Zernio MCP for X

Server URL

Add it as a custom connector or remote MCP server, then sign in with your Zernio account.

or in Claude Code

X (Twitter) MCP server for posting and threads

Let your agent post tweets, threads and polls and answer replies through the official X API.

Connect X Read the MCP docs

Official X API
Threads, polls, replies
X rates, zero markup

Join 70,000+ of the world's most ambitious developers and builders

X MCP servers compared

X's own MCP server reads. Zernio's also posts, schedules and replies.

Zernio X MCP

Post tweets, threads, polls and articles
Schedule and queue posts
Reply to and hide replies in your conversations
Every X account you run on one connection

X's hosted MCP server

Search, timelines and user lookup
No write access, so no posting
Nothing to schedule or queue

Tools

X tools your agent can call

Engagement, DMs and pricing load through search_tools when the agent needs them.

Posting

Tweets with media, threads, polls, quote posts and long-form articles. Choose who can reply.

posts_create
posts_create_post
posts_cross_post

Replies

Reply inside conversations you started or were mentioned in, and hide or delete replies.

posts_create_post
comments_hide_inbox_comment
comments_delete_inbox_comment

Search and read

Search tweets from the last 7 days with X's operators, and read a single tweet.

twitter_engagement_search_tweets
twitter_engagement_get_tweet

Engagement

Repost, bookmark, follow and unfollow as the connected account.

twitter_engagement_retweet_post
twitter_engagement_bookmark_post
twitter_engagement_follow_user

DMs

Read and send X direct messages through the Zernio inbox.

messages_list_inbox_conversations
messages_send_inbox_message

Analytics and cost

Impressions and engagement per post, and X's price per call before a batch runs.

analytics_get_analytics
usage_get_x_api_pricing

Setup

One URL in your client

Connect your X account in Zernio
Add the server URL to your client
Sign in, or send an API key from an unattended agent

Connect X Get an API key

Setup for every client

Claude web, desktop or mobile: Settings → Connectors → Add custom connector Name Zernio URL https://mcp.zernio.com/mcp Sign in with Zernio when asked. No API key needed.

All clients

Example

Ask in plain words. The agent picks the tools.

Every line after the request is a Zernio tool call on X.

Ship a launch thread

The agent writes the thread from your notes and schedules it with your screenshot.

Claude Code

› claude

Claude Code v2.1.19

Opus 4.5 · Claude Max

~/software

›

✓ media_check_upload_status · screenshot.png

✓ validate_post_length · 5 of 5 fit

✓ posts_create_post · thread of 5 · Tue 15:00

✓ scheduled · 5 posts at X's $0.015 each

Limits

What the X tools won't do

Set by the platform's own API rules, or left out of Zernio on purpose.

Replies in your conversations

X rejects API replies and quotes on posts outside threads you started or were mentioned in.

Search covers 7 days

Recent search only, up to 300 requests per 15 minutes per connected account.

Legacy DMs only

Encrypted X Chat messages aren't available through X's API, so some conversations show only one side.

Every call costs

X charges per API call: a post is $0.015, a post with a link $0.20. Zernio passes the rate through unchanged.

A card before the first account

Because every call has a cost, connecting an X account needs a payment method on file, even on the free tier.

Pricing

The MCP server is free. You pay for API usage.

See pricing

Tool calls bill like the API requests behind them.

X API calls bill at X's own per-call rates with zero markup. Reads cost $0.005, posts and DM sends $0.015.

The agent can read the price table with usage_get_x_api_pricing before it runs a batch.

Frequently Asked Questions

Give your agent your X accounts

Connect an account, add one URL to your client, and ask for the thread.