The Twitter (X) scheduler for agencies.

Why agencies still schedule X posts

X is where news breaks, founders talk shop and customers complain in public. For many B2B, media and tech clients it is still the fastest way to be seen by the people who matter to them. It also rewards a steady rhythm, which is hard to keep when you run ten accounts by hand.

X has a built-in scheduler: on the desktop web you pick a date and time in the composer, up to 18 months ahead, and mobile scheduling needs X Pro. It works one account at a time, with no plan, no client approval and no report. A Twitter scheduler built for agencies adds those parts: each client's week is planned, written and queued, and the client signs off before anything goes out.

How the writer handles the 280-character limit

Standard X posts are capped at 280 characters. X counts every link as 23 characters, because it wraps links in its t.co shortener, and attached images or video count as zero. X Premium accounts can post up to 25,000 characters, but X's own help center says long posts cannot be scheduled.

SocialScheduler writes every X post to fit 280 characters and counts a link as 23, the way X does. The count runs again before the post is scheduled, so nothing gets cut off. Each post carries one idea and a clear first line. Hashtags stay out of the body.

• Posts are written to 280 characters, not Premium long posts
• Threads are not supported today: every X post is a single post
• An image or short video is attached only when it adds something

The agency workflow on X

Each client starts with a brief: what they sell, who they talk to, words they use and words they never use. On Sunday the AI plans the client's week across every network they are on and writes the X posts from that plan, sized for X rather than copied from LinkedIn.

You choose who approves, per client. Your team can approve in the app, the client can approve, comment or ask for a change from an email link with no login, or you can turn on autopilot for clients you trust. Every Monday the client gets a report under your agency's name with what went out and how it did.

Replies and DMs in one inbox

Replies and DMs from X come into the same inbox as Instagram, Facebook, Threads, YouTube and Bluesky. A reply can be drafted in the client's voice for your team to send.

Keyword rules handle the repeat work. When a reply contains a word you set, SocialScheduler can answer it, send a lead magnet by DM, like it or repost it. Post metrics come back too, and the next week's plan uses them: formats and hours that worked get more room, and the ones that did not get less.

The best time to post on X

Studies disagree on the exact hour. Sprout Social's 2026 data (nearly 2 billion engagements, November 2025 to February 2026) puts the best window at 12 to 6 p.m. on Tuesday, Wednesday and Thursday, with Saturday the weakest day. Buffer's 2026 analysis of 8.7 million posts found Tuesday at 9 a.m. to be the single best slot. Both use the audience's local time.

Averages are a starting point. SocialScheduler starts each client on the common windows, then shifts each post toward the hours when that client's own posts get the most replies, likes and reposts.

Why some schedulers dropped X, and what the free plan covers

X began charging for most API access in 2023 and now bills developers per call: $0.015 for each post created and $0.20 for a post with a link, according to X's developer docs. Some tools passed that on or left: Later ended X support on August 28, 2025, saying it would otherwise have had to raise prices.

SocialScheduler pays the X API cost on its side. Publishing never costs you credits. The free plan covers one client and three accounts, with 20 AI credits a month; a planned week uses 10. Business is $49 a month for five clients and Agency is $149 a month for fifteen, with 20% off yearly.