PostFast MCP Server

MCP server for the PostFast API — schedule and manage social media posts via AI tools like Claude, Cursor, VS Code, and more.

Quick Start

1. Get your API key

Log in to PostFast, go to API in the sidebar, and generate a key.

2. Install

Choose your preferred method:

Claude Desktop (recommended)

Download the extension from the Claude Desktop extension directory or install manually:

1. Add to claude_desktop_config.json:

{
  "mcpServers": {
    "postfast": {
      "command": "npx",
      "args": ["-y", "postfast-mcp"],
      "env": {
        "POSTFAST_API_KEY": "your-api-key-here"
      }
    }
  }
}

2. Restart Claude Desktop.

Claude Code

Via plugin (pending marketplace approval):

/plugin install postfast@claude-plugins-official

After installing, set your API key — pick one of these:

# Option A: Add to your shell profile (~/.zshrc or ~/.bashrc)
export POSTFAST_API_KEY="your-api-key-here"

# Option B: Add to ~/.claude/settings.local.json
# { "env": { "POSTFAST_API_KEY": "your-api-key-here" } }

Then restart Claude Code.

Via manual config:

Add to your project's .mcp.json or ~/.claude/.mcp.json (global):

{
  "mcpServers": {
    "postfast": {
      "type": "stdio",
      "command": "npx",
      "args": ["-y", "postfast-mcp"],
      "env": {
        "POSTFAST_API_KEY": "your-api-key-here"
      }
    }
  }
}

Cursor / VS Code / Windsurf / Other MCP clients

Add to your MCP config (.mcp.json, mcp.json, or the tool's settings UI):

{
  "mcpServers": {
    "postfast": {
      "type": "stdio",
      "command": "npx",
      "args": ["-y", "postfast-mcp"],
      "env": {
        "POSTFAST_API_KEY": "your-api-key-here"
      }
    }
  }
}

3. Use it

Ask your AI assistant things like:

• "List my connected social accounts"
• "Schedule a post to Instagram for tomorrow at 9am"
• "Show me all scheduled posts for this week"
• "Upload this image and create a LinkedIn post with it"
• "Create a Facebook reel with this video"

Available Tools

Tool	Description
list_accounts	List connected social media accounts
list_posts	List posts with filters (platform, status, date range)
create_posts	Create and schedule posts (batch, up to 15)
delete_post	Delete a post by ID
upload_media	Upload a local file and get a media key (handles the full flow)
get_upload_urls	Get signed URLs to upload media files
list_pinterest_boards	Get Pinterest boards for an account
list_youtube_playlists	Get YouTube playlists for an account
generate_connect_link	Generate a link for clients to connect accounts

Supported Platforms

Facebook, Instagram, X (Twitter), TikTok, LinkedIn, YouTube, BlueSky, Threads, Pinterest, Telegram

Platform-Specific Controls

When creating posts, you can pass platform-specific settings via the controls parameter:

Platform	Controls
X (Twitter)	xCommunityId, xQuoteTweetUrl, xRetweetUrl
Instagram	instagramPublishType (TIMELINE/STORY/REEL), instagramPostToGrid, instagramCollaborators
Facebook	facebookContentType (POST/REEL/STORY), facebookAllowComments, facebookPrivacy, facebookReelsCollaborators
TikTok	tiktokPrivacy (PUBLIC/MUTUAL_FRIENDS/ONLY_ME), tiktokIsDraft, tiktokAllowComments, tiktokAllowDuet, tiktokAllowStitch, tiktokBrandOrganic, tiktokBrandContent, tiktokAutoAddMusic
YouTube	youtubeTitle, youtubePrivacy (PUBLIC/PRIVATE/UNLISTED), youtubeTags, youtubeCategoryId, youtubeIsShort, youtubeMadeForKids, youtubePlaylistId
Pinterest	pinterestBoardId (required), pinterestLink
LinkedIn	linkedinAttachmentKey, linkedinAttachmentTitle

Media Upload

The upload_media tool handles the full flow in a single call:

1. Detects content type from file extension
2. Gets a signed upload URL from PostFast
3. Uploads the file
4. Returns a key and type ready to use in create_posts

Supported formats: JPEG, PNG, GIF, WebP, MP4, WebM, MOV

You can also use get_upload_urls directly if you need more control over the upload process.

Environment Variables

Variable	Required	Description
POSTFAST_API_KEY	Yes	Your workspace API key
POSTFAST_API_URL	No	API base URL (default: https://api.postfa.st)

Testing

Verify everything works with the MCP Inspector:

POSTFAST_API_KEY=your-key npx @modelcontextprotocol/inspector npx postfast-mcp

API Docs

Full REST API documentation: postfa.st/docs

Development

npm install
npm run build
node dist/index.js

License

MIT