Is io.github.conorbronsdon/postlint-mcp safe to use?

io.github.conorbronsdon/postlint-mcp has no known CVEs as of the latest MCPpedia security scan. It does not require authentication, so any local process can connect — keep this in mind in shared environments. Licensed under Apache-2.0.

How do I install io.github.conorbronsdon/postlint-mcp?

io.github.conorbronsdon/postlint-mcp supports copy-paste install configs on its MCPpedia page for Claude Desktop, Cursor, and Claude Code. Scroll to the Quick Install section and select your client.

What can io.github.conorbronsdon/postlint-mcp do?

io.github.conorbronsdon/postlint-mcp provides 10 tools: check_post_all, Tools, Setup, Codex, Verify and 5 more. See the full tools list on the server page for descriptions and parameters.

What AI clients work with io.github.conorbronsdon/postlint-mcp?

io.github.conorbronsdon/postlint-mcp is compatible with claude-desktop, cursor, claude-code. It uses stdio and sse and http transport.

Is io.github.conorbronsdon/postlint-mcp actively maintained?

io.github.conorbronsdon/postlint-mcp is actively maintained — last commit was 22 days ago.

io.github.conorbronsdon/postlint-mcp

@conorbronsdon/postlint-mcp

Check a social post against a platform's real character limit: X, Bluesky, LinkedIn, Threads.

186/wk 10 tools GitHub npm

No known CVEs

Apache-2.0 license

Actively maintained

Last commit 22d ago

Works with most clients

Transport: stdio, sse, http

10 tools · ~471 tok

Grade A · 0.2% of 200K ctx

MCPpedia last refreshed this data 8h ago

Edit this pageView history

io.github.conorbronsdon/postlint-mcp is an MCP server that check a social post against a platform's real character limit: X, Bluesky, LinkedIn, Threads. Its tool list has not been published yet over stdio, sse and http, requires no API key, and scores 85/100 on MCPpedia's security, maintenance and efficiency rubric.

Other

Step 1

Install in your client

Config is the same across clients — only the file and path differ.

Supported in Claude Desktopstdio, sse, http · Node 18+

Paste into ~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "postlint": {
      "args": [
        "/absolute/path/to/postlint-mcp/dist/index.js"
      ],
      "command": "node"
    }
  }
}

Are you the author?

Add this badge to your README to show your security score and help users find safe servers.

Embed in your READMEAbout badges →

[![MCPpedia Score](https://mcppedia.org/api/badge/io-github-conorbronsdon-postlint-mcp)](https://mcppedia.org/s/io-github-conorbronsdon-postlint-mcp)

Read me

What io.github.conorbronsdon/postlint-mcp does

Check a social post against a platform's real character limit before it ships. X, Bluesky, LinkedIn, Threads, Mastodon, Discord. Pure compute — no API, no auth, no network.

Test This Server

Run this in your terminal to verify the server starts. Then let us know if it worked — your result helps other developers.

npx -y '@conorbronsdon/postlint-mcp' 2>&1 | head -1 && echo "✓ Server started successfully"

After testing, let us know if it worked:

Loading README…

Scored, not listed

Why this score

Five weighted categories — click any category to see the underlying evidence.

Score breakdown

85/100across 5 weighted dimensions

How we score →

0255075100

−15

Security

Maintenance

Efficiency

Documentation

Compatibility

Categoriesclick a row to see evidence

Security

OSV.dev

No known CVEs.

Checked @conorbronsdon/postlint-mcp against OSV.dev.

Inventory

Tools (10)

Click any tool to inspect its schema.

~471 tokens total

Community

Reviews

Be the first to review

Have you used this server?

Share your experience — it helps other developers decide.

How easy was setup?Did it work reliably?How was the documentation?

Frequently Asked Questions

Is io.github.conorbronsdon/postlint-mcp safe to use?: io.github.conorbronsdon/postlint-mcp has no known CVEs as of the latest MCPpedia security scan. It does not require authentication, so any local process can connect — keep this in mind in shared environments. Licensed under Apache-2.0.
How do I install io.github.conorbronsdon/postlint-mcp?: io.github.conorbronsdon/postlint-mcp supports copy-paste install configs on its MCPpedia page for Claude Desktop, Cursor, and Claude Code. Scroll to the Quick Install section and select your client.
What can io.github.conorbronsdon/postlint-mcp do?: io.github.conorbronsdon/postlint-mcp provides 10 tools: check_post_all, Tools, Setup, Codex, Verify and 5 more. See the full tools list on the server page for descriptions and parameters.
What AI clients work with io.github.conorbronsdon/postlint-mcp?: io.github.conorbronsdon/postlint-mcp is compatible with claude-desktop, cursor, claude-code. It uses stdio and sse and http transport.
Is io.github.conorbronsdon/postlint-mcp actively maintained?: io.github.conorbronsdon/postlint-mcp is actively maintained — last commit was 22 days ago.

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MCP Security Weekly

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Community

Discussion

Start a conversation

Ask a question, share a tip, or report an issue.

Has anyone used this with Cursor?How do you handle auth?Any alternatives?

Edit this pageView history

Other

Step 1

Install in your client

Config is the same across clients — only the file and path differ.

