# Postcard Muse connector

From musedirectory.ai, the independent directory of Meta Muse connectors. Not affiliated with Meta.

## Postcard

Check how a link will look when shared on X, Facebook and LinkedIn before you post it.

- Record: https://musedirectory.ai/connector/postcard
- Category: Marketing & Ads
- Developer: Clawhard (https://postcard.clawhard.com)
- Muse status: Extra setup. Not in Muse's Connectors list yet. Muse can still use it: its page gives you a request to paste into Muse.
- Health: Working, 101ms, checked 2026-11-13T14:41:16Z
- Endpoint: https://postcard.clawhard.com/mcp
- Auth: No account needed; Pricing: unknown
- Screening: Screened, no issues found (2026-11-13T14:41:16Z)
- Source: Found in the official MCP Registry (com.clawhard/postcard) https://registry.modelcontextprotocol.io/v0/servers?search=com.clawhard%2Fpostcard

Fetches a public page the way a link crawler does and reads its Open Graph and Twitter card tags. Reports the card each platform will build, the real pixel size and format of the share image, and problems like missing tags, relative image paths or titles that get cut off, with a paste-ready meta block to fix them.

Example request: "Check whether my new landing page will show the right image and title when I share it on LinkedIn."

How to connect: Not in Muse's Connectors list yet, but Muse can still use it. Paste this into Muse: "Use Postcard to help me. It is a free service with an MCP server at https://postcard.clawhard.com/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.

Tools:
- postcard_check_link_preview: Use when the user asks how a link will look when shared, why a shared link shows no image or the wrong title, or wants a page checked before a launch post (signals: "link preview", "og:image not showing", "Twitter card", "X card", "social card", "share image", "unfurl", "Open Gra
- postcard_check_preview_tags: Use when the share-card tags need checking in HTML that is not public yet: a page being built, a localhost or staging page, a template, or a <head> block the user pasted (signals: "check my meta tags", "are these og tags right", "before I deploy", "Next.js metadata", "index.html 

Screening checks:
- MCP handshake: pass (Answered in 101ms)
- Domain against threat feeds (Cloudflare security DNS): pass (postcard.clawhard.com not flagged)
- Published packages against the OSV malicious-package database: n/a (No npm or PyPI package published)
- Hidden instructions or invisible characters in tool text: pass (2 tools read, nothing found)
- Inputs asking for passwords, card numbers or seed phrases: pass (None found)
- Domain and redirects: pass (Domain registered 284 days ago)
- AI review of purpose and tool behavior: pass (No concerns)