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.

Hosted connector (no install)

Prefer not to run anything locally? Connect to the hosted endpoint and authenticate with OAuth — no npx, no API key to manage:

https://mcp.postfa.st/mcp

Add it as a remote/streamable-HTTP MCP server in any client that supports OAuth (e.g. ChatGPT, Claude). You'll be prompted to sign in to PostFast and authorize access on first use.

Want to run the server yourself instead? Use the npx + API-key setup in Quick Start below.

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:

If you already added PostFast by hand, remove that entry before installing the plugin, or Claude Code shows two sets of PostFast tools.

/plugin marketplace add peturgeorgievv-factory/postfast-mcp
/plugin install postfast@postfast-mcp

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.json
# { "env": { "POSTFAST_API_KEY": "your-api-key-here" } }

Then restart Claude Code.

Via manual config:

Add to your project's .mcp.json:

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

Or add it for every project:

claude mcp add --scope user postfast --env POSTFAST_API_KEY=your-api-key-here -- npx -y postfast-mcp

Cursor

This repository is also a Cursor plugin: the PostFast MCP server together with its two skills, for scheduling posts and for the comments inbox.

To install it, open Customize in Cursor, search the marketplace for PostFast, select Install, and paste your API key when Cursor asks for it. Cursor starts the server with that key, so there is nothing else to configure. If PostFast doesn't show up in the marketplace yet, add the server by hand with the config below.

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"
• "Show me analytics for my Instagram posts this month"

Available Tools

| Tool | Description | |------|-------------| | list_accounts | List connected social media accounts (each with connectionStatus — CONNECTED/DISABLED — disabledReason, followerCount/followerCountUpdatedAt, and inboxCapable) | | list_posts | List posts with filters (specific IDs, accounts, platform, status, date range); each post carries its key settings in controls (Threads topic, Instagram/Facebook format, TikTok draft flag, YouTube privacy) | | create_posts | Create and schedule posts (batch, up to 15) | | delete_post | Delete a post from PostFast by ID (does not remove an already-published post from the platform) | | delete_posts | Delete up to 100 posts from PostFast in one call; returns deletedIds and notFoundIds (does not remove already-published posts from the platform) | | 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 | | list_gbp_locations | Get Google Business Profile locations for an account | | search_places | Find a place to tag posts (the id works for both facebookPlaceId and instagramLocationId) | | generate_connect_link | Generate a link for clients to connect accounts — optionally scoped to specific platforms, with a redirectUrl the user returns to (carrying status, platform, accountId and your own externalId, plus accountIds after a Facebook or LinkedIn page step) | | get_post_analytics | Fetch published posts with performance metrics — Instagram, Facebook, TikTok, Threads, YouTube, LinkedIn (company pages), Pinterest (Business accounts) | | get_follower_history | Daily follower-count history for an account (current count + delta over a date range) — Facebook Pages, Instagram, YouTube, Pinterest, Threads, Bluesky, Telegram, LinkedIn (company pages), TikTok | | list_tiktok_sounds | Trending pre-cleared Commercial Music Library tracks for a TikTok account (attach via controls.tiktokMusicSoundId) |

Social Inbox (comments)

Comments on your posts — TikTok, Instagram, Facebook Pages, and Threads — in one inbox (an account's inboxCapable flag says what is live today). Comments only (no direct messages), from connect onward (no history backfill). Reply capability is always server-computed per conversation (canReply, maxReplyLength, windowState, disabledReason) — render from those fields, never platform assumptions.

| Tool | Description | |------|-------------| | list_inbox_conversations | List comment conversations (filters: platforms, accounts, statuses, unread-only, assignee) | | get_inbox_conversation | Fetch one conversation with its reply-capability fields | | list_inbox_items | List a conversation's comments and replies (with state and, on Instagram, canPrivateReply) | | get_inbox_unread_count | Total unread comment count across the workspace | | reply_to_inbox_item | Reply publicly under a specific comment | | send_inbox_private_reply | Instagram only: one private reply per comment, within 7 days | | set_inbox_item_state | HIDE / UNHIDE / DELETE a comment on the platform (DELETE cannot be undone) | | mark_inbox_conversation_read | Zero a conversation's unread count | | set_inbox_conversation_status | Triage: OPEN / SNOOZED / CLOSED | | assign_inbox_conversation | Assign a conversation to a workspace member (or unassign) |

