Engagement
Retweet and bookmark posts, follow or unfollow accounts, and search recent posts using keywords.
Shipping notes, part one: the new dashboard is live in every region as of this morning.
Part two: replies come back on the same webhook, so nothing needs polling any more.
Stop wrestling with X's API pricing and complexity. Zernio gives you a single, simple endpoint to schedule tweets while we handle OAuth, rate limits, and all the platform changes.
Save 4-6 weeks of development time
Zernio API
Simple API key - no $100/month fee
Automatic retries & queue management
Upload directly - we handle media processing
Zero maintenance forever
One API for 17 platforms
X API Direct
$100+/month API access, complex OAuth 2.0 PKCE
Strict rate limits with per-user quotas
Media upload requires multiple API calls
Frequent API changes and deprecations
Build separate integrations per platform

Profile
defaultX
Link your X account through our dashboard. One-click OAuth - we handle all the X permissions.

POST /v1/posts
const { data } = await zernio.posts.createPost({ body: { content: 'Shipping today 🚀', mediaItems: [{ url: 'https://cdn.acme.com/launch.jpg' }], platforms: [ { platform: 'twitter', accountId: 'acc_8f2a' }, ], scheduledFor: '2027-01-15T14:30:00', timezone: 'Europe/Madrid', }, });
Use our simple REST API to schedule posts, threads, images, or videos. Same pattern works for all 17 platforms.

post.failed
Webhook sent to your app
Mon, 18 Jan
09:00, Europe/Madrid
Shipping today 🚀
Fri, 15 Jan at 14:30
Zernio publishes at your scheduled time, retries on failures, and notifies you via webhooks. You never touch X's API directly.
Skip X's expensive API subscription
Retweet and bookmark posts, follow or unfollow accounts, and search recent posts using keywords.
Read and send X DMs through the same Inbox API that covers every other channel.
Schedule a post on X with images or video, publish threads and articles, or edit published posts.
Zernio's X Ads API lets you launch campaigns, promote posts you already published, and build reports.
Pricing launch
$25/day
Summer Sale
$40/day
Retargeting
$30/day
Pricing launch
$25/day
Spring Promo
$35/day
Launch Push
$18/day
Summer Sale
$40/day
Retargeting
$30/day
Holiday Boost
$52/day
Add a poll with 2 to 4 options. Choose who can reply: followers, mentioned users, subscribers or verified.
Read, answer, and moderate the replies to your X posts.
Pull impressions, engagement, and click metrics for any post you've published.
Write it yourself with the SDKs, hand it to an agent over MCP, or run it from a shell.
Uses the real X (Twitter) OAuth. You can disconnect right after
No credit card, no sales call. Same reliability, 10x less code.