Can an AI agent post and reply on X?

By Andrey Marey, Founder of AgentWeb · As of Oct 22, 2026

Short answer. Yes, through AgentWeb. As of Oct 22, 2026, the X map (version 0.1.0) gives your agent 13 actions on the user's own X account: 7 that act (post, reply, delete, like, unlike, repost, undo repost) and 6 that read first (the home timeline, a post, its replies, an account, its posts). One honest caveat from the map itself: X often refuses create_post from an API client with an authorization error (code 226), even while replies from the same session go through. When that happens, your agent gets the error back instead of a silent failure.

Map: X (x.com) · version 0.1.0 · 13 actions · Uses the person's own signed-in account

What your agent can do on X

Action	What it does
`create_post`	Publishes a new standalone post. X often refuses this from API clients (error code 226). Replies usually still work.
`reply_post`	Replies to a post. Public and immediate.
`delete_post`	Permanently deletes one of the account's own posts or replies. Irreversible.
`add_like`	Likes a post. Public, and it notifies the author.
`remove_like`	Removes a like.
`create_repost`	Reposts someone's post to the account's followers.
`remove_repost`	Undoes a repost.

What your agent can read first

Action	What it returns
`list_home_timeline`	Read the signed-in account's home feed, newest first, the chronological 'Following' timeline, not the ranked 'For you' one.
`get_post`	Read one post by id, its full text, author, timestamp and engagement counts.
`list_post_replies`	Read the replies under one post, the conversation thread, ranked by X's relevance.
`get_user`	Look up one account by its @handle.
`list_my_posts`	Read the signed-in account's own posts, newest first, with their current like/reply/repost/view counts.
`list_user_posts`	Read another account's posts, newest first, with engagement counts, use it to watch a competitor, a customer or a journalist.

The person signs in once on X through AgentWeb's hosted login, started with agentweb_start_connection and confirmed with agentweb_poll_connection. Your agent never sees the password. Actions then run on that person's own account, and they can disconnect at any time.

Try it

curl -s https://mcp.agentweb.us/api/execute \
  -H "Authorization: Bearer $AGENTWEB_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: x-user-1" \
  -d '{"domain":"x.com","action":"get_user","params":{"handle":"<handle>"}}'

Parameter names shown are illustrative. Your agent gets the exact schema for every action from AgentWeb's list_actions tool.

What it does not cover yet

Posting images or video is not mapped.
Direct messages on X are not mapped.

Frequently asked questions

Why might `create_post` fail?

X often refuses new standalone posts from API clients with an authorization error (code 226, or 344 phrased as a daily limit), even while replies from the same session succeed. The map documents this, and your agent gets the error back so it can tell the user and offer a reply instead.

Should my agent read the thread before replying?

Yes. list_post_replies returns the conversation under a post, so the agent doesn't repeat what others already said.

What does it cost?

Each completed action costs $0.05, paid from prepaid blocks of $25, $50 or $100 that never expire. Failed actions are refunded.

Which AI tools can use it?

Any agent that speaks MCP or HTTP. Add https://mcp.agentweb.us/mcp as a remote MCP server in Claude, ChatGPT, Cursor, Codex or Grok, or call the REST endpoint directly.

Action list from AgentWeb's public sites API, snapshot Oct 22, 2026, 16:59 London time. Live coverage: mcp.agentweb.us/api/sites.

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