Koskamo

Postlint MCP

A community MCP server that validates social media posts against the actual character limits of platforms like X, Bluesky, LinkedIn, Threads, Mastodon, and Discord. It handles complex counting rules such as graphemes, URL weighting, and CJK/emoji double-counting to ensure posts fit within platform constraints.

Package and access

Local package with source-attributed installation metadata. Koskamo does not execute packages during review.

Postlint MCP logo, by conorbronsdonCommunity listingLocal stdioSource reviewed; not executedPublished by conorbronsdon
Vendor documentation

What you can do with it

  • Check a post against X's 280-character limit with URL weighting
  • Validate Bluesky posts considering full URL length counting
  • Verify LinkedIn post body length against the 500-character limit
  • Check Mastodon posts for grapheme-based character limits

Source and maintenance

Community listingRegistry 1.1.0
mcp-registry: io.github.conorbronsdon/postlint-mcp@1.1.0Source repository
Maintenance checked

Packages and installation

Source-provided package data. Koskamo has not executed or live-probed this package.

@conorbronsdon/postlint-mcp 1.1.0

npmnpx
@conorbronsdon/postlint-mcp package definition
{
  "version": "1.1.0",
  "transport": "stdio",
  "identifier": "@conorbronsdon/postlint-mcp",
  "runtimeHint": "npx",
  "registryType": "npm"
}

Tools

Reported by the attributed source; not independently observed by Koskamo.

No tool definitions available.

Connect from your client

Each snippet configures the same source-provided package; replace placeholders before use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Cursor

Merge this local stdio configuration, replace every placeholder environment value, and restart Cursor. Koskamo has not executed this package.
Cursor configuration
{
  "mcpServers": {
    "postlint-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@conorbronsdon/postlint-mcp@1.1.0"
      ]
    }
  }
}

Cline

Merge this local stdio configuration, replace every placeholder environment value, and restart Cline. Koskamo has not executed this package.
Cline configuration
{
  "mcpServers": {
    "postlint-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@conorbronsdon/postlint-mcp@1.1.0"
      ]
    }
  }
}

VS Code

Merge this local stdio configuration, replace every placeholder environment value, and restart VS Code. Koskamo has not executed this package.
VS Code configuration
{
  "servers": {
    "postlint-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@conorbronsdon/postlint-mcp@1.1.0"
      ]
    }
  }
}

Claude Desktop

Merge this local stdio configuration, replace every placeholder environment value, and restart Claude Desktop. Koskamo has not executed this package.
Claude Desktop configuration
{
  "mcpServers": {
    "postlint-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@conorbronsdon/postlint-mcp@1.1.0"
      ]
    }
  }
}

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