X MCP servers get read-only mode to stop agents from posting or DMing
Kyrannio · x · 2026-11-11
X has added a read-only mode to its MCP servers for both the X API and Ads API: append ?readonly=true to your MCP URL and your agent only gets read tools — posting, DMs, bookmarks, blocks and all other writes are removed, and the server refuses write requests even if your token carries write scopes. As the official account put it: "Your agent can no longer send an X Chat to your ex by mistake."
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