CURSOR

Add Mermail
in one click.

Add the hosted MCP server with OAuth—no API key required.

Start setup Read MCP docs

Why Cursor

Built for the agent you already use.

Mermail gives Cursor a dedicated inbox and payment layer so verification, checkout, and receipts stay in the same loop.

One-click MCP install, URL only

OAuth through console.mermail.app

No x-api-key in the Cursor config

Streamable HTTP — POST only

Before you start

Check 3 things.

Current Cursor with remote MCP and OAuth.

Allow the cursor:// link or add the URL manually.

Access to the intended Mermail workspace.

Cursor MCP docs

Success contract

Done when all 3 pass.

Mermail is enabled with no x-api-key header.

OAuth no longer shows Authenticate.

list_mailboxes succeeds in a new chat.

Three steps to connect.

Copy the Mermail MCP URL

Use Streamable HTTP and OAuth. Add no headers.

MCP endpoint

https://console.mermail.app/mcp

Add remote MCP (URL only)

Open the link and confirm the server in Cursor.

Add Mermail in Cursor

Install

cursor://anysphere.cursor-deeplink/mcp/install?name=mermail&config=eyJ0eXBlIjoiaHR0cCIsInVybCI6Imh0dHBzOi8vY29uc29sZS5tZXJtYWlsLmFwcC9tY3AifQ==

Authorize, then verify

Select Authenticate, finish OAuth, then run the check.

Verify

Ask: "List my Mermail mailboxes" (tool: list_mailboxes)

The deeplink did not open Cursor.

Add a remote HTTP server manually with URL https://console.mermail.app/mcp and no headers.

OAuth keeps looping.

Remove Mermail, add the URL again without headers, finish OAuth, then test list_mailboxes in a new chat.

See all integrations

Integration index

Claude Code

Connect OAuth and install 15 skills for inbox, verification, and x402 workflows.

Claude Duet

Add Mermail as a custom connector on claude.ai. Duet uses it from your Claude account.

ChatGPT

Add Mermail as a custom OAuth app in an eligible ChatGPT workspace.

Dot

Connect Mermail through ChatGPT Apps for email and payments your dot can use with your permission.

Codex

Connect OAuth and install 15 skills for inbox and x402 workflows.

Grok

Connect Mermail to Grok web chat and Grok Bot with OAuth, PayBox, and inline MCP Apps.

OpenClaw

Connect with OAuth, then verify Mermail with a live probe.

Hermes

Add Mermail to Hermes with Streamable HTTP OAuth.

Muse