Solutions
X API for Developers
Publish posts with images, GIFs and video to X from one REST API or MCP server. Ampost handles OAuth, the chunked media upload and X's pay-per-use billing behind a fixed monthly allowance. Comparing costs? Read our guide to X API pricing.
Text, Images and Video
Publish text posts, up to 4 images, a GIF or one video. Ampost runs X's chunked media upload and waits for video processing before posting.
No X Developer Account
X API access is pay-per-use per request. Ampost holds the developer app and the prepaid credits, so you connect accounts instead of managing X billing.
Predictable Monthly Allowance
The Max plan includes up to 660 X posts a month without links, or 50 with links, because X charges far more for posts with a URL.
Managed OAuth 2.0 with PKCE
Ampost runs the X OAuth 2.0 flow, stores tokens encrypted and refreshes the two-hour access tokens before each publish.
Character Counting like X
Text is checked the way X counts it: every link is 23 characters. A `linkUrl` is appended to the post text for you.
Same Model as Every Platform
Send one post to X, LinkedIn, Threads, Bluesky and the rest with the same request, and read per-platform results from one response.
Why this page exists
An X publishing API without X billing
Since 2026, X charges for every API request, with posts that contain a link costing more than ten times a plain post. Building on X directly means a developer account, prepaid credits and your own spending controls.
Ampost puts that behind the Max and Scale plans: a monthly allowance of X posts, checked before any billed call, plus the same post model you use for every other network.
Use cases
AI agents announcing releases
Let an agent draft the release post, attach a screenshot and publish to X through MCP or REST, within a known monthly X budget.
SaaS products posting for their users
Offer X posting inside your product without applying for X API access, paying per request or handling OAuth yourself.
Scheduling posts across networks
Schedule the same announcement for X, LinkedIn and Bluesky; Ampost stores the media and publishes each at the scheduled time.
Publish to X in one API call
Connect an X account once, then publish from your backend, workflow tool or agent with the same request you send to other platforms.
curl -X POST https://api.ampost.io/api/posts \
-H "Authorization: Bearer amp_live_YOUR_KEY" \
-H "Content-Type: application/json" \
-d '{
"platforms": ["twitter"],
"text": "Ampost 2.4 is out: faster scheduling and new analytics.",
"media": [
{ "url": "https://cdn.example.com/release.png", "type": "image", "altText": "Release notes" }
],
"publishNow": true
}'X-specific caveats
What developers should know before integrating
X is available on the Max and Scale plans only, because every X API call is billed. Free and Pro accounts cannot connect X.
Each X post uses units of the monthly allowance: 1 for a post, 13 for a post that contains a link (bare domains count), plus 1 per image or video. 660 plain posts or 50 posts with links fit in a month.
There is also an hourly X post limit. A post over it fails with RATE_LIMITED and can be retried later.
Posts are limited to 280 characters, as X counts them. Polls, quote posts, replies and threads are not supported yet.
Build path
Move from X proof of concept to production
Start with the API docs, connect an X account on a plan with X and send a first post with an image. Read the X result from platformPosts[].
Before you go live, decide which posts carry links: they use most of the allowance. When you post often, put the link on the other platforms and keep the X post plain.
FAQ
Common questions about X API integration
Do I need my own X developer account to post through Ampost?
No. Ampost owns the X developer app and pays X's per-request fees. You connect X accounts through Ampost's OAuth flow and publish with your Ampost API key.
How many X posts can I publish per month?
On the Max plan, up to 660 posts without links or 50 posts with links per month, or any mix of the two; Scale gets 1320 or 101. A post with a link uses 13 units, a plain post 1, and each image or video 1 more.
Can I schedule posts to X?
Yes. Send a future `scheduledFor` value; Ampost copies the media to its storage and publishes at that time. The X allowance is used when the post is published.
Related resources
Where X publishing fits in Ampost
These pages expand the X overview with the API reference, pricing and the rest of the multi-platform product.
Ready to publish to X via API?
Start building with Ampost today. Use one integration surface for X and the rest of your social publishing workflow.