PostProxy MCP Server

MCP (Model Context Protocol) server for integrating PostProxy API with Claude Code. This server provides tools for publishing posts, checking statuses, and managing social media profiles through Claude Code.

Installation

Global Installation

npm install -g postproxy-mcp

Local Installation

npm install postproxy-mcp

Claude Code stores MCP server configuration under ~/.claude/plugins/. After installing postproxy-mcp, Claude will automatically detect the server on restart.

Configuration

Register MCP Server

After installing postproxy-mcp, register it with Claude Code using the claude mcp add command:

claude mcp add --transport stdio postproxy-mcp --env POSTPROXY_API_KEY=your-api-key --env POSTPROXY_BASE_URL=https://api.postproxy.dev/api -- postproxy-mcp

Replace your-api-key with your actual PostProxy API key.

The configuration will be automatically saved to ~/.claude/plugins/. After running this command:

1. Restart your Claude Code session
2. Test the connection by asking Claude: "Check my PostProxy authentication status"
3. If tools are available, Claude will be able to use them automatically

Alternative: Interactive Setup

For non-technical users, you can use the interactive setup command:

postproxy-mcp setup

or

postproxy-mcp-setup

This will guide you through the setup process step by step and register the server using claude mcp add automatically.

Available Tools

Authentication Tools

auth.status

Check authentication status, API configuration, and workspace information.

Parameters: None

Returns:

{
  "authenticated": true,
  "base_url": "https://api.postproxy.dev/api",
  "profile_groups_count": 2
}

Profile Management

profiles.list

List all available social media profiles for posting.

Parameters: None

Returns:

{
  "profiles": [
    {
      "id": "profile-123",
      "name": "My Twitter Account",
      "platform": "twitter",
      "profile_group_id": "group-abc"
    }
  ]
}

Post Management

post.publish

Publish a post to specified social media profiles.

Parameters:

• content (string, required): Post content text

• profiles (string[], required): Array of profile IDs (hashids) or platform names (e.g., "linkedin", "instagram", "twitter"). When using platform names, posts to the first connected profile for that platform.

• schedule (string, optional): ISO 8601 scheduled time

• media (string[], optional): Array of media URLs or local file paths

• idempotency_key (string, optional): Idempotency key for deduplication

• require_confirmation (boolean, optional): If true, return summary without publishing

• draft (boolean, optional): If true, creates a draft post that won't publish automatically

• platforms (object, optional): Platform-specific parameters. Key is platform name (e.g., "instagram", "youtube", "tiktok"), value is object with platform-specific options. See Platform Parameters Reference for full documentation.

  Example:

  {
    "instagram": {
      "format": "reel",
      "collaborators": ["username1", "username2"],
      "first_comment": "Link in bio!"
    },
    "youtube": {
      "title": "My Video Title",
      "privacy_status": "public"
    },
    "tiktok": {
      "privacy_status": "PUBLIC_TO_EVERYONE",
      "auto_add_music": true
    }
  }

Returns:

{
  "job_id": "job-123",
  "accepted_at": "2024-01-01T12:00:00Z",
  "status": "pending",
  "draft": true
}

Note on draft posts: If you request a draft post (draft: true) but the API returns draft: false, a warning field will be included in the response indicating that the API may have ignored the draft parameter. This can happen if the API does not support drafts with certain parameters (e.g., media attachments) or under specific conditions. Check the warning field in the response for details.

post.status

Get status of a published post by job ID.

Parameters:

• job_id (string, required): Job ID from post.publish response

Returns:

{
  "job_id": "job-123",
  "overall_status": "complete",
  "draft": false,
  "status": "processed",
  "platforms": [
    {
      "platform": "twitter",
      "status": "published",
      "url": "https://twitter.com/status/123",
      "post_id": "123",
      "error": null,
      "attempted_at": "2024-01-01T12:00:00Z"
    }
  ]
}

Status values:

• overall_status: "draft", "pending", "processing", "complete", "failed"
• Platform status: "pending", "processing", "published", "failed", "deleted"
• Platform error: Error message if publishing failed (null if successful)

post.publish_draft

Publish a draft post. Only posts with draft: true status can be published using this endpoint.

Parameters:

• job_id (string, required): Job ID of the draft post to publish

Returns:

{
  "job_id": "job-123",
  "status": "processed",
  "draft": false,
  "scheduled_at": null,
  "created_at": "2024-01-01T12:00:00Z",
  "message": "Draft post published successfully"
}

post.delete

Delete a post by job ID.

Parameters:

• job_id (string, required): Job ID to delete

Returns:

{
  "job_id": "job-123",
  "deleted": true
}

History

history.list

List recent post jobs.