Supported in Claude Desktopstdio, sse, http · Node 18+

Paste into ~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "postlint": {
      "args": [
        "/absolute/path/to/postlint-mcp/dist/index.js"
      ],
      "command": "node"
    }
  }
}

Are you the author?

Add this badge to your README to show your security score and help users find safe servers.

Embed in your READMEAbout badges →

[![MCPpedia Score](https://mcppedia.org/api/badge/io-github-conorbronsdon-postlint-mcp)](https://mcppedia.org/s/io-github-conorbronsdon-postlint-mcp)

Read me

What io.github.conorbronsdon/postlint-mcp does

Check a social post against a platform's real character limit before it ships. X, Bluesky, LinkedIn, Threads, Mastodon, Discord. Pure compute — no API, no auth, no network.

Test This Server

Run this in your terminal to verify the server starts. Then let us know if it worked — your result helps other developers.

npx -y '@conorbronsdon/postlint-mcp' 2>&1 | head -1 && echo "✓ Server started successfully"

After testing, let us know if it worked:

README

postlint-mcp

Check a social post against a platform's real character limit before it ships. X, Bluesky, LinkedIn, Threads, Mastodon, Discord. Pure compute — no API, no auth, no network.

Three drafts checked in a terminal: an X post at 308 of 280 with three URLs billed at 23 each, a Bluesky post at 302 of 300, and that same draft with its link still a [URL] placeholder, which a length check reads as 277 but the server prices at exactly 300 of 300

_{Recorded from docs/demo.tape with vhs. The posts and counts come from scripts/fixtures.mjs, which the regression tests import too.}

An MCP server that answers one question: does this post fit?

A language model cannot count characters by inspection, and on these platforms neither can you. The limits are not what they look like. X bills every URL at 23 characters through t.co whether the link is 12 characters or 200. Bluesky counts extended grapheme clusters, so a four-person family emoji is 1 and not 11. Mastodon charges nothing for the domain on a remote mention. Getting any of that wrong shows up as a rejected post, or a truncated one, at publish time.

Counting is what a tool call is for. The model cannot do it by inspection, and a deterministic function can do it exactly.

Why this exists. Two posts went out of a podcast promo workflow over the limit. A Bluesky post shipped at 302 against 300, with the line "Under 300 graphemes. Audit clean." sitting directly beneath it. An X post was drafted at 308 against 280 and would have been rejected on launch morning. Both were invisible to eyeballing, because in both cases the count was a claim and not a measurement. Both are regression tests in this repo.

Tools

Tool	What it returns
`check_post`	Verdict for one platform: counted length, the limit, headroom, and what drove the count
`check_post_all`	One row per platform, with the breakdown attached only to the rows that fail
`platform_limits`	Each platform's limit, its counting unit, why that unit is not a character count, and the source

Responses are small on purpose. check_post_all omits the arithmetic on passing rows because agents pay tokens per response.

How each platform counts

Platform	Limit	Unit	The part that surprises people	Source
`x`	280	weighted characters	Every URL costs exactly 23. CJK, Hangul, and emoji cost 2 each; Latin, Greek, Cyrillic, Hebrew, and Arabic cost 1. An emoji sequence is one unit of 2, not 2 per code point.	twitter-text v3 config
`x_premium`	25,000	weighted characters	Same weighting, higher ceiling.	X help center
`bluesky`	300	graphemes	Flags, ZWJ emoji, skin-tone modifiers, and combining accents each count as 1. UR

... View full README on GitHub

Loading README…

Scored, not listed

Why this score

Five weighted categories — click any category to see the underlying evidence.

Score breakdown

85/100across 5 weighted dimensions

How we score →

0255075100

−15

Security

Maintenance

Efficiency

Documentation

Compatibility

Categoriesclick a row to see evidence

Security

OSV.dev

No known CVEs.

Checked @conorbronsdon/postlint-mcp against OSV.dev.

Inventory

Tools (10)

Click any tool to inspect its schema.

~471 tokens total

Community

Reviews

Be the first to review

Have you used this server?

Share your experience — it helps other developers decide.

How easy was setup?Did it work reliably?How was the documentation?

Frequently Asked Questions

Is io.github.conorbronsdon/postlint-mcp safe to use?: io.github.conorbronsdon/postlint-mcp has no known CVEs as of the latest MCPpedia security scan. It does not require authentication, so any local process can connect — keep this in mind in shared environments. Licensed under Apache-2.0.
How do I install io.github.conorbronsdon/postlint-mcp?: io.github.conorbronsdon/postlint-mcp supports copy-paste install configs on its MCPpedia page for Claude Desktop, Cursor, and Claude Code. Scroll to the Quick Install section and select your client.
What can io.github.conorbronsdon/postlint-mcp do?: io.github.conorbronsdon/postlint-mcp provides 10 tools: check_post_all, Tools, Setup, Codex, Verify and 5 more. See the full tools list on the server page for descriptions and parameters.
What AI clients work with io.github.conorbronsdon/postlint-mcp?: io.github.conorbronsdon/postlint-mcp is compatible with claude-desktop, cursor, claude-code. It uses stdio and sse and http transport.
Is io.github.conorbronsdon/postlint-mcp actively maintained?: io.github.conorbronsdon/postlint-mcp is actively maintained — last commit was 22 days ago.