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CURSOR

Add Mermail
in one click.

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

Start setupRead 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.

1

Copy the Mermail MCP URL

Use Streamable HTTP and OAuth. Add no headers.

MCP endpoint
https://console.mermail.app/mcp
2

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==
3

Authorize, then verify

Select Authenticate, finish OAuth, then run the check.

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

A FEW GOOD QUESTIONS

Questions,
answered.

Fast fixes for auth, setup, and discovery.

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.

ChatGPT

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

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.