Parameters:

• limit (number, optional): Maximum number of jobs to return (default: 10)

Returns:

{
  "jobs": [
    {
      "job_id": "job-123",
      "content_preview": "Post content preview...",
      "created_at": "2024-01-01T12:00:00Z",
      "overall_status": "complete",
      "draft": false,
      "platforms_count": 2
    }
  ]
}

Example Prompts

Here are some example prompts you can use with Claude Code:

Check Authentication

Check my PostProxy authentication status

List Profiles

Show me all my available social media profiles

Publish a Post

Using profile IDs:

Publish this post: "Check out our new product!" to profiles ["profile-123"]

Using platform names:

Publish "Exciting news!" to linkedin and twitter

Publish with Platform Parameters

You can use platform-specific parameters to customize posts for each platform. The platforms parameter accepts an object where keys are platform names and values contain platform-specific options.

Instagram Examples

Regular Post with Collaborators:

Publish to Instagram: "Amazing content!" to my Instagram account with collaborators username1 and username2

Or with explicit parameters:

{
  "content": "Amazing content!",
  "profiles": ["instagram"],
  "media": ["https://example.com/image.jpg"],
  "platforms": {
    "instagram": {
      "format": "post",
      "collaborators": ["username1", "username2"],
      "first_comment": "What do you think? 🔥"
    }
  }
}

Instagram Reel:

{
  "content": "Check out this reel! #viral",
  "profiles": ["instagram"],
  "media": ["https://example.com/video.mp4"],
  "platforms": {
    "instagram": {
      "format": "reel",
      "collaborators": ["collaborator_username"],
      "cover_url": "https://example.com/thumbnail.jpg",
      "audio_name": "Trending Audio",
      "first_comment": "Link in bio!"
    }
  }
}

Instagram Story:

{
  "profiles": ["instagram"],
  "media": ["https://example.com/story-image.jpg"],
  "platforms": {
    "instagram": {
      "format": "story"
    }
  }
}

YouTube Examples

YouTube Video with Title and Privacy:

Upload this video to YouTube with title "My Tutorial" and make it public

Or with explicit parameters:

{
  "content": "This is the video description with links and details",
  "profiles": ["youtube"],
  "media": ["https://example.com/video.mp4"],
  "platforms": {
    "youtube": {
      "title": "My Tutorial: How to Build an API",
      "privacy_status": "public",
      "cover_url": "https://example.com/custom-thumbnail.jpg"
    }
  }
}

Unlisted YouTube Video:

{
  "content": "Video description",
  "profiles": ["youtube"],
  "media": ["https://example.com/video.mp4"],
  "platforms": {
    "youtube": {
      "title": "Private Tutorial",
      "privacy_status": "unlisted"
    }
  }
}

TikTok Examples

Public TikTok with Auto Music:

{
  "content": "Check this out! #fyp",
  "profiles": ["tiktok"],
  "media": ["https://example.com/video.mp4"],
  "platforms": {
    "tiktok": {
      "privacy_status": "PUBLIC_TO_EVERYONE",
      "auto_add_music": true,
      "disable_comment": false,
      "disable_duet": false,
      "disable_stitch": false
    }
  }
}

TikTok for Followers Only with AI Label:

{
  "content": "Special content for followers",
  "profiles": ["tiktok"],
  "media": ["https://example.com/video.mp4"],
  "platforms": {
    "tiktok": {
      "privacy_status": "FOLLOWER_OF_CREATOR",
      "made_with_ai": true,
      "brand_content_toggle": false
    }
  }
}

Facebook Examples

Facebook Post with First Comment:

{
  "content": "Check out our new product!",
  "profiles": ["facebook"],
  "media": ["https://example.com/product.jpg"],
  "platforms": {
    "facebook": {
      "format": "post",
      "first_comment": "Link to purchase: https://example.com/shop"
    }
  }
}

Facebook Story:

{
  "profiles": ["facebook"],
  "media": ["https://example.com/story-video.mp4"],
  "platforms": {
    "facebook": {
      "format": "story"
    }
  }
}

Facebook Page Post:

{
  "content": "Company announcement",
  "profiles": ["facebook"],
  "platforms": {
    "facebook": {
      "page_id": "123456789",
      "first_comment": "Visit our website for more details"
    }
  }
}

LinkedIn Examples

Personal LinkedIn Post:

{
  "content": "Excited to share my latest article on AI",
  "profiles": ["linkedin"],
  "media": ["https://example.com/article-cover.jpg"]
}

Company LinkedIn Post:

{
  "content": "We're hiring! Join our team",
  "profiles": ["linkedin"],
  "media": ["https://example.com/careers.jpg"],
  "platforms": {
    "linkedin": {
      "organization_id": "company-id-12345"
    }
  }
}

Cross-Platform Examples

Same Content, Different Platforms:

{
  "content": "New product launch! 🚀",
  "profiles": ["instagram", "twitter", "linkedin"],
  "media": ["https://example.com/product.jpg"]
}

Video Across Platforms with Specific Parameters:

