WriteHero: LinkedIn post checker
Check LinkedIn posts for character limits, formatting, hooks, and AI-sounding phrases before publishing.
Analyzes LinkedIn posts for character count, see-more cutoff, hook effectiveness, and AI-written phrases. Converts Markdown to LinkedIn-compatible text, generates opening-line templates and profile headlines, and previews posts on mobile and desktop.
Try asking Muse: "Check my LinkedIn post to make sure it's under the character limit and doesn't sound too AI-written before I publish it."
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Source: Found in the official MCP Registry (io.writehero/linkedin) · First listed October 30, 2026
Last 24 hours
Each bar is one check, every 15 minutes. Green means it answered. Last checked 2 h ago.
Is it safe to connect?
What Muse can see: It does not ask you to sign in, so it cannot see your accounts. It only sees what Muse sends it from your request.
Before it acts: Read what Muse plans to do before you approve it, and remove the app from Muse when you stop using it.
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How to add it to Muse
Not in Muse's Connectors list yet, but Muse can still use it. Copy the request below and paste it into Muse. Muse asks before it shares anything with the app's site. Meta does not review apps used this way, so only use ones you trust. We tested this in the Muse app on September 24, 2026: Muse used an app's link directly this way and returned a live answer.
https://writehero.io/api/mcpNot in Muse's Connectors list yet. Muse can still use it: its page gives you a request to paste into Muse.
Also use it in ChatGPT or Claude
WriteHero: LinkedIn post checker is a remote MCP server, so any assistant that can add a custom connector by link can use it. Same link, same tools.
Add it to ChatGPT
- 1
Open ChatGPT settings
In ChatGPT, open Settings, then Connectors (called Apps & Connectors on some accounts).
- 2
Turn on developer mode
Under Advanced settings, switch on Developer mode. That is what lets you add a connector by link.
- 3
Create the connector
Choose Create, give it a name, paste the link as the MCP server URL, and save. If it needs a sign-in, ChatGPT asks for it here.
- 4
Use it in a chat
Start a chat, open the tools menu, pick the connector, and ask. ChatGPT asks before it runs a tool the first time.
Custom connectors need a paid ChatGPT plan, and on Team, Enterprise and Edu accounts only an admin can add them. Our "Working" label means the server answered us; it cannot tell whether your plan lets you add it. All connectors that work in ChatGPT
Add it to Claude
- 1
Open Claude settings
In Claude, open Settings, then Connectors.
- 2
Add a custom connector
Choose Add custom connector, give it a name, and paste the link.
- 3
Connect and use it
If it needs a sign-in, Claude sends you to it. Then turn the connector on in a chat from the tools menu and ask.
Custom connectors are available on paid Claude plans; on Team and Enterprise accounts an admin may need to add them. Our "Working" label means the server answered us; it cannot tell whether your plan lets you add it. All connectors that work in Claude
https://writehero.io/api/mcpWhat people ask Muse to do
Technical details: safety screening, tools, response time and recent checks
Response time at the last check: 598ms. Worked in n/a of checks over 30 days.
Screening · October 30, 2026
Screened, no issues found
Screening looks for known threats and hidden instructions at the time of the check, and runs again weekly and whenever the tool list changes. It cannot see the server's code, so only connect what you need and review what Muse asks to do. How screening works.
Tools · 6
check_linkedin_postCheck a LinkedIn post before publishing: character count against LinkedIn's 3000-character limit, the text likely shown before "see more" on desktop, a hook score, Markdown that LinkedIn will not render, placeholders, and phrases that read as AI-written. Returns concrete issues tformat_linkedin_postConvert Markdown into text that pastes cleanly into LinkedIn: **bold** and headings become Unicode bold, *italic* becomes Unicode italic, list markers become bullets, Markdown links become plain URLs. Optionally replaces em dashes.style_linkedin_textRestyle a short piece of text with Unicode letters that keep their look when pasted into LinkedIn (bold, italic, bold italic, serif, cursive, strikethrough, underline). Use sparingly; screen readers may read styled letters poorly.generate_linkedin_hooksOpening-line templates for a LinkedIn post, filled with the user's topic, audience and result. Anything the user has not supplied stays in [brackets] to replace with a real detail; nothing is invented.generate_linkedin_headlinesProfile headline options built only from the user's role, audience, outcome, proof and keywords. Every option fits LinkedIn's 220-character headline limit. Does not change the profile.preview_linkedin_postReturn a link to an approximate preview of the post in the LinkedIn feed on mobile and desktop, including about where "see more" cuts it. Pass author_name and author_headline when you know them. Opening the link saves and publishes nothing. The post text travels in the link, so sLink
https://writehero.io/api/mcpQuestions about WriteHero: LinkedIn post checker in Muse
How do I connect WriteHero: LinkedIn post checker to Muse?
Not in Muse's Connectors list yet, but Muse can still use it. Paste this into Muse: "Use WriteHero: LinkedIn post checker to help me. It is a free service with an MCP server at https://writehero.io/api/mcp. It does not need an API key. Ask me before you share anything with it." Muse asks before it shares anything with the app's site. Meta does not review apps used this way, so only use ones you trust. We tested this in the Muse app on September 24, 2026: Muse used an app's link directly this way and returned a live answer.
Is WriteHero: LinkedIn post checker working right now?
At the last check (October 30, 2026, 05:01 UTC) the endpoint was working, answering in 598ms. It is checked every 15 minutes.
Is WriteHero: LinkedIn post checker safe to connect to Muse?
It was screened on October 30, 2026 with the result "screened, no issues found". Screening checks the domain against threat feeds and reads the tools for hidden instructions and requests for passwords or card numbers. It cannot see the server's code, so grant only the access you need.
What can WriteHero: LinkedIn post checker do in Muse?
It exposes 6 tools, including check_linkedin_post, format_linkedin_post, style_linkedin_text, generate_linkedin_hooks. For example, you could ask Muse: "Check my LinkedIn post to make sure it's under the character limit and doesn't sound too AI-written before I publish it."
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This listing was added from public sources (Found in the official MCP Registry (io.writehero/linkedin)). If you build WriteHero: LinkedIn post checker, claim it to correct the details and get your badge.
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<a href="https://musedirectory.ai/connector/writehero-linkedin-post-checker"><img src="https://musedirectory.ai/badge/writehero-linkedin-post-checker.svg" alt="WriteHero: LinkedIn post checker on musedirectory.ai" width="236" height="40"></a>