# Postlint MCP Server (npm · @conorbronsdon/postlint-mcp)

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

- Trust score: 77/100 (medium)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-08-04

## Components

- npm · `@conorbronsdon/postlint-mcp`: 77/100 (this document), [markdown](https://verifymcp.io/servers/conorbronsdon-postlint-mcp/conorbronsdon-postlint-mcp.md), [page](https://verifymcp.io/servers/conorbronsdon-postlint-mcp/conorbronsdon-postlint-mcp)

## Channel facts

- Registry: `npm`
- Package: `@conorbronsdon/postlint-mcp`
- Version: `1.1.0`
- Transport: `stdio`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-08-04.

- **Supply Chain Security**: 87/100
  - No malware found by supply-chain analysis.
  - Only part of the dependency tree could be resolved (95 of 99), so this covers what we could see, not the whole tree.
  - No install/post-install scripts declared.
  - Only part of the dependency tree could be resolved (95 of 99), so this covers what we could see, not the whole tree.
- **Provenance & Transparency**: 97/100
  - Source repository is publicly reachable at the declared URL.
  - Cryptographically verified build provenance (signed, bound to conorbronsdon/postlint-mcp).
  - Clear OSI-approved license (Apache-2.0).
  - Actively maintained (last published 1 days ago).
  - Disclosure check failed: no security disclosure policy was found in the source repository.
- **Schema Quality & AI Usability**: 83/100
  - AI-judged instruction clarity (excellent).
  - Tool/resource definitions use about 354 tokens (~118/item across 3 items; 3 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 0/100
  - Stability not yet verified: not enough scan history yet (needs a 30-day window).
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% of tool parameters carry a description.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

**Unverified: 1 category.** A category scored 0 because we could not verify it: a data source with nothing on this package, evidence we could not reach, or a check we could not run. We only credit what we can confirm.

## Install

### Claude

```bash
claude mcp add conorbronsdon-postlint-mcp -- npx -y @conorbronsdon/postlint-mcp
```

### Codex

```bash
codex mcp add conorbronsdon-postlint-mcp -- npx -y @conorbronsdon/postlint-mcp
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "conorbronsdon-postlint-mcp": {
      "type": "local",
      "command": [
        "npx",
        "-y",
        "@conorbronsdon/postlint-mcp"
      ],
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add conorbronsdon-postlint-mcp --command npx --arg -y --arg @conorbronsdon/postlint-mcp
```

### Hermes

```yaml
mcp_servers:
  conorbronsdon-postlint-mcp:
    command: "npx"
    args: ["-y", "@conorbronsdon/postlint-mcp"]
```

### Other

```json
{
  "mcpServers": {
    "conorbronsdon-postlint-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@conorbronsdon/postlint-mcp"
      ]
    }
  }
}
```

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-08-03 (score 77, +7)

- [security improvement] Known CVEs: unverified → partial
- [functional improvement] Dependency health: unverified → partial

### 2026-08-02 (score 70)

First indexed and scored.

## MCP tools (3)

### `check_post` (~157 tokens)

Check a social post against one platform's real character limit and report whether it fits. Returns the counted length, the limit, and what drove the count (URLs billed at a fixed width, non-Latin characters billed double, emoji sequences collapsed to one grapheme). Use this before publishing anything with a hard limit — the counting rules are per-platform and are not text.length.

Input parameters:

- `platform` (string, required): Which platform's rules to apply: x, x_premium, bluesky, linkedin, threads, mastodon, discord.
- `text` (string, required): The post text, exactly as it will be published. Leading and trailing whitespace is trimmed, as the platforms do. `[URL]`-style placeholders are priced as a real link.

### `check_post_all` (~119 tokens)

Check one post against every platform at once and get a row per platform: counted length, limit, and whether it fits. Use this when deciding where a draft can go as-is. The per-platform arithmetic is included only for the platforms it fails, to keep the response small — call check_post for a single platform's full breakdown.

Input parameters:

- `text` (string, required): The post text, exactly as it will be published. Leading and trailing whitespace is trimmed, as the platforms do. `[URL]`-style placeholders are priced as a real link.

### `platform_limits` (~78 tokens)

List the platforms this server knows, with each one's limit, the unit it is measured in, why that unit is not a plain character count, and the source the number came from. Use it to explain a result or to see what is covered.

Input parameters:

- `platform` (string): Limit the response to one platform. Omit for all of them.

## Diagnostics

Captured diagnostic sections: Provenance, Dependencies. The full working is on the page: https://verifymcp.io/servers/conorbronsdon-postlint-mcp/conorbronsdon-postlint-mcp#diagnostics

## Score history

- 2026-08-04: 77
- 2026-08-03: 77
- 2026-08-02: 70

## Links

- npm package: https://www.npmjs.com/package/@conorbronsdon/postlint-mcp
- Socket report: https://socket.dev/npm/package/@conorbronsdon/postlint-mcp
- Repository: https://github.com/conorbronsdon/postlint-mcp
- Changelog RSS feed: https://verifymcp.io/servers/conorbronsdon-postlint-mcp/conorbronsdon-postlint-mcp/changelog.xml
- Changelog JSON feed: https://verifymcp.io/servers/conorbronsdon-postlint-mcp/conorbronsdon-postlint-mcp/changelog.json
- HTML version of this page: https://verifymcp.io/servers/conorbronsdon-postlint-mcp/conorbronsdon-postlint-mcp