{
  "content": "Product launch video",
  "profiles": ["instagram", "youtube", "tiktok"],
  "media": ["https://example.com/video.mp4"],
  "platforms": {
    "instagram": {
      "format": "reel",
      "first_comment": "Link in bio!"
    },
    "youtube": {
      "title": "Product Launch 2024",
      "privacy_status": "public",
      "cover_url": "https://example.com/yt-thumbnail.jpg"
    },
    "tiktok": {
      "privacy_status": "PUBLIC_TO_EVERYONE",
      "auto_add_music": true
    }
  }
}

Platform Parameters Reference

Instagram:

• format: "post" | "reel" | "story"
• collaborators: Array of usernames (max 10 for posts, 3 for reels)
• first_comment: String - comment to add after posting
• cover_url: String - thumbnail URL for reels
• audio_name: String - audio track name for reels
• trial_strategy: "MANUAL" | "SS_PERFORMANCE" - trial strategy for reels
• thumb_offset: String - thumbnail offset in milliseconds for reels

YouTube:

• title: String - video title
• privacy_status: "public" | "unlisted" | "private"
• cover_url: String - custom thumbnail URL

TikTok:

• privacy_status: "PUBLIC_TO_EVERYONE" | "MUTUAL_FOLLOW_FRIENDS" | "FOLLOWER_OF_CREATOR" | "SELF_ONLY"
• photo_cover_index: Integer - index of photo to use as cover (0-based)
• auto_add_music: Boolean - enable automatic music
• made_with_ai: Boolean - mark content as AI-generated
• disable_comment: Boolean - disable comments
• disable_duet: Boolean - disable duets
• disable_stitch: Boolean - disable stitches
• brand_content_toggle: Boolean - mark as paid partnership (third-party)
• brand_organic_toggle: Boolean - mark as paid partnership (own brand)

Facebook:

• format: "post" | "story"
• first_comment: String - comment to add after posting
• page_id: String - page ID for posting to company pages

LinkedIn:

• organization_id: String - organization ID for company page posts

Twitter/X & Threads:

• No platform-specific parameters available

For complete documentation, see the Platform Parameters Reference.

Create a Draft Post

Create a draft post: "Review this before publishing" to linkedin

Publish a Draft Post

Publish draft post job-123

Check Post Status

What's the status of job job-123?

This will show detailed status including draft status, platform-specific errors, and publishing results.

Delete a Post

Delete post job-123

View History

Show me the last 5 posts I published

Troubleshooting

Server Won't Start

• Check API Key: Ensure POSTPROXY_API_KEY is set when registering with claude mcp add
• Check Node Version: Requires Node.js >= 18.0.0
• Check Installation: Verify postproxy-mcp is installed and in PATH
• Check Registration: Ensure the server is registered via claude mcp add and configuration is saved in ~/.claude/plugins/

Authentication Errors

• AUTH_MISSING: API key is not configured. Make sure you included --env POSTPROXY_API_KEY=... when running claude mcp add
• AUTH_INVALID: API key is invalid. Verify your API key is correct.

Validation Errors

• TARGET_NOT_FOUND: One or more profile IDs don't exist. Use profiles.list to see available profiles.
• VALIDATION_ERROR: Post content or parameters are invalid. The API now returns detailed error messages:
  • 400 errors: {"status":400,"error":"Bad Request","message":"..."}
  • 422 errors: {"errors": ["Error 1", "Error 2"]} - Array of validation error messages
  • Check the error message for specific validation issues

API Errors

• API_ERROR: PostProxy API returned an error. Check the error message for details.
• Timeout: Request took longer than 30 seconds. Check your network connection and API status.

Platform Errors

When checking post status with post.status, platform-specific errors are now available in the error field of each platform object:

• error: null - Post published successfully
• error: "Error message" - Detailed error message from the platform API
• Common errors include authentication issues, rate limits, content violations, etc.

Draft Post Issues

If you create a draft post (draft: true) but receive draft: false in the response:

• The response will include a warning field explaining that the API may have ignored the draft parameter
• This can happen if:
  • The API does not support drafts with media attachments
  • The API has specific limitations for draft posts under certain conditions
• Check the warning field in the response for details
• Enable debug mode (POSTPROXY_MCP_DEBUG=1) to see detailed logging about draft parameter handling

Debug Mode

Enable debug logging by setting POSTPROXY_MCP_DEBUG=1 when registering the server:

claude mcp add --transport stdio postproxy-mcp --env POSTPROXY_API_KEY=your-api-key --env POSTPROXY_BASE_URL=https://api.postproxy.dev/api --env POSTPROXY_MCP_DEBUG=1 -- postproxy-mcp

Development

Building from Source

git clone https://github.com/postproxy/postproxy-mcp
cd postproxy-mcp
npm install
npm run build

Running in Development Mode

npm run dev

License

MIT