Draft with your assistant.
Draft and edit a letter in chat. Review the pages and addresses on Pony before checkout.
1. Choose your assistant
Connect Pony to Claude
In Claude, open Settings → Connectors → Add custom connector. Name it Mail by Pony and paste this URL.
https://www.mailbypony.com/mcpConnect Pony to Claude Code
Run this in your terminal. Then type /mcp in Claude Code, choose mail-by-pony and pick Authenticate. Sign in to Pony and approve the connection.
claude mcp add --transport http mail-by-pony https://www.mailbypony.com/mcpConnect Pony to ChatGPT
Our ChatGPT app listing is being prepared. If your ChatGPT plan lets you add custom connectors, add one with this URL.
https://www.mailbypony.com/mcpConnect Pony to Cursor
Add this to ~/.cursor/mcp.json, then turn on mail-by-pony in Cursor’s MCP settings.
{"mcpServers":{"mail-by-pony":{"url":"https://www.mailbypony.com/mcp"}}}Connect Pony to VS Code
Add this to .vscode/mcp.json in your project (or run MCP: Add Server from the Command Palette and choose HTTP), then use it from Copilot Chat in Agent mode.
{"servers":{"mail-by-pony":{"type":"http","url":"https://www.mailbypony.com/mcp"}}}Connect Pony to Grok
Go to grok.com/connectors, choose New Connector → Custom, name it Mail by Pony and paste this URL. Sign in to Pony when Grok asks. Full Grok guide.
https://www.mailbypony.com/mcp/signinConnect Pony to Gemini CLI
Run this in your terminal, then start Gemini CLI and type /mcp to check it’s connected.
gemini mcp add --transport http mail-by-pony https://www.mailbypony.com/mcpConnect Pony to your assistant
Any MCP client that supports Streamable HTTP can connect to this URL. Agents can read llms.txt for the full tool list and rules.
https://www.mailbypony.com/mcpConnect your Pony account to start drafting. Sign in on Pony and approve your assistant’s access to create and edit letters. You review the final letter and pay on the website.
2. Try it in your assistant
Once connected, try this prompt:
What paper styles and prices are available on Mail by Pony?3. Write and send on Pony
Open Pony to check the printed pages, addresses and price, then pay to place the order.
Write your letterYou stay in charge.
- Your assistant writes the letter and shows you the proof. When you say send, it gives you one payment link. Paying sends the letter.
- Sending often? Add money to your balance and allow your assistant in Account → Credits. It can then send without a payment link each time.
- Save addresses in chat. Your assistant can enter the details you provide or reuse saved address references.
- Order status shows what has happened. “Mailed” means handed to USPS.