Yes — up to 25 parts
- Images or video per post
- 4
- Image formats
- Anything we accept for upload
Publishing to X from Claude
The overshoot, measured
The check reports the part that does not fit and by how many characters, which is all Claude needs to rewrite one sentence instead of the post.
A chain when the idea needs it
Ask for a thread and the piece goes out as connected replies, in order, each one inside the limit before any of them is sent.
Rules that persist between chats
Put “X posts: no hashtags, one idea, under the limit” in a Claude project, and every draft for X starts closer to fitting.
The cost, shown up front
Posts to X use more of your monthly allowance than other networks, more again with a link, and the check says how much before you publish.
How it works
Connect once
~2 minLink the accounts you use in a browser. OAuth, no passwords typed into a chat, no API keys to paste anywhere.
ChatGPT
Claude
Cursor
Ask, in your own words
one sentenceTell Claude to publish to X, now or on a day you name. No dashboard, no tab switch.
Read the receipt
per networkOne line per network — what landed, what failed and why, and what genuinely could not be determined.
Projects remember what the chat forgets
Every new Claude conversation starts without the rules you settled on in the last one — how you sound on X, what you never do there. A Claude project keeps instructions that apply to every chat inside it, and that is the right place for them: “one idea per post, no hashtags, threads only when asked”. The publishing tool still checks every draft against X’s limit, but a draft that starts from your rules should need fewer rounds of trimming before it fits.
A rule of X from Claude, not ours and not the network’s. From documentation, checked 2026-10-27.
When this is the wrong tool
This posts to X. It does not read your timeline, search, follow anyone or reply to mentions, and it is not a way to grow an account automatically. If what you post is mostly links to X, check the pricing first, because link posts on X cost the most of anything here.
Questions people actually ask
Can Claude post to X (Twitter)?
Yes, with 1Social connected. You sign in to X once in a browser, and then Claude can check, publish and schedule posts and threads there. The reply after publishing has the link.
Can Claude write and post an X thread in one go?
Yes. Ask for a thread and it is sent as a chain of up to 25 replies; each part is checked against the limit on its own before the first one leaves.
How do I stop Claude writing X posts that are too long?
Keep your X rules in a Claude project’s instructions, and the drafts start from them. Anything still too long is caught by the check before publishing, with the exact overshoot.
Something else? Ask us — a person answers.
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