PaperAgent — Send Physical Mail for Claude.ai

dev.paperagent/letters

Mail one-off USPS letters from ChatGPT or Claude after you approve the preview and price. US only.

client:Claude.ai transport:streamable-http tools:8

Install PaperAgent — Send Physical Mail in Claude.ai

Settings → Connectors → Add custom connector

https://paperagent.dev/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

get_pricing
validate_address
create_draft
update_draft
preview_draft
send_letter
get_letter_status
list_letters

PaperAgent — Send Physical Mail in other clients

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

PaperAgent — Send Physical Mail MCP server