Postcard for Claude.ai

com.clawhard/postcard

Check a link's share card on X, Facebook, LinkedIn: real image size, tag problems, fixed tags.

client:Claude.ai transport:streamable-http tools:2

Install Postcard in Claude.ai

Settings → Connectors → Add custom connector

https://postcard.clawhard.com/mcp

Claude on the web takes a remote URL and completes OAuth in the browser. For a packaged server use Claude Desktop or Claude Code instead. Claude.ai docs

What Claude.ai can do once it is connected

postcard_check_link_preview
postcard_check_preview_tags

Postcard in other clients

Claude Code
Claude Desktop
Cursor
VS Code
Zed
Windsurf
Cline
Gemini CLI
Grok
ChatGPT
LangChain

Postcard MCP server