X (Twitter) API
Publish to X
with cost you can see.
X now charges per post through its API. MonoChalk adds X to the same unified post request you use everywhere else — and instead of burying that cost in a flat plan, it meters X usage transparently so you always know what a post costs.
Every other platform is included in your monthly post quota. X is the exception, because X itself charges per post — so MonoChalk bills it separately at a flat $0.20 per post on paid plans, and shows it on your usage. X isn't available on the free plan.
Same request. X is just one more target.
You don't write X-specific code. Add the connected X account to account_ids, optionally set scheduled_at, and MonoChalk handles delivery, retries, and metering.
{
"account_ids": ["x_8842"],
"text": "We just shipped scheduling. 🚀",
"scheduled_at": "2026-07-15T09:00:00Z"
}queued · x usage metered
No surprises on the invoice.
- Counted separately
- X posts don't draw down your flat monthly quota — they're metered on their own line.
- Flat per-post rate
- A flat $0.20 per X post on paid plans — one number, whether or not the post has a link. X publishing isn't available on the free plan.
- Visible on usage
- Every X publish records a usage entry, so cost is attributable per post rather than estimated.
- Same reliability
- Scheduling, retries on safe failures, per-target status, and signed webhooks work exactly as they do for other platforms.
X publishing FAQ.
Can I schedule posts to X with MonoChalk?
Yes. Send a post with a scheduled_at timestamp and MonoChalk queues it for delivery to X, then reports the result through per-target status and signed webhooks.
Why does MonoChalk meter X separately?
X charges per post through its API, so MonoChalk bills X at a flat $0.20 per post on paid plans — separate from your monthly post quota — and shows every X publish on your usage, rather than hiding that cost in a flat rate. X publishing isn't available on the free plan.
Is this an X scheduling tool or an API?
It's an API you build into your own product. Your app or your AI agent supplies the content, and MonoChalk handles connection, publishing, scheduling, retries, and status. See the unified API →