Platform
X
Posts, grids, and short video on X
Publish native X posts from CatCaster with character limits enforced before anything hits your queue.
What you can do in CatCaster
Text posts
280-character posts with optional link and hashtag suggestions from AI.
Image and grid media
Single image or up to four images in one post.
Video
Video posts up to 140 seconds when format validation passes.
DMs and mentions inbox
Message sync and AI draft replies where your X connection includes messaging scopes.
Limits and honest constraints
- 280-character hard limit on post text—master copy must be summarized for X.
- Grid carousels accept up to four images, not ten like Instagram.
- X API access tiers from the platform may cap posting volume independent of CatCaster.
- Premium-only X features outside the posting API are not available through CatCaster.
What AI can help with
- Compress a LinkedIn essay into a single strong X post or a numbered thread outline (you publish each post separately unless you batch manually).
- Suggest hooks and CTAs within 280 characters.
- Draft DM replies; sending requires explicit approval per your inbox settings.
Claude, Cursor, and other agents
CatCaster exposes a remote MCP server at https://www.catcaster.com/api/mcp. Connect with OAuth (recommended) or a workspace API key. Agents discover workspaces and channels, draft posts, validate placements, schedule or publish with idempotency keys, and read analytics.
Relevant MCP tools
list_workspaces · list_channels · get_brand_context · create_post · update_post · validate_post · schedule_post · publish_post · get_analytics · list_published_content · list_inbox_conversations · get_inbox_conversation · draft_inbox_reply · send_inbox_reply
Example prompt
Via CatCaster MCP, create an X text_post under 280 characters from this launch note. validate_post, then if valid ask me for schedule_post time. For DMs, draft only unless I say to send_inbox_reply.
OAuth setup for MCP clients is documented in docs/mcp-oauth.md in the CatCaster repository (Supabase OAuth 2.1, dynamic client registration, and consent). Browse AI agent guides →
Frequently asked questions
- Does CatCaster post threads automatically?
- Each X post is one API publish. Agents can create multiple drafts, but CatCaster does not auto-chain thread replies without separate posts.
- Can I schedule video on X?
- Yes, when video meets duration and format rules in Compose validation.
- Is the channel called twitter or x in the API?
- Internally the platform id remains twitter; public URLs use /platforms/x.
- Can Cursor publish to X for me?
- Yes with MCP OAuth. publish_post requires validation success and your confirmation in well-behaved agent prompts.