Supported Platforms

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

Platform-Specific Controls

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

| Platform | Controls | |----------|----------| | X (Twitter) | xRetweetUrl | | Instagram | instagramPublishType (TIMELINE/STORY/REEL), instagramTrialReelStrategy (MANUAL/SS_PERFORMANCE — trial reel shown to non-followers; Reels only, no collaborators), instagramPostToGrid, instagramCollaborators, instagramLocationId/instagramLocationName (geotag from search_places), instagramIsAiGenerated (adds the "AI info" label; set at creation only) | | Facebook | facebookContentType (POST/REEL/STORY), facebookAllowComments, facebookPrivacy, facebookCarouselMainLink, facebookCarouselShowEndCard, facebookReelsCollaborators, facebookTargetCountries (ISO alpha-2, max 25), facebookPlaceId/facebookPlaceName (geotag from search_places) | | TikTok | tiktokTitle (photo posts, max 90 chars), tiktokMusicSoundId/tiktokMusicSoundName (Commercial Music Library sound from list_tiktok_sounds; photo, carousel and video posts — on video it plays at 50% volume over the original audio at 50%; exclusive with tiktokAutoAddMusic), tiktokIsDraft, tiktokAllowComments, tiktokAllowDuet, tiktokAllowStitch, tiktokBrandOrganic, tiktokBrandContent, tiktokAutoAddMusic (photo/carousel posts), tiktokIsAigc, tiktokPrivacy (deprecated — account default applies) | | YouTube | youtubeTitle, youtubePrivacy (PUBLIC/PRIVATE/UNLISTED), youtubeTags, youtubeCategoryId, youtubeIsShort, youtubeMadeForKids, youtubeContainsSyntheticMedia (altered/synthetic content disclosure; set at creation only), youtubePlaylistId, youtubeThumbnailKey, youtubeLanguage (BCP-47 code such as en-GB or pt-BR; sets the video language and the title and description language), youtubeCaptionKey (an uploaded .srt/.vtt file, added as the video's caption track in youtubeLanguage, which it requires) | | Pinterest | pinterestBoardId (required), pinterestLink | | LinkedIn | linkedinAttachmentKey (an uploaded PDF, Word or PowerPoint file, max 60MB, shown in the post as pages to swipe through; not with images or video on the same post), linkedinAttachmentTitle (the document's title; "Document" if omitted) | | Threads | threadsTopicTag (the post's topic: one topic, not a list; 1-50 chars, no . or &; takes precedence over a #hashtag in the content, which then stays plain text. Like every control it applies to every post in the call, so use separate calls for different topics) | | Google Business Profile | gbpLocationId (required), gbpTopicType (STANDARD/EVENT/OFFER), gbpCallToActionType, gbpCallToActionUrl, gbpEventTitle, gbpEventStartDate, gbpEventEndDate, gbpOfferCouponCode, gbpOfferRedeemUrl, gbpOfferTerms |

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, plus SRT and VTT caption files for YouTube and PDF, DOC, DOCX, PPT and PPTX documents for LinkedIn. A caption file comes back with type CAPTION: pass its key as controls.youtubeCaptionKey, never in mediaItems. A document comes back with type DOCUMENT: pass its key as controls.linkedinAttachmentKey, never in mediaItems.

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/stdio/index.js

Tools are authored once in src/core (the catalog — schemas, descriptions, annotations, per-binding availability) and exposed to consumers as postfast-mcp/core; src/stdio binds the catalog to the public REST API. Releases: PRs add a .changeset/*.md; npm run version folds them into the bump + changelog, and pushing the vX.Y.Z tag publishes npm + MCP Registry + the MCPB release from CI (OIDC — no tokens anywhere).

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License

MIT