1
Copy the Mermail MCP URL
Streamable HTTP only (POST). OAuth path: URL only — do not add x-api-key. Cursor discovers Protected Resource Metadata after a 401.
MCP endpoint
https://console.mermail.app/mcpCURSOR
Add Mermail
in one click.
Install the hosted MCP server with OAuth. Cursor discovers Protected Resource Metadata after a 401, then your agent can read mail and act on payments inside the IDE.
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
Three steps to connect.
2
Add remote MCP (URL only)
Click to install Mermail in Cursor (OAuth, no headers). Cursor opens and prompts you to confirm the server.
Add Mermail in CursorInstall
cursor://anysphere.cursor-deeplink/mcp/install?name=mermail&config=eyJ0eXBlIjoiaHR0cCIsInVybCI6Imh0dHBzOi8vY29uc29sZS5tZXJtYWlsLmFwcC9tY3AifQ==3
Authorize, then verify
When Cursor prompts, choose Authenticate / Connect Mermail, sign in with Google on console.mermail.app, pick a workspace, then ask Cursor to list your mailboxes.
Verify
Ask: "List my Mermail mailboxes" (tool: list_mailboxes)Questions, answered.
Auth, transports, and how to confirm the connection before you trust the agent.
Do I need an API key in Cursor?+
No. The Cursor path is OAuth. Add the MCP URL only and complete Google consent on console.mermail.app.
The deeplink did not open Cursor.+
Add a remote MCP server manually with type http and URL https://console.mermail.app/mcp. Do not attach an x-api-key header on the OAuth path.
What if I want an API key instead?+
Export MERMAIL_API_KEY in the environment that launches Cursor, then add headers { "x-api-key": "${env:MERMAIL_API_KEY}" } on the same Streamable HTTP URL.
How do I know Mermail is connected?+
Ask the agent to list your Mermail mailboxes. A healthy connection exposes the hosted MCP tools, including list_mailboxes.
See all integrations
Integration indexClaude
Install the Mermail plugin so Claude can provision an inbox, read verification mail, and finish paid workflows without leaving the terminal.
ChatGPTAdd Mermail as a custom ChatGPT connector. Streamable HTTP plus OAuth — no API key in the connector. Then ChatGPT can list mailboxes, read mail, and finish paid workflows.
CodexInstall the Mermail plugin so Codex maps MERMAIL_API_KEY into MCP, loads 11 skills, and can list mailboxes, draft replies, and complete checkout.
OpenClawPoint OpenClaw at hosted MCP with Streamable HTTP and x-api-key. Probe the connection, then let the agent manage inboxes and payment receipts.
HermesAdd Mermail as a Streamable HTTP MCP server in Hermes Agent. OAuth opens a browser, then the agent can list mailboxes, read mail, and finish paid workflows in